DE3134081A1 - Spiral antenna - Google Patents

Spiral antenna

Info

Publication number
DE3134081A1
DE3134081A1 DE19813134081 DE3134081A DE3134081A1 DE 3134081 A1 DE3134081 A1 DE 3134081A1 DE 19813134081 DE19813134081 DE 19813134081 DE 3134081 A DE3134081 A DE 3134081A DE 3134081 A1 DE3134081 A1 DE 3134081A1
Authority
DE
Germany
Prior art keywords
antenna
spiral
reflector space
circular
spiral antenna
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
DE19813134081
Other languages
German (de)
Other versions
DE3134081C2 (en
Inventor
Wilhelm 2390 Flensburg Jacobsen
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.)
Airbus Defence and Space GmbH
Original Assignee
Licentia Patent Verwaltungs 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 Licentia Patent Verwaltungs GmbH filed Critical Licentia Patent Verwaltungs GmbH
Priority to DE19813134081 priority Critical patent/DE3134081A1/en
Publication of DE3134081A1 publication Critical patent/DE3134081A1/en
Application granted granted Critical
Publication of DE3134081C2 publication Critical patent/DE3134081C2/de
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q17/00—Devices for absorbing waves radiated from an antenna; Combinations of such devices with active antenna elements or systems
    • 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
    • H01Q9/16—Resonant antennas with feed intermediate between the extremities of the antenna, e.g. centre-fed dipole
    • H01Q9/26—Resonant antennas with feed intermediate between the extremities of the antenna, e.g. centre-fed dipole with folded element or elements, the folded parts being spaced apart a small fraction of operating wavelength
    • H01Q9/27—Spiral antennas

Abstract

In the case of a spiral antenna having a circular-cylindrical reflector space, circular-cylindrical bodies consisting of material which absorbs electromagnetic radiation are arranged in the reflector space, concentrically with respect to the antenna axis, in order to tune the antenna over a wide frequency range. As an alternative for this, a body consisting of dielectric material, in the form of a circular cone having an envelope line gradient of 45 DEG and whose cone tip is located at the centre of the antenna spiral can also be arranged in the reflector space.

Description

SpiralantenneSpiral antenna

Die Erfindung betrifft eine Spiralantenne mit kreiszylindrischem Reflektorraum hinter der Antennenspirale.The invention relates to a spiral antenna with a circular cylindrical reflector space behind the antenna spiral.

Derartige Antennen sind allgemein bekannt und finden bevorzugt Anwendung als Speisestrahler. Vorteilhaft an diesen Spiralantennen ist ihre kompakte Bauweise. Nachteilig an den bisher bekannt gewordenen Antennenausführungen ist die geringe Frequenzbandbreite, innerhalb derer eine solche Antenne betrieben werden kann.Such antennas are generally known and are preferably used as a dining spotlight. The advantage of these spiral antennas is their compact design. The disadvantage of the antenna designs that have become known up to now is that they are low Frequency bandwidth within which such an antenna can be operated.

Aufgabe der vorliegenden Erfindung ist es, eine Spiralantenne in der beschriebenen Art anzugeben, welche unter Beibehaltung der Vorteile kompakter Bauweise und preiswerte Herstellungsmöglichkeit in einem breiten Frequenzbereich betrieben werden kann.The object of the present invention is to provide a spiral antenna in the Specify the type described, which while maintaining the advantages of compact design and inexpensive manufacturing option operated in a wide frequency range can be.

Erfindungsgemäß wird diese Aufgabe bei einer Spiralantenne mit kreiszylindrischem Reflektorraum gelöst durch die kennzeichnenden Merkmale des Anspruchs 1 oder des Anspruchs 2. Vorteilhafte Ausgestaltungen sind in den Unteransprüchen 3 und 4 beschrieben. Die Erfindung ist nachfolgend unter Bezugnahme auf die Abbildungen noch veranschaulicht Bei der in FIG. 1 dargestellten erfindungsgemäßen Spiralantenne ist die die Antennenspirale tragende Frontplatte 9 an dem Antennengehäuses 1 befestigt und schließt den durch das Gehäuse gebildeten Reflektorraum ab. In den Reflektorraum eingesetzt sind die Körper 5, 6, 7 und 8 aus absorbierendem Material. Die Körper haben eine kreiszylindrische Form und sind konzentrisch zur Antennenachse A angeordnet. Der Abstand D der Körper zur Ebene der Antennenspirale ist gleich dem Halbmesser R der Körper. Explizit eingezeichnet ist dies für den Körper 6. Aus der Vorschrift, daß der Abstand von der Antennenspirale gleich dem Halbmesser sein soll ergibt sich, daß die Körper mit kleinerem Halbmesser näher an der Antennenspirale angeordnet sind.According to the invention, this object is achieved in the case of a spiral antenna with a circular cylindrical Reflector space solved by the characterizing features of the claim 1 or claim 2. Advantageous refinements are set out in the subclaims 3 and 4. The invention is described below with reference to the figures illustrated in FIG. 1 illustrated spiral antenna according to the invention the front plate 9 carrying the antenna spiral is fastened to the antenna housing 1 and closes off the reflector space formed by the housing. In the reflector room the bodies 5, 6, 7 and 8 made of absorbent material are used. The body have a circular cylindrical shape and are arranged concentrically to the antenna axis A. The distance D of the body to the plane of the antenna spiral is equal to the radius R the body. This is explicitly shown for the body 6. From the rule, that the distance from the antenna spiral should be equal to the radius results, that the bodies with a smaller radius are arranged closer to the antenna spiral are.

Die Anordnung mehrerer solcher Körper aus absorbierendem Material kann auch als Aufteilung des Empfangsfrequenzbereiches der Antenne in mehrere Teilfrequenzbereiche aufgefaßt werden, wobei die einzelnen Teilfrequenzbereiche lückenlos aneinander anschließen und die Antenne dadurch auf die einzelnen Teilfrequenzbereiche abgestimmt ist, daß der Radius der Körper jeweils #/4 der Mittenfrequenz des jeweiligen Frequenzteilbereichs ist. Die Bemessung der einzelnen Körper kann daher auch aus einer Aufteilung des Empfangsfrequenzbereiches abgeleitet werden, wobei für die Aufteilung beispielsweise eine äquidistante Stufung oder eine logarithmische Stufung vorgesehen werden kann.The arrangement of several such bodies made of absorbent material can also be used as a division of the reception frequency range of the antenna into several sub-frequency ranges are understood, with the individual sub-frequency ranges seamlessly connected to one another connect the antenna to the individual sub-frequency ranges is that the radius of the body is in each case # / 4 of the center frequency of the respective frequency sub-range is. The dimensioning of the individual bodies can therefore also be derived from a division of the Reception frequency range are derived, for example, for the division an equidistant graduation or a logarithmic graduation can be provided.

Eine andere erfindungsgemäße Lösung der Aufgabe ist in FIG. 2 in den wesentlichen Teilen skizziert. Der Körper 10 besteht aus elektromagnetische Strahlung absorbierendem Material und hat die Form eines Kreiskegels mit 450 Mantelliniensteigung. Die Spitze des Kegels liegt im Zentrum der Antennenspirale.Another inventive solution to the problem is shown in FIG. 2 in the essential parts outlined. The body 10 consists of electromagnetic radiation absorbent material and has the shape of a circular cone with a surface inclination of 450. The tip of the cone is in the center of the antenna spiral.

Die Speisung der Antenne erfolgt über die Leitung 4.The antenna is fed via line 4.

Die Antenne ist durch besondere an sich bekannte Maßnahmen, die nicht Gegenstand der vorliegenden Erfindung sind, über den gesamten Empfangsfrequenzbereich angepaßt. Die Wandungen des Antennengehäuses sind zur Vermeidung störender Reflexionen ebenfalls mit einer dünnen Lage absorbierenden Materials 2 ausgelegt. Zur Justierung der Körper wird das Innere des Gehäuses vorteilhafterweise mit einem mechanisch stabilen, nicht absorbierendem Dielektrikum 3 ausgefüllt. Besonders geeignet hierfür sind Hartschaumstoffe, wie beispielsweise Polyurethan-Hartschaum, der aufgrund seines geringen Raumgewichtes das Gewicht der Antenne kaum verändert und aufgrund der geringen Dielektrizitätskonstanten von 8 1 1,01 die elektrischen Eigenschaften praktisch nicht beeinflußt.The antenna is by special measures known per se that are not The present invention relates to the entire receiving frequency range customized. The walls of the antenna housing are to avoid disturbing reflections also laid out with a thin layer of absorbent material 2. For adjustment the body is the interior of the housing advantageously with a mechanical stable, non-absorbent dielectric 3 filled. Particularly suitable for this are rigid foams, such as rigid polyurethane foam, due to its low density the weight of the antenna hardly changed and due to the low Dielectric constant of 8 1 1.01 makes the electrical properties practical unaffected.

LeerseiteBlank page

Claims (4)

Patentansprüche Spiralantenne mit kreiszylindrischem Reflektorraum, gekennzeichnet durch mehrere kreiszylindrische Körper (5, 6, 7, 8) aus elektromagnetische Strahlung absorbierendem Material, die so dimensioniert und konzentrisch zur Antennenachse (A) nacheinander so angeordnet sind, daß der Radius (R) eines Körpers gleich ist seinem Abstand (D) von der Antennenspiralenebene.Claims spiral antenna with circular cylindrical reflector space, characterized by several circular cylindrical bodies (5, 6, 7, 8) made of electromagnetic Radiation absorbing material that is dimensioned and concentric to the antenna axis (A) are arranged one after the other so that the radius (R) of one body is the same its distance (D) from the antenna spiral plane. 2. Spiralantenne mit kreiszylindrischem Reflektorraum, gekennzeichnet durch einen im Reflektorraum angeordneten, aus elektromagnetische Strahlung absorbierendem Material bestehenden Körper (10) in Form eines Kreiskegels mit 45° Mantelliniensteigung, dessen Spitze in der Mitte der Antennenspirale liegt (FIG. 2).2. Spiral antenna with circular cylindrical reflector space, marked by one arranged in the reflector space and absorbing electromagnetic radiation Material existing body (10) in the form of a circular cone with 45 ° surface line slope, whose tip is in the middle of the antenna spiral (FIG. 2). 3. Spiralantenne nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß der neben den Körpern im Reflektorraum verleibende Raum mit einem mechanisch stabilen, nicht absorbierenden Dielektrikum (3) ausgefüllt ist.3. spiral antenna according to claim 1 or 2, characterized in that the space next to the bodies in the reflector room with a mechanically stable, non-absorbent dielectric (3) is filled. 4. Spiralantenne nach Anspruch 3, dadurch gekennzeichnet, daß das Dielektrikum ein Hartschaumstoff ist.4. spiral antenna according to claim 3, characterized in that the Dielectric is a rigid foam.
DE19813134081 1981-08-28 1981-08-28 Spiral antenna Granted DE3134081A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE19813134081 DE3134081A1 (en) 1981-08-28 1981-08-28 Spiral antenna

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19813134081 DE3134081A1 (en) 1981-08-28 1981-08-28 Spiral antenna

Publications (2)

Publication Number Publication Date
DE3134081A1 true DE3134081A1 (en) 1983-03-10
DE3134081C2 DE3134081C2 (en) 1991-01-17

Family

ID=6140342

Family Applications (1)

Application Number Title Priority Date Filing Date
DE19813134081 Granted DE3134081A1 (en) 1981-08-28 1981-08-28 Spiral antenna

Country Status (1)

Country Link
DE (1) DE3134081A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2777093B1 (en) * 2011-11-07 2019-01-09 NovAtel Inc. Directional slot antenna with a dielectric insert

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3192531A (en) * 1963-06-12 1965-06-29 Rex E Cox Frequency independent backup cavity for spiral antennas
US3381371A (en) * 1965-09-27 1968-05-07 Sanders Associates Inc Method of constructing lightweight antenna
US3555554A (en) * 1969-03-03 1971-01-12 Sylvania Electric Prod Cavity-backed spiral antenna with mode suppression
US3686674A (en) * 1971-01-04 1972-08-22 Bendix Corp Microwave spiral antenna structure
US3745585A (en) * 1972-03-29 1973-07-10 Gte Sylvania Inc Broadband plane antenna with log-periodic reflectors
US4085406A (en) * 1976-10-22 1978-04-18 International Business Machines Corporation Spiral antenna absorber system
US4087821A (en) * 1976-07-14 1978-05-02 Harris Corporation Polarization controllable lens
DE2441638B2 (en) * 1973-08-31 1978-11-30 Thomson-Csf, S.A., Paris Broadband antenna with a spiral arranged near a reflector

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3192531A (en) * 1963-06-12 1965-06-29 Rex E Cox Frequency independent backup cavity for spiral antennas
US3381371A (en) * 1965-09-27 1968-05-07 Sanders Associates Inc Method of constructing lightweight antenna
US3555554A (en) * 1969-03-03 1971-01-12 Sylvania Electric Prod Cavity-backed spiral antenna with mode suppression
US3686674A (en) * 1971-01-04 1972-08-22 Bendix Corp Microwave spiral antenna structure
US3745585A (en) * 1972-03-29 1973-07-10 Gte Sylvania Inc Broadband plane antenna with log-periodic reflectors
DE2441638B2 (en) * 1973-08-31 1978-11-30 Thomson-Csf, S.A., Paris Broadband antenna with a spiral arranged near a reflector
US4087821A (en) * 1976-07-14 1978-05-02 Harris Corporation Polarization controllable lens
US4085406A (en) * 1976-10-22 1978-04-18 International Business Machines Corporation Spiral antenna absorber system

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
JP 50-10049 A2 In: Englischsprachige Abstracts ungeprüfter, offengelegter Japanischer Patent- anmeldungen (JP-A2 Patentdokumente) *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2777093B1 (en) * 2011-11-07 2019-01-09 NovAtel Inc. Directional slot antenna with a dielectric insert

Also Published As

Publication number Publication date
DE3134081C2 (en) 1991-01-17

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Legal Events

Date Code Title Description
8101 Request for examination as to novelty
8105 Search report available
8110 Request for examination paragraph 44
8127 New person/name/address of the applicant

Owner name: TELEFUNKEN SYSTEMTECHNIK GMBH, 7900 ULM, DE

D2 Grant after examination
8364 No opposition during term of opposition
8327 Change in the person/name/address of the patent owner

Owner name: DEUTSCHE AEROSPACE AG, 80804 MUENCHEN, DE

8320 Willingness to grant licences declared (paragraph 23)
8327 Change in the person/name/address of the patent owner

Owner name: DAIMLER-BENZ AEROSPACE AKTIENGESELLSCHAFT, 80804 M

8339 Ceased/non-payment of the annual fee