CN101697381B - Antenna of ridge waveguide inclined slot pairs - Google Patents
Antenna of ridge waveguide inclined slot pairs Download PDFInfo
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- CN101697381B CN101697381B CN 200910184962 CN200910184962A CN101697381B CN 101697381 B CN101697381 B CN 101697381B CN 200910184962 CN200910184962 CN 200910184962 CN 200910184962 A CN200910184962 A CN 200910184962A CN 101697381 B CN101697381 B CN 101697381B
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Abstract
The invention relates to an antenna of ridge waveguide inclined slot pairs. More than two pairs of equidistant radiation slots are arranged on a radiation waveguide tube 1 of the antenna; the cross sections of the radiation slots are a concave-shaped metal ridge waveguide tube, more than two pairs of inclined radiation slots are symmetrically arranged on upwards projecting metal walls at both sides, and the radiation slots are symmetrically arranged in a reversed V shape; the adjacent inclined radiation slot pairs are arranged according to a symmetrical mode; and one end of the radiation waveguide tube is provided with an antenna input opening, and the other end of the radiation waveguide tube is sealed and short-circuited to form a waveguide gap pair standing wave array. The antenna structure has small size, and the cross-section area of the waveguide tube is compressed by more than one half; full-space cross polarization suppression can be realized; and the antenna waveguide structure is easy to adopt simple up-and-down superposition with a waveguide power divider with the same section, a broadband waveguide slot antenna array is realized, and the processing process is good.
Description
Technical field
The present invention relates to a kind of Waveguide slot antenna, specifically a kind of ridge waveguide slit is to antenna.
The present invention both can be used for receiving, also can be used for launching radio wave.At military aspect, can be used as the terminal antenna of radar system.Aspect civilian, can be used as antenna for base station, satellite ground mobile terminal antenna of communication etc.
Background technology
Along with the fast development of application with demand, in order to take full advantage of valuable frequency spectrum, dual polarized antenna is also more and more extensive in the application in dual-use field, therefore the polarization purity of every kind of poliarizing antenna is required the raising.In addition, electronic equipment also has the specific (special) requirements such as aspects such as volume and weights in some concrete application.
Wave guide slot array antenna is as transmitting and receiving the antenna of electromagnetic signal since its efficient high, be easy to processing and self structure intensity advantages of higher, be widely used in thunderous and communication field.
Waveguide slot antenna mainly comprises: rectangular waveguide broadside longitudinal biasing slit, rake joist antenna, the narrow limit of rectangular waveguide rake joist antenna (Ba Lanizi, modern antennas handbook, A John Wiley; Sons, Inc. publishes 2008).In actual applications, slot antenna is usually as the perpendicular polarization battle array, and the inclined slot on the narrow wall antenna uses as the horizontal polarization battle array.For waveguide broadside longitudinal biasing slit antenna, because the slit is parallel consistent, can obtain extraordinary cross polarization rejection; And Narrow Wall of Waveguide limit rake joist antenna, single linear array is difficult to realize low-cross polarization, therefore, usually need in actual applications to adopt the mode of anti-phase feed excitation between linear array that the antenna cross-polarization component is suppressed, this method, need on the one hand to increase phase shifter apparatus, on the other hand because different direction of arrival Existential Space phase differences, especially (λ/2d) (λ is operating frequency free space wavelength departing from side firing angle θ=arcsin, d is the centre distance of adjacent two linear arrays) near the method complete failure, therefore, be difficult to realize that the cross polarization of the total space suppresses.Although adopt metallic membrane to encourage non-rake joist can realize extraordinary cross-polarization performance (Wang Wei on the Narrow Wall of Waveguide limit, the clock up time, Deng, the non-inclined slot antenna in utmost point low-cross polarization Narrow Wall of Waveguide limit, microwave and light wall bulletin, 2005,44 (1): 91-93), but owing in each radiating slot both sides, need paired metallic membrane in the metal waveguide cavity, the increase that therefore brings difficulty of processing and cost.
In addition, in the design of Waveguide slot standing-wave array is used, often need to adopt waveguide power divider and radiating guide integrated design to realize broadband performance (Wang Wei, wide-band printing antenna and dual-polarized, microstrip and wave guide slot array antenna, doctor's thesis, 2005.2), because the antenna structure characteristics, radiating guide and feed waveguide are arranged in parallel up and down in the perpendicular polarization broadband waveguide slot antenna array, handling ease.But for the horizontal polarization broadband waveguide slot antenna array, radiating guide and feed waveguide all adopt the Asymmetric Ridged Waveguide complementary structure to realize compact compression cross section purpose, but also will pay the large cost of difficulty of processing, then antenna thickness is very large to adopt conventional rectangular waveguide stacked system.
In a word, the horizontal polarization Waveguide slot antenna of above introduction or volume are large, cross polarization is higher; Increase the phase shifter extras and suppress cross polarization, and can't realize that still the total space suppresses ability; Complex structure, processing cost are high.
Summary of the invention
In order to realize single horizontal polarization Waveguide slot antenna low-cross polarization performance, the invention provides a kind of antenna of ridge waveguide inclined slot pairs.
The present invention realizes that by architecture advances antenna suppresses in radiating element level (radiating slot) cross polarization on the basis of existing Waveguide slot antenna, concrete architecture advances technical scheme is as follows:
Antenna of ridge waveguide inclined slot pairs comprises radiated wave conduit 1, radiated wave conduit 1 is provided with equidistant radiating slot more than two pairs, the cross section of described radiated wave conduit 1 is " recessed " shape metal ridge waveguide, prominent metallic walls 4 is arranged with the inclined radiation slot 2 more than two pairs in both sides, described radiating slot is to being " eight " font symmetric arrays, 0 °＜θ of angle between single-side radiating slit and radiated wave conduit 1 longitudinal centre line＜90 °, adjacent inclined radiation slot is arranged pressing symmetric mode;
Radiated wave conduit 1 one ends are antenna input port, other end sealing short circuit, consist of Waveguide slot to standing-wave array.
Described radiated wave conduit is symmetrical single ridged waveguides.
Described radiating slot 2 width are the 1-3 millimeter, and the radiating slot 2 inner degree of depth are less than or equal to the metal ridge degree of depth, and the outer end degree of depth is less than the metallic waveguide height.
Described adjacent inclined radiation slot between spacing equate.
Useful technique effect of the present invention is embodied in down with the aspect:
1, adopt the metal ridge waveguide as the radiated wave conduit, effectively reduced the size of antenna, the cross-sectional area of waveguide has compressed over half;
2, on the single ridge metallic waveguide of " recessed " shape, open symmetrical inclined slot as the radiating slot unit on the metallic walls of dashing forward on the both sides, the non-inclined slot antenna that belongs to the diaphragm excitation with Narrow Wall of Waveguide limit karat gold is compared, because metallic waveguide is interior without supernumerary structure, so difficulty of processing reduces greatly;
3, compare with the narrow limit of conventional waveguide inclined slot antenna array, two of slot pairs are the inclined slot symmetric arrays independently, be characterized by from anti-phase feed, realized that the cross polarization of radiating element H face suppresses on the single antenna, for inhibition method between many traditional antennas, reduced phase shifter apparatus, and since two independent inclination slits of slot pairs between spacing less than half wavelength, got rid of radiation space 180 degree phase differences and occurred, can realize that therefore total space cross polarization suppresses;
4, this antenna wave guide structure is easy to adopt the waveguide power divider with same cross section to superpose simply up and down, realizes broadband waveguide slot antenna array, and difficulty of processing is low.
Description of drawings
Fig. 1 is antenna stereoscopic design sketch of the present invention;
Fig. 2 is antenna wave guide pipe cross-sectional view of the present invention;
Fig. 3 is that two slits of the present invention are to the element antenna vertical view;
Fig. 4 is that two slits of the present invention are to the schematic diagram of element antenna A-A direction;
Fig. 5 is that two slits of the present invention are to the element antenna upward view;
Fig. 6 is that five slits of the present invention are to the element antenna vertical view;
Fig. 7 is that five slits of the present invention are to the schematic diagram of element antenna A-A direction;
Fig. 8 is that five slits of the present invention are to the element antenna upward view;
Fig. 9 is that two slits of the present invention are to element antenna directional diagram and cross-polarization performance;
Figure 10 is that five slits of the present invention are to element antenna directional diagram and cross-polarization performance.
Embodiment
Below in conjunction with accompanying drawing, by embodiment the present invention is further described.
Embodiment 1:
Work in two unit Waveguide slots of even distribution of X-band to standing-wave array, the termination 5 of radiated wave conduit 1 is the antenna input port, its another termination 6 short circuits.Referring to Fig. 1, the slit is to getting wherein two, and other each detail section structure is referring to Fig. 2 to Fig. 5.The work centre frequency is f
0, lower side frequency is f
L, upper side frequency is f
H, the present embodiment selects respectively 9.6,9.0,10.2GHz.
Waveguide is that the cross section is symmetrical single ridge radiated wave conduit 1 of " recessed " shape, and its width is a, highly is b, and metal ridge 3 width are Rw, highly are Rh, as shown in Figure 2.
Radiated wave conduit one termination 5 is signal input, and another termination 6 is the sealing of metal waveguide wall, i.e. short circuit is Lsh apart from last slit to spacing.
On the metallic walls 4 that the slit is out to give prominence on both sides, single ridge radiated wave conduit 1 top of symmetry to the radiating antenna unit, the inclination angle, slit is θ, and two monolateral inclined slots are identical, and are symmetrical by waveguide longitudinal center cross section mirror image.
The present embodiment antenna is along vertically distribute 2 slits pair of waveguide, and both are by its center plane of symmetry mirror image symmetric arrays, as shown in Figure 3.
The slit is L to the degree of depth in the one-sided slit incision metal ridge
2, the degree of depth of incision outside wave guide wall is L
3, length is L on the outstanding wall in top
1, stitching wide is Ws, shown in Fig. 1-5, adjacent slits between centre distance be Ls.
Design parameter is determined as follows:
According to the antenna array actual needs, determine ridge waveguide width a, its range of choice is: 0＜a≤0.9 λ
H(λ
HUpper side frequency free space wavelength), the present embodiment is 0.442 λ
HAntenna height b range of choice is: 0＜b＜0.5 λ
H, metal ridge width R
WRange of choice is: 0＜R
W＜a, metal ridge height R
hRange of choice is: 0＜R
h＜b, antenna height b, metal ridge width R
WWith metal ridge height R
hThe three is associated, selection is transmitted in waveguide and not by by as criterion take working band, consider simultaneously the factors such as mechanical process capacity and machining accuracy condition restriction, the computational methods of this parameter are known by this professional designer, repeat no more, the present embodiment is preferably herein: b=0.2176 λ
0, R
w=0.1376 λ
0, R
h=0.1152 λ
0
The slit inclination angle theta take two slits to the admittance value sum as 1 as design criterion, the computational methods of this parameter are known by this professional designer, the present embodiment is 63.6 °, R-joining gap size: L
1=0.5 (a-R
W)/sin θ, 0＜L
2≤ R
h, be preferably 0.1024 λ
00＜L
3≤ b is preferably 0.2064 λ
0, monolateral inclined slot size total length L
1+ L
2+ L
3Be 0.46 λ
0
Stitch the wide 0.1 * (L that is about
1+ L
2+ L
3), the present embodiment is preferably 2mm.
Adjacent slits is to the centre distance 0＜L of radiating element
s≤ 0.9 λ
H, take antenna graing lobe does not appear as selection criterion, equal 0.5 λ
G0(λ
G0The centre frequency guide wavelength), the present embodiment is preferably 0.81 λ
0, the waveguide closed terminal is adjacent the slit to radiating element center distance Lsh=0.25 λ
G0
Metal waveguide wall thickness t determines with working ability, is preferably 0.8mm.
These inventive embodiments two element antenna E faces and H face typical case's antenna pattern and cross-polarization performance can be found out at two tangent plane cross polarization levels to be lower than more than the main pole level 34dB referring to Fig. 9, have realized that good cross polarization suppresses.
Embodiment 2:
Referring to Fig. 1, Fig. 2, Fig. 6, Fig. 7 and Fig. 8, work in five unit Waveguide slots of X-band to standing-wave array, five radiating element physical dimensions are identical, and radiating guide pipe end 5 is signal input, its another termination 6 short circuits, frequency is selected with embodiment 1.The system of selection of the present embodiment antenna size, scope, principle are identical with embodiment 1.Wherein, the inclined slot physical dimension is preferably: θ=26.4 °, L2=0.1024 λ
0, L3=0.1634 λ
0, other size is with embodiment 1.
These embodiment five element antenna E faces and H face typical case's antenna pattern and cross-polarization performance can be found out at two tangent plane cross polarization levels to be lower than more than the main pole level 47dB referring to Figure 10, have realized that good cross polarization suppresses.
Above content is in conjunction with the detailed description made for the present invention of concrete preferred implementation, can not assert that implementation of the present invention only limits to these explanations.For those skilled in the art; without departing from the inventive concept of the premise; can also make some simple deduction or replace; such as symmetric double ridge waveguide slit to antenna, asymmetric list/double ridged waveguide slit to antenna; and such slit all should be considered as belonging to the invention protection range that the present invention is determined by claims of submitting to the capable ripple array antenna that is applied to terminal termination matched load etc.
Claims (1)
1. antenna of ridge waveguide inclined slot pairs, comprise radiated wave conduit (1), radiated wave conduit (1) is provided with equidistant radiating slot more than two pairs, it is characterized in that: the cross section of described radiated wave conduit (1) is " recessed " shape metal ridge waveguide, prominent metallic walls (4) is arranged with the inclined radiation slot (2) more than two pairs in both sides, described radiating slot is to being " eight " font symmetric arrays, the 0 °＜θ of angle between single-side radiating slit (2) and radiated wave conduit (1) longitudinal centre line＜90 °; Adjacent inclined radiation slot is arranged pressing symmetric mode;
Radiated wave conduit (1) one end is antenna input port, other end sealing short circuit, consists of Waveguide slot to standing-wave array; Described radiated wave conduit is symmetrical single ridged waveguides;
Described radiating slot (2) width is the 1-3 millimeter, and the inner degree of depth of radiating slot (2) is less than or equal to the metal ridge degree of depth, and the outer end degree of depth is less than the metallic waveguide height;
Described adjacent inclined radiation slot between spacing equate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200910184962 CN101697381B (en) | 2009-10-23 | 2009-10-23 | Antenna of ridge waveguide inclined slot pairs |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200910184962 CN101697381B (en) | 2009-10-23 | 2009-10-23 | Antenna of ridge waveguide inclined slot pairs |
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| Publication Number | Publication Date |
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| CN101697381A CN101697381A (en) | 2010-04-21 |
| CN101697381B true CN101697381B (en) | 2013-01-30 |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102496784B (en) * | 2011-11-11 | 2014-05-28 | 中国电子科技集团公司第三十八研究所 | Ridge waveguide broad-side horizontal straight slot antenna |
| CN103490168B (en) * | 2013-09-29 | 2015-06-24 | 中国电子科技集团公司第三十八研究所 | Circular polarized antenna |
| CN104577347B (en) * | 2014-12-03 | 2017-06-30 | 中国电子科技集团公司第三十八研究所 | A kind of two-band multipolarization Shared aperture Waveguide slot antenna |
| CN107634342B (en) * | 2017-08-29 | 2020-06-05 | 大连港森立达木材交易中心有限公司 | Bidirectional uniform irradiation antenna feeder system |
| CN109378595B (en) * | 2018-11-27 | 2021-06-29 | 上海航天电子通讯设备研究所 | Novel broadband low-profile array antenna |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101000979A (en) * | 2006-12-30 | 2007-07-18 | 中国电子科技集团公司第三十八研究所 | Broadband single ridge waveguide broadside longitudinal seam standing-wave antenna |
| CN101150224A (en) * | 2007-10-31 | 2008-03-26 | 中国电子科技集团公司第三十八研究所 | Broadband dual L wave guide narrow edge gap antenna array |
-
2009
- 2009-10-23 CN CN 200910184962 patent/CN101697381B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101000979A (en) * | 2006-12-30 | 2007-07-18 | 中国电子科技集团公司第三十八研究所 | Broadband single ridge waveguide broadside longitudinal seam standing-wave antenna |
| CN101150224A (en) * | 2007-10-31 | 2008-03-26 | 中国电子科技集团公司第三十八研究所 | Broadband dual L wave guide narrow edge gap antenna array |
Non-Patent Citations (2)
| Title |
|---|
| 金剑等.宽带单脊波导缝隙天线阵设计.《中国电子科学研究院学报》.2007,第2卷(第2期),第152页标题1，图1. * |
| 隋立山等.矩形波导窄边倾斜缝隙天线阵的设计.《现代电子技术》.2008,第16页标题3,图1-2. * |
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