CN104505595A - Wideband single-cavity waveguide slot resonant antenna - Google Patents
Wideband single-cavity waveguide slot resonant antenna Download PDFInfo
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- CN104505595A CN104505595A CN201410744296.8A CN201410744296A CN104505595A CN 104505595 A CN104505595 A CN 104505595A CN 201410744296 A CN201410744296 A CN 201410744296A CN 104505595 A CN104505595 A CN 104505595A
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Abstract
The invention relates to a wideband single-cavity waveguide slot resonant antenna. The antenna comprises a metallic waveguide tube with a rectangular cross section, wherein radiating slots are uniformly arranged on the two sides of a central line along the length direction on a wide side of the metallic waveguide tube in a staggering manner; more than two pairs of loading slots are also uniformly distributed on the wide side; each pair of loading slots are symmetrical about the central line of the length direction of the metallic waveguide tube and are positioned at the edges on the two sides of the wide side of the metallic waveguide tube respectively; the middle part in the metal waveguide tube is provided with a feed matching block; the feed matching block is connected with a coaxial connector; the coaxial connector is used for feeding the metallic waveguide tube through the feeding matching block. By additionally arranging the loading slots, the working bandwidth of the waveguide slot resonant antenna is enhanced, the weight of the antenna is reduced, and the height of the section of the antenna is reduced; by additionally arranging feed matching block, the impedance bandwidth for work of the antenna is increased; the antenna can easily translate along the same direction to form a planar array antenna; the antenna is connected with a T/R component, supplemented by a power supply, a wave control, a mounting structural member and the like, so a broadband active phased array antenna can be formed.
Description
Technical field
The invention belongs to Waveguide slot antenna technical field, specifically single cavity waveguide gap, a kind of broadband resonant 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.In civilian, can be used as the antenna for base station of communication, satellite ground mobile terminal antenna etc.
Background technology
Broad-band antenna is more and more extensive in the application in dual-use field.Meanwhile, in some embody rule of electronic equipment, also have such as: the particular/special requirement of volume, weight, loss and scan angle.
Wave guide slot array antenna, as the antenna of transmitting and receiving electromagnetic signal, because its efficiency is high, structural strength advantages of higher, is widely used in thunderous and communication field.
For Waveguide slot resonant antenna, bandwidth is subject to the impact of unit number, cut-off wavelength and submatrix number, and usually, resonant element number more at most bandwidth is narrower.(horse increases. Ha Madala; waveguide slot array wideband frequency restriction in parallel; International Electrical and Electronic Engineering Association-Antennas And Propagation journal; Vol. 37,1989, pp:817-823./M. Hamadallah; Frequency limitations on broad-band performance of shunt slot arrays; IEEE Trans Antenna Propagation Vol. 37,1989, pp:817-823.; Wang Wei, Qi Meiqing, Jin Mouping, " waveguide gap resonance battle array bandwidth research in parallel ", modern electronic technology/supplementary issue, 2006.9, pp:178-180.; Wang Wei, clock up time, Qi Meiqing, Liang Xianling, ridge waveguide feed wideband ridge waveguide slot array back-to-back, microwave and light technology bulletin, 2005,45 (2): 102-104/Wang Wei, Zhong Shun-Shi, Qi Mei-Qing and Liang Xian-Ling, Broadband ridged waveguide slot antenna array fed by back-to-back ridged waveguide, Mirowave and Optical Tech. Lett., 2005,45 (2): 102-104).In these researchs, Waveguide slot resonance battle array bandwidth broadning depends on and adopts submatrix method for designing, is encouraged each submatrix feed by power splitter, thus reaches the object reducing number of unit.This employing submatrix designing technique, adopts waveguide power divider to realize the method in broadband, adds the height of antenna section, and add the weight of antenna.
In a word, with regard to current Waveguide slot resonant antenna, its bandwidth of operation be expanded, depend on the method adopting submatrix design, adopt the waveguide power divider of stacked on top of one another to each submatrix feed.In volume, weight, processing, cost etc., have larger inferior position, this is particularly outstanding in applying at such as airborne and electronic equipment on satellite.
Summary of the invention
The present invention aims to provide a kind ofly has good broadband, the compression of low-cross polarization characteristic, particularly antenna height, the simple rectangular waveguide broadside of structure longitudinally straight radiating slot antenna.
Concrete technical solution is as follows:
Single cavity waveguide gap, broadband resonant antenna comprises the metallic waveguide that cross section is rectangle, the two ends of described metallic waveguide are respectively the first short-circuit end and the second short-circuit end, and broadside uniform being staggered in center line both sides along its length of metallic waveguide is provided with radiating slot;
The broadside of described metallic waveguide is also laid with two and stitches above loading; Often pair loads seam with the center line of metallic waveguide length direction symmetry, and lays respectively at the edge of the broadside both sides of metallic waveguide; Effect is the bandwidth of operation strengthening ripple list chamber seam guide gap resonant antenna;
In described metallic waveguide, middle part is provided with feed match block; Described feed match block is lath-shaped, and the top at feed match block two ends is respectively equipped with the contiguous block raised up, and is connected to the inner chamber end face of metallic waveguide by the contiguous block feed match block at two ends; The central bottom of feed match block is provided with the feed block to lower convexity, and feed block is connected to coaxial connector, and the terminals of coaxial connector extend outside the bottom of metallic waveguide; Coaxial connector carries out feed by feed match block to metallic waveguide; What effect was to increase the resonant antenna work of single cavity waveguide gap stays anti-bandwidth.
The long SL of seam of described radiating slot is 0.5
, the spacing Ls between adjacent radiation seam is 0.5
, the distance Lsh of terminal radiation seam distance waveguide terminal end face is 0.25
, the seam of radiating slot is wide is 2mm, wherein
centered by frequency wave guide wavelength; The described long CSL of seam loading seam is 0.25
, loading the seam stitched wide is 2mm, wherein
centered by frequency free space wavelength; Spacing between adjacent load seam is the integral multiple of the spacing Ls between adjacent radiation seam.
Single cavity waveguide gap, broadband resonant antenna of more than two is connected in parallel single cavity waveguide gap, composition broadband resonant antenna battle array.
Advantageous Effects of the present invention embodies in the following areas:
1, on the resonant antenna of conventional waveguide gap, set up loading gap, enhance the directional diagram bandwidth of operation of Waveguide slot resonant antenna, directional diagram bandwidth of operation is increased to 8.9% by original 2.6%, decrease the weight of antenna, antenna weights reduces to original 2/3, reduce the section height of antenna, the section height of antenna is reduced to original 1/2;
2, the Waveguide slot antenna of central coaxial connector feed adopts the feed match block coupling of lath-shaped, and what add Antenna Operation stays anti-bandwidth, and impedance bandwidth is increased to 9.5% by original 5.3%;
3, the present invention is easy to translation in the same direction and forms planar array antenna, by being connected with T/R assembly, being aided with power supply, ripple control and mounting structure etc. and can forming broadband active phased array antenna;
4, structure of the present invention is simple, difficulty of processing is low, and cost is few.
Accompanying drawing explanation
Fig. 1 is inventive antenna stereogram.
Fig. 2 is the cross-sectional view of metallic waveguide of the present invention.
Fig. 3 is the partial sectional view of Fig. 1.
Fig. 4 is the partial enlarged drawing of Fig. 3.
Fig. 5 is the vertical view of Fig. 1.
Fig. 6 is Fig. 1 cutaway view along its length.
Fig. 7 is the present invention 8 × 16 element antenna battle array schematic diagram.
Fig. 8 is the present invention 16 element antenna and traditional 16 unit Waveguide slot resonant antenna standing-wave ratio correlation curves.
Fig. 9 is the present invention 16 element antenna and traditional 16 unit Waveguide slot resonant antenna 9.05GHz directional diagram and correlation curves.
Figure 10 is the present invention 16 element antenna and traditional 16 unit Waveguide slot resonant antenna 9.55GHz directional diagram and correlation curves.
Figure 11 is the present invention 16 element antenna and traditional 16 unit Waveguide slot resonant antenna 9.9GHz directional diagram and correlation curves.
Figure 12 is the present invention 8 × 16 element antenna intermediate frequency directional diagram curve.
In Fig. 1-6, sequence number illustrates: metallic waveguide 1, radiating slot 2, loading seam 3, first short-circuit end 4, second short-circuit end 5, coaxial connector 6, feed match block 7, contiguous block 71, feed block 72.
Embodiment
Below in conjunction with accompanying drawing, by embodiment, the present invention is further described.
Embodiment 1
Single cavity waveguide gap, broadband resonant antenna of the present embodiment works in X-band, and operating center frequency is f
0be 9.55 GHz, lower side frequency f
lbe 9.05 GHz, upper side frequency f
hfor 9.9GHz.Centre frequency guide wavelength
for 48.6mm, centre frequency free space wavelength
for 31.4mm.
See Fig. 1, single cavity waveguide gap, broadband resonant antenna comprises the metallic waveguide 1 that cross section is rectangle, see Fig. 2, the range of choice of the lumen width a of metallic waveguide 1 is: 0≤a≤0.9 λ H (λ H is up-conversion free space wavelength), and the present embodiment a is 20.4mm; The range of choice of cavity heights b is: 0 < b≤a, and the present embodiment is preferably: b=8mm; The wall thickness t of metallic waveguide 1 is 1mm.The two ends of metallic waveguide 1 are respectively the first short-circuit end 4 and the second short-circuit end 5, and uniform being staggered in broadside (end face) center line both sides along its length of metallic waveguide 1 offers 16 radiating slots 2; In the present embodiment, the length SL of radiating slot 2 is 0.5
, i.e. SL=15.2mm, stitching wide is 2mm; The distance Sp of radiating slot 2 distance center line is less than 0.5a, and the present embodiment Sp is 2mm.Centre distance Ls between adjacent radiation seam 2 is 0.5 guide wavelength, i.e. 24.3mm.Spacing Lsh between the center of the radiating slot 2 adjacent with short-circuit end and the first short-circuit end 4 or the second short-circuit end 5 is 0.25 guide wavelength, and namely Lsh is 12.15mm.
See Fig. 5, the broadside of metallic waveguide 1 is also laid with three to loading seam 3, and often pair loads seam 3 with the center line of metallic waveguide length direction symmetry, and lays respectively at the end face both sides of the edge of metallic waveguide 1; The distance CSp that loading seam 3 departs from the longitudinal centre line of metallic waveguide 1 is less than 0.5a, and the present embodiment is preferably 9mm, and the long CSL of seam loading seam 3 is 0.25
, the present embodiment is preferably 8mm, and stitching wide is 2mm; Spacing between adjacent load seam is the integral multiple of the spacing Ls between adjacent radiation seam, and the present embodiment is preferably 97.2mm.The effect loading seam 3 is the bandwidth of operation strengthening ripple list chamber seam guide gap resonant antenna.
See Fig. 3, Fig. 4 and Fig. 6, in metallic waveguide 1, middle part is provided with feed match block 7.Feed match block 7 is lath-shaped, the integral multiple of the length of feed match block 7 to be TL be Ls, and the present embodiment is preferably 194.4mm; The top at feed match block 7 two ends is respectively equipped with the contiguous block 71 raised up, the inner chamber end face of metallic waveguide 1 is connected to by the contiguous block 71 feed match block 7 at two ends, height Th≤the 0.5b of the feed match block 7 at contiguous block 71 place, the present embodiment is preferably 4.2mm; The length Tw of contiguous block 71 is that between 1mm ~ 0.25Ls, the present embodiment is preferably 9.5mm, the width Te≤0.5a of contiguous block 71, and the present embodiment is preferably 7mm; Thickness Twh in the middle part of feed match block 7 is that between 1mm ~ 0.8Th, the present embodiment is preferably 1.8mm; The central bottom of feed match block 7 is provided with the feed block 72 to lower convexity, and the length Mw of feed block 72 is that between 2mm ~ 0.5TL, the present embodiment is preferably 5mm, the thickness Mh≤0.5b of feed block 72, and the present embodiment is preferably 1.2mm; Feed block 72 is connected to coaxial connector 6, and the terminals of coaxial connector 6 extend outside the bottom of metallic waveguide 1; Coaxial connector 6 carries out feed to metallic waveguide 1 by feed match block 7; What effect was to increase the resonant antenna work of single cavity waveguide gap stays anti-bandwidth.
The present embodiment 16 element antenna and traditional 16 unit Waveguide slot resonant antenna standing wave correlation curves and low frequency, intermediate frequency, high frequency typical case antenna pattern correlation curve are see shown in Fig. 8 to Figure 11, can find out when same unit number, cut-off wavelength and submatrix number, the present invention is to stay anti-bandwidth sum directional diagram bandwidth all a lot of than traditional Waveguide slot resonant antenna broadening.
Embodiment 2
See Fig. 7, this Unit 8 × 16 Waveguide slot antenna submatrix 16 yuan of linear arrays as shown in Figure 1 in the same direction translation form, and are namely connected in parallel by single cavity waveguide gap, eight broadbands resonant antenna and form single cavity waveguide gap, broadband resonant antenna battle array.The intermediate frequency typical directions figure of this inventive embodiments as shown in figure 12.This submatrix is connected with T/R assembly, is aided with power supply, ripple control and peace building element etc. and can be extended to large-scale Subarray active phase array antenna.
Above content is in conjunction with the detailed description made for the present invention of concrete preferred implementation, can not assert that the present invention specifically implements to be only limitted to these explanations.For those skilled in the art; without departing from the inventive concept of the premise; some simple deduction or replace can also be made, as to ridge waveguide gap resonant antenna, all should be considered as belonging to the invention protection range that the present invention is determined by submitted to claims.
Claims (5)
1. single cavity waveguide gap, broadband resonant antenna, comprise the metallic waveguide that cross section is rectangle, the two ends of described metallic waveguide are respectively the first short-circuit end and the second short-circuit end, broadside uniform being staggered in center line both sides along its length of metallic waveguide is provided with radiating slot, it is characterized in that: the broadside of described metallic waveguide is also laid with two and stitches above loading; Often pair loads seam with the center line of metallic waveguide length direction symmetry, and lays respectively at the edge of the broadside both sides of metallic waveguide; Effect is the bandwidth of operation strengthening ripple list chamber seam guide gap resonant antenna;
In described metallic waveguide, middle part is provided with feed match block; Described feed match block is lath-shaped, and the top at feed match block two ends is respectively equipped with the contiguous block raised up, and is connected to the inner chamber end face of metallic waveguide by the contiguous block feed match block at two ends; The central bottom of feed match block is provided with the feed block to lower convexity, and feed block is connected to coaxial connector, and the terminals of coaxial connector extend outside the bottom of metallic waveguide; Coaxial connector carries out feed by feed match block to metallic waveguide; What effect was to increase the resonant antenna work of single cavity waveguide gap stays anti-bandwidth.
2. single cavity waveguide gap, broadband according to claim 1 resonant antenna, is characterized in that: the end face of described metallic waveguide is laid with three to loading seam.
3. single cavity waveguide gap, broadband according to claim 1 and 2 resonant antenna, is characterized in that: the long SL of seam of described radiating slot is 0.5
, the spacing Ls between adjacent radiation seam is 0.5
, the distance Lsh of terminal radiation seam distance waveguide terminal end face is 0.25
, the seam of radiating slot is wide is 2mm, wherein
centered by frequency wave guide wavelength; The described long CSL of seam loading seam is 0.25
, loading the seam stitched wide is 2mm, wherein
centered by frequency free space wavelength; Spacing between adjacent load seam is the integral multiple of the spacing Ls between adjacent radiation seam.
4. single cavity waveguide gap, broadband according to claim 1 resonant antenna, is characterized in that: single cavity waveguide gap, broadband resonant antenna of more than two is connected in parallel single cavity waveguide gap, composition broadband resonant antenna battle array.
5. single cavity waveguide gap, broadband according to claim 4 resonant antenna, is characterized in that: single cavity waveguide gap, eight broadbands resonant antenna is connected in parallel single cavity waveguide gap, composition 8 × 16 unit broadband resonant antenna battle array.
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| CN201410744296.8A CN104505595B (en) | 2014-12-09 | 2014-12-09 | Wideband single-cavity waveguide slot resonant antenna |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107302404A (en) * | 2017-07-05 | 2017-10-27 | 西安交通大学 | Near-field coupling passive cross modulation test device based on square coaxial configuration |
| CN108539414A (en) * | 2018-03-29 | 2018-09-14 | 中国电子科技集团公司第三十八研究所 | A kind of compact-sized efficient and light weight slot antenna and antenna array |
| CN109659684A (en) * | 2018-12-20 | 2019-04-19 | 中国科学院上海微***与信息技术研究所 | One kind leans forward double aperture slit antenna and preparation method thereof |
| CN109802240A (en) * | 2018-12-29 | 2019-05-24 | 南京信息职业技术学院 | A kind of circular polarisation slot antenna based on rectangular waveguide |
| CN111864377A (en) * | 2020-07-29 | 2020-10-30 | 中国电子科技集团公司第十四研究所 | Broadband collinear seam waveguide slot antenna |
| CN113782985A (en) * | 2021-08-19 | 2021-12-10 | 中国工程物理研究院应用电子学研究所 | High-power broadside longitudinal-slit waveguide slot array |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5210543A (en) * | 1988-12-20 | 1993-05-11 | Hughes Aircraft Company | Feed waveguide for an array antenna |
| US20030001789A1 (en) * | 2001-05-31 | 2003-01-02 | Klaus Solbach | Slot antenna element |
| CN201397880Y (en) * | 2009-05-22 | 2010-02-03 | 中国电子科技集团公司第三十八研究所 | Wave-guide slot array in frequency-selective wideband |
| CN101814661A (en) * | 2009-11-20 | 2010-08-25 | 天津工程师范学院 | Trapezoidal waveguide slot array antenna unit |
| CN204333277U (en) * | 2014-12-09 | 2015-05-13 | 中国电子科技集团公司第三十八研究所 | Single cavity waveguide gap, broadband resonant antenna |
-
2014
- 2014-12-09 CN CN201410744296.8A patent/CN104505595B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5210543A (en) * | 1988-12-20 | 1993-05-11 | Hughes Aircraft Company | Feed waveguide for an array antenna |
| US20030001789A1 (en) * | 2001-05-31 | 2003-01-02 | Klaus Solbach | Slot antenna element |
| CN201397880Y (en) * | 2009-05-22 | 2010-02-03 | 中国电子科技集团公司第三十八研究所 | Wave-guide slot array in frequency-selective wideband |
| CN101814661A (en) * | 2009-11-20 | 2010-08-25 | 天津工程师范学院 | Trapezoidal waveguide slot array antenna unit |
| CN204333277U (en) * | 2014-12-09 | 2015-05-13 | 中国电子科技集团公司第三十八研究所 | Single cavity waveguide gap, broadband resonant antenna |
Non-Patent Citations (1)
| Title |
|---|
| WEI WANG等: "A Broadband Slotted Ridge Waveguide Antenna Array", 《IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION》 * |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107302404A (en) * | 2017-07-05 | 2017-10-27 | 西安交通大学 | Near-field coupling passive cross modulation test device based on square coaxial configuration |
| CN107302404B (en) * | 2017-07-05 | 2020-07-28 | 西安交通大学 | Near-field coupling passive intermodulation test device based on square coaxial structure |
| CN108539414A (en) * | 2018-03-29 | 2018-09-14 | 中国电子科技集团公司第三十八研究所 | A kind of compact-sized efficient and light weight slot antenna and antenna array |
| CN108539414B (en) * | 2018-03-29 | 2023-11-14 | 中国电子科技集团公司第三十八研究所 | Compact-structure light high-efficiency slot antenna and antenna array |
| CN109659684A (en) * | 2018-12-20 | 2019-04-19 | 中国科学院上海微***与信息技术研究所 | One kind leans forward double aperture slit antenna and preparation method thereof |
| CN109659684B (en) * | 2018-12-20 | 2024-01-19 | 中国科学院上海微***与信息技术研究所 | Forward-tilting double-slit antenna and manufacturing method thereof |
| CN109802240A (en) * | 2018-12-29 | 2019-05-24 | 南京信息职业技术学院 | A kind of circular polarisation slot antenna based on rectangular waveguide |
| CN109802240B (en) * | 2018-12-29 | 2024-04-02 | 南京信息职业技术学院 | Circular polarization slot antenna based on rectangular waveguide |
| CN111864377A (en) * | 2020-07-29 | 2020-10-30 | 中国电子科技集团公司第十四研究所 | Broadband collinear seam waveguide slot antenna |
| CN113782985A (en) * | 2021-08-19 | 2021-12-10 | 中国工程物理研究院应用电子学研究所 | High-power broadside longitudinal-slit waveguide slot array |
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