CN201397880Y - Wave-guide slot array in frequency-selective wideband - Google Patents
Wave-guide slot array in frequency-selective wideband Download PDFInfo
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- CN201397880Y CN201397880Y CN2009201721878U CN200920172187U CN201397880Y CN 201397880 Y CN201397880 Y CN 201397880Y CN 2009201721878 U CN2009201721878 U CN 2009201721878U CN 200920172187 U CN200920172187 U CN 200920172187U CN 201397880 Y CN201397880 Y CN 201397880Y
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Abstract
The utility model relates to a wave-guide slot array in the frequency-selective wideband, solving the problem in the present wave-guide slit antenna that the capability for resisting the external interference of the frequency band is poor. The wave-guide slot array comprises an radiating guide, a feed waveguide, a coaxial connector and a radiation slot, each of the radiating guide and the feed waveguide is a waveguide with a rectangle metal ridge and closed terminals, the metal ridges are arranged on a central line of the base, the coaxial connector is located at the center position at the bottom of the feed waveguide, more than three grooves are symmetrically arranged on the metal ridge of a power feed ridge waveguide between the coaxial connector and the coupled slots at both sides, an integral structure has a stack shape of city wall, and two wave-guide lost foam filters with the same structure are formed, and the straight waveguide segment of each of two output arms of a 3dB powersplitter is provided with a wave-guide lost foam filter. According to the utility model, the external signal of the operation frequency band is prevented to disturb the antennae, moreover, the wave-guide slot array has the advantages: small wastage, reduced weight, no additional apparatus, high reliability and compact structure.
Description
Technical field
The utility model relates to the architecture advances of Waveguide slot resonant aerial battle array, specifically is a kind of frequency-selective broadband waveguide slot antenna array.The utility model both can be used for receiving, also can be used for emitting radio wave.At military aspect, can be used as the terminal antenna of broadband, anti-interference phased array radar system.Aspect civilian, can be used as the antenna for base station of polarization diversity communication etc.
Background technology
Along with the fast development of using with demand, the utilization of electromagnetic spectrum is expanded greatly and is fully used, and more and more show crowded to capacity.On the one hand, it is more and more to work in the electronic equipment of each frequency; On the other hand, spaces such as some platforms such as naval vessel, aircraft and satellite are restricted; In addition, the frequency band of portions of electronics equipment requires more and more wideer.Under this high density frequency spectrum situation, make the electromagnetic environment very severe of each electronic equipment, therefore emc issue such as when each electronic system of design, all to consider to disturb and anti-interference.
In addition, based on the restriction of carrying platform, under the certain situation weight of electronic equipment, volume, power consumption etc. all there is specific (special) requirements, in the particularly various radar systems, therefore the antenna proportion is bigger, it is carried out loss of weight, section compression, raises the efficiency with integrated design and be very important.
In the application of array antenna, radiating antenna is selected microstrip antenna or Waveguide slot antenna usually, both respectively have pluses and minuses, select which kind of form, need require comprehensive compromise consideration to aspects such as antenna volume, weight, efficient, bandwidth, machinery, temperature or even heat conduction according to system.
Wave guide slot array antenna is because it is efficient, be easy to the width of cloth controls, processes factor such as simple mutually and widely applied, particularly radar system.The Waveguide slot battle array has two kinds of capable ripple battle array and standing-wave arrays (resonance battle array), the former broader bandwidth, have and frequently sweep characteristic, but efficient is low slightly, is suitable for large-scale planar array; Latter's efficient height, but narrow bandwidth are applied in the less antenna array of size usually.
For Waveguide slot resonance battle array, bandwidth is subjected to the restriction of unit number, and (horse increases. Ha Madala, waveguide slot array wideband frequency restriction in parallel, international IEEE-Antennas And Propagation journal, Vol.37,1989, pp:817-823./M.Hamadallah, Frequency limitations on broad-band performance ofshunt slot arrays, IEEE Trans Antennas Propagat Vol.37,1989, pp:817-823.), unit number bandwidth more at most is narrow more.We are making fruitful work (1. Wang Wei, Qi Meiqing, Jin Mouping, " waveguide slit resonance battle array bandwidth research in parallel ", modern electronic technology/supplementary issue, 2006.9, pp:178-180 aspect the broadband research of Waveguide slot resonance battle array; 2. Wang Wei, clock up time, Qi Meiqing, Liang Xianling, ridge waveguide feed wideband ridge waveguide slot array back-to-back, microwave and optical tech wall bulletin, 2005,45 (2): 102-104/Wang Wei, Zhong Shun-Shi, Qi Mei-Qingand Liang Xian-Ling, Broadband ridged waveguide slot antenna array fed byback-to-back ridged waveguide, Microwave and Optical Tech.Lett., 2005,45 (2): 102-104; 3. Wang Wei, wide-band printing antenna and dual-polarized, microstrip and wave guide slot array antenna, doctor's thesis, 2005.2).In these researchs, Waveguide slot resonance battle array bandwidth is expanded mainly to depend on and is adopted the submatrix method for designing, by power splitter each submatrix feed is encouraged, thereby reaches the purpose that reduces unit number.Also adopted integrated method for designing between feed waveguide and the radiating guide in the design, made the compression of antenna array section, compact conformation.
For the solution of emc issue between the electronic system, usual way is to add filter, increases space isolation thereby perhaps increase by two kinds of space lengths between the equipment.The former uses more in microwave system, for example for the curb transmitter parasitic disturbances, add Lou wall type filter (Zhang Yijiang, Wang Xiaolu, Li Lei at the transmitter output, ridge waveguide leaks the shortcut calculation of wall type filter, radar science and technology, 2007,5 (5): 394-396), or, add filter etc. at system receiving terminal in order to suppress of the interference of other signal to native system.Wherein, filter is of a great variety, divide with the transmission line form, mainly comprise waveguide filter, strip line filter, microstrip filter, cavity body filter or the like, in actual design, require to select suitable filter type according to system's telecommunication and mechanical interface.The Q value of microstrip filter resonant cavity is lower, brings the insertion loss bigger; Coaxial cavity filter is mainly used in the lower frequency range of microwave frequency, and loss is bigger; The filter insertion loss of strip lines configuration is lower than microstrip structure; Various filters are compared, waveguide filter loss minimum (add Loews Australia. You E, waveguide component-theory in the antenna-feedback system and computer-aided design, 1993/Jaroslaw Uher, WaveguideComponents for Antenna Feed Systems:Theory and CAD, Artech House, 1993), for example document (letter. Bonn is graceful, Fu Ruisi. A Dete, ridge waveguide eigenvalue problem transverse resonance, standing wave and resonance formula reach the application at E face fin waveguide filter, international IEEE-microwave theory and technique journal, Vol38 (8), 1990, pp:1104-1113/Jens Bornemann, and Fritz Arndt, Transverse Resonance, Standing Wave, and Resonator Formulations of the Ridge Waveguide EigenvalueProblem and Its Application to the Design of E-Plane Finned Waveguide Filters, IEEE Trans.On MTT, Vol38 (8), 1990, pp:1104-1113) 3 grades of disappearance mode filters of Ku wave band of design experiment in, the band internal loss is 0.2dB only.Because the advantage of waveguide filter low-loss and high power capacity, therefore such filter is widely used in (Wei Sente. En Boruia in the equipment such as spaceborne communication and radar, the special. Ji Mennuo of capital and interest, waveguide filter in the satellite application, international IEEE-microwave magazine, 2007.10, pp:60-70/Vicente E.Boriaand Benito Gimeno, Waveguide Filters for Satellites, IEEE MicrowaveMagazine, Oct., 2007, pp:60-70).For the method that increases the space length between the electronic equipment, to cause the whole system structure, volume, the sacrifice of aspects such as weight, the narrow and small situation of mounting platform particularly, as in satellite-borne synthetic aperture radar (SAR), pass the interference of antenna in order to solve number to the SAR system, will count the biography antenna and stretch out nearly about 3 meters (the M. Si Tane of satellite platform by deployed configuration, R. Wo Ninghaosi, R. prick grace, X-band ground observation synthetic aperture radar active phase array antenna, international phased array system in 2003 and technical conference, the U.S., Boston, in October, 2003, pp:70-75/M.Stangle, R.Werninghaus, and R.Zahn, The TerrSAR-X Active Phased Array Antenna, IEEEInternational Symposium on Phased Array Systems and Technology 2003, Boston, USA, Oct., 2003, pp:70-75), so not only cause the increase of weight, also increased the design difficulty and system failure point, reduced the reliability of system.
In a word, with regard to present Waveguide slot antenna,, all do not consider the outer inhibit feature of band, that is, do not possess the outer interference performance of anti-band no matter be arrowband or The Wide-Band Design.In the system of anti-interference requirement, only be to install antenna and filter cascade simply by machinery, both are separate equipment separately, have big inferior position at aspects such as volume, weight, installations, and this is particularly outstanding in such as airborne and spaceborne electronic apparatus application.
The utility model content
In order to solve the problem that resists outer interference performance difference of existing Waveguide slot antenna, the utility model provides a kind of frequency band coupling transmission that realizes native system work, and other frequency band does not transmit, and can eliminate the frequency-selective broadband waveguide slot antenna array that disturbs outside the work zone.
The utility model is realized frequency selectivity by architecture advances on the basis of the wave guide slot array antenna of existing broadband feature, concrete architecture advances technical scheme is as follows:
Frequency-selective broadband waveguide slot antenna array comprises radiating guide, feed waveguide and coaxial connector;
Described radiating guide adds the rectangular metal radiation ridge waveguide of metal ridge, terminal sealing for symmetry, the uniform vertical elongated radiation slit that is provided with that interlock, the both sides of radiation ridge waveguide broadside center line, radiation ridge waveguide and radiating slot formation Waveguide slot resonant antenna; The wave guide wall of radiating guide by the metal radiation ridge waveguide in the middle of it separates and constitutes two independently cavitys, described Waveguide slot resonant antenna is divided into two identical parts, i.e. two sub-array antennas; Described feed waveguide is similarly the rectangular metal feed ridge waveguide that symmetry adds metal ridge, terminal sealing, be arranged in parallel with radiating guide is folded mutually up and down, link to each other by coupling slit 6 between described feed ridge waveguide and the radiation ridge waveguide, two identical submatrix antennas are carried out centre feed; Described coaxial connector is positioned at the following centre position of feed waveguide, its inner wire gos deep into described feed ridge waveguide cavity, contacts with feed waveguide cavity upper wall, and coaxial connector and feed ridge waveguide constitute T shape structure, constitute a 3dB power splitter, i.e. constant power distributor; Its improvement is:
Be arranged with the groove more than three on the metal ridge of the feed ridge waveguide between described coaxial connector and the coupling slit, both sides, overall structure is city wall buttress shape, has constituted waveguide disappearance mode filter.
Described waveguide disappearance mode filter on the straight wave guide section of two output arms of 3dB power splitter, on one side one, totally two, identical on the structure; Waveguide disappearance mode filter structurally is characterized by the straight wave guide section that the feed metal ridge is pier shape, and the straight wave guide section of metal ridge groove is the waveguide impedance reverser, and alternate ridge waveguide section wherein is waveguide resonator, constitutes waveguide filter together.
Be arranged with 3-7 bar groove on the metal ridge of the feed ridge waveguide of described coaxial connector both sides, filter order is the waveguide resonator number, can be chosen in the 2-6 level, by antenna interference signal frequency and inhibition degree is determined.
The utility model compared with prior art has following conspicuous outstanding substantive distinguishing features and remarkable advantage:
Make full use of the straight wave guide section of the feed single ridged waveguides of broadband waveguide slot antenna array, on metal ridge, open a plurality of grooves simply, constitute band pass filter, on original antenna broadband performance basis, realized inhibit feature outside the working band, have antijamming capability.This filter can be selected 2-6 level resonator according to actual needs, the band of realizing about 15-60dB suppresses outward, compare with other filter of equal inhibition degree, the waveguide filter in-band insertion loss is little, as: following X-band filter, when number biography frequency range inhibition degree was 30dB, the waveguide filter in-band insertion loss was in 0.2dB, and the mini filter (placing T/R assembly receive path) of employing microstrip structure will bring the insertion loss greater than 1.2dB;
This antenna only cuts out a plurality of grooves on the metal ridge of feed waveguide in former broadband waveguide slot antenna, do not increase supernumerary structure, does not therefore increase the antenna difficulty of processing.
Owing on metal ridge, open a plurality of grooves, reduced metal solid in the antenna array, reduced single wave guide slot array antenna weight, the method that is connected the independent wave guide filter with independent broadband waveguide slot antenna is compared, weight saving about 10%, this is in the large-scale satellite-borne synthetic aperture radar active phase array antenna that has several thousand described antennas compositions, and weight saving is obvious.
Because the realization of the utility model broadband anti-interference antenna makes some various electronic (particularly many antennas) be installed under the situation of the confined space, Electro Magnetic Compatibility is improved.Typical case's application example is the interference problem between X-band satellite-borne synthetic aperture radar (SAR) and X-band number pass, because the use of this antenna, total biography antenna is effectively suppressed to the interference of SAR system, this antenna applications passes antenna electromagnetic Compatibility Design method with the SAR antenna of routine and number and compares and (1. will count and pass antenna and stretch out about 3 meters by folding and expanding mechanism in satellite-borne SAR; 2. between T/R assembly and antenna, add independently filter; 3. the receive path at the T/R assembly adds filter; Or first kind of use that combines with second and third kind method), has following advantage: for first kind of existing scheme, number can be passed antenna near the SAR antenna, need not to stretch out structure, reduced the structural design difficulty of several biography antennas, reduce the feeder loss of several biography antennas, alleviated the weight of several biography antennas; For second kind of existing scheme, because filter is integrated among the antenna, need not independently filter, therefore reduced the weight of whole satellite payload, reduced the device tie point, reduced the quantity of system failure point; For the third scheme, consideration based on structural volume and the integrated aspect of circuit, filter that receive path adds at the T/R assembly need adopt microstrip structure, and want miniaturization, therefore loss is big, and increases T/R component design difficulty, in addition, although adopt miniaturization microstrip filter structure, still increased the volume and weight of T/R assembly.Adopt antenna described in the utility model thoroughly to address the above problem, in sum, the SAR system that has used broadband described in the utility model anti-interference antenna battle array compares with conventional X-band SAR system, realized suppressing the interference that number passes antenna, had simultaneously that loss is little, an advantage of weight reduction, no extras, reliability height and compact conformation.
Description of drawings
Fig. 1 is the utility model antenna overall appearance design sketch;
Fig. 2 is the longitudinal sectional drawing of the utility model secondary filter antenna;
Fig. 3 is the longitudinal sectional drawing of the utility model Pyatyi filter antenna;
Fig. 4 is the B-B cutaway view of Fig. 2;
Fig. 5 is the C-C cutaway view of Fig. 3;
Fig. 6 is the A-A cutaway view of Fig. 2;
Fig. 7 is that Pyatyi filter antenna embodiment described in the utility model and traditional antenna input port reflection loss compare;
Fig. 8 is that Pyatyi filter antenna embodiment described in the utility model and traditional antenna gain are compared.
Embodiment
Below in conjunction with accompanying drawing, the utility model is further described by embodiment.
Embodiment 1:
Referring to Fig. 1, Fig. 3, Fig. 5 and Fig. 6, a preferred embodiment is the equally distributed 16 unit wave guide slot array antennas (Pyatyi filter antenna) that work in X-band, and the operating frequency of antenna scope is f
L～f
H, f wherein
LBe low-limit frequency, f
HBe highest frequency, f
0Be centre frequency, the stopband upper side frequency is f
S
Antenna array comprises radiating guide 1, feed waveguide 2, coaxial connector 3 and radiating slot 4 and forms, as shown in Figure 1.
Feed waveguide 2 is for being the rectangular metal ridge waveguide pipe that terminal sealing, inside add ridge equally, and metal ridge 5b is positioned on the center line of base, shown in Fig. 3 and 6.
The input of described antenna array, output port are the coaxial connector 3 of coaxial configuration, and present embodiment is preferably 50 ohm the commercial connector of SMA.Coaxial connector and feed wave crest are led and are constituted T shape structure, and its inner wire stretches in the feed waveguide 2 and links to each other with the waveguide upper wall, shown in Fig. 3 and 6, realizes the 3dB power splitter electrically, and two output arms are the feed ridge waveguide, shown in Fig. 1,3 and 6.
16 radiating slot 4 staggered radiating guide 1 broadside center line both sides that are positioned at, radiating slot 4 is vertically thin rectangle slit or round end rectangular elongate seam, as shown in Figure 1.16 unit Waveguide slots constitute two independently submatrixs by vertically being divided into identical two groups, and two submatrixs are by middle section mirror image symmetry, as shown in figures 1 and 3.
Be connected by coupling slit 6 between feed waveguide 2 cavitys and radiating guide 1 cavity, as shown in Figure 3.
On the metal ridge 5b of described feed waveguide 2, respectively have 6 grooves between coaxial connector 3 and coupling slit 6, both sides, alternate short metal ridge wherein has 5, and overall structure is city wall buttress shape, has constituted waveguide disappearance mode filter, as Fig. 3 and shown in Figure 5.The waveguide segment of metal ridge cut-in groove is characterized by the waveguide impedance reverser, and the alternate waveguide segment that wherein has short metal ridge is characterized by waveguide resonator, and the waveguide resonator number is represented filter order, and these structures link to each other and constitute 5 grades of waveguide filters.
Described waveguide filter on two output arms of 3dB power splitter one on one side, totally two, shown in Fig. 3 and 5.
Concrete parameter is determined as follows:
According to operating frequency range, antenna space scan angle or structural limitations etc. spatial dimension, determine the width of Waveguide slot antenna.In design, the radiating slot unit interval is a restrictive condition graing lobe not occur, selects 0.77 λ in the present embodiment
0In addition, because in the resonance battle array, the spacing between the radiating slot must satisfy λ
G0Therefore/2 conditions, by the longitudinal pitch between the selected radiating slot, determine the guide wavelength λ of work centre frequency in the radiating guide
G0, and then the height of definite radiating guide height and metal ridge.
Radiating slot 4 length approximate 1/2nd wavelength, and the present embodiment preferred size is 0.475 λ
0, stitch wide longly much smaller than seam, preferred size is that 1/10th seams are long; The slit offset position by piecemeal after submatrix unit number and standing-wave ratio require to determine that present embodiment is preferably 0.016 λ
0The linear array terminal is apart from last slit λ
G0The short circuit of/4 places.
Choosing of feed ridge waveguide width is identical with radiation ridge waveguide width, and duct height and metal ridge height are condition to satisfy the passband electromagnetic wave propagation, specifically selects waveguide cutoff frequency to be positioned at the following frequency f of 0.8 times of working band
L, coupling slit 6 is 0.5 λ with feed waveguide terminal short circuit interplanar distance
G0
The concrete CALCULATION OF PARAMETERS method of above antenna is known by this professional designer.
5 grades of filter size in the present embodiment are obtained by conventional single ridged waveguides disappearance mode filter method for designing simulation calculation, and this method is known by this professional designer.Present embodiment is preferably: L1=0.098 λ
0, L2=0.248 λ
0, L3=0.304 λ
0, W1=0.154 λ
0, W2=0.107 λ
0, W3=0.104 λ
0The parameter W0 that wherein characterizes filter location does not have strict demand, and it is middle with coupling slit 6 to select to make filter to be positioned at coaxial connector 3 usually, and present embodiment is preferably 0.61 λ
0
Fig. 7 is that the frequency selectivity antenna array and the conventional antenna array port reflection loss of 5 grades of filtering described in the utility model compares, and the frequency selectivity antenna array is being lower than f
sThe interference band of frequency shows as total reflection, and conventional antenna array does not have this performance, and the utility model antenna array has good frequency selectivity as can be seen.
Fig. 8 is antenna described in the utility model and conventional antenna array yield value, and the utility model antenna gain is slightly less than conventional antenna in passband, in 0.4dB, is lower than more than the passband 50dB at stop band gain, illustrates interference signal is had inhibition greater than 50dB.
Embodiment 2:
Referring to Fig. 2, Fig. 4 and Fig. 6, work in X-band, equally distributed 16 unit wave guide slot array antennas (secondary filter antenna), on the metal ridge 5b of feed waveguide 2, between coaxial connector 3 and coupling slit 6, both sides, respectively have 3 grooves, shown in Fig. 2 and 4, alternate short metal ridge wherein has 2, i.e. 2 grades of filters.Present embodiment median filter size and location parameter are preferably: L1=0.171 λ
0, L2=0.252 λ
0, W0=1.74 λ
0, W1=0.168 λ
0
Other is with embodiment 1.
Above content is the detailed description of the utility model being done in conjunction with concrete preferred implementation, can not assert that the concrete enforcement of the utility model only limits to these explanations.For the utility model person of ordinary skill in the field; under the prerequisite that does not break away from the utility model design; can also make some simple deduction or replace; radiating guide and the integrated broadband waveguide slot antenna of feed waveguide as rectangle or other shape waveguide formation; the waveguide filter of forms such as integrated E face filter, corrugated waveguide filter in feed waveguide all should be considered as belonging to the utility model protection scope that the utility model is determined by claims of being submitted to.
Claims (3)
1, frequency-selective broadband waveguide slot antenna array comprises radiating guide, feed waveguide and coaxial connector;
Described radiating guide adds the rectangular metal radiation ridge waveguide of metal ridge, terminal sealing for symmetry, the uniform vertical elongated radiation slit that is provided with that interlock, the both sides of radiation ridge waveguide broadside center line, radiation ridge waveguide and radiating slot formation Waveguide slot resonant antenna; The wave guide wall of radiating guide by the metal radiation ridge waveguide in the middle of it separates and constitutes two independently cavitys, described Waveguide slot resonant antenna is divided into two identical parts, i.e. two sub-array antennas; Described feed waveguide is similarly the rectangular metal feed ridge waveguide that symmetry adds metal ridge, terminal sealing, be arranged in parallel with radiating guide is folded mutually up and down, link to each other by the coupling slit between described feed ridge waveguide and the radiation ridge waveguide, two identical submatrix antennas are carried out centre feed; Described coaxial connector is positioned at the following centre position of feed waveguide, its inner wire gos deep into described feed ridge waveguide cavity, contacts with feed waveguide cavity upper wall, and coaxial connector and feed ridge waveguide constitute T shape structure, constitute a 3dB power splitter, i.e. constant power distributor; It is characterized in that:
Be arranged with the groove more than three on the metal ridge of the feed ridge waveguide between described coaxial connector and the coupling slit, both sides, overall structure is city wall buttress shape, has constituted waveguide disappearance mode filter.
2, frequency-selective broadband waveguide slot antenna array according to claim 1 is characterized in that:
Described waveguide disappearance mode filter on the straight wave guide section of two output arms of 3dB power splitter, on one side one, totally two, identical on the structure.
3, frequency-selective broadband waveguide slot antenna array according to claim 1 and 2 is characterized in that:
Be arranged with the groove of 3-7 bar on the metal ridge of the feed ridge waveguide of described coaxial connector both sides.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2009201721878U CN201397880Y (en) | 2009-05-22 | 2009-05-22 | Wave-guide slot array in frequency-selective wideband |
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| CN102403573A (en) * | 2011-11-09 | 2012-04-04 | 华南理工大学 | Reconfigurable waveguide mixed slot antenna based on S-PIN diode |
| CN104505595A (en) * | 2014-12-09 | 2015-04-08 | 中国电子科技集团公司第三十八研究所 | Wideband single-cavity waveguide slot resonant antenna |
| CN104577347A (en) * | 2014-12-03 | 2015-04-29 | 中国电子科技集团公司第三十八研究所 | Dual-band multi-polarization common-caliber waveguide slot antenna |
| CN105281042A (en) * | 2014-07-16 | 2016-01-27 | 中电科微波通信(上海)有限公司 | Slotted waveguide antenna, signal transmission device and signal continuous transmission system |
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| CN113451759A (en) * | 2021-07-09 | 2021-09-28 | 中国电子科技集团公司第三十八研究所 | Light waveguide antenna array based on virtual metal wall |
| CN114069244A (en) * | 2022-01-07 | 2022-02-18 | 成都国星宇航科技有限公司 | Circularly polarized waveguide slot antenna for satellite |
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| CN102403573A (en) * | 2011-11-09 | 2012-04-04 | 华南理工大学 | Reconfigurable waveguide mixed slot antenna based on S-PIN diode |
| CN102403573B (en) * | 2011-11-09 | 2014-04-02 | 华南理工大学 | Reconfigurable waveguide mixed slot antenna based on S-PIN diode |
| CN105281042A (en) * | 2014-07-16 | 2016-01-27 | 中电科微波通信(上海)有限公司 | Slotted waveguide antenna, signal transmission device and signal continuous transmission system |
| CN105281042B (en) * | 2014-07-16 | 2023-06-23 | 中电科微波通信（上海）股份有限公司 | Crack waveguide antenna, signal transmission device and signal continuous transmission system |
| CN104577347A (en) * | 2014-12-03 | 2015-04-29 | 中国电子科技集团公司第三十八研究所 | Dual-band multi-polarization common-caliber waveguide slot antenna |
| CN104505595A (en) * | 2014-12-09 | 2015-04-08 | 中国电子科技集团公司第三十八研究所 | Wideband single-cavity waveguide slot resonant antenna |
| CN104505595B (en) * | 2014-12-09 | 2017-04-19 | 中国电子科技集团公司第三十八研究所 | Wideband single-cavity waveguide slot resonant antenna |
| CN107932685B (en) * | 2016-10-12 | 2020-09-18 | 辛北尔康普机器及成套设备有限责任公司 | Apparatus and method for manufacturing fibreboard or particle board |
| CN107932685A (en) * | 2016-10-12 | 2018-04-20 | 辛北尔康普机器及成套设备有限责任公司 | Continuous-type furnace for laser heating pressed material pad |
| EP3621148A3 (en) * | 2018-09-07 | 2020-07-15 | Deutsches Elektronen-Synchrotron DESY | High frequency range power amplifier |
| CN113451759A (en) * | 2021-07-09 | 2021-09-28 | 中国电子科技集团公司第三十八研究所 | Light waveguide antenna array based on virtual metal wall |
| CN113451759B (en) * | 2021-07-09 | 2022-08-26 | 中国电子科技集团公司第三十八研究所 | Light waveguide antenna array based on virtual metal wall |
| CN114069244A (en) * | 2022-01-07 | 2022-02-18 | 成都国星宇航科技有限公司 | Circularly polarized waveguide slot antenna for satellite |
| CN114069244B (en) * | 2022-01-07 | 2022-04-26 | 成都国星宇航科技有限公司 | Circularly polarized waveguide slot antenna for satellite |
| CN115458910A (en) * | 2022-08-22 | 2022-12-09 | 四川大学 | Modular dual-frequency AMC load filtering antenna manufactured in combination with 3D printing and PCB mode |
| CN115954669A (en) * | 2022-12-29 | 2023-04-11 | 西安电子科技大学 | Polarization isolation frame of dual-polarization waveguide slot phased array |
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