EP0422431A2 - Dispositif à diversité angulaire - Google Patents

Dispositif à diversité angulaire Download PDF

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Publication number
EP0422431A2
EP0422431A2 EP90118209A EP90118209A EP0422431A2 EP 0422431 A2 EP0422431 A2 EP 0422431A2 EP 90118209 A EP90118209 A EP 90118209A EP 90118209 A EP90118209 A EP 90118209A EP 0422431 A2 EP0422431 A2 EP 0422431A2
Authority
EP
European Patent Office
Prior art keywords
wave
waveguide
type
wave type
polarization
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
EP90118209A
Other languages
German (de)
English (en)
Other versions
EP0422431B1 (fr
EP0422431A3 (en
Inventor
Ulrich Dr.Ing . Mahr
Karl-Heinz Mierzwiak
Günter Dr.Ing. Mörz
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
ANT Nachrichtentechnik 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, ANT Nachrichtentechnik GmbH filed Critical Robert Bosch GmbH
Publication of EP0422431A2 publication Critical patent/EP0422431A2/fr
Publication of EP0422431A3 publication Critical patent/EP0422431A3/de
Application granted granted Critical
Publication of EP0422431B1 publication Critical patent/EP0422431B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q21/00—Antenna arrays or systems
    • H01Q21/24—Combinations of antenna units polarised in different directions for transmitting or receiving circularly and elliptically polarised waves or waves linearly polarised in any direction
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q25/00—Antennas or antenna systems providing at least two radiating patterns
    • H01Q25/04—Multimode antennas

Definitions

  • An angle diversity method is known from EP 0 061 576 B1, for example, which is based on the multi-mode principle.
  • the excitation horn of the Antenna feeding system of signals which reach the receiving antenna from a main direction of propagation, excites symmetrical wave types, and signals, which spread through detours, excite waves with an antisymmetric field distribution.
  • a mode coupler belonging to the antenna feed system separates these different wave types, and a selection receiver derives an optimal reception signal from them.
  • this selection receiver contains a combiner (for example in the HF or IF level) which forms a best signal from both signals.
  • the invention is based on the object of specifying an angular diversity method of the type mentioned at the outset which, in the case of multipath propagation in a radio field, enables the transmitted signals to be received with a low frequency of errors.
  • Such antisymmetric wave types can be, for example, the H20 wave type and a wave type resulting from the superimposition of an H11 and an E11 wave.
  • the superposition of the H11 and E11 wave types should be such that there is a field extinction in the polarization direction of the H20 wave type and a field strength addition occurs in the orthogonal polarization direction.
  • the previously mentioned wave types excited in the exciter horn and / or in the waveguide transition 3 - these are the H01, H11, E11, H10 and H20 wave types - have the multi-type inputs on the exciter horn side Waveguide branch 2 the field states shown in FIGS. 2a, 3a, 4a and 5a.
  • the multi-type waveguide branch 2 designed as a rectangular waveguide, is divided at one end into two partial waveguides by a separating plate 7, which runs parallel to the narrow waveguide sides and is guided in grooves 8 in the broad waveguide sides.
  • a waveguide 41, 42 designed as a polarization switch is connected to each of these partial waveguides of the multi-type waveguide branch 2.
  • Each of the two waveguides 41 and 42 is provided with two outlets 411, 412 and 421, 422 which are arranged one behind the other and are rotated by 90 ° with respect to one another.
  • the two waveguides 41 and 42 designed as polarization switches are arranged directly next to one another and separated from one another by a common wall 43. This creates a very compact arrangement, referred to here as a double polarization switch 4.
  • the wave types propagating in the multi-type waveguide branch 2, the field states of which prevail at the exciter end show FIGS. 2a, 3a, 4a and 5a, take in the partial waveguides created by the separating plate 7 those in FIGS. 2b, 3b, 4b and 5b shown field states.
  • the H01 wave type (FIG. 2a) in the two partial waveguides is divided into two vertically polarized, in-phase waves (FIG. 2b).
  • the wave created by superimposing the H11 and the E11 wave type (FIG. 3a) is divided into two antiphase, vertically polarized waves (FIG. 3b) by the separating plate 7 in the two partial waveguides.
  • the H10 wave type (FIG. 4a) merges in the two partial waveguides on both sides of the separating plate 7 into two in-phase, horizontally polarized waves (FIG. 4b).
  • the H20 wave type (FIG. 5a) is divided by the separating plate 7 into two waves which are polarized in the horizontal direction and are in opposite phases (FIG. 5b).
  • the following wave types can then be tapped from the outputs 411, 412, 421 and 422 of the double polarization switch 4 coupled to the multi-type waveguide branch 2.
  • the field energy components of the H01 and the wave type resulting from the superimposition of the H11 and E11 waves originating from one of the two partial waveguides of the multi-type waveguide branch 2 are available.
  • the energy components of the same wave types originating from the other partial waveguide can be tapped off at the output 421 of the other waveguide 42.
  • the output 412 of the waveguide 41 supplies the field energy components of the H10 wave type and the H20 wave type originating from one of the two partial waveguides of the multi-type waveguide branch 2.
  • the entire field energy of the horizontally polarized H01 wave can be tapped off at gate 53 - the so-called E-gate - of the series parallel junction 5 (magic T), and at gate 54 - the so-called H-gate - the entire field energy is available to that wave Available, which resulted from the superposition of the H11 and E11 waves.
  • the gates 612 and 622 are coupled to the outputs 412 and 422 of the double polarization switch 4 from the second series parallel branch 6.
  • a diversity receiver of a known type derives an optimal reception signal from the waves available at gates 53, 54, 63 and 64 of the two series parallel branches 5 and 6.
  • the separating plate 7 used in the multi-type waveguide branch 2 is provided on its end face pointing into the interior of the waveguide with a pin 9 which is oriented in the direction of wave propagation.
  • This pin 9 has an influence on the H11 and E11 shaft types.
  • the length of the pin 9 is selected so that there is a phase overlap of the H11 and E11 shaft types. Its length is approximately 1/8 of the waveguide wavelength of these two types of wave. 1 that the pin 9 is provided with a cross-sectional jump to implement a transformation stage.
  • a further transformation stage can be formed by the partition plate 7 in the multi-type waveguide branch 2 with the waveguide wall 43 of the double polarization switch 4 separating the two waveguides 41 and 42.
  • tuning pins are then to be arranged in front of the front end face of the separating plate 7 at a distance of approximately 3/4 of the waveguide wavelength for the basic wave type.
  • Inductive effects of the separating plate 7 on the H10 and H20 shaft types can be compensated for by tuning pins in the broad sides of the waveguide 2.
  • tuning pins for the basic wave type in front of the front end face of the separating plate 7 at a distance of half and at a distance of an entire waveguide wavelength.
  • Tuning pins are to be arranged in a known manner where the wave type to be influenced has its field maximum.
  • the cross-sectional adaptation taking place in the waveguide transition 3 from the rectangular exciter horn 1 to the rectangular waveguide of the multi-type waveguide branch 2 takes place continuously.
  • the cross-sectional deformation takes place within the waveguide transition 3 in the E and H planes differently, and in such a way that in this waveguide transition 3 further higher wave types are excited (e.g. H30, H03, H12, E12).
  • Overlaying these higher wave types with the symmetrical basic wave type (H10, H01) creates an approximately rotationally symmetrical excitation radiation diagram with little cross polarization.
  • the continuous cross-sectional expansion is carried out at the same time in such a way that, with a short overall length in both polarizations, very good reflection behavior is achieved over a broad band.
  • the antenna feed system described above is advantageously used in a double reflector antenna with a parabolic main reflector HR and an elliptical sub-reflector SR.
  • the geometry of this double reflector antenna is designed so that, according to the geometric optics, a distortion-free representation of the excitation radiation diagram, consisting of the main radiation lobe HK and the spread secondary radiation lobe NK, is ensured in the antenna aperture. 1 is installed in the double reflector antenna in such a way that the vertical polarization in the radiation field of the antenna is assigned to the H01 wave (cf. FIG. 2a).

Landscapes

  • Variable-Direction Aerials And Aerial Arrays (AREA)
  • Waveguide Aerials (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Radio Transmission System (AREA)
  • Input Circuits Of Receivers And Coupling Of Receivers And Audio Equipment (AREA)
  • Apparatus For Radiation Diagnosis (AREA)
  • Control Of Motors That Do Not Use Commutators (AREA)
  • Table Devices Or Equipment (AREA)
EP90118209A 1989-10-09 1990-09-21 Dispositif à diversité angulaire Expired - Lifetime EP0422431B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3933683 1989-10-09
DE3933683 1989-10-09

Publications (3)

Publication Number Publication Date
EP0422431A2 true EP0422431A2 (fr) 1991-04-17
EP0422431A3 EP0422431A3 (en) 1991-12-18
EP0422431B1 EP0422431B1 (fr) 1996-12-27

Family

ID=6391116

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90118209A Expired - Lifetime EP0422431B1 (fr) 1989-10-09 1990-09-21 Dispositif à diversité angulaire

Country Status (3)

Country Link
EP (1) EP0422431B1 (fr)
AT (1) ATE146907T1 (fr)
DE (1) DE59010617D1 (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0575788A1 (fr) * 1992-06-26 1993-12-29 Siemens Aktiengesellschaft Lanceur multimode XPD-optimisé pour diversité d'angle
DE4326824A1 (de) * 1993-08-10 1995-02-16 Siemens Ag Hohlleiterschaltung mit zwei Polarisationsweichen
US5821906A (en) * 1993-04-30 1998-10-13 Thomson-Csf Rear feed source for reflector antenna
RU2124254C1 (ru) * 1996-09-17 1998-12-27 Акционерное общество открытого типа Научно-исследовательский институт радиоэлектронных систем Акционерного общества "Ленинец-Холдинг" Облучающее устройство
RU2380804C1 (ru) * 2008-08-04 2010-01-27 Государственное унитарное предприятие "Конструкторское бюро приборостроения" Моноимпульсный облучатель
DE102013011651A1 (de) * 2013-07-11 2015-01-15 ESA-microwave service GmbH Antennen-Speisesystem im Mikrowellenbereich für Reflektorantennen

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2236728C1 (ru) * 2003-05-05 2004-09-20 ОАО "НИИ Приборостроения им. В.В. Тихомирова" Моноимпульсный облучатель

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2626925C3 (de) * 1976-06-16 1981-01-08 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt Verfahren zum Ausgleich von Ausbreitungsschwankungen bei Nachrichtenübertragungssystemen
DE3111731A1 (de) * 1981-03-25 1982-10-14 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt Mikrowellenuebertragungseinrichtung mit mehrmodendiversity-kombinationsempfang
DE3604431A1 (de) * 1986-02-13 1987-08-20 Licentia Gmbh Modenkoppler fuer monopulsanwendungen

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0575788A1 (fr) * 1992-06-26 1993-12-29 Siemens Aktiengesellschaft Lanceur multimode XPD-optimisé pour diversité d'angle
US5821906A (en) * 1993-04-30 1998-10-13 Thomson-Csf Rear feed source for reflector antenna
DE4326824A1 (de) * 1993-08-10 1995-02-16 Siemens Ag Hohlleiterschaltung mit zwei Polarisationsweichen
RU2124254C1 (ru) * 1996-09-17 1998-12-27 Акционерное общество открытого типа Научно-исследовательский институт радиоэлектронных систем Акционерного общества "Ленинец-Холдинг" Облучающее устройство
RU2380804C1 (ru) * 2008-08-04 2010-01-27 Государственное унитарное предприятие "Конструкторское бюро приборостроения" Моноимпульсный облучатель
DE102013011651A1 (de) * 2013-07-11 2015-01-15 ESA-microwave service GmbH Antennen-Speisesystem im Mikrowellenbereich für Reflektorantennen

Also Published As

Publication number Publication date
EP0422431B1 (fr) 1996-12-27
ATE146907T1 (de) 1997-01-15
DE59010617D1 (de) 1997-02-06
EP0422431A3 (en) 1991-12-18

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