CN116780208A - Phased array antenna with low scattering sidelobe and excellent radiation characteristics - Google Patents
Phased array antenna with low scattering sidelobe and excellent radiation characteristics Download PDFInfo
- Publication number
- CN116780208A CN116780208A CN202310549856.3A CN202310549856A CN116780208A CN 116780208 A CN116780208 A CN 116780208A CN 202310549856 A CN202310549856 A CN 202310549856A CN 116780208 A CN116780208 A CN 116780208A
- Authority
- CN
- China
- Prior art keywords
- phased array
- array antenna
- antenna
- radiation patch
- hole
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 230000005855 radiation Effects 0.000 title claims abstract description 57
- 239000002184 metal Substances 0.000 claims description 25
- 239000000523 sample Substances 0.000 claims description 14
- 230000002146 bilateral effect Effects 0.000 claims description 2
- 239000003989 dielectric material Substances 0.000 claims description 2
- 150000003071 polychlorinated biphenyls Chemical class 0.000 claims 1
- 230000009467 reduction Effects 0.000 abstract description 21
- 238000000034 method Methods 0.000 abstract description 16
- 238000005457 optimization Methods 0.000 abstract description 5
- 230000008569 process Effects 0.000 abstract description 4
- 238000007493 shaping process Methods 0.000 abstract description 4
- 239000010410 layer Substances 0.000 description 24
- 238000010586 diagram Methods 0.000 description 5
- FPWNLURCHDRMHC-UHFFFAOYSA-N 4-chlorobiphenyl Chemical compound C1=CC(Cl)=CC=C1C1=CC=CC=C1 FPWNLURCHDRMHC-UHFFFAOYSA-N 0.000 description 4
- 238000003491 array Methods 0.000 description 3
- 230000001629 suppression Effects 0.000 description 3
- NMWSKOLWZZWHPL-UHFFFAOYSA-N 3-chlorobiphenyl Chemical compound ClC1=CC=CC(C=2C=CC=CC=2)=C1 NMWSKOLWZZWHPL-UHFFFAOYSA-N 0.000 description 2
- 101001082832 Saccharomyces cerevisiae (strain ATCC 204508 / S288c) Pyruvate carboxylase 2 Proteins 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000002356 single layer Substances 0.000 description 2
- 230000033228 biological regulation Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000000969 carrier Substances 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000003475 lamination Methods 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 238000000691 measurement method Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000011295 pitch Substances 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
Landscapes
- Variable-Direction Aerials And Aerial Arrays (AREA)
Abstract
The invention discloses a phased array antenna with low scattering side lobes and excellent radiation characteristics, and belongs to the technical field of antenna engineering and radar stealth. The method combines load optimization and array shaping, reduces the single-station RCS side lobe level of the phased array antenna within a certain bandwidth and a certain angular domain range, and improves the antenna impedance matching characteristic and gain. The method expands the reduction of the normal incidence single-station RCS to the reduction of the RCS with a certain angle domain, optimizes the impedance matching characteristic of the phased array antenna and improves the gain while reducing the RCS by optimizing the feed structure. In addition, the antenna structure is easy to process, can be realized by using a simple multi-layer ground, and is easy to assemble; due to the design of the antenna itself, it also has a very low radiation lobe level.
Description
Technical Field
The invention belongs to the technical field of antenna engineering and radar stealth, and relates to a shaped phased array antenna with simple structure, low scattering side lobes, low radiation side lobes and excellent impedance matching.
Background
In stealth applications, it is critical to reduce the RCS (radar cross section) of the device. Phased array antennas serve as terminals for today's phased array radars and also contribute most of the scattering, which becomes the bottleneck for RCS reduction. However, the RCS reduction method commonly used for ordinary scatterers is not applicable to in-band homopolar RCS reduction for phased array antennas. Such as covering reflective or absorptive metamaterials, would block the radiation of the phased array antenna itself; the metamaterial is loaded between the units, so that the unit spacing is increased, grating lobes are caused, and the array antenna cannot scan; the method for changing the shape of the radiator by the common antenna is not suitable for the phased array antenna due to the influence of the size of the array unit and the mutual coupling among the array elements.
The most commonly used in-band homopolarization RCS reduction method of the phased array antenna at present is to cancel the scattering field of the antenna structure item or realize the cancellation of the scattering fields of different units by changing the scattering field of the load regulation mode item of the antenna unit. The implementation of the load may take many forms; as In the document "In-band scattering and radiation tradeoff of broadband phased arrays based on scattering-matrix approach", a method of optimizing a coaxial line for feeding is adopted; in the document "RCS synthesis of array antenna with circulators and phase shifters and measurement method for deterministic RCS reduction", a method of adding a phase shifter, a power amplifier, or the like as an active loop is adopted; in the document "In-band SCS reduction of microstrip phased array based on impedance matching network", a stripline matching network is employed. However, the greatest difficulty in reducing the in-band homopolar RCS of a phased array antenna is how to reduce the RCS while maintaining good radiation characteristics of the antenna, and phased array antennas in these documents sacrifice certain radiation characteristics while reducing the RCS, with concomitant degradation of standing waves or gain reduction.
In addition, most current literature for phased array antenna RCS reduction focuses on single station RCS reduction at normal co-polarized incidence. The normal RCS of a planar phased array tends to be highest because the fringe fields of all the elements are superimposed in phase in that direction. The design of the structure is a crucial part of reducing the scattering of the device, so that in practice phased array antenna carriers tend to deviate the direction of threat from normal by the design of the shape, in which case the scattering flap reduction over a range of angular fields is more meaningful than normal single station RCS reduction, whereas most literature focuses on normal incidence RCS reduction. In document "Optimum spatial arrangement of array elements for suppression of grating-lobes of radar cross section", a method of optimizing the phased array antenna element position to achieve scattering grating lobe suppression is proposed. However, this approach is applicable to arrays with large cell pitches, and for compact arrays with wide angle scanning capabilities per se, there is no grating lobes and no suppression is required.
Disclosure of Invention
The invention provides a C-band shaped phased array antenna with a simple structure based on the background technology. The invention adopts the lamination patch to increase the bandwidth of the antenna; the low-radiation side lobe and the preliminary reduction of the scattering side lobe level of the phased array antenna are realized through the tapered phased array antenna appearance; by optimizing the load of the phased array antenna unit, the impedance matching characteristic is improved, and the scattering sidelobe level is further reduced; the antenna has the advantages of simple structure, low cost and easy realization, the required three-layer PCB board only needs a single-layer process and has portability, and scattering reduction (such as side lobe reduction in different angle ranges) with different functions can be realized only by replacing the multi-layer floors with different through hole sizes.
The invention adopts the technical scheme that: a phased array antenna having a low scattering lobe and excellent radiation characteristics, the phased array antenna being composed of a plurality of unit antennas arranged in an array, each unit antenna comprising, from top to bottom: a wide angle matching layer, a radiation patch layer, a multilayer board feed layer and a probe;
the wide angle matching layer includes: a first PCB board;
the radiation patch layer sequentially comprises the following components from top to bottom: the first radiation patch, the second PCB, the second radiation patch and the third PCB; the first radiation patch is arranged on the upper surface of the second PCB; the second radiation patch is arranged on the upper surface of the third PCB; the area of the second radiation patch is larger than that of the first radiation patch;
the multilayer board feed layer includes from top to bottom in proper order: a first metal floor, a first through hole, a second metal floor, a second through hole, a third metal floor, a third through hole, a fourth metal floor, a fourth through hole, a fifth metal floor, and a fifth through hole;
the probe penetrates through the first through hole, the second through hole and the third PCB in the first metal floor, the second through hole and the third PCB in the second metal floor feed power to a second radiation patch on the upper surface of the third PCB, the power feeding position is the edge of the second radiation patch, the second radiation patch comprises an edge part and a center part, and the center part coincides with the first radiation characteristic when overlooking; the first through fifth through holes are filled with dielectric materials or air;
the phased array antenna is composed of units with different first to fifth through hole radiuses, and low scattering and good array impedance matching characteristics are achieved by optimizing the through hole sizes;
the phased array antenna top view bilateral symmetry is the shuttle type that the centre is wide both sides are narrow, and the probe feed position of the unit antenna in phased array antenna symmetry axis left side is the left side edge of second radiation paster, and the probe feed position of the unit antenna in phased array antenna symmetry axis right side is the right side edge of second radiation paster.
Further, the materials of the first PCB and the second PCB are Rogers 5880, the dielectric constant is 2.2, and the thickness is 2mm; the first radiation patch is square with side length of 10mm, the second radiation patch is square with side length of 13.5mm, and the thicknesses of the first to fifth metal floors 4 to 8 are 7mm, 1.5mm and 1.5mm in sequence.
The array of the invention scans in the angle range of 5.5-7.5 GHz (30.8%) bandwidth and E face + -45 DEG, the side lobe level is lower than-25 dB, and the active reflection coefficient of the array element is generally lower than-7 dB; the scattering peak value is 34.5dB lower than the normal single station RCS of the same size ground within the working bandwidth and the E-plane incidence angle range of 10-30 degrees and-30-10 degrees, and is 8.8dB lower than the traditional phased array antenna (the rectangular unit feed is a common 50 ohm coaxial line).
Drawings
Fig. 1 is a 3D schematic diagram of an antenna unit according to an embodiment of the invention; .
Fig. 2 is a schematic diagram of a phased array antenna in an embodiment of the invention; wherein fig. (a) is a 3D view of the multilayer structure, fig. (b) is a side view of the multilayer structure, and fig. (c) is a top view.
Fig. 3 is a schematic diagram of amplitude tapering and cell number distribution of different columns of a phased array antenna along the x-direction in an embodiment of the invention.
Fig. 4 is a graph showing average active reflection coefficients of a phased array antenna at different scan angles in accordance with conventional and inventive embodiments.
Fig. 5 is a gain pattern of a phased array antenna at different scan angles for conventional and embodiments of the present invention, where (a) is a conventional phased array antenna; (b) is a phased array antenna of the present invention.
Fig. 6 is a side-view gain of a phased array antenna in accordance with conventional and inventive embodiments.
FIG. 7 is a graph of the contour of a single station RCS of a phased array antenna as a function of frequency and angle of incidence for a conventional phased array antenna in accordance with an embodiment of the present invention; (b) is a phased array antenna of the present invention.
Fig. 8 is a graph showing the in-band RCS peak of a phased array antenna as a function of different angles of incidence in conventional and inventive embodiments.
Fig. 9 is a side view of a multilayer structure of the present invention.
Detailed Description
In this embodiment, the schematic diagram of the unit structure is shown in fig. 1, and the views of 3d are shown in fig. 1, respectively; cell size 20X 20mm 2 The working frequency is 5.5-7.5 GHz. The antenna is divided into three layers from top to bottom, and the three layers are as follows: a wide angle matching layer, a radiation patch layer and a multilayer board feed layer; the total three layers of PCB comprise a wide angle matching layer and a radiation patch layer, the materials of the PCB are Rogers 5880, the dielectric constant is 2.2, and the thickness is 2mm; in the embodiment, the multilayer board feed layer consists of five layers of metal floors;
the wide-angle matching layer is a first PCB (printed Circuit Board) 1;
the radiation patch layer includes: the first radiation patch 21, the second PCB 2, the second radiation patch 31, the third PCB 3 and the probe 32; the first radiation patch 21 is arranged on the upper surface of the second PCB 2 and is square with the side length of 10 mm; the second radiation patch 31 is arranged on the upper surface of the third PCB 3 and is square with a side length of 13.5 mm; the probe 32 passes through the third PCB 3.
The multilayer board feed layer includes: the first metal floor 4, the first through hole 43, the second metal floor 5, the second through hole 53, the third metal floor 6, the third through hole 63, the fourth metal floor 7, the fourth through hole 73, the fifth metal floor 8, the fifth through hole 83, the probes 42, 52, 62, 72, 82. In this embodiment, the thicknesses of the first to fifth metal floors 4 to 8 are 7mm, 1.5mm, and 1.5mm in order.
The probes 42, 52, 62, 72, 82 pass through the first to fifth through holes 43, 53, 63, 73, 83 in the first to fifth metal floors 4 to 8, and the probes 32 pass through the third PCB 3 to contact with the second radiation patch 31 on the upper surface for feeding; probes 32, 42, 52, 62, 72, 82 are SMA joint cores; the SMA joint outer conductor is electrically connected to the lowermost ground 82; in the present embodiment, the first to fifth through holes 43, 53, 63, 73, 83 are directly filled with air.
In this embodiment, the shaped antenna array is shown in fig. 2,3d, side view, and top view, respectively, in fig. 2 (a), (b), and (c). The phased array antenna is in a tapered shape, and the unit distribution of different columns in the x direction of the phased array antenna is obtained through a Chebyshev comprehensive method, which is shown in fig. 3. The number of columns is 16 in total, and the comprehensive condition is that the side lobe level is lower than-25 dB; because the number of units is necessarily an integer, the ideal chebyshev distribution needs to be discretized, and finally the required number of units in each column is obtained.
In addition to array shaping, the feed network of each phased array antenna element in an embodiment needs to be optimized to further reduce the single station RCS side lobe level and improve array impedance matching. The optimal radius of the first to fifth through holes 43, 53, 63, 73, 83 is searched by using a Particle Swarm Optimization (PSO) algorithm, in-band RCS peak values of the phased array antenna when the phased array antenna is incident in an angle range of 10-30 degrees on an E (xoz) plane and average active standing waves when the phased array antenna is laterally shot, scanned to 30 degrees and scanned to 45 degrees are calculated in each step, and the optimization target is that the sum of the in-band RCS peak values and the average active standing wave peak values is the lowest.
In this embodiment, the shaped phased array antenna has 56 units, and the conventional phased array antenna is a 14×4 rectangular array, and each unit is connected to the same 50Ω coaxial feed. The average active reflection coefficient of the embodiment and the traditional phased array antenna is shown in fig. 4 when the E plane is scanned at 0-45 degrees, the phased array antenna in the embodiment has the characteristic of in-band more stable impedance matching, and the peak value of the average reflection coefficient is obviously lower than that of the traditional phased array antenna when the side-view, 30-degree scanning and 45-degree scanning are performed, and the average value is lower than-7 dB.
The radiation patterns of the present embodiment and the conventional phased array antenna are shown in fig. 5 when the E-plane is scanned by 0-45 °, and the phased array antenna in the embodiment has a very low radiation sidelobe level (about-25 dB) which is about 15dB lower than that of the conventional array.
The side-view gains of the present embodiment and the conventional phased array antenna are shown in fig. 6, and although the phased array antenna has the same array aperture and unit number, the phased array antenna gain is slightly higher in the embodiment, which is caused by better impedance matching characteristics.
The contour diagram of the single station RCS of the present embodiment and the conventional phased array antenna according to the frequency and the incident angle is shown in fig. 7, and the in-band scattering peaks of different angles of incidence are shown in fig. 8. It can be seen that the RCS of the embodiment antenna is much lower than conventional antennas over the operating bandwidth and optimized angle of incidence, with the two RCS level peaks of-28.5 dbm, -19.7 dbm, respectively, and the phased array antenna in this embodiment has a scattering sidelobe level reduction of 8.8dB. Note that the single station RCS peak at normal incidence for the same size metal floor is 6 dbm, and the embodiment antenna is reduced by 34.5dB on this basis.
In summary, the invention provides a phased array antenna with low RCS sidelobe level and excellent radiation characteristics by combining the method of array shaping and feed network optimization. In the aspect of radiation characteristics, the antenna scans a low sidelobe level with the range of-25 dB and good impedance matching characteristics in a considerable bandwidth (30.8%) and a scanning angle range (+ -45 ℃), and is remarkably improved compared with the traditional phased array antenna; in the aspect of scattering characteristics, in the working bandwidth and the E-plane incident angle range of 10 degrees-30 degrees and-30 degrees-10 degrees, the scattering peak value is lower than the normal single station RCS of the same-size ground by more than 34.5dB and is lower than the traditional phased array antenna by 8.8dB. In addition, the three-layer PCB required by the phased array antenna can be pressed by a single-layer process, and can realize scattering reduction with different functions by replacing the multi-layer floor, and the phased array antenna has the characteristics of simple structure, low cost and strong portability.
The method combines load optimization and array shaping, reduces the single-station RCS side lobe level of the phased array antenna within a certain bandwidth and a certain angular domain range, and improves the antenna impedance matching characteristic and gain. The method expands the reduction of the normal incidence single-station RCS to the reduction of the RCS with a certain angle domain, optimizes the impedance matching characteristic of the phased array antenna and improves the gain while reducing the RCS by optimizing the feed structure. In addition, the antenna structure is easy to process, can be realized by using a simple multi-layer ground, and is easy to assemble; due to the design of the antenna itself, it also has a very low radiation lobe level.
Claims (2)
1. A phased array antenna having a low scattering lobe and excellent radiation characteristics, the phased array antenna being composed of a plurality of unit antennas arranged in an array, each unit antenna comprising, from top to bottom: a wide angle matching layer, a radiation patch layer, a multilayer board feed layer and a probe;
the wide angle matching layer includes: a first PCB board;
the radiation patch layer sequentially comprises the following components from top to bottom: the first radiation patch, the second PCB, the second radiation patch and the third PCB; the first radiation patch is arranged on the upper surface of the second PCB; the second radiation patch is arranged on the upper surface of the third PCB; the area of the second radiation patch is larger than that of the first radiation patch;
the multilayer board feed layer includes from top to bottom in proper order: a first metal floor, a first through hole, a second metal floor, a second through hole, a third metal floor, a third through hole, a fourth metal floor, a fourth through hole, a fifth metal floor, and a fifth through hole;
the probe penetrates through the first through hole, the second through hole and the third PCB in the first metal floor, the second through hole and the third PCB in the second metal floor feed power to a second radiation patch on the upper surface of the third PCB, the power feeding position is the edge of the second radiation patch, the second radiation patch comprises an edge part and a center part, and the center part coincides with the first radiation characteristic when overlooking; the first through fifth through holes are filled with dielectric materials or air;
the phased array antenna is composed of units with different first to fifth through hole radiuses, and low scattering and good array impedance matching characteristics are achieved by optimizing the through hole sizes;
the phased array antenna top view bilateral symmetry is the shuttle type that the centre is wide both sides are narrow, and the probe feed position of the unit antenna in phased array antenna symmetry axis left side is the left side edge of second radiation paster, and the probe feed position of the unit antenna in phased array antenna symmetry axis right side is the right side edge of second radiation paster.
2. The phased array antenna with low scattering sidelobes and excellent radiation characteristics as claimed in claim 1, wherein said first and second PCBs are both Rogers 5880, have a dielectric constant of 2.2 and a thickness of 2mm; the first radiation patch is square with side length of 10mm, the second radiation patch is square with side length of 13.5mm, and the thicknesses of the first to fifth metal floors 4 to 8 are 7mm, 1.5mm and 1.5mm in sequence.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310549856.3A CN116780208B (en) | 2023-05-16 | 2023-05-16 | Phased array antenna with low scattering sidelobe and excellent radiation characteristics |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310549856.3A CN116780208B (en) | 2023-05-16 | 2023-05-16 | Phased array antenna with low scattering sidelobe and excellent radiation characteristics |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN116780208A true CN116780208A (en) | 2023-09-19 |
| CN116780208B CN116780208B (en) | 2024-04-16 |
Family
ID=87985035
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310549856.3A Active CN116780208B (en) | 2023-05-16 | 2023-05-16 | Phased array antenna with low scattering sidelobe and excellent radiation characteristics |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116780208B (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111525255A (en) * | 2020-06-10 | 2020-08-11 | 中国电子科技集团公司第五十四研究所 | Low-profile broadband wide-angle tightly-coupled antenna unit and array |
| CN112751184A (en) * | 2020-12-29 | 2021-05-04 | 电子科技大学 | Phased array antenna with high radiation efficiency and low scattering characteristic |
| CN112787098A (en) * | 2021-02-10 | 2021-05-11 | 西南电子技术研究所（中国电子科技集团公司第十研究所） | Two-dimensional circularly polarized wide-angle scanning phased array antenna |
| CN113889759A (en) * | 2021-09-29 | 2022-01-04 | 电子科技大学 | Thin-cloth phased array antenna with ultralow backscattering characteristic |
-
2023
- 2023-05-16 CN CN202310549856.3A patent/CN116780208B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111525255A (en) * | 2020-06-10 | 2020-08-11 | 中国电子科技集团公司第五十四研究所 | Low-profile broadband wide-angle tightly-coupled antenna unit and array |
| CN112751184A (en) * | 2020-12-29 | 2021-05-04 | 电子科技大学 | Phased array antenna with high radiation efficiency and low scattering characteristic |
| CN112787098A (en) * | 2021-02-10 | 2021-05-11 | 西南电子技术研究所（中国电子科技集团公司第十研究所） | Two-dimensional circularly polarized wide-angle scanning phased array antenna |
| CN113889759A (en) * | 2021-09-29 | 2022-01-04 | 电子科技大学 | Thin-cloth phased array antenna with ultralow backscattering characteristic |
Non-Patent Citations (1)
| Title |
|---|
| 屈天莹;夏冬玉;: "一种宽频带低副瓣阵列天线的工程应用研究", 中国电子科学研究院学报, no. 01, 20 February 2013 (2013-02-20) * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN116780208B (en) | 2024-04-16 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN111370860B (en) | Strong coupling ultra wide band phased array antenna based on interdigital resistive surface loading | |
| CN110323575B (en) | Dual-polarized strong-coupling ultra-wideband phased array antenna loaded by electromagnetic metamaterial | |
| CN109638477B (en) | Super-surface-loaded broadband low-sidelobe circularly polarized array antenna | |
| CN111883910B (en) | Dual-polarized low-profile magnetoelectric dipole antenna and wireless communication equipment | |
| CN112072294B (en) | Broadband low-profile high-isolation dual-circular-polarization two-dimensional wide-angle scanning sparse array | |
| CN108631069B (en) | Ultra-wideband vertical polarization end-fire phased array capable of integrally burying cavity | |
| CN113851833B (en) | Grating lobe suppression wide-angle scanning phased array based on directional diagram reconfigurable subarray technology | |
| CN112751184B (en) | Phased array antenna with high radiation efficiency and low scattering characteristic | |
| CN114069257B (en) | Ultra-wideband dual-polarized phased array antenna based on strong coupling dipoles | |
| CN109193152B (en) | Low-loss frequency scanning antenna planar array based on mixed feed structure in limited bandwidth | |
| CN109728440B (en) | Planar broadband lens antenna based on transceiving structure form | |
| CN113871865A (en) | Low-profile broadband wide-angle two-dimensional scanning dual-polarization phased array antenna and application | |
| CN113889759B (en) | Thin-cloth phased array antenna with ultralow backscattering characteristic | |
| CN209822857U (en) | Novel tightly-fed broadband dual-polarization butterfly-shaped oscillator | |
| CN115084872B (en) | Ultra-wide bandwidth scanning angle tight coupling phased array antenna | |
| CN116780208B (en) | Phased array antenna with low scattering sidelobe and excellent radiation characteristics | |
| CN116526134A (en) | Wide-beam differential feed interdigital array antenna | |
| CN114336043B (en) | Miniaturized integrated phased-array antenna and design method thereof | |
| CN115810917A (en) | Satellite-borne Ka-band circularly polarized antenna unit, antenna array and phased array | |
| CN115799819A (en) | Millimeter wave wide beam circular polarization double-layer microstrip patch antenna | |
| Moulder | Novel implementations of ultrawideband tightly coupled antenna arrays | |
| CN112701471A (en) | All-dielectric integrated ultra-wideband low-profile polymorphic conformal phased array antenna | |
| CN220873842U (en) | Antenna device and radar equipment | |
| CN111129723B (en) | Broadband dual-polarized array antenna unit | |
| CN113097712B (en) | Phased array antenna made of wide-angle scanning electric dipole phased array antenna unit |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |