EP1263084A2 - Schlitzantenne - Google Patents
Schlitzantenne Download PDFInfo
- Publication number
- EP1263084A2 EP1263084A2 EP02007611A EP02007611A EP1263084A2 EP 1263084 A2 EP1263084 A2 EP 1263084A2 EP 02007611 A EP02007611 A EP 02007611A EP 02007611 A EP02007611 A EP 02007611A EP 1263084 A2 EP1263084 A2 EP 1263084A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- slot
- waveguide
- dimension
- slot antenna
- polarizer
- 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- Withdrawn
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Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q13/00—Waveguide horns or mouths; Slot antennas; Leaky-waveguide antennas; Equivalent structures causing radiation along the transmission path of a guided wave
- H01Q13/10—Resonant slot antennas
Definitions
- the invention relates to a slot antenna according to the preamble of claim 1.
- slot antennas rectangular or web waveguides are used to guide an electromagnetic one Wave and to excite one in a first wall (broadside) of the Waveguide formed slot for the purpose of emitting part of the Shaft used.
- the direction of polarization ie the direction of the electric field vector in the far field of the emitted wave, is determined by the direction of the slot, as shown in FIG. 1.
- the far electric field is perpendicular to the slot plane, namely as an E y component.
- the waveguide which is identified by the reference number 1, is designed as a rectangular waveguide.
- the slot 2 In order to rotate the polarization, either the slot 2 must be rotated according to the prior art, or a polarizer grating known in antenna technology must be attached over the slot 2.
- the invention is based on a slot antenna which is known per se and has an in a longitudinally extending feed waveguide for guiding an electromagnetic Shaft and at least one in a first wall of the feed waveguide formed slot for emitting part of the guided in the feed waveguide electromagnetic wave, means for rotating the direction of polarization of the electromagnetic wave radiated from the slit are provided.
- the object of the invention is to provide a slot antenna with which a continuous and continuously rotating the polarization direction of those radiated from the slit electromagnetic wave is possible and the simple and inexpensive can be produced.
- a slot antenna with one in a longitudinal direction extending feed waveguide for guiding an electromagnetic wave and at least one slot formed in a broad side of the feed waveguide Radiation of an electromagnetic wave created.
- the slot is surrounded on the outside of the feed waveguide by an arrangement by means of the direction of polarization of the electromagnetic radiation emitted by the slot Shaft is rotated.
- the slot in the longitudinal direction of the feed waveguide is formed and the arrangement surrounding the slot is a right-angled polarizer waveguide, with its one opening with the Broad side of the feed waveguide is connected and one at its other opening Has aperture over which excited by the slot in the polarizer waveguide Waveguide wave is emitted and so aligned with respect to the slot is that a transverse axis of the polarizer waveguide makes an angle with the Forms the longitudinal axis of the slot, the angle representing that angle the polarization of those emitted from the slot into the polarizer waveguide electromagnetic wave is rotated.
- a major advantage of the slot antenna according to the invention is that it is simple can be manufactured without having to accept additional loss of damping.
- the polarizer waveguide in the direction of one (first) Transverse axis a first dimension and in the direction of the other (second) transverse axis has a second dimension, the first dimension being larger and the second dimension less than half the free space wavelength ⁇ / 2 of the emitted electromagnetic Radiation is.
- the polarizer waveguide a first dimension in the direction of the first transverse axis and in the direction of its second transverse axis has a second dimension, both the first dimension as well as the second dimension larger than half the free space wavelength ⁇ / 2 the radiated electromagnetic radiation.
- any "Elliptical" polarization of the emitted electromagnetic radiation is achieved become.
- both basic modes H 10 and H 01 of the polarizer waveguide are excited to the same extent.
- additional means for phase shifting are provided in order to shift the orthogonally polarized oscillation modes of the polarization waveguide against one another, in particular with a shift of the orthogonally polarized oscillation modes H 10 and H 01 through 90 ° relative to one another, there is a purely circular polarization of the emitted electromagnetic radiation.
- the means for polarization-dependent or mode-dependent phase shift are known in the prior art.
- the polarizer waveguide preferably has a length H which is greater than a quarter of the free space wavelength ⁇ / 4 of the emitted electromagnetic radiation.
- a sufficiently large attenuation of the cross polarization (H 01 wave) for the useful polarization (H 10 wave) is brought about.
- the bandwidth of the emission coupling can be influenced in a targeted manner and varied within wide limits.
- a substantial extension of the length H of the polarizer waveguide compared to a quarter of the free space ⁇ / 4 means an extension beyond what is necessary to suppress cross-polarization.
- the one or more formed in the broad side of the feed waveguide Slits running lengthways and in the center line of the feed waveguide are trained.
- the or the broadside formed slots in the longitudinal direction and against the center line of the Feed waveguide are designed to be offset (offset slots).
- the feed waveguide is designed as a web waveguide.
- the slot antenna as a group antenna with many similar, respective slots having slot radiator elements is formed.
- the slot antenna can advantageously be made from metallized plastic.
- the reference sign means 1 a feed waveguide extending in a longitudinal direction, in which an electromagnetic wave is guided.
- the feed waveguide 1 is in Formed a rectangular waveguide and has a broad side 4, in the at least one slot 2 running in the longitudinal direction of the feed waveguide 1 Radiation of part of the electromagnetic guided in the feed waveguide 1 Shaft is formed.
- the back of the feed waveguide 1 is by another Broadside 9 formed.
- the narrow side 8 of the feed waveguide 1 is in the Top view.
- a polarizer waveguide 11 provided outside on the feed waveguide 1, i.e. in the direction of the radiation of the slot 2 downstream of the electromagnetic wave.
- This is designed, for example, in the form of a rectangular waveguide, which has a first transverse axis a and a second, perpendicular to this has second transverse axis b.
- the two transverse axes a and b lie transverse to the direction of radiation the electromagnetic radiation emerging from the slot 2.
- the polarizer waveguide 11 is at an angle ⁇ with the first transverse axis a twisted against the direction of the slot 2.
- the angle ⁇ corresponds to the desired one Rotation of the polarization direction against the polarization direction of the slot Second
- the first dimension L a of the polarizer waveguide in the direction of the first transverse axis a is greater than half the free space wavelength ⁇ / 2 of the electromagnetic radiation emitted by the slot 2.
- the second dimension L b in the direction of the second transverse axis b of the polarizer waveguide 11 is smaller than half the free space wavelength ⁇ / 2 of the emitted electromagnetic radiation.
- the polarizer waveguide 11 has a length H which is at least a quarter of the free space wavelength ⁇ / 4 of the emitted electromagnetic radiation. This results in a damping for the undesired cross-polarized wave component (H 01 wave) to a sufficiently small extent. If the length H of the polarizer waveguide 11 is increased substantially beyond the said quarter free space wavelength ⁇ / 4, there is a greater attenuation of the cross-polarized wave component H 01 and an influence on the bandwidth of the radiation coupling within wide limits.
- the slot antenna is particularly suitable as a group antenna with many similar ones Slot radiator elements, which have respective slots 2.
- the slot antenna is preferably made of metallized plastic.
- the polarizer waveguide 11 has a first dimension L a in the direction of the first transverse axis a, which is greater than half the free space wavelength ⁇ / 2 of the emitted electromagnetic radiation, and also the second dimension L b in the direction the orthogonal second transverse axis b is greater than half the free space wavelength ⁇ / 2.
- the slot antenna is therefore suitable for radiation with "elliptical" polarization.
- additional means for phase shifting can be provided in order to shift the orthogonally polarized vibration modes by 90 ° relative to one another.
- the one or more slots 2 formed in the broad side 4 of the feed waveguide 1 can as in the embodiment shown in Fig. 2a) and b) in the center line of the feed waveguide 1 may be designed to extend.
- the slots 2 can be against the center line of the feed waveguide 1 be staggered (offset slots).
- the feed waveguide 1 can also be designed as a web waveguide.
- the invention creates an antenna structure that is simple and inexpensive can be produced and for the emission of polarized electromagnetic Radiation is able to withstand additional loss of attenuation Need to become.
Landscapes
- Waveguide Aerials (AREA)
- Waveguide Switches, Polarizers, And Phase Shifters (AREA)
Abstract
Description
- Fig. 1
- eine vereinfachte perspektivische Darstellung einer Schlitzantenne zur Erläuterung der Polarisationsrichtung der abgestrahlten elektromagnetischen Wellen;
- Fig. 2a)
- eine Draufsicht auf einen Ausschnitt einer Schlitzantenne gemäß einem Ausführungsbeispiel der Erfindung; und
- Fig. 2b)
- eine seitliche Schnittansicht entlang der Linie A-A' durch den in Figur 2a) gezeigten Teil des Ausführungsbeispiels.
Claims (11)
- Schlitzantenne bestehend aus einem sich in Längsrichtung erstreckenden Speisehohlleiter (1) zur Führung elektromagnetischer Wellen mit mindestens einem in einer Breitseite (4) des Speisehohlleiters (1) ausgebildeten Schlitz (2) zum Abstrahlen einer elektromagnetischen Welle, wobei der Schlitz (2) auf der Außenseite des Speisehohlleiters (1) von einer Anordnung umgeben ist, mittels der die Polarisationsrichtung der vom Schlitz (2) abgestrahlten elektromagnetischen Welle gedreht wird, dadurch gekennzeichnet, dass der Schlitz (2) in Längsrichtung des Speisehohlleiters (1) ausgebildet ist und die den Schlitz (2) umgebende Anordnung ein rechtwinkliger Polarisatorhohlleiter (11) ist, der mit seiner einen Öffnung mit der Breitseite (4) des Speisehohlleiters (2) verbunden ist und an seiner anderen Öffnung eine Apertur aufweist, über die eine durch den Schlitz (2) in dem Polarisatorhohlleiter (11) angeregte Hohlleiterwelle abgestrahlt wird und der bezüglich des Schlitzes (2) derart ausgerichtet ist, dass eine Querachse (a) des Polarisatorhohlleiters (11) einen Winkel (α) mit der Längsachse des Schlitzes (2) bildet, wobei der Winkel (α) denjenigen Winkel darstellt, um den die Polarisation der aus dem Schlitz (2) in den Polarisatorhohlleiter (11) abgestrahlten elektromagnetischen Welle gedreht wird.
- Schlitzantenne nach Anspruch 1, dadurch gekennzeichnet, dass der Polarisatorhohlleiter (11) in Richtung der einen Querachse (a) eine erste Abmessung (La) und in Richtung der anderen Querachse (b) eine zweite Abmessung (Lb) aufweist, wobei die erste Abmessung (La) größer und die zweite Abmessung (Lb) kleiner als die halbe Freiraumwellenlänge λ/2 der von dem Schlitz (2) abgestrahlten elektromagnetischen Welle ist.
- Schlitzantenne nach Anspruch 1, dadurch gekennzeichnet, dass der Polarisatorhohlleiter (11) in Richtung der einen Querachse (a) eine erste Abmessung (La) und in Richtung der anderen Querachse (b) eine zweite Abmessung (Lb) aufweist, wobei die erste Abmessung (La) und die zweite Abmessung (Lb) größer als die halbe Freiraumwellenlänge λ/2 der von dem Schlitz (2) abgestrahlten elektromagnetischen Welle ist.
- Schlitzantenne nach Anspruch 3, dadurch gekennzeichnet, dass die erste Abmessung (La) und die zweite Abmessung (Lb) gleich sind und dass der Winkel (α) der Drehung der Polarisationsrichtung α=45° beträgt.
- Schlitzantenne nach einem der Ansprüche 3 oder 4, dadurch gekennzeichnet, dass die in dem Polarisatorhohlleiter (11) angeregten orthogonal polarisierten Schwingungsmoden hinsichtlich ihrer Phase gegeneinander verschoben werden, inbesondere derart, dass zur Erzeugung einer reinen Zirkularpolarisation ihre Phase 90° zueinander beträgt.
- Schlitzantenne nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, dass die Länge (H) des Polarisatorhohlleiters (11) größer als eine viertel Freiraumwellenlänge λ/4 der von dem Schlitz (2) abgestrahlten elektromagnetischen Welle ist.
- Schlitzantenne nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, dass der Schlitz (2) in der Mitte der Breitseite (4) des Speisehohlleiters (1) ausgebildet ist.
- Schlitzantenne nach einem der Ansprüche 1-6, dadurch gekennzeichnet, dass der Schlitz (2) aus der Mitte der Breitseite (4) des Speisehohlleiters (1) heraus versetzt ausgebildet ist.
- Schitzantenne nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, dass der Speisehohlleiter (11) als Steghohlleiter ausgebildet ist.
- Schlitzantenne nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, dass die Schlitzantenne als Gruppenelement mit mehreren gleichartigen jeweils Schlitze (2) aufweisenden Schlitzstrahlerelementen ausgebildet ist.
- Schlitzantenne nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, dass die Schlitzantenne aus metallisierten Kunststoff hergestellt ist.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10126468A DE10126468B4 (de) | 2001-05-31 | 2001-05-31 | Schlitzantenne |
DE10126468 | 2001-05-31 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1263084A2 true EP1263084A2 (de) | 2002-12-04 |
EP1263084A3 EP1263084A3 (de) | 2004-11-10 |
Family
ID=7686728
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP02007611A Withdrawn EP1263084A3 (de) | 2001-05-31 | 2002-04-04 | Schlitzantenne |
Country Status (4)
Country | Link |
---|---|
US (1) | US6657599B2 (de) |
EP (1) | EP1263084A3 (de) |
JP (1) | JP4065722B2 (de) |
DE (1) | DE10126468B4 (de) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US8866687B2 (en) | 2011-11-16 | 2014-10-21 | Andrew Llc | Modular feed network |
US9160049B2 (en) | 2011-11-16 | 2015-10-13 | Commscope Technologies Llc | Antenna adapter |
US8558746B2 (en) | 2011-11-16 | 2013-10-15 | Andrew Llc | Flat panel array antenna |
JP5490776B2 (ja) | 2011-12-28 | 2014-05-14 | 東光株式会社 | 導波管スロットアンテナ |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB507473A (en) * | 1936-09-15 | 1939-06-14 | Otto Bormann | Improvements in or relating to coupling devices for use in the production, amplification or reception of ultra-short waves |
GB582856A (en) * | 1944-07-05 | 1946-11-29 | John Betteley Birks | Improvements in or relating to electromagnetic radiators or receivers |
GB669463A (en) * | 1945-09-19 | 1952-04-02 | Honorary Advisory Council Sci | Directive antennas for microwaves |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE731417C (de) * | 1939-08-22 | 1943-02-09 | Julius Pintsch Kom Ges | Gruppenstrahleranordnung fuer ultrakurze Wellen |
GB604612A (en) * | 1945-11-28 | 1948-07-07 | Leonard Lewin | Apparatus for the radiation or reception of electromagnetic waves |
US3778838A (en) * | 1972-12-01 | 1973-12-11 | Hughes Aircraft Co | Circular symmetric beam forming apparatus |
US4429313A (en) * | 1981-11-24 | 1984-01-31 | Muhs Jr Harvey P | Waveguide slot antenna |
US5619216A (en) * | 1995-06-06 | 1997-04-08 | Hughes Missile Systems Company | Dual polarization common aperture array formed by waveguide-fed, planar slot array and linear short backfire array |
FR2763749B1 (fr) * | 1997-05-21 | 1999-07-23 | Alsthom Cge Alcatel | Source d'antenne pour l'emission et la reception d'ondes hyperfrequences polarisees |
US6028562A (en) * | 1997-07-31 | 2000-02-22 | Ems Technologies, Inc. | Dual polarized slotted array antenna |
DE19734854A1 (de) * | 1997-08-12 | 1999-02-18 | Alsthom Cge Alcatel | Polarisationsweiche für zwei unterschiedliche Frequenzbänder |
US6166610A (en) * | 1999-02-22 | 2000-12-26 | Hughes Electronics Corporation | Integrated reconfigurable polarizer |
US6476772B1 (en) * | 2001-04-16 | 2002-11-05 | Space Systems/Loral, Inc. | Waveguide slot array capable of radiating shaped beams |
-
2001
- 2001-05-31 DE DE10126468A patent/DE10126468B4/de not_active Expired - Fee Related
-
2002
- 2002-04-04 EP EP02007611A patent/EP1263084A3/de not_active Withdrawn
- 2002-05-22 JP JP2002147445A patent/JP4065722B2/ja not_active Expired - Fee Related
- 2002-05-29 US US10/156,661 patent/US6657599B2/en not_active Expired - Fee Related
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB507473A (en) * | 1936-09-15 | 1939-06-14 | Otto Bormann | Improvements in or relating to coupling devices for use in the production, amplification or reception of ultra-short waves |
GB582856A (en) * | 1944-07-05 | 1946-11-29 | John Betteley Birks | Improvements in or relating to electromagnetic radiators or receivers |
GB669463A (en) * | 1945-09-19 | 1952-04-02 | Honorary Advisory Council Sci | Directive antennas for microwaves |
Also Published As
Publication number | Publication date |
---|---|
JP4065722B2 (ja) | 2008-03-26 |
EP1263084A3 (de) | 2004-11-10 |
US20020190910A1 (en) | 2002-12-19 |
US6657599B2 (en) | 2003-12-02 |
DE10126468A1 (de) | 2003-01-02 |
JP2003037432A (ja) | 2003-02-07 |
DE10126468B4 (de) | 2007-07-05 |
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