EP0019775A1 - Dispositif d'antenne, en particulier d'antenne Cassegrain - Google Patents

Dispositif d'antenne, en particulier d'antenne Cassegrain Download PDF

Info

Publication number: EP0019775A1
Authority: EP; European Patent Office
Prior art keywords: radome; antenna arrangement; arrangement according; wall; reflector
Prior art date: 1979-05-22
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.): Ceased

Application number

EP80102544A

Other languages

German (de)

English (en)

Inventor

Anton Dipl.-Ing. Brunner

Wolfgang Dipl.-Ing. Löw

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.)

Siemens AG

Siemens Corp

Original Assignee

Siemens AG

Siemens Corp

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.)

1979-05-22

Filing date

1980-05-08

Publication date

1980-12-10

Family has litigation

First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=6071458&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0019775(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.

1980-05-08 Application filed by Siemens AG, Siemens Corp filed Critical Siemens AG

1980-12-10 Publication of EP0019775A1 publication Critical patent/EP0019775A1/fr

Status Ceased legal-status Critical Current

Images

Classifications

- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q19/00—Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic
- H01Q19/02—Details
- H01Q19/021—Means for reducing undesirable effects
- H01Q19/026—Means for reducing undesirable effects for reducing the primary feed spill-over

Definitions

the invention relates to an antenna arrangement, in particular a Cassegrain antenna arrangement, consisting of a main reflector, a preferred primary feed radiator, preferably formed by a horn, and a subreflector arranged in front of it, which is held by means of a plastic hood (radome) enveloping the primary feed radiator.
a Cassegrain antenna arrangement consisting of a main reflector, a preferred primary feed radiator, preferably formed by a horn, and a subreflector arranged in front of it, which is held by means of a plastic hood (radome) enveloping the primary feed radiator.
radome plastic hood
the invention is based on the object of specifying a solution for an antenna arrangement of the type described above, by means of which the radiation and thus the undesired secondary lobes and the effect of the diffractive sub-reflector edge are reduced.
This object is achieved according to the invention in such a way that the radome is provided in the region of unwanted side lobes caused by overexposure with metallic parts which reduce the overexposure, consisting of metal pins attached to the radome, metallic strips applied to the radome internally or externally or laterally on Radome or catch reflector arranged aperture.
FIG. 1 the arrangement of a rotationally symmetrical Cassegrain antenna is shown in a schematic side view without polarization rotation.
a guide designed as a waveguide 2 is guided through the apex of a substantially parabolic main reflector 1 to a primary horn radiator 3.
the horn emitter 3 is encased by a bottle-shaped plastic hood 4 (radome).
the horn emitter 3 is arranged in the area near the bottle neck, while in the area of the bottom surface there is the subreflector 5, which can also be formed by the bottom surface of the bottle-shaped plastic hood itself, which is provided with a metallization layer on the inside for this purpose.
the useful radiation N which emanates from the horn 3, runs to the subreflector 5, is reflected by the latter to the main reflector 1 and is emitted after being reflected again into the free space, with solid lines, the overexposure U is indicated by a dashed arrow .
the overexposure U coming from the horn, extends outside the area of the sub-reflector 5 and reaches directly into the free space.
the 2 shows a Cassegrain antenna arrangement with polarization rotation.
the horn 3 is used directly in an opening of the main reflector 1.
the lattice-shaped subreflector 6, which allows the polarization rotated at the main reflector to pass through, is connected to the main reflector 1 via a plastic sleeve 7 (radome).
the useful radiation N is emitted into the free space after double reflection at the subreflector 6 and main reflector 1, while the overexposure U in the area between the reflectors 1, 6 passes through the radome 7 directly into the free space.
the critical polarization perpendicular to the diffractive edge lies horizontally.
the overexposure can be reduced by means of an embodiment as shown in FIG. 3.
the Cassegrain antenna corresponds to the form shown in FIG. 1, the main reflector being omitted to simplify the illustration.
metal pins 8 are arranged on the inside of the radome 4 in the region of possible radiation, wherein they are inserted into the radome 4 with such an inclination that they are parallel to the reflected beam of the useful radiation which passes through at the installation site. As a result, they do not influence the useful radiation N, but they represent a reflecting obstacle for the overexposure Ü and also for the guide wave R running in the radome.
pin length 1 There are optimal values for pin length 1, for example slightly larger than ⁇ / 2. Pen spacing and the shape and size of the pen field offer possibilities to control the effect for certain angular ranges with a minimum number of pens.
FIG. 4 shows a top view of the subreflector of a Cassegrain antenna, which has side diaphragms 9 to reduce the overexposure.
These diaphragms the effect of which is based on a compensation of the edge diffraction, are provided in the event that the radiation of the vertical polarization is also to be reduced.
the relatively small diaphragms have a width b on the order of ⁇ / 3 and a height h on the order of 3 ⁇ .
FIG. 5 and 6 show a Cassegrain antenna in a schematic partial representation, in which metal strips are applied to the radome to reduce the radiation, the dimensions of which can be similar to that of the pin fields. Their effect on the overexposure corresponds to that of the pin fields. One of them caused an effect on the useful radiation reflected by the subreflector in the form of a profit reduction of about In many cases, 0.1 to 0.2 dB with a side lobe suppression in the considered angular range of 5 dB can be permitted.
the attachment of metallic strips on the radome represents a solution that is particularly simple in terms of production technology.
the metallic strips are best placed on the inside, but in the case of a stronger line wave in the radome it is best placed on the outside, as is the case with the embodiments according to FIGS. 5 and 6 is. 5, the strips 10 of different lengths are applied lying next to each other in the longitudinal direction on the radome 4. This arrangement is provided for horizontal polarization, while for vertical polarization metal strips 11 are applied next to one another in the circumferential direction in the relevant angular ranges on the radome.
Strips and pens can also be attached in the area of the vertical plane, in addition or alternatively, above and below, pens with special bearing modes distributed over the entire circumference.

Landscapes

Aerials With Secondary Devices (AREA)
Details Of Aerials (AREA)

EP80102544A 1979-05-22 1980-05-08 Dispositif d'antenne, en particulier d'antenne Cassegrain Ceased EP0019775A1 (fr)

Applications Claiming Priority (2)

Application Number	Priority Date	Filing Date	Title
DE2920781		1979-05-22
DE19792920781 DE2920781C2 (de)	1979-05-22	1979-05-22	Reflektorantenne, bestehend aus einem Hauptreflektor, einem Primärstrahler und einem Subreflektor

Publications (1)

Publication Number	Publication Date
EP0019775A1 true EP0019775A1 (fr)	1980-12-10

Family

ID=6071458

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
EP80102544A Ceased EP0019775A1 (fr)	1979-05-22	1980-05-08	Dispositif d'antenne, en particulier d'antenne Cassegrain

Country Status (3)

Country	Link
EP (1)	EP0019775A1 (fr)
JP (1)	JPS55154803A (fr)
DE (1)	DE2920781C2 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
EP0152221A2 (fr) *	1984-02-09	1985-08-21	THE GENERAL ELECTRIC COMPANY, p.l.c.	Station terrienne pour systèmes de télécommunications par satellite
GB2165998A (en) *	1984-02-09	1986-04-23	Gen Electric Plc	A dual reflector antenna
CN113131210A (zh) *	2021-04-13	2021-07-16	西北核技术研究所	一种高功率微波用正馈卡塞格伦天线

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
US4833484A (en) *	1984-02-09	1989-05-23	The General Electric Company, P.L.C.	Earth terminal for satellite communication
DE4002913A1 (de) *	1990-02-01	1991-08-08	Ant Nachrichtentech	Doppelreflektor-antenne
WO2000019559A1 (fr) *	1998-09-30	2000-04-06	Anritsu Corporation	Antenne plane et procede de fabrication correspondant

Citations (5)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
DE1120526B (de) *	1960-07-14	1961-12-28	Siemens Ag	Richtantenne fuer sehr kurze elektromagnetische Wellen
GB973583A (en) *	1962-04-11	1964-10-28	Post Office	Improvements in or relating to microwave aerials
DE1541598A1 (de) *	1966-09-30	1969-07-24	Siemens Ag	Richtantenne fuer sehr kurze elektromagnetische Wellen
FR2101144A1 (fr) *	1970-08-28	1972-03-31	Comp Generale Electricite
DE2715796A1 (de) *	1977-04-07	1978-10-12	Siemens Ag	Antennenanordnung, insbesondere cassegrain-antennenanordnung, und verfahren zu deren herstellung

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
DE1296221B (de) *	1965-09-30	1969-05-29	Siemens Ag	Richtantenne, bestehend aus einem ueber einen Fangreflektor ausgeleuchteten Hauptreflektor
FR1584348A (fr) *	1968-07-16	1969-12-19
US3611391A (en) *	1970-03-27	1971-10-05	Us Army	Cassegrain antenna with dielectric guiding structure
DE2444057C3 (de) *	1974-09-14	1981-07-30	Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt	Dielektrische Schutzhaube für Subreflektor und Erregerhorn einer Cassegrain-Antenne
JPS534751U (fr) *	1976-06-30	1978-01-17
JPS5919009B2 (ja) *	1977-11-09	1984-05-02	積水化成流工業株式会社	発泡シ−トによる深絞り成形方法および装置

1979
- 1979-05-22 DE DE19792920781 patent/DE2920781C2/de not_active Expired
1980
- 1980-05-08 EP EP80102544A patent/EP0019775A1/fr not_active Ceased
- 1980-05-21 JP JP6657480A patent/JPS55154803A/ja active Pending

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
DE1120526B (de) *	1960-07-14	1961-12-28	Siemens Ag	Richtantenne fuer sehr kurze elektromagnetische Wellen
GB973583A (en) *	1962-04-11	1964-10-28	Post Office	Improvements in or relating to microwave aerials
DE1541598A1 (de) *	1966-09-30	1969-07-24	Siemens Ag	Richtantenne fuer sehr kurze elektromagnetische Wellen
FR2101144A1 (fr) *	1970-08-28	1972-03-31	Comp Generale Electricite
DE2715796A1 (de) *	1977-04-07	1978-10-12	Siemens Ag	Antennenanordnung, insbesondere cassegrain-antennenanordnung, und verfahren zu deren herstellung

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
IEE INTERNATIONAL CONFERENCE ON RADAR AND FUTURE, 23-25 Oktober 1973, Conference Publication 105, London, GB, O. DAHLSJO: "A low side lobe cassegrain antenna", Seiten 408-411 * Das ganze Dokument * *

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
EP0152221A2 (fr) *	1984-02-09	1985-08-21	THE GENERAL ELECTRIC COMPANY, p.l.c.	Station terrienne pour systèmes de télécommunications par satellite
GB2165998A (en) *	1984-02-09	1986-04-23	Gen Electric Plc	A dual reflector antenna
EP0152221A3 (fr) *	1984-02-09	1986-11-05	THE GENERAL ELECTRIC COMPANY, p.l.c.	Station terrienne pour systèmes de télécommunications par satellite
CN113131210A (zh) *	2021-04-13	2021-07-16	西北核技术研究所	一种高功率微波用正馈卡塞格伦天线

Also Published As

Publication number	Publication date
JPS55154803A (en)	1980-12-02
DE2920781C2 (de)	1984-07-12
DE2920781A1 (de)	1980-11-27

Publication	Publication Date	Title
DE69612779T2 (de)	2002-08-29	Antennensystem mit gesteuerter Ablenkung
DE112021002225T5 (de)	2023-01-26	Dielektrische Linse und elektromagnetische Vorrichtung mit derselben
DE69330034T2 (de)	2001-09-27	Wellenleiterlinse und Verfahren zu deren Herstellung
DE60107939T2 (de)	2005-12-15	Reflektorantenne mit gemeinsamer apertur und verbessertem zuführungsentwurf
DE2812903C2 (de)	1986-01-09	Antenne mit einem Primärstrahler, einem Hauptreflektor und einem zu diesem exzentrischen Hilfsreflektor
DE2850492A1 (de)	1979-05-31	Antennenreflektor mit parabolisch- elliptischer reflektorflaeche
DE202022107107U1 (de)	2023-08-08	Integrierte Basisstationsantenne
EP0021251B1 (fr)	1984-02-01	Antenne radar du type Pillbox avec antenne d'interrogation intégrée
DE69015460T2 (de)	1995-05-18	Ineinandergeschachtelte Anordnung von Hornstrahlern.
EP0019775A1 (fr)	1980-12-10	Dispositif d'antenne, en particulier d'antenne Cassegrain
DE2810483C2 (de)	1982-09-30	Antenne mit einem Schlitze aufweisenden Speisehohlleiter und einer mit diesem einen Winkel einschließenden Strahlerzeile
EP0284883B1 (fr)	1992-01-15	Antenne directive micro-ondes à deux réflecteurs
DE2821699C2 (de)	1983-10-27	Antenne mit wenigstens zwei voneinander unabhängigen Strahlungquellen
DE19848722B4 (de)	2010-05-20	Mikrowellen-Reflektorantenne
DE1296221B (de)	1969-05-29	Richtantenne, bestehend aus einem ueber einen Fangreflektor ausgeleuchteten Hauptreflektor
DE202022102307U1 (de)	2022-11-16	Mehrbandantenne
DE2954351C2 (de)	1986-07-17	Reflektorantenne
EP0021193A1 (fr)	1981-01-07	Système d'antennes combiné
DE60120909T2 (de)	2007-02-08	Doppeltreflektor-Antenne mit Ablenker
EP0976173B1 (fr)	2012-09-26	Antenne a hyperfrequences a reflecteur
DE2928370C2 (de)	1982-04-15	Antennenanordnung zur strahlungspegelmäßigen Überdeckung aller Nebenzipfel einer scharf bündelnden Hauptantenne
DE2444057A1 (de)	1976-03-25	Dielektrische schutzhaube fuer eine mikrowellenantenne
DE69506928T2 (de)	1999-08-12	Mehrstrahlantenne für das gleichzeitige Empfangen/Aussenden gleicher Frequenzsignalen aus/in einer oder mehreren koplanaren Richtungen
EP0135742B1 (fr)	1989-03-22	Antenne omnidirectionnelle
DE2551545A1 (de)	1977-05-26	Drehsymmetrische cassegrain-antenne

Legal Events

Date	Code	Title	Description
1980-10-14	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
1980-12-10	AK	Designated contracting states	Designated state(s): AT BE CH DE FR GB IT LU NL SE
1981-07-15	17P	Request for examination filed	Effective date: 19810505
1986-12-03	STAA	Information on the status of an ep patent application or granted ep patent	Free format text: STATUS: THE APPLICATION HAS BEEN REFUSED
1987-01-21	18R	Application refused	Effective date: 19831006
2007-08-08	RIN1	Information on inventor provided before grant (corrected)	Inventor name: LOEW, WOLFGANG, DIPL.-ING. Inventor name: BRUNNER, ANTON, DIPL.-ING.