EP1138097A1 - Demi-cadre - Google Patents

Demi-cadre

Info

Publication number
EP1138097A1
EP1138097A1 EP99964435A EP99964435A EP1138097A1 EP 1138097 A1 EP1138097 A1 EP 1138097A1 EP 99964435 A EP99964435 A EP 99964435A EP 99964435 A EP99964435 A EP 99964435A EP 1138097 A1 EP1138097 A1 EP 1138097A1
Authority
EP
European Patent Office
Prior art keywords
antenna
loop antenna
antenna according
bracket
parallel
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP99964435A
Other languages
German (de)
English (en)
Other versions
EP1138097B1 (fr
Inventor
Ralf Schultze
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP1138097A1 publication Critical patent/EP1138097A1/fr
Application granted granted Critical
Publication of EP1138097B1 publication Critical patent/EP1138097B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q7/00—Loop antennas with a substantially uniform current distribution around the loop and having a directional radiation pattern in a plane perpendicular to the plane of the loop
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q9/00—Electrically-short antennas having dimensions not more than twice the operating wavelength and consisting of conductive active radiating elements
    • H01Q9/04—Resonant antennas
    • H01Q9/30—Resonant antennas with feed to end of elongated active element, e.g. unipole
    • H01Q9/42—Resonant antennas with feed to end of elongated active element, e.g. unipole with folded element, the folded parts being spaced apart a small fraction of the operating wavelength
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/36—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/42—Housings not intimately mechanically associated with radiating elements, e.g. radome
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q9/00—Electrically-short antennas having dimensions not more than twice the operating wavelength and consisting of conductive active radiating elements
    • H01Q9/04—Resonant antennas
    • H01Q9/30—Resonant antennas with feed to end of elongated active element, e.g. unipole
    • H01Q9/40—Element having extended radiating surface

Definitions

  • the invention relates to a half-loop antenna, in particular a half-loop antenna for use on a motor vehicle.
  • the half-loop antenna known from the literature consists of a semicircular metallic conductor or antenna ball guided over a ground plane, as is shown by way of example in FIG. 5.
  • the mode of operation of the known half-loop antenna corresponds to that of a folding monopoly.
  • their radiation diagram in the vertical and horizontal planes is approximately that of a monopole, for example a ⁇ / 4 radiator.
  • a half loop antenna designed for a resonance length of ⁇ / 2 has a height of 83% of a ⁇ / 4 antenna.
  • the antennas have an impedance above 100 ⁇ at their resonance frequency. Furthermore, the increase in the capacity of an antenna causes a radiation behavior which is broadband in the frequency band. Furthermore, the increase in the capacity of an antenna can be effectively achieved by increasing its dimension in its voltage maximum.
  • a ⁇ / 2 half-loop antenna has its maximum voltage on half the antenna length, i.e. in the highest point of the conductor bend above the ground plane. From EP-0 684 661 an antenna unit is known which has a substrate and a radiator attached to the substrate, the radiating part of which is a flat plate which is arranged parallel to the substrate. The radiating part has a supply connection and an earth connection.
  • a flat antenna arrangement for frequencies in the GHz range which consists of an antenna for satellite-based vehicle navigation (GPS) and at least one antenna for mobile radio, which is in a common housing on a conductive surface of greater extent, are arranged in particular on a vehicle body.
  • GPS satellite-based vehicle navigation
  • the GPS antenna is preferably designed as a stripline antenna with transverse radiation, consists of a plate made of a dielectric material that is continuously metallized on one side, as a ground plane, and on the other side, in the radiation direction, is provided with a partial metallization, and where the mobile radio antenna has all-round characteristics in the horizontal radiation diagram and the large conductive area for this antenna is used as the ground reference area.
  • a disadvantage of the known flat antennas is their need for space, especially when used on motor vehicles.
  • the invention is therefore based on the object of developing a half-loop antenna which can be used in particular in the motor vehicle sector for mobile radio, with the most compact and small-sized design possible being achieved while maintaining good antenna characteristics.
  • the object is achieved by the features of claim 1.
  • Preferred embodiments of the invention are the subject of the dependent claims.
  • the antenna bracket is formed by a surface, the outer surface of which Edge forms a convex curve, ie is curved outwards.
  • the surface of the antenna bracket is preferably arranged either parallel to the base plane or curved outwards. Furthermore, the surface of the antenna bracket can also be arranged obliquely to the base surface.
  • the development of the antenna bow has the shape of an ellipse tapering at its ends.
  • an inductor is inserted on the antenna signal side of the antenna bracket. Furthermore, the connection between the antenna bracket and the base plane can be made by a further inductance.
  • the flat antenna ball preferably has a dielectric on its outside. Furthermore, the antenna can be protected by a radome, wherein the radome can be used as a dielectric.
  • the inductance or the inductances are preferably designed as a spring, the restoring force of which is the metallic one Flat area of the antenna bracket or parts thereof against the radome.
  • the metallic antenna ball can also be applied as a metallic surface on the inside of the radome.
  • the antenna area of the half-loop antenna can be implemented as a skeleton antenna, the area of the antenna bracket being formed by a thin metallic conductor which forms the outer edge of the antenna area.
  • the configuration of the antenna bow as a surface with a convex edge advantageously brings about an increase in the capacitance of the antenna with the smallest base area, as a result of which a radiation behavior which is broader in the frequency band is achieved. Furthermore, by increasing the self-capacitance of the antenna, the impedance at the resonance or operating frequency can be shifted to lower values, such as 50 ⁇ .
  • neither the horizontal nor the vertical radiation diagram are influenced by the selected geometry or only influenced to a small extent. Increasing the capacity offers the possibility of shortening the mechanical length of the conductor bend, so that with a corresponding reduction in the mechanical length of the conductor bend, the overall height is reduced to 50% of a ⁇ / 4 radiator.
  • a feed network is inserted between the antenna bracket and one of the antenna connections, the feed network having at least one first resonance circuit which comprises an inductance and a capacitance.
  • the half-loop antenna can transmit signals in at least two frequency ranges radiate and / or receive.
  • a half-band antenna capable of multiple bands is thus realized, which at the same time has the most compact and small-sized design possible.
  • the feed network comprises at least a first additional impedance, which is selected such that the impedance of the half-loop antenna is matched to a predetermined impedance at the feed point. In this way, the impedance of the half-loop antenna can be fine-tuned in the frequency bands used in each case.
  • the feed network has several resonance circuits of different resonance frequencies. In this way, more than two frequency ranges can be realized, in which the half-loop antenna can send and / or receive signals, while maintaining its compact and small-sized design.
  • FIG. 3 shows a third embodiment of the half-loop antenna according to the invention
  • 4 shows a fourth embodiment of the half-loop antenna according to the invention
  • 5 shows a known half-loop antenna
  • FIG. 6 shows a half-loop antenna with an inserted feed network in a first embodiment
  • FIG. 7 shows a feed network in a second embodiment
  • FIG. 8 shows a feed network in a third embodiment
  • FIG. 9 shows a feed network in a fourth embodiment
  • FIG. 10 shows a feed network in a fifth embodiment
  • FIG. 11 shows a feed network in a sixth embodiment
  • FIG. 12 shows a feed network in a seventh embodiment
  • FIG. 13 shows a feed network in an eighth embodiment
  • FIG. 14 shows a feed network in a ninth embodiment.
  • Fig. 1 shows the first embodiment of the half-loop antenna according to the invention, consisting of a flat metallic antenna bracket 1, which is arranged above a base plane 2, the antenna bracket 1 at point 3 having its feed, ie the antenna signal, while the other side in Point 4 contacted the basic level 2.
  • the Halfloop The antenna thus acts as a folding monopoly.
  • the surface 5 of the antenna bracket 1 has the shape of an ellipse tapering at its ends during processing.
  • the edge 6 delimiting the antenna area 5 is a concave, that is to say curved outward, closed curve.
  • This flat design results in an increase in the capacity of the antenna, so that a more broadband radiation behavior is achieved in the frequency band.
  • the impedance of the antenna at the resonance or operating frequency can be shifted to lower values, for example 50 ⁇ , but the horizontal and vertical radiation diagram of the flat, in the present case curved or not only slightly Measure is affected.
  • the increase in capacity offers the possibility of shortening the mechanical length of the conductor bend. For example, if the mechanical length of the conductor bow is shortened accordingly, the overall height is reduced to approximately 50% of a ⁇ / 4 radiator.
  • the antenna equipped with the flat geometry has an impedance adapted to the transmission source or to the receiver, a higher bandwidth and a lower overall height with an unchanged radiation diagram.
  • the effect of the broadening of the antenna geometry corresponds to the head capacity of a ⁇ / 4 radiator.
  • FIG. 2 shows a further embodiment of the half-loop antenna.
  • an inductor 7, ie extension coil can be inserted into the antenna bracket 1.
  • the Extension coil 7 inserted at the feed point 3.
  • the shape of the antenna bracket 1 in the development results in an ellipse that tapers only at one end.
  • the area 5 of the antenna bow 1 extends essentially obliquely (viewed at the ground point 4) to parallel (viewed in the figure at the rear edge of the area 6) to the base plane 1. Since the ⁇ / 2 half-loop antenna has its current maxima at the conductor ends, ie at the feed point 3 and at the contact point 4 to the ground plate 2, it has its greatest effect there.
  • Extension coil 7 at the feed point 3 of the antenna bracket 1 remains as the radiator only the remaining segment remaining due to the shortening, i.e. the area 5, the conductor bow 1 received. This means a further reduction in the overall height to 30% of a ⁇ / 4 radiator and one
  • FIG. 3 shows a third embodiment of the half-loop antenna according to the invention, in which a further extension coil 8 (inductance) is inserted into the antenna bracket 1.
  • the further extension coil 8 is inserted at the point 4 of the antenna bracket 1 which contacts the base plane 2 and distributes the
  • the most effective way of increasing the antenna capacity is by increasing its dimension in its voltage maximum or by assigning it to a
  • the antennas can be covered with a dielectric on their upper side in order to increase the antenna capacity.
  • the effect of a radome as a dielectric can thus be optimally utilized.
  • the metallic surface of the antenna bracket is in direct contact with the radome, the action of the radome as a dielectric can further reduce the area of the bracket and thus the overall length and width.
  • an undefined detuning of the antenna is prevented, which is caused by a different distance of the
  • Radomes to the metallic surface of the conductor bow can arise due to manufacturing tolerances.
  • an embodiment is therefore favorable in terms of production technology, in which the metallic surface of the antenna bracket or parts thereof are fastened directly to the inside of the radome or, in the preferred case, vapor-deposited, and then contacted with the rest of the antenna bracket 1. Furthermore, it is possible to design the extension coils 7, 8 in accordance with the second or third embodiment in such a way that they function as a spring, the restoring force of which presses the metallic surface of the antenna bracket 1 or parts thereof against the radome.
  • Fig. 4 shows a further embodiment of the half-loop antenna according to the invention, in which the
  • Head capacity is designed in the form of a skeletal antenna.
  • Antenna bow 1 is replaced by a thin metallic conductor 9, which represents the outer edge 6 of the surface 5.
  • a skeleton antenna corresponding to the second embodiment is depicted here. With such an antenna, there is advantageously the possibility of arranging additional antennas, for example a GPS patch antenna, under the half-loop antenna.
  • Multi-band antennas are increasingly being used to meet the growing requirements of wireless communication.
  • two-band antennas In two-band operation, so-called two-band antennas are used, which can transmit and / or receive electromagnetic waves at two operating frequencies. Such a two-band antenna has a resonance at each of these two operating frequencies.
  • Flat antennas that are easy to integrate or are suitable for hidden installation, for example in a motor vehicle, are the trend for such multi-band applications.
  • either a plurality of resonator elements are required, which are in their Distinguish resonance frequency and either connected to a common feed point or coupled to a main resonator as parasite resonators, or radiator elements are used which can oscillate at several frequencies.
  • the antenna connections 3, 4 are on the one hand the feed point 3 and on the other hand the contact point 4 to the base plane 2, which forms a reference potential.
  • the feed network 10 is arranged between the antenna bracket 1 and the feed point 3. However, it could be inserted just as well between the antenna bracket 1 and the contact point 4 to the base plane 2.
  • the feed network 10 has a first parallel resonance circuit 40 as the first resonance circuit.
  • the first parallel resonance circuit 40 provides a parallel connection from a first inductance 15 and a first capacitance 20.
  • the first inductance 15 brings about a first resonance frequency f r ⁇ _ below the resonance frequency which was achieved when the antenna loop 1 was used alone for the half-loop antenna, ie without the feed network 10.
  • the first capacitance 20 produces a second resonance frequency f r 2 r which is greater than the first resonance frequency f r] _ and is above the resonance frequency which was achieved when the antenna loop 1 was used alone for the half-loop antenna, ie without a feed network 10.
  • the result is a two-band antenna which comprises a first frequency range with the first resonance frequency f r] _ as the center frequency and a second frequency range with the second resonance frequency f r 2 as the center frequency for transmitting and / or receiving signals, the resonance frequency being the half loop - Antenna when using the antenna bracket 1 alone, ie without the feed network 10, was between the two frequency ranges.
  • the first inductor 15 and the first Capacitance 20 must be dimensioned such that the resonance frequency of the first parallel resonance circuit 40 lies between the two realized frequency bands or between the two resonance frequencies f r ⁇ , f r 2.
  • the size of the antenna bracket 1 is reduced.
  • the impedance of the feed network 10 makes sense to dimension the impedance of the feed network 10 such that, together with the impedance of the antenna bracket 1, it results in a predetermined impedance at the feed-in point 3 in both frequency ranges used for transmitting and / or receiving signals.
  • an impedance specified for this contact point 4 must then be set accordingly by suitable dimensioning of the impedance of the feed network 10.
  • the desired impedance at the feed point 3 or at the contact point 4 to the base plane 2 can be achieved by dimensioning the first inductance 15 and the first capacitance 20, provided that the requirement that the resonance frequency of the first parallel resonance circuit 40 is between the first resonance frequency f r] _ and the second resonance frequency f r 2.
  • the first inductance 15 and the first capacitance 20 cannot be dimensioned in such a way that the desired impedance is reached at the feed-in point 3 or at the contact point 4 with the base plane 2, it can also be provided according to the invention to arrange at least one first additional impedance in the feed network 10 , which is selected so that the half-loop antenna is adapted to the predetermined impedance at the antenna connection 3, 4 connected to the feed network 10.
  • the at least one first additional impedance can be in a circuit branch of the first Parallel resonance circuit 40 or in series or parallel to the first parallel resonance circuit 40 may be arranged. According to FIG. 7, starting from the exemplary embodiment according to FIG. 6, the first parallel resonance circuit 40 is expanded, for example, in such a way that the first capacitance 20 has a
  • Adaptation inductance 25 is connected in series, which is dimensioned so that the predetermined impedance is set at the feed point 3.
  • such an adaptation inductance 25 can also be in series with the first
  • Parallel resonance circuit 40 may be connected to achieve the desired adaptation to the impedance at the feed point 3 according to Figure 6.
  • an appropriately dimensioned matching capacitor 26 can also be used for impedance matching, which in the example according to FIG. 9 is connected in series with the parallel resonance circuit 40, but could also be connected in series with the first inductance 15 in the parallel resonance circuit 40.
  • a predetermined impedance of 50 ⁇ can be provided.
  • the feed network 10 which in the example according to FIG. 6 comprises the first parallel resonance circuit 40 with the first inductance 15 and the first capacitance 20, represents a simple and inexpensive solution for realizing a half-loop antenna which transmit signals and / or in two different frequency ranges can receive.
  • the feed network 10 can also be designed as a series resonance circuit, as shown in FIG. 11 using a first series resonance circuit 50.
  • the first series resonant circuit 50 comprises a second
  • Inductance 16 which is connected in series to a second capacitance 21.
  • a tuning or fine-tuning of the impedance of the first series resonance circuit 50 to achieve the predetermined impedance of the half-loop antenna at the feed-in point 3 or at the contact point 4 to the base level 2 can now be achieved, starting from the first series resonance circuit 50, by one or more correspondingly dimensioned additional impedances in the Insert feed network 10. This can be done, for example, by connecting a further capacitance in parallel to the second
  • Inductance 16 or happen to the entire first series resonant circuit 50.
  • this can also be done by connecting a further inductance in parallel with the second capacitance 21 or the entire first series resonance circuit 50.
  • the feed network 10 has several resonance circuits of different types
  • the feed network 10 can comprise, for example, a parallel connection of two series resonance circuits 50, 55, as shown in FIG. According to FIG. 12, a second series resonance circuit 55 is connected in parallel with the first series resonance circuit 50, the second series resonance circuit 55 being formed from a fourth inductor 31 and a fourth capacitance 36 connected in series therewith.
  • the feed network 10 has two series connected Parallel resonance circuits 40, 45 includes. 10
  • a second parallel resonance circuit 45 is connected in series to the first parallel resonance circuit 40, which forms a parallel connection of a third inductor 30 and a third capacitance 35.
  • FIG. 13 a parallel connection of the first parallel resonance circuit 40 with the first series resonance circuit 50 is shown as a further example, this parallel connection forming the feed network 10.
  • three frequency ranges can be realized in which the half-loop antenna can send and / or receive signals.
  • the inductances and capacitances of the two respective resonance circuits are to be dimensioned such that the resonance frequencies of the individual resonance circuits lie between the frequency ranges of the half-loop antenna that can be used for transmitting and / or receiving.
  • n + 1 frequency ranges for transmitting and / or receiving for the half-loop antenna can be implemented in a feed network 10 with n resonant circuits.
  • FIG. 14 shows an example of a parallel connection of the first series resonance circuit 50 with a series connection of the first parallel resonance circuit 40 and the second parallel resonance circuit 45.
  • the first series resonance circuit 50 could also be connected in series, for example, from more than two parallel resonance circuits, or a series connection from several parallel resonance circuits and a series resonance circuit be switched.
  • Fine tuning of the impedance matching in such half-loop antennas with more than two frequency ranges for transmitting and / or receiving signals is carried out in the manner described by correspondingly inserting additional impedances, as was described in accordance with FIG. 7, FIG. 8 and FIG. 9.
  • additional impedances can be used. As described, these can be arranged in one or more circuit branches of each resonance circuit of the feed network 10 or in series or in parallel thereto.
  • the feed network 10 With such a two-band half-loop antenna or multi-band half-loop antenna, there is a strong mutual influence on the one hand between the feed network 10 and the antenna bracket 1 and on the other hand between the impedances of the feed network 10.
  • the feed network 10 generates a current occupancy on the antenna bracket 1 which emits good radiation in all Operating frequency ranges of the half loop antenna enables.
  • the antenna bracket 1 can be tuned in connection with the feed network 10 so that the power radiated by the half loop antenna in the operating frequency ranges compared to that of ⁇ / 4 Spotlights has extremely low losses.
  • the radiation pattern of the half-loop antenna in the vertical and horizontal plane is approximately that of a monopole, such as a ⁇ / 4 radiator.
  • the antennas according to the preferred embodiments have a tapering profile both in the side view and in the top view, which has aerodynamically favorable properties.
  • the angle of rise of the side profile can be determined or the shape of the profile itself can be changed. This means that both a straight rising profile and a profile rising with a curvature can be realized.
  • the entire antenna has an excellent suitability for mobile use on vehicles due to its good aerodynamic properties, preferably in an installation position on the vehicle roof or the trunk lid.
  • the antenna is also suitable as an on-glass antenna, since it forms a smooth transition to the body thanks to its wedge-shaped shape when installed on the upper edge of the front or rear window.
  • the area of application of the flat antennas described above is, among other things, for sending and receiving signals in the GSM band.
  • a rod antenna for radio reception in which there is another antenna for sending and receiving signals integrated in the GSM band, does not exist or is not available, for example because it was implemented in the form of a rear window antenna, it is possible to install such a GSM antenna separately.
  • Such flat antennas are preferably installed where antennas are to be integrated into the vehicle geometry. Furthermore, radiation to the occupants of an antenna with omnidirectional characteristics can be minimized if it is in an installation position on or directly on the vehicle roof.
  • the antenna By dimensioning the antenna appropriately, it can also be used to transmit or receive vertically polarized electromagnetic waves in other frequency bands, for example in the electrical network.

Landscapes

  • Details Of Aerials (AREA)
  • Variable-Direction Aerials And Aerial Arrays (AREA)

Abstract

L'invention concerne un demi-cadre doté d'un étrier qui est placé sur un plan de base. L'étrier constitue une surface dont le bord extérieur forme une courbe convexe, c'est-à-dire est incurvé vers l'extérieur. De préférence, la projection développée de l'étrier conducteur a la forme d'une ellipse dont les extrémités sont effilées en pointes. Au point d'alimentation de l'étrier conducteur, on peut ajouter une inductance qui est conçue sous la forme d'un ressort.
EP99964435A 1998-12-11 1999-12-10 Demi-cadre Expired - Lifetime EP1138097B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19857191 1998-12-11
DE19857191A DE19857191A1 (de) 1998-12-11 1998-12-11 Halfloop-Antenne
PCT/DE1999/003966 WO2000036703A1 (fr) 1998-12-11 1999-12-10 Demi-cadre

Publications (2)

Publication Number Publication Date
EP1138097A1 true EP1138097A1 (fr) 2001-10-04
EP1138097B1 EP1138097B1 (fr) 2003-02-05

Family

ID=7890743

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99964435A Expired - Lifetime EP1138097B1 (fr) 1998-12-11 1999-12-10 Demi-cadre

Country Status (6)

Country Link
US (1) US6590541B1 (fr)
EP (1) EP1138097B1 (fr)
JP (1) JP4414599B2 (fr)
KR (1) KR100724300B1 (fr)
DE (2) DE19857191A1 (fr)
WO (1) WO2000036703A1 (fr)

Families Citing this family (91)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7609222B2 (en) * 2007-12-05 2009-10-27 Antennas Direct, Inc. Antenna assemblies with antenna elements and reflectors
US10957979B2 (en) 2018-12-06 2021-03-23 Antennas Direct, Inc. Antenna assemblies
USD881172S1 (en) 1975-11-03 2020-04-14 Antennas Direct, Inc. Antenna and base stand
USD868045S1 (en) 2008-02-29 2019-11-26 Antennas Direct, Inc. Antenna
USD809490S1 (en) 2008-02-29 2018-02-06 Antennas Direct, Inc. Antenna
USD867347S1 (en) 2008-02-29 2019-11-19 Antennas Direct, Inc. Antenna
US20140292597A1 (en) 2007-12-05 2014-10-02 Antennas Direct, Inc. Antenna assemblies with tapered loop antenna elements
USD666178S1 (en) 2008-02-29 2012-08-28 Antennas Direct, Inc. Antenna
US8368607B2 (en) * 2007-12-05 2013-02-05 Antennas Direct, Inc. Antenna assemblies with antenna elements and reflectors
US7865154B2 (en) * 2000-07-20 2011-01-04 Paratek Microwave, Inc. Tunable microwave devices with auto-adjusting matching circuit
US8744384B2 (en) 2000-07-20 2014-06-03 Blackberry Limited Tunable microwave devices with auto-adjusting matching circuit
US8064188B2 (en) 2000-07-20 2011-11-22 Paratek Microwave, Inc. Optimized thin film capacitors
WO2002009226A1 (fr) 2000-07-20 2002-01-31 Paratek Microwave, Inc. Dispositifs micro-ondes accordables a circuit d'adaptation auto-ajustable
DE10045634B4 (de) * 2000-09-15 2005-08-25 Hella Kgaa Hueck & Co. Resonante Antenne für eine Steuereinrichtung für ein Kraftfahrzeug und deren Verwendung
WO2003067707A1 (fr) * 2002-01-03 2003-08-14 Time Domain Corporation Antenne cadre a large bande
US6876334B2 (en) * 2003-02-28 2005-04-05 Hong Kong Applied Science And Technology Research Institute Co., Ltd. Wideband shorted tapered strip antenna
CN1765030B (zh) * 2003-04-28 2010-05-26 胡贝尔和茹纳股份公司 宽带天线装置
US7592958B2 (en) * 2003-10-22 2009-09-22 Sony Ericsson Mobile Communications, Ab Multi-band antennas and radio apparatus incorporating the same
US7515881B2 (en) * 2003-11-26 2009-04-07 Starkey Laboratories, Inc. Resonance frequency shift canceling in wireless hearing aids
US7710335B2 (en) * 2004-05-19 2010-05-04 Delphi Technologies, Inc. Dual band loop antenna
DE102004054015A1 (de) * 2004-11-09 2006-05-11 Robert Bosch Gmbh Planare Breitbandantenne
KR100724133B1 (ko) * 2005-10-11 2007-06-04 삼성전자주식회사 원격 모니터링을 위한 소형 액세서리
US9406444B2 (en) 2005-11-14 2016-08-02 Blackberry Limited Thin film capacitors
US7711337B2 (en) 2006-01-14 2010-05-04 Paratek Microwave, Inc. Adaptive impedance matching module (AIMM) control architectures
US8325097B2 (en) 2006-01-14 2012-12-04 Research In Motion Rf, Inc. Adaptively tunable antennas and method of operation therefore
US8125399B2 (en) * 2006-01-14 2012-02-28 Paratek Microwave, Inc. Adaptively tunable antennas incorporating an external probe to monitor radiated power
US7714676B2 (en) 2006-11-08 2010-05-11 Paratek Microwave, Inc. Adaptive impedance matching apparatus, system and method
US7535312B2 (en) 2006-11-08 2009-05-19 Paratek Microwave, Inc. Adaptive impedance matching apparatus, system and method with improved dynamic range
US8299867B2 (en) 2006-11-08 2012-10-30 Research In Motion Rf, Inc. Adaptive impedance matching module
US7813777B2 (en) * 2006-12-12 2010-10-12 Paratek Microwave, Inc. Antenna tuner with zero volts impedance fold back
US7917104B2 (en) 2007-04-23 2011-03-29 Paratek Microwave, Inc. Techniques for improved adaptive impedance matching
US8213886B2 (en) 2007-05-07 2012-07-03 Paratek Microwave, Inc. Hybrid techniques for antenna retuning utilizing transmit and receive power information
DE202007010239U1 (de) * 2007-07-24 2007-09-20 Rosenberger Hochfrequenztechnik Gmbh & Co. Kg Schleifenrichtkoppler
US7991363B2 (en) 2007-11-14 2011-08-02 Paratek Microwave, Inc. Tuning matching circuits for transmitter and receiver bands as a function of transmitter metrics
US7990335B2 (en) * 2007-12-05 2011-08-02 Antennas Direct, Inc. Antenna assemblies with antenna elements and reflectors
US11929562B2 (en) 2007-12-05 2024-03-12 Antennas Direct, Inc. Antenna assemblies with tapered loop antenna elements
US7639201B2 (en) * 2008-01-17 2009-12-29 University Of Massachusetts Ultra wideband loop antenna
US20090210035A1 (en) * 2008-02-20 2009-08-20 Daniel Gelbart System for powering medical implants
USD920962S1 (en) 2008-02-29 2021-06-01 Antennas Direct, Inc. Base stand for antenna
USD815073S1 (en) 2008-02-29 2018-04-10 Antennas Direct, Inc. Antenna
USD804459S1 (en) 2008-02-29 2017-12-05 Antennas Direct, Inc. Antennas
USD883265S1 (en) 2008-02-29 2020-05-05 Antennas Direct, Inc. Antenna
USD883264S1 (en) 2008-02-29 2020-05-05 Antennas Direct, Inc. Antenna
US8072285B2 (en) 2008-09-24 2011-12-06 Paratek Microwave, Inc. Methods for tuning an adaptive impedance matching network with a look-up table
US8067858B2 (en) * 2008-10-14 2011-11-29 Paratek Microwave, Inc. Low-distortion voltage variable capacitor assemblies
US8164529B2 (en) 2008-10-20 2012-04-24 Harris Corporation Loop antenna including impedance tuning gap and associated methods
US20100201578A1 (en) * 2009-02-12 2010-08-12 Harris Corporation Half-loop chip antenna and associated methods
US8472888B2 (en) 2009-08-25 2013-06-25 Research In Motion Rf, Inc. Method and apparatus for calibrating a communication device
JP5687421B2 (ja) * 2009-10-01 2015-03-18 小島プレス工業株式会社 車両用アンテナエレメントおよび車両用アンテナ
US9026062B2 (en) 2009-10-10 2015-05-05 Blackberry Limited Method and apparatus for managing operations of a communication device
US8576125B2 (en) * 2009-10-30 2013-11-05 Digi International Inc. Planar wideband antenna
US8803631B2 (en) 2010-03-22 2014-08-12 Blackberry Limited Method and apparatus for adapting a variable impedance network
WO2011133657A2 (fr) 2010-04-20 2011-10-27 Paratek Microwave, Inc. Procédé et appareil permettant de gérer l'interférence dans un dispositif de communication
US9070969B2 (en) * 2010-07-06 2015-06-30 Apple Inc. Tunable antenna systems
US9379454B2 (en) 2010-11-08 2016-06-28 Blackberry Limited Method and apparatus for tuning antennas in a communication device
US8712340B2 (en) 2011-02-18 2014-04-29 Blackberry Limited Method and apparatus for radio antenna frequency tuning
US8655286B2 (en) 2011-02-25 2014-02-18 Blackberry Limited Method and apparatus for tuning a communication device
US8626083B2 (en) 2011-05-16 2014-01-07 Blackberry Limited Method and apparatus for tuning a communication device
US8594584B2 (en) 2011-05-16 2013-11-26 Blackberry Limited Method and apparatus for tuning a communication device
US9769826B2 (en) 2011-08-05 2017-09-19 Blackberry Limited Method and apparatus for band tuning in a communication device
US20130214979A1 (en) * 2012-02-17 2013-08-22 Emily B. McMilin Electronic Device Antennas with Filter and Tuning Circuitry
US8948889B2 (en) 2012-06-01 2015-02-03 Blackberry Limited Methods and apparatus for tuning circuit components of a communication device
US9806420B2 (en) * 2012-06-12 2017-10-31 The United States Of America As Represented By Secretary Of The Navy Near field tunable parasitic antenna
US9853363B2 (en) 2012-07-06 2017-12-26 Blackberry Limited Methods and apparatus to control mutual coupling between antennas
US9246223B2 (en) 2012-07-17 2016-01-26 Blackberry Limited Antenna tuning for multiband operation
US9413066B2 (en) 2012-07-19 2016-08-09 Blackberry Limited Method and apparatus for beam forming and antenna tuning in a communication device
US9350405B2 (en) 2012-07-19 2016-05-24 Blackberry Limited Method and apparatus for antenna tuning and power consumption management in a communication device
US9362891B2 (en) 2012-07-26 2016-06-07 Blackberry Limited Methods and apparatus for tuning a communication device
US8963795B1 (en) * 2012-10-15 2015-02-24 L-3 Communications Corp. Wedge shaped scimitar antenna
EP2907196A4 (fr) * 2012-10-15 2016-06-08 Gapwaves Ab Agencement d'une antenne à mise à terre automatique
JP6030434B2 (ja) * 2012-12-17 2016-11-24 Ｎｅｃプラットフォームズ株式会社 アンテナ装置
US9374113B2 (en) 2012-12-21 2016-06-21 Blackberry Limited Method and apparatus for adjusting the timing of radio antenna tuning
US10404295B2 (en) 2012-12-21 2019-09-03 Blackberry Limited Method and apparatus for adjusting the timing of radio antenna tuning
CN103746168A (zh) * 2013-12-27 2014-04-23 青岛中科软件股份有限公司 板载PCB天线的325MHz射频模块
CN103746166B (zh) * 2013-12-27 2016-06-08 青岛中科软件股份有限公司 板载PCB天线的928MHz射频模块
CN103746175B (zh) * 2013-12-27 2016-06-08 青岛中科软件股份有限公司 板载PCB天线的2450MHz射频模块
US9438319B2 (en) 2014-12-16 2016-09-06 Blackberry Limited Method and apparatus for antenna selection
USD781825S1 (en) 2015-07-29 2017-03-21 Voxx International Corporation Antenna stand
US10224592B2 (en) 2015-07-29 2019-03-05 Voxx International Corporation Stand for planar antenna
US10128575B2 (en) 2015-09-02 2018-11-13 Antennas Direct, Inc. HDTV antenna assemblies
USD824884S1 (en) 2015-10-08 2018-08-07 Antennas Direct, Inc. Antenna element
US9761935B2 (en) 2015-09-02 2017-09-12 Antennas Direct, Inc. HDTV antenna assemblies
USD827620S1 (en) 2015-10-08 2018-09-04 Antennas Direct, Inc. Antenna element
USD811752S1 (en) 2015-10-08 2018-03-06 Antennas Direct, Inc. Picture frame antenna
EP3378123A4 (fr) * 2015-11-17 2019-06-19 Gapwaves AB Agencement d'antenne en noeud papillon montable en surface automatiquement mis à la terre, pétale d'antenne et procédé de fabrication
USD781826S1 (en) 2015-12-28 2017-03-21 Voxx International Corporation Antenna stand
DE102018218891B4 (de) 2018-11-06 2023-12-07 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Dreidimensionale Schleifen-Antennenvorrichtung
US11791558B2 (en) * 2021-08-23 2023-10-17 GM Global Technology Operations LLC Simple ultra wide band very low profile antenna
US12548912B2 (en) 2022-07-01 2026-02-10 Kabushiki Kaisha Tokai Rika Denki Seisakusho Metal plate antenna and antenna device
JP2025101848A (ja) * 2023-12-26 2025-07-08 Ｎｅｃプラットフォームズ株式会社 小型広帯域アンテナ
CN121035605A (zh) * 2025-10-31 2025-11-28 广州慧智微电子股份有限公司 一种片上天线

Family Cites Families (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3015101A (en) * 1958-10-31 1961-12-26 Edwin M Turner Scimitar antenna
US3618104A (en) * 1968-02-26 1971-11-02 Multronics Inc Broadband cornucopia-type antenna system
US3906507A (en) * 1974-03-27 1975-09-16 Lockheed Aircraft Corp Combination glideslope/localizer antenna for aircraft
HU181154B (en) * 1980-07-18 1983-06-28 Epitestudomanyi Intezet Shaped building unit and space limiting or dividing structure made of same as well as method for producing the shaped building unit
US4433336A (en) * 1982-02-05 1984-02-21 The United States Of America As Represented By The Secretary Of Commerce Three-element antenna formed of orthogonal loops mounted on a monopole
JP2870940B2 (ja) * 1990-03-01 1999-03-17 株式会社豊田中央研究所 車載アンテナ
US5294938A (en) * 1991-03-15 1994-03-15 Matsushita Electric Works, Ltd. Concealedly mounted top loaded vehicular antenna unit
US5521610A (en) 1993-09-17 1996-05-28 Trimble Navigation Limited Curved dipole antenna with center-post amplifier
DE69422022T2 (de) 1994-05-10 2000-08-03 Murata Mfg. Co., Ltd. Antenneneinheit
DE19514556A1 (de) 1995-04-20 1996-10-24 Fuba Automotive Gmbh Flachantennen-Anordnung
US5592182A (en) * 1995-07-10 1997-01-07 Texas Instruments Incorporated Efficient, dual-polarization, three-dimensionally omni-directional crossed-loop antenna with a planar base element
US5654724A (en) * 1995-08-07 1997-08-05 Datron/Transco Inc. Antenna providing hemispherical omnidirectional coverage
US5784032A (en) * 1995-11-01 1998-07-21 Telecommunications Research Laboratories Compact diversity antenna with weak back near fields
JP2957463B2 (ja) 1996-03-11 1999-10-04 日本電気株式会社 パッチアンテナおよびその製造方法
US6111549A (en) * 1997-03-27 2000-08-29 Satloc, Inc. Flexible circuit antenna and method of manufacture thereof

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO0036703A1 *

Also Published As

Publication number Publication date
DE59904250D1 (de) 2003-03-13
JP4414599B2 (ja) 2010-02-10
KR100724300B1 (ko) 2007-06-04
EP1138097B1 (fr) 2003-02-05
JP2002533002A (ja) 2002-10-02
KR20010081072A (ko) 2001-08-25
US6590541B1 (en) 2003-07-08
DE19857191A1 (de) 2000-07-06
WO2000036703A1 (fr) 2000-06-22

Similar Documents

Publication Publication Date Title
EP1138097B1 (fr) Demi-cadre
DE60102052T2 (de) Doppeltwirkende Antenne
DE69617947T2 (de) Gedruckte mehrband monopolantenne
DE602004002413T2 (de) Mehrband-Planarantenne
DE60023062T2 (de) Antennenkonstruktion
DE60225513T2 (de) Mehrfrequenzantenne
DE60109608T2 (de) Antenne und funkgerät mit einer derartigen antenne
DE69624300T2 (de) Antenne
DE60211316T2 (de) Antennenanordnung
DE60306513T2 (de) Antennenanordnung
DE69317235T2 (de) Wenig Raum beanspruchende, breitbandige Antenne mit zugehörigem Sendeempfänger
EP0965152B1 (fr) Antenne accordee
DE69633990T2 (de) Antenne
DE60019196T2 (de) Antennenstruktur
DE69604583T2 (de) Gedruckte mehrband-monopolantenne
EP1154518B1 (fr) Antenne intégrée pour téléphones portables
DE10038831B4 (de) Dualband- und Multiband-Antenne
DE69913962T2 (de) Mehrband-fahrzeugantenne
EP2693565B1 (fr) Emetteur électrique pour signaux radio polarisés verticalement
DE3486135T2 (de) Antenne fuer den mobilen telefonverkehr.
DE60128700T2 (de) Drahtloses funkgerät
DE2136759C2 (de) Antenne mit metallischem Rahmen und den Rahmen erregendem Unipol
EP1297590A1 (fr) Antenne fendue
DE60033140T2 (de) Mehrfrequenzband-Antenne
DE112004002469T5 (de) Mittels Schlitzes in der Karosseriepaneele verborgene Fahrzeugantenne

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 20010711

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

GRAG Despatch of communication of intention to grant

Free format text: ORIGINAL CODE: EPIDOS AGRA

17Q First examination report despatched

Effective date: 20020508

GRAG Despatch of communication of intention to grant

Free format text: ORIGINAL CODE: EPIDOS AGRA

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Designated state(s): DE FR GB IT SE

REG Reference to a national code

Ref country code: GB

Ref legal event code: FG4D

Free format text: NOT ENGLISH

REF Corresponds to:

Ref document number: 59904250

Country of ref document: DE

Date of ref document: 20030313

Kind code of ref document: P

REG Reference to a national code

Ref country code: SE

Ref legal event code: TRGR

GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)

Effective date: 20030513

ET Fr: translation filed
PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed

Effective date: 20031106

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: IT

Payment date: 20081223

Year of fee payment: 10

Ref country code: SE

Payment date: 20081222

Year of fee payment: 10

EUG Se: european patent has lapsed
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 20110107

Year of fee payment: 12

REG Reference to a national code

Ref country code: GB

Ref legal event code: 732E

Free format text: REGISTERED BETWEEN 20110127 AND 20110202

REG Reference to a national code

Ref country code: FR

Ref legal event code: TP

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20091210

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 20101221

Year of fee payment: 12

REG Reference to a national code

Ref country code: DE

Ref legal event code: R081

Ref document number: 59904250

Country of ref document: DE

Owner name: BLAUPUNKT ANTENNA SYSTEMS GMBH & CO. KG, DE

Free format text: FORMER OWNER: ROBERT BOSCH GMBH, 70469 STUTTGART, DE

Effective date: 20110315

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20091211

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20110218

Year of fee payment: 12

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 20111210

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

Effective date: 20120831

REG Reference to a national code

Ref country code: DE

Ref legal event code: R119

Ref document number: 59904250

Country of ref document: DE

Effective date: 20120703

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20120703

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20111210

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20120102