EP0225460A2 - Antenne d'émission-réception pour ondes courtes et moyennes - Google Patents

Antenne d'émission-réception pour ondes courtes et moyennes Download PDF

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Publication number
EP0225460A2
EP0225460A2 EP86114804A EP86114804A EP0225460A2 EP 0225460 A2 EP0225460 A2 EP 0225460A2 EP 86114804 A EP86114804 A EP 86114804A EP 86114804 A EP86114804 A EP 86114804A EP 0225460 A2 EP0225460 A2 EP 0225460A2
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EP
European Patent Office
Prior art keywords
conductor section
conductor
transmitting
receiving antenna
antenna according
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.)
Withdrawn
Application number
EP86114804A
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German (de)
English (en)
Other versions
EP0225460A3 (fr
Inventor
Oskar J. Kufner
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Individual
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Individual
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Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of EP0225460A2 publication Critical patent/EP0225460A2/fr
Publication of EP0225460A3 publication Critical patent/EP0225460A3/fr
Withdrawn legal-status Critical Current

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Classifications

    • 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
    • H01Q9/32—Vertical arrangement of element
    • H01Q9/36—Vertical arrangement of element with top loading
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/27—Adaptation for use in or on movable bodies
    • H01Q1/34—Adaptation for use in or on ships, submarines, buoys or torpedoes
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q5/00—Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements
    • H01Q5/30—Arrangements for providing operation on different wavebands
    • H01Q5/307—Individual or coupled radiating elements, each element being fed in an unspecified way
    • H01Q5/342—Individual or coupled radiating elements, each element being fed in an unspecified way for different propagation modes
    • H01Q5/357—Individual or coupled radiating elements, each element being fed in an unspecified way for different propagation modes using a single feed point
    • H01Q5/364—Creating multiple current paths
    • H01Q5/371—Branching current paths
    • 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
    • H01Q9/44—Resonant antennas with a plurality of divergent straight elements, e.g. V-dipole, X-antenna; with a plurality of elements having mutually inclined substantially straight portions

Definitions

  • the invention relates to a transmitting or receiving antenna, in particular for the short and / or medium wave range, consisting of a vertical conductor section with a capacitive load or coupling to earth in the upper region.
  • a transmitting or receiving antenna in particular for the short and / or medium wave range, consisting of a vertical conductor section with a capacitive load or coupling to earth in the upper region.
  • Such an antenna is i.a. on page 338 of the book "Antenna Book” by Karl Rothammel, 8th edition, Telekosmos-Verlag, Franckh'sche Verlag Stuttgart.
  • the capacitive load is referred to there as a roof capacity and, according to the designs there, can consist of individual wires or of flat metal structures. The page quoted explains that the capacitive load at the maximum voltage forms an additional capacitance to earth.
  • the antenna therefore represents a resonant circuit, this resonant circuit having a resonant frequency.
  • the antenna When operating the antennas, efforts are made to design the antenna so that its resonance frequency is equal to the transmission frequency or has a harmonic value. If this condition is met, there are only effective resistors and no reactive resistors so that the greatest possible power can be radiated from the antenna. If blank components are present, some of the power is reflected back into the feed line, which leads to undesirable losses.
  • the roof capacity offers the possibility of resonating an antenna that is mechanically too short.
  • the capacitively loaded antenna cannot be viewed as a compromise solution, since the roof capacitance increases the radiation resistance compared to an unloaded vertical radiator, thus achieving better efficiency.
  • the antennas described in the cited text passage are only effective for increasing the spatial electric fields.
  • the present invention has for its object to further develop an antenna of the type mentioned in such a way that a high radiation resistance is achieved with a simple mechanical structure, the antenna can be used over a wide frequency band and an increase in the magnetic field is achieved.
  • coaxial power supply with tuning at the transmitter should be made possible without expensive remote tuning at the antenna base.
  • the solution to this problem according to the invention is characterized by at least one further conductor section, preferably a plurality of conductor sections, which is connected to the vertical conductor section or which are connected to the respectively preceding conductor section, the conductor sections forming an unclosed frame which surrounds a surface, and additional capacitive couplings (to earth) on at least some of the total conductor sections.
  • An antenna which is relatively simple in practice but nevertheless has a high degree of efficiency is distinguished in that the or each further conductor section or at least some of the further conductor sections is or are connected to the preceding conductor section in such a way that a free end piece is formed is, wherein the free end piece or the free end pieces forms or form the capacitive coupling or additional capacitive couplings.
  • the mechanical length of the longest conductor section including its free end should be less than ⁇ / 4 (preferably less than ⁇ / l0) at the highest intended operating frequency.
  • the conductor sections are preferably rectilinear.
  • the conductor sections can easily be designed as simple rods or ropes, with ropes made of stainless steel having a diameter in the range from 2 to 5 mm being preferred for boat antennas.
  • the main advantages are that they can be easily held in the intended position by tensile forces and are essentially immobile in this position, which benefits the transmission or reception behavior of the antenna in the coordinated state.
  • a first, tried and tested preferred embodiment is characterized in that two conductor sections are provided, the second conductor section running obliquely downward from the connection to the vertical conductor section and thereby having an angle in the range of 30 ° forms to 60 °, preferably 45 ° with the vertical conductor section, that the obliquely downward conductor section ends above the grounded environment and that the free end piece of the vertical conductor section has a length in the range of 20 to 60%, in particular about 25% of the has the entire length of the vertical conductor section.
  • the conductor section running obliquely downwards should preferably end approximately 2 m above the environment which is considered to be grounded.
  • an advantageous further development of the antenna is characterized by a third conductor section which, starting from the lower region of the conductor section running obliquely downwards, extends in the general direction of the vertical conductor section, however, ends before this, whereby this third conductor section is preferably inclined in the horizontal direction or slightly upwards.
  • the free end piece of the second conductor section formed by the connection of the third conductor section to the obliquely downwardly extending second conductor section should have a length of 10 to 30, in particular approximately 20% of the total length of the second conductor section.
  • a reception signal strength in the range S6 to S7 was measured with this structure and with a length L3 of the further conductor section of 4 m and with a length of the lower region mentioned of 20% of the total length of the conductor section running obliquely downwards.
  • a particularly preferred embodiment is characterized in that the obliquely downward conductor section simultaneously serves as an anchoring strand for the serves vertical conductor section, wherein an insulator is provided between the lower end of the obliquely downward conductor section and an anchoring member anchored in the ground or cooperating with a fixed structure.
  • the conductor section running obliquely downwards fulfills a double function in that it is additionally used to stabilize the position of the vertical conductor section.
  • the vertical conductor section which is preferably designed as a rod, can be mechanically stabilized with two further ropes. These additional cables are attached to the vertical conductor section via insulators and are therefore not part of the transmitting or receiving parts of the antenna. Since the capacitive loading of the vertical conductor section is formed by an extension of this preferably rod-shaped section, no mechanical problems arise here, since the continuation is carried by the vertical conductor section and does not require additional mechanical stabilization. It is important that lediglish that the three antenna sections are relatively rigid and therefore immovably tensioned so as not to change the resonance conditions in the tuned state.
  • the mechanical lengths of the vertical conductor section, the obliquely downward conductor section and the third conductor section can advantageously be in a ratio of II: II: 4 to one another.
  • Another antenna according to the invention which has given good results in practical tests, is characterized in that the last conductor section from the connection point on the penultimate conductor section obliquely down towards the vertical conductor section shows, but does not reach this and forms an angle in the range of 0-30 ° with the horizontal, and that two wires or rods forming part of the capacitive coupling are arranged at the end of the last conductor section opposite the penultimate conductor section.
  • the horizontally arranged rods or wires preferably form an angle in the range from 30 ° to 60 °, preferably 45 °, with the last conductor section, pointing in the direction of the connection point of the last conductor section on the penultimate conductor section.
  • the second conductor section preferably forms an angle with the vertical conductor section of approximately 60 °, but this angle can be varied in the range from 45 ° to 90 ° without significantly impairing the efficiency.
  • connection is made via a coax line to the transmitter or receiver, according to the invention, at the base of the vertical conductor section.
  • the transmitter or receiver is coupled to the antenna via a coaxial cable, a "matchbox" at the base of the antenna being able to be tuned remotely.
  • a "matchbox” at the base of the antenna being able to be tuned remotely.
  • tuning the antenna over a very wide frequency range is only possible if either two different "matchboxes” are used or a special switchover (from a high-pass filter to a low-pass filter) is carried out. Both known options are cumbersome and cause high acquisition costs.
  • the invention provides to provide an adaptation circuit between the transmitter or receiver and the antenna, in particular for use with the broadband antenna already described above, the coupling to the antenna via a transformer (reducing the proportion of losses in the circuit components ) and a coaxial cable, and which is characterized in that a series connection of a tuning capacitor and a variable coil is connected to the secondary winding of the transformer, whereby a resonant circuit determined by these components is formed, that the connection point between the tuning capacitor and the variable Coil is connected via a capacitance selection stage to the inner conductor of the coaxial cable, and that a second capacitance selection stage is connected on the one hand to the inner conductor of the coaxial cable between the latter and the first capacitance selection stage and on the other hand with the ground line between the transformer and the shield of the coaxial cable, is connected, the selection of the ratio of the respectively selected capacitances C A and C B of the first and second capacitance selection stages being used to adapt to the antenna over a wide frequency range, while maintaining the quality of the
  • capacitors used in the capacitance selection stages are designed to be extremely low-loss (HF high-voltage ceramic. Transmitting capacitors with connections of sufficiently high cross-section).
  • a measuring device for the standing wave ratio is provided, as usual.
  • connection to ground is preferably secured by a braid lying in the water (band made of copper braid), which is connected to ground via a capacitor in order to avoid corrosion damage. In this way, expensive gold earthing plates can be effectively replaced.
  • Spark protection should also be arranged between the inner conductor of the coaxial cable and ground (e.g. electrode spacing of a spark plug).
  • the antenna described so far is primarily designed for use in the shortwave and mediumwave range, it is also possible according to the invention to use this type of antenna for significantly shorter wavelengths if the mechanical lengths are chosen accordingly.
  • two antennas having the geometry described are assembled to form a type of inverted V-shaped dipole antenna (FIG. 4), two parallel, but spaced vertical conductor sections being present, and the two antennas being operated 180 ° out of phase with one another.
  • the lower ends of the two vertical conductor sections are connected to respective ends of a secondary winding of a transformer transmitting the signal.
  • the antennas according to the invention can advantageously be built on boats or radio cars, but can also be used at very short wavelengths in aerospace bodies. In the latter and similar applications, the geometric information used in the claims should always be related to the environment serving as the mass.
  • All versions of the claimed mechanically shortened antenna have in common that the parts forming the capacitances are arranged and dimensioned around the frame in such a way that they lead to the highest possible currents through the individual conductor sections, so that through the non-closed frame, which is regarded as an inductive loop a high magnetic field can be built up and thus a high electric field can be built up by the unloaded free cable ends as well as a high magnetic field.
  • the antenna according to the invention consists of a vertical conductor section 10 with a total length L1.
  • This vertical ladder section is rod-shaped and fastened at its lower end at 11 on the deck of the boat.
  • At the vertical conductor section is about 1/4 of the total length L1 of the vertical conductor cut under its upper end, an obliquely downward conductor section l2 connected, which forms an angle ⁇ of 45 ° with the vertical conductor section.
  • the upper part l3 of the vertical conductor section l0 that is to say the part which lies above the connection point l4 with the conductor section l2 running obliquely downward, forms a capacitive coupling with the grounded environment, ie with the boat itself and with the sea water surrounding the boat or for installation on land versus earth (differences between sea and land cannot be measured).
  • the obliquely downward conductor section l2 has a length L2 and is connected at its lower end to an anchoring part l6 via an insulator l5.
  • the anchoring part 16 is firmly connected to the boat hull at its lower end.
  • the point l5 is about 1 m above the mass environment.
  • the anchoring part l6 performs a holding function for the vertical conductor section l0 via the conductor section l2 running obliquely downwards, this holding function being supported by two further cables l7 and l8 acting on the vertical conductor section.
  • the cables l7 and l8 are connected to the vertical conductor section via insulators l9, 20 and therefore do not form any radiating parts of the antenna.
  • connection point 2l a further line section 22 with the length L3 approaches the vertical conductor section l0 from the second section running obliquely downwards.
  • the further line section 22 does not reach the vertical conductor section 10.
  • the connection point 2l between the further conductor section 22 and the obliquely downward conductor l2 divides the obliquely downward conductor section into lower and upper regions 23, 24, the lower region 23 has a length of L / 5 and the upper region 22 accordingly has a length of 4L / 5.
  • the lower region 23 of the obliquely downward conductor section 12 in turn forms a capacitive coupling between the antenna and the surroundings.
  • the further conductor section 22 also leads to an increase in the capacitive coupling of the antenna to the earth.
  • the length L1 of the vertical conductor section 11 m, the length of the obliquely downward conductor section L2 was 13 m and the length of the further conductor section L3 was 4 m.
  • the isolator l5 l m was placed above the grounded metal parts of the boat. It was also found that the angle ⁇ should be in the range from 30 to 60 ° in order to achieve optimal results. Increasing the angle ⁇ beyond 45 ° did not lead to any further improvement in the antenna efficiency. Increasing the length L2 of the obliquely downward conductor section l2 by approximately 1.4 times the length of the vertical conductor section from the base point ll to the connection point l4 did not lead to any significant improvement in efficiency.
  • the conductor sections 10, 12, 22 form an unclosed frame which surrounds the surface 9. The capacitive coupling of the sections of l3, 23 and 22 essentially determine the antenna current in l0 and l2.
  • the distance between the further conductor section 22 and ground is somewhat critical, the exact position of this conductor also depends on the ambient conditions and can be varied between the limit values 22 'and 22 ⁇ shown.
  • the further line section forms an angle of 120 ° with the vertical. In the 22 ⁇ position, this angle is reduced to approximately 90 °.
  • the circuit shown in FIG. 3 is used at an operating frequency in the range from approximately 1.5 to 30 MHz.
  • the output of the transmitter 25 is connected to the two ends 26, 27 of the primary winding of a transformer 28 with a conversion ratio of approximately 1: 4.
  • the usual measuring device for the standing wave ratio can be seen at 29, but it is instead of the usual place on the antenna base 11 between the transmitter 25 and the primary winding of the transformer 28.
  • the secondary winding of the transformer is grounded at one end 3l and at her other end 30 connected to one terminal of a variable capacitor 32.
  • the other terminal of this capacitor 32 is connected via the switching arm 33 of a rotary switch 34 to the inner conductor 35 of the coaxial feed line 36.
  • the inner conductor 35 is connected at the base 11 of the antenna according to the invention.
  • the outer conductor 37 of the coaxial feed line which extends to the antenna base, is connected to the grounded output terminal 3l of the transmitter 25.
  • a conductive braid (ground strap) 39 leads into the water via a capacitor 38 for galvanic isolation, in order to ensure that a high-quality ground connection is present.
  • a tuning coil 4 is between the second terminal of the variable capacitor 32 and ground.
  • the fine tuning between transmitter and antenna is carried out by simultaneous adjustment of the variable capacitor 32 and the variable coil 4l with the aid of the display of the measuring device for the standing wave ratio (there is only an optimal, clear setting of L / C at a selected value of C a : C B ).
  • the radio operator is very familiar with such processes since they are common in conventional radio devices, although conventional adaptation circuits themselves are designed differently.
  • the two capacitance selection stages 42 and 43 are of particular importance in the matching circuit according to the invention.
  • the capacity selection stage 42 consists of the rotary switch 34 and three capacitors 44, 45, 46 which can be selected by means of the rotatable switching arm 33 of the rotary switch.
  • the first capacitance level lies between the second terminal of the variable capacitor 32 and the inner conductor 35 of the coaxial cable 36.
  • the capacitance selection stage 43 lying between water and the inner conductor 35 consists of a rotary switch 47 and two capacitors 48, 49 or an open-circuit terminal 5l, which can be selected by means of the rotary arm 52 of the rotary switch.
  • the second capacitance selection stage 43 is connected on the one hand to the inner conductor 35 of the coaxial cable 36 between the latter and the first capacitance selection stage and on the other hand connected to the ground line.
  • the two capacity selection stages 42 and 43 enable remote tuning on the transmitter.
  • the transmitter itself is connected to the antenna via a coaxial cable from e.g. 12 m in length and the adapter circuit described can be used over a frequency range from the limit wave (approximately 1.5 MHz) to approximately 25 MHz, without having to be exchanged for another adapter circuit and without the tuning capacitor 32 or the tuning coil 4l to reach other C (32) and L (4l) values.
  • the capacitors of the capacitance selection stages 42 and 43 are extremely low loss and e.g. have solder tabs at least 3 mm wide (they must be lossless and must not get hot during operation).
  • the system is protected by a spark gap 53 of approximately 1.5 to 2 mm. This serves as lightning protection or as a safeguard against mis-tuning.
  • the capacitor 38 can be omitted if there is no risk of corrosion.
  • the rotary arm 52 of the rotary switch 47 is at the terminal 5l, ie the capacity selection stage is ineffective, since the terminal 5l does not allow a connection to the inner conductor.
  • the rotary arm 33 of the first capacitance selection stage can be placed on a terminal that is directly connected to the second terminal of the variable capacitor 32, as shown in FIG. 3. In this position, the selected capacity C A of the capacity selection stage 42 is zero.
  • the antenna has too high an impedance at higher frequencies.
  • This impedance value can be transformed down to a lower value by selecting a favorable ratio from the selected capacitance C A of the selection stage 42 to the selected capacitance C B of the stage 43 will.
  • By presetting the above-mentioned ratio it is possible that in the resonant state the necessary resonant circuit capacitance C of the capacitor 32 is small over the entire bandwidth and thus the quality rises (favorable LC ratio).
  • a commercially available coaxial cable with the designation RG 2l3U was used for the circuit described above. This cable has an attenuation at 10 MHz of 2 dB / 100 m.
  • the grounding point (rope end or gold plate or ground binder) is at the antenna end. All devices on the transmitter are also grounded to the coaxial screen on the transmitter side. In this case, the "lip test" is successful, even with a transmitter power of over 200 watts; i.e. disturbing HF on the cable sheath on the transmission side could not be measured with the described circuit even with sensitive measuring devices.
  • spark protector 53 with a spark gap of approximately 1 mm in length between the inner conductor 35 and ground.
  • the spark gap 4l ensures that the coaxial cable is not damaged in the event of an incorrect mismatch or a thunderstorm.
  • FIG. 4 shows a modified embodiment of the previous antenna structure described here, in which two basic antennas are combined to form a type of greatly shortened inverted V-dipole antenna.
  • the antenna is symmetrical on the two sides of level 63.
  • Each half consists of a first vertical conductor section 64, a second conductor section 65, a third conductor section 66 and a fourth conductor section 67.
  • the second conductor section 65 is connected to the first conductor section such that the free end piece 68 is formed.
  • the further free end pieces 69 and 70 are formed in a corresponding manner.
  • the four conductor sections 64 to 67 form an unclosed frame which surrounds a surface 71.
  • the fourth conductor section 67 does not extend back to the vertical conductor section 64.
  • the free end pieces 68 to 70 and the fourth conductor section 64 form capacitive couplings to the environment 72, which is considered to be grounded, or to the other dipole half.
  • the two lower ends of the vertical conductor sections 64 are connected to the respective ends of the secondary winding 73 of a transformer.
  • the transmit or receive signal is fed via the transformer in the antenna or received by the antenna.
  • the two vertical conductor sections carry signals that are out of phase with each other, namely by 180 °.
  • Fig. 4 also shows that the free end pieces can be angled relative to the respective conductor sections.
  • FIG. 5 shows a side view of an antenna which is designed according to the invention and is likewise constructed on a boat in accordance with the antenna of FIG. 1.
  • the antenna according to FIG. 5 is very similar to the antenna according to FIG. 1, the parts that are identical or essentially identical are identified by the same reference numerals. For the sake of brevity, these parts are not dealt with particularly here.
  • the antenna according to FIG. 5 is the one that runs obliquely downwards Conductor section l2 directed somewhat flatter downward, so that the angle between the vertical conductor section and the obliquely downward-running conductor section l2 is approximately 60 ° in the present case.
  • connection point 2l is higher, about 4m above the boat deck, so that the inductance is increased considerably.
  • line section l2 ' With a length of about 1.5 m vertically downwards. This vertically downward conductor section l2 'then stops at the junction 2l'.
  • an insulator l5' is provided at position 2l 'and a tensioning rope l6' leads from this insulator l5 'to the boat deck.
  • Another conductor section 22 then leads from the junction 2l 'away towards the vertical conductor section l0, at the same time it runs obliquely downwards and includes an angle with the horizontal of approximately l5 °.
  • the conductor section 22 adjacent to the conductor section 10 which is also designed as a rope and can be tensioned by means of an insulator and a tensioning rope (not shown)
  • there are two further short horizontal conductor sections 22a and 22b which are either transverse to the direction of the conductor section 22 can be arranged, as shown in solid lines, but preferably form an angle of 45 ° with this and show in the general direction of the insulator 2l ', as indicated by dashed lines.
  • the conductor sections 22a and 22b here lie in a horizontal plane and each have a length of approximately 80 cm.
  • the length of the conductor section 22 is 4m in this example, that of the conductor section l2 'is approximately l.5 m.
  • the other dimensions correspond to those of the example in FIG. 1.

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  • Details Of Aerials (AREA)
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EP86114804A 1985-11-08 1986-10-24 Antenne d'émission-réception pour ondes courtes et moyennes Withdrawn EP0225460A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3539733 1985-11-08
DE19853539733 DE3539733A1 (de) 1985-11-08 1985-11-08 Eine sende- bzw. empfangsantenne, insbesondere fuer den kurz- und/oder mittelwellenbereich

Publications (2)

Publication Number Publication Date
EP0225460A2 true EP0225460A2 (fr) 1987-06-16
EP0225460A3 EP0225460A3 (fr) 1987-09-30

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EP86114804A Withdrawn EP0225460A3 (fr) 1985-11-08 1986-10-24 Antenne d'émission-réception pour ondes courtes et moyennes

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EP (1) EP0225460A3 (fr)
DE (1) DE3539733A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4027234A1 (de) * 1990-08-29 1992-03-12 Aeromaritime Systembau Gmbh Schiffsantenne
WO2009146326A1 (fr) * 2008-05-27 2009-12-03 Mp Antenna Ensemble antenne polarisante à bande multiple améliorée
US8717250B2 (en) 2008-05-27 2014-05-06 Mp Antenna Ltd Enhanced band multiple polarization antenna assembly
EP3972053A4 (fr) * 2019-06-13 2022-05-25 Mitsubishi Electric Corporation Dispositif d'antenne

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10284147B2 (en) * 2016-12-15 2019-05-07 Nxp Usa, Inc. Doherty amplifiers and amplifier modules with shunt inductance circuits that affect transmission line length between carrier and peaking amplifier outputs

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE453994C (de) * 1927-12-28 Schiffswerft Memel Lindenau & Antennenanordnung, insbesondere fuer Schiffszwecke
DE731312C (de) * 1935-01-12 1943-02-05 Lorenz C Ag Antennengebilde mit vorzugsweise allseitiger Bodenstrahlung fuer Rundfunkzwecke
US2167735A (en) * 1936-03-17 1939-08-01 Mackay Radio & Telegraph Co Antenna
GB581567A (en) * 1941-11-03 1946-10-17 Internat Marine Radio Company Improvements relating to transmitting aerials
DE1624431U (de) * 1950-12-08 1951-06-14 Karst Fa Robert Stabantenne mit einem die antennenkapazitaet veraendernden querteil.
US3189906A (en) * 1961-05-24 1965-06-15 John J Kulik Shipboard conical antenna with conductive support mast
DE2062110A1 (de) * 1970-12-17 1972-06-29 Licentia Gmbh Antenne in Form eines Monopol-Strahlers
FR2231125B1 (fr) * 1973-05-21 1977-09-02 Tacussel Maurice

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4027234A1 (de) * 1990-08-29 1992-03-12 Aeromaritime Systembau Gmbh Schiffsantenne
WO2009146326A1 (fr) * 2008-05-27 2009-12-03 Mp Antenna Ensemble antenne polarisante à bande multiple améliorée
US7916097B2 (en) 2008-05-27 2011-03-29 Mp Antenna Enhanced band multiple polarization antenna assembly
US8717250B2 (en) 2008-05-27 2014-05-06 Mp Antenna Ltd Enhanced band multiple polarization antenna assembly
EP3972053A4 (fr) * 2019-06-13 2022-05-25 Mitsubishi Electric Corporation Dispositif d'antenne

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DE3539733A1 (de) 1987-05-14
EP0225460A3 (fr) 1987-09-30

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