CN211957883U - Dual-polarization phased array antenna and dual-polarization phased array weather radar - Google Patents
Dual-polarization phased array antenna and dual-polarization phased array weather radar Download PDFInfo
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- CN211957883U CN211957883U CN202021079262.9U CN202021079262U CN211957883U CN 211957883 U CN211957883 U CN 211957883U CN 202021079262 U CN202021079262 U CN 202021079262U CN 211957883 U CN211957883 U CN 211957883U
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Abstract
The utility model relates to a dual polarization phased array antenna and dual polarization phased array weather radar. The dual-polarization phased-array antenna is characterized in that a plurality of dual-polarization rows are distributed on the transverse cylindrical supporting surface in a feeding mode to form a transverse cylindrical dual-polarization (polarization) microstrip patch antenna, so that two polarization (polarization) signals in the horizontal direction and the vertical direction can be transmitted and received simultaneously, and digital multi-beam signals with unchanged beam width, unchanged antenna gain and unchanged dual-polarization performance can be guaranteed. The utility model provides a dual polarization phased array weather radar adopts the horizontal columniform dual polarization (polarization) microstrip patch antenna of above-mentioned formation, can guarantee the uniformity that different scanning angle surveyed weather, improves the accuracy that the three-dimensional solid of weather target found. Meanwhile, the requirement of the conventional phased array weather radar on calibration can be simplified, and the adaptability of the dual-polarization phased array weather radar is improved.
Description
Technical Field
The utility model relates to a weather detection device field especially relates to a dual polarization phased array antenna and dual polarization phased array weather radar.
Background
Since the advent of radar technology, the use of radar for weather detection has been under development. The weather radar is the most effective means for detecting and early warning various dangerous weather. Weather radar networks are built in a plurality of countries in the world, and a new generation weather radar network is built in China. The weather radar used in the current service generally adopts mechanical scanning, the time of about 6 minutes is needed for completing one-time volume scanning, the detection of some weather phenomena with quick change is difficult to meet, the phased array weather radar adopts an electrical scanning mode, the scanning speed is not limited by mechanical rotation performance, and multiple beams can work simultaneously, so that the rapid detection realized by adopting the phased array weather radar becomes the mainstream of the next-generation weather radar development.
The dual-polarization detection technology can obtain more parameters of meteorological targets, can better identify the meteorological targets and provide more accurate meteorological information, and therefore the dual-polarization detection technology becomes a consensus in the field of meteorological radars. The phased array weather radar is combined with the dual-polarization technology to form the dual-polarization phased array weather radar capable of scanning rapidly, so that the defects of the existing weather radar are overcome, and multifunctional detection is realized.
Phased array antenna array configurations typically include one-dimensional linear arrays, two-dimensional planar arrays, and spherical arrays.
One-dimensional linear arrays are typically electrically swept in azimuth or elevation, and mechanically rotated in the other dimension to complete full airspace meteorological detection. The two-dimensional planar array antenna needs a plurality of area arrays (usually three or four surfaces), and the cost is high. The one-dimensional linear array and the two-dimensional planar array have the characteristic that when the beam pointing direction deviates from the normal, each parameter of the beam changes nonlinearly. Along with the change of the beam scanning angle, the beam width of a one-dimensional linear array or a two-dimensional planar array is changed, the antenna gain is changed, the radar irradiation volume is also changed, the polarization direction of the beam is also changed and distorted, and the change is nonlinear change. Spherical arrays are best in phased array radars, the beam is flexibly steerable, uniform in all beam directions, but the manufacturing cost is highest. In order to solve the problem of nonlinear change of parameters in planar phased array beam scanning, a U.S. patent "Cylindrical polar phased array radar" (patent number US 2011/0285582 a1) proposes a vertical Cylindrical phased array weather radar, which ensures that indexes of beams are stable and unchanged when the radar scans in azimuth, but the method still has nonlinear change of beams in pitch scanning, and has limited pitch scanning angle, so that the radar cannot scan to the zenith direction
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a dual polarization phased array antenna and dual polarization phased array weather radar to realize the unchangeable scanning of beam performance, effectively promote the degree of accuracy of weather detection and target identification.
In order to achieve the above object, the utility model provides a following scheme:
a dual polarization phased array antenna, comprising: the device comprises a transverse cylindrical supporting surface, a supporting frame and a plurality of dual-polarized row feeds;
the support frame is matched with the transverse cylindrical support surface; the supporting frame is used for supporting the transverse cylindrical supporting surface;
the dual-polarized row feeders are arranged on the transverse cylindrical supporting surface, and the dual-polarized row feeders are closely arranged along the circumferential direction of the transverse cylindrical supporting surface.
Preferably, the method further comprises the following steps: a digital transceiver module;
the digital transceiver module comprises a plurality of dual-channel digital T/R components;
each dual-polarized row feed corresponds to one dual-channel digital T/R component; the dual-channel digital T/R component is used for transmitting and receiving signals.
Preferably, the dual-channel digital T/R component comprises a digital receiving unit and a digital transmitting unit;
the digital transmitting unit is used for generating a frequency modulation signal or a phase coding signal required by a detection target; the digital receiving unit is used for receiving echo signals reflected by the target.
Preferably, the digital transmitting unit is an all-solid-state transmitter.
Preferably, each dual-polarized row feed comprises a plurality of row feed internal sub-arrays; each row feed inner subarray comprises an electronic switch and a plurality of antenna radiation units;
the electronic switch is connected with the antenna radiation unit; the electronic switch is used for switching on and off the antenna radiation unit.
Preferably, the method further comprises the following steps: a drive module;
the driving module is connected with the supporting frame and used for driving the supporting frame to horizontally rotate.
Preferably, the driving module includes: the device comprises a driving motor, an angle encoder and a motor control unit;
the angle encoder and the driving motor are both connected with the motor control unit;
the motor control unit is used for controlling the driving motor to drive the support frame to rotate to a specified angle according to the angle information in the angle encoder.
A dual polarization phased array weather radar, comprising: the dual-polarization phased array antenna comprises an information processing module and the dual-polarization phased array antenna;
the information processing module is connected with the dual-polarization phased array antenna; the information processing module is used for completing spectrum analysis according to the signals received by the dual-polarization phased array antenna to obtain target echo information; the information processing module is further used for generating a control instruction so as to drive the dual-polarization phased array antenna to perform signal acquisition in the horizontal direction and/or signal acquisition in the pitching direction.
Preferably, the information processing module is connected with an electronic switch in the dual-polarization phased array antenna; the information processing module is used for controlling the electronic switch to be switched on and switched off, and the dual-polarization phased array antenna forms electronic scanning at different angles in the pitching direction according to the area for switching on the electronic switch.
Preferably, the information processing module includes: the system comprises a multi-channel DBF module, a signal processing module and a communication module;
the multi-channel DBF module is connected with the signal processing module; the signal processing module is connected with the communication module;
the multi-channel DBF module is used for converting the echo signals received by the dual-polarization phased array antenna into beam signals; the signal processing module is used for carrying out spectrum analysis on the beam signal to obtain target echo information; the communication module is used for sending the target echo information.
According to the utility model provides a concrete embodiment, the utility model discloses a following technological effect:
the utility model provides a dual polarization phased array antenna lays a plurality of double polarization row feeders on horizontal cylindrical holding surface, forms horizontal columniform dual polarization (polarization) microstrip patch antenna, and then realizes transmitting and accepting simultaneously of two polarization (polarization) signals of horizontal direction and vertical direction to can guarantee that beam width is unchangeable, antenna gain is unchangeable, the unchangeable digital multi-beam signal of dual polarization performance.
The utility model provides a dual polarization phased array weather radar adopts the horizontal columniform dual polarization (polarization) microstrip patch antenna of above-mentioned formation, can guarantee the uniformity that different scanning angle surveyed weather, improves the accuracy that the three-dimensional solid of weather target found. Meanwhile, the requirement of the conventional phased array weather radar on calibration can be simplified, and the adaptability of the dual-polarization phased array weather radar is improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive labor.
Fig. 1 is a schematic structural diagram of a dual-polarization phased array antenna provided by the present invention;
fig. 2 is a schematic structural diagram of a dual-polarization phased array weather radar provided by the present invention;
fig. 3 is a structural diagram of the dual polarization phased array weather radar including the dual polarization phased array antenna provided by the present invention;
fig. 4 is a schematic diagram of radar beam transmission provided by the present invention;
fig. 5 is a directional diagram of a horizontal line feed azimuth beam of the dual-polarized line feed in the embodiment of the present invention;
fig. 6 is a directional diagram of a pitch transmit beam in an embodiment of the present invention;
fig. 7 is a directional diagram of a pitch receive beam in an embodiment of the present invention.
Description of the symbols:
the device comprises a 1-transverse cylindrical supporting surface, a 2-supporting frame, a 3-dual-polarized line feed, a 4-digital receiving and transmitting module, a 5-information processing module and a 6-box body.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
The utility model aims at providing a dual polarization phased array antenna and dual polarization phased array weather radar to realize the unchangeable scanning of beam performance, effectively promote the degree of accuracy of weather detection and target identification.
In order to make the above objects, features and advantages of the present invention more comprehensible, the present invention is described in detail with reference to the accompanying drawings and the detailed description.
Fig. 1 is the utility model provides a structural schematic diagram of dual polarization phased array antenna, fig. 3 is the utility model provides a dual polarization phased array weather radar's that includes dual polarization phased array antenna appearance structure chart. As shown in fig. 1 and 3, the present invention provides a dual polarization phased array antenna, including: a transverse cylindrical supporting surface 1, a supporting frame 2 and a plurality of dual-polarized row feeds 3.
The supporting frame 2 is matched with the transverse cylindrical supporting surface 1 (as shown in figure 3). The support frame 2 is used for supporting the transverse cylindrical support surface 1.
The plurality of dual-polarized row feeders 3 are arranged on the transverse cylindrical supporting surface 1, and the plurality of dual-polarized row feeders 3 are closely arranged along the circumferential direction of the transverse cylindrical supporting surface 1 (as shown in fig. 1).
As a further optimization of the embodiments provided by the present invention, the dual polarization phased array antenna further comprises a digital transceiver module 4.
The digital transceiver module 4 comprises a plurality of two-channel digital T/R components.
Each dual-polarized row feed corresponds to one dual-channel digital T/R component. The dual-channel digital T/R component is used for transmitting and receiving signals. Equivalently, the channels of the digital transceiver module 4 correspond to the dual-polarized row feeds 3 one by one, that is: each line feed is connected with one path of digital transceiver module 4, and the digital transceiver module 4 realizes the following functions:
1) during transmission, a Direct Digital Synthesis (DDS) is used to generate, up-convert, and amplify the transmission excitation signal, and the signal is sent to a transmission channel in the transceiver module by a line feed network to generate a high-power transmission signal.
2) During receiving, the received signals of the dual-polarized antenna are synthesized by the feed network, sent to the receiving channel of the digital receiving and sending module 4, amplified, filtered, down-converted and A/D sampled, then converted into digital received signals, and sent to the software information processing module 5 through the optical fiber.
3) The wave beam electronic scanning of the pitching arc phased array is realized by gating a pitching digital transceiving component channel mode.
4) The pitching receiving multi-Beam is realized by a Digital Beam former (DBF for short) in the software information processing module 5.
The dual-channel digital T/R component comprises a digital receiving unit and a digital transmitting unit. The digital transmitting unit is preferably an all-solid-state transmitter, but is not limited thereto. Digital receiving element is with digital transmitting element assorted signal reception part, and digital receiver that the field can realize digital signal reception all can regard as the utility model provides a digital receiving element, nevertheless the utility model discloses preferred adoption digit receives the paster.
The digital transmitting unit is used for generating a frequency modulation signal or a phase coding signal required by detecting the target. The digital receiving unit is used for receiving echo signals reflected by the target.
In the present invention, in order to realize the electronic scanning in the range of-2 ° - +182 ° in the pitch direction, in the embodiment provided by the present invention, each of the dual-polarized row feeds need to include a plurality of row feeds. Each row-fed inner sub-array comprises an electronic switch and a plurality of antenna radiation units. The adjacent antenna radiation units can be arranged according to a rectangle or a triangle.
The electronic switch is connected with the antenna radiation unit. The electronic switch is used for turning on and off the antenna radiation units so as to form electric scanning ranges of different angles in the pitching (vertical) direction by means of turning on different antenna radiation units.
In the horizontal direction, the present invention adopts mechanical scanning. In order to achieve a 360 deg. rotational scan in the horizontal direction. The utility model provides a dual polarization phased array antenna needs further including drive module.
The driving module is connected with the support frame 2 and used for driving the support frame 2 to rotate within a horizontal 360-degree range.
Wherein the drive module (servo transmission system in fig. 2) comprises: the device comprises a driving motor, an angle encoder and a motor control unit.
The angle encoder and the driving motor are connected with the motor control unit.
The motor control unit is used for controlling the driving motor to drive the support frame 2 to rotate to a specified angle or position according to the angle information in the angle encoder.
The utility model discloses above-mentioned realize 360 continuous scanning in the horizontal direction, realize in the every single move direction-2- +182 within range electric scanning's radar beam transmission path as shown in figure 4.
The utility model provides a horizontal cylindrical dual polarization phased array antenna adopts double polarization (polarization) microstrip paster (double polarization row to present 3) antenna, can realize the simultaneous transmission and the receipt of level, two perpendicular polarization (polarization) signals simultaneously. The dual-polarized row feeds 3 are arranged at equal intervals in the azimuth direction to form a horizontal linear array, and the feed network of the row feeds realizes Taylor amplitude weighting so as to ensure that the antenna side lobe in the azimuth direction is lower than-30 dB or lower (as shown in figure 5).
When the dual-polarization working is carried out, the transmitting waveforms of the horizontal polarization and the vertical polarization can be the same, and an orthogonal coding form can also be adopted, so that the isolation degree between two channels when the dual-polarization working is carried out is improved.
As another embodiment of the present invention, the present invention further provides a dual polarization phased array weather radar including the dual polarization phased array antenna, wherein the dual polarization phased array weather radar adopts a pulse compression doppler system. As shown in fig. 2, the dual polarization phased array weather radar further includes: and an information processing module 5.
The information processing module 5 is connected with the dual-polarization phased array antenna. And the information processing module 5 is used for completing spectrum analysis according to the signals received by the dual-polarization phased array antenna to obtain target echo information. The information processing module 5 is further configured to generate a control instruction to drive the dual-polarization phased array antenna to perform signal acquisition in the horizontal direction and/or signal acquisition in the pitch direction.
The information processing module 5 is connected with an electronic switch in the dual-polarization phased array antenna. The information processing module 5 is configured to control the electronic switch to be turned on or turned off, and the dual-polarization phased array antenna forms electronic scanning at different angles in the pitching direction according to a region where the electronic switch is turned on.
In addition, the information processing module 5 may further include a timing unit to generate a full-machine timing signal of the dual-polarization phased array weather radar and an excitation signal to be sent to a transmitting module in the dual-polarization phased array antenna.
Wherein, the information processing module 5 includes: the device comprises a multi-channel DBF module, a signal processing module and a communication module.
And the multi-channel DBF module is connected with the signal processing module. The signal processing module is connected with the communication module.
The multi-channel DBF module receives multiple paths of received signals (signals sent by multiple horizontal lines) sent by the digital transceiver module 4 in the dual-polarization phased-array antenna, forms single-beam or multi-beam signals, and sends the single-beam or multi-beam signals to the signal processing module. The signal processing module processes the single beam or multi-beam signals to complete the spectrum analysis. Because of spectral analysis belongs to prior art, the utility model discloses do not give unnecessary details here.
As an embodiment of the present invention, the utility model provides a box 6 can be set up to 2 shanghai of support frame of dual polarization phased array antenna, as shown in fig. 3, and above-mentioned information processing module 5 can be placed in this box 6 to avoid receiving external factors's interference.
Different fixed modes can be chooseed for use according to the difference of the position geographical condition that awaits measuring of the fixed of support frame 2 the utility model discloses well preferred mode that adopts fix with rivet fixes.
Furthermore, the utility model provides a dual polarization phased array weather radar is still including being used for providing the power distribution system of electric energy for whole radar. The power distribution system is preferably a solar power supply system or a commercial power supply system.
Below choose for use one-dimensional horizontal line to present as dual polarization line to present 3, include that the utility model provides a to the aforesaid the specific working process of dual polarization phased array antenna and dual polarization phased array weather radar explains.
The utility model discloses a dual polarization phased array antenna is horizontal cylindrical structure, and it is presented in every single move to arranging according to the cylinder cambered surface by 258 one-dimensional double polarization horizontal line array row. Every two adjacent 112 line feeds form an effective irradiation aperture, pitching wave beam scanning of less than or equal to 1 degree can be realized, and the scanning range of the whole antenna is-2-182 degrees.
Firstly, the signal processing module receives an external instruction or sets working parameters according to built-in parameters of the radar, generates timing signals required by the whole machine to work according to the received external instruction or sets the working parameters according to the built-in parameters, and controls the radar to enter a working mode.
Under the action of a modulation pulse (excitation signal) generated by the signal processing module, the signal transmitting unit transmits a frequency modulation signal or a phase coding signal required by a radar detection target, and after the frequency modulation signal or the phase coding signal is up-converted to a radar working wave band in the signal transmitting unit, power amplification is carried out, and then the signal is radiated by a dual-polarization phased array antenna. The transmitted excitation signal is in the form of electromagnetic wave, the electromagnetic wave generates backscattering after encountering a target to form an echo signal, a digital receiving unit in the dual-polarization phased array antenna receives the returned echo signal, and the returned echo signal is transmitted to a multi-channel DBF module after being subjected to low-noise amplification, filter, down-conversion to digital intermediate frequency and AD sampling by a digital receiving and transmitting module 4. And forming a receiving beam signal in the DBF module, and performing spectrum analysis through the signal processing module to obtain target echo information. Finally, the echo information is transmitted to a designated place (which can be a remote terminal) by the communication module.
The utility model provides a weather radar adopts the pulse compression system to compromise distance resolution and range at the in-process of work, and excitation signal's wave form is chirp, non-chirp and phase coding pulse mode, and its bandwidth is 5MHz, and distance resolution reaches 30m, and pulse width is adjustable at 0.5 mus ~ 200 mus within range. After the pulse compression, the distance side lobe can be reduced by carrying out a frequency domain weighting method in the process of carrying out signal processing by the signal processing module.
Adopt the utility model provides a when dual polarization phased array antenna carries out signal transmission, in order to guarantee the maximum radiation electromagnetic wave as far as, do not adopt the reduction by-pass lobe of amplitude and phase weighting, as shown in figure 6. In receiving, in order to achieve the maximum side lobe level less than or equal to-30 dB or lower, the side lobe needs to be reduced by using amplitude-phase weighting, as shown in fig. 7.
Compare with current plane phased array weather radar, the utility model provides a dual polarization phased array weather radar that includes horizontal columniform dual polarization phased array antenna has following advantage:
1. by adopting the bipolar line feed, the beam scanning performance of the phased array weather radar can be improved, digital multi-beams with unchanged beam width, unchanged antenna gain and unchanged dual polarization performance are realized, the weather detection consistency at different scanning angles is ensured, and the construction precision of a weather target three-dimensional body is improved.
2. The electric scanning capability of-2-182 degrees can be realized by controlling the opening and closing area of the bipolar line feed, the full airspace detection time of the phased array weather radar is further shortened, and the particle phase state identification and weather characteristic identification capabilities of the phased array weather radar are improved.
3. The adoption of the transverse cylindrical dual-polarization phased array antenna simplifies the requirement of the phased array weather radar on calibration, improves the usability and adaptability of the radar, and facilitates the extension and the upgrade of the radar and the application range.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.
The principle and the implementation of the present invention are explained herein by using specific examples, and the above description of the embodiments is only used to help understand the method and the core idea of the present invention; meanwhile, for the general technical personnel in the field, according to the idea of the present invention, there are changes in the concrete implementation and the application scope. In summary, the content of the present specification should not be construed as a limitation of the present invention.
Claims (10)
1. A dual polarization phased array antenna, comprising: the device comprises a transverse cylindrical supporting surface, a supporting frame and a plurality of dual-polarized row feeds;
the support frame is matched with the transverse cylindrical support surface; the supporting frame is used for supporting the transverse cylindrical supporting surface;
the dual-polarized row feeders are arranged on the transverse cylindrical supporting surface, and the dual-polarized row feeders are closely arranged along the circumferential direction of the transverse cylindrical supporting surface.
2. The dual polarization phased array antenna of claim 1, further comprising: a digital transceiver module;
the digital transceiver module comprises a plurality of dual-channel digital T/R components;
each dual-polarized row feed corresponds to one dual-channel digital T/R component; the dual-channel digital T/R component is used for transmitting and receiving signals.
3. The dual polarization phased array antenna of claim 2, wherein the dual channel digital T/R assembly comprises a digital receiving unit and a digital transmitting unit;
the digital transmitting unit is used for generating a frequency modulation signal or a phase coding signal required by a detection target; the digital receiving unit is used for receiving echo signals reflected by the target.
4. The dual polarization phased array antenna of claim 3, wherein the digital transmission unit is an all solid state transmitter.
5. The dual polarization phased array antenna of claim 1, wherein each of said dual polarization row feeds comprises a plurality of row feed internal sub-arrays; each row feed inner subarray comprises an electronic switch and a plurality of antenna radiation units;
the electronic switch is connected with the antenna radiation unit; the electronic switch is used for switching on and off the antenna radiation unit.
6. The dual polarization phased array antenna of claim 1, further comprising: a drive module;
the driving module is connected with the supporting frame and used for driving the supporting frame to horizontally rotate.
7. The dual polarization phased array antenna of claim 6, wherein the driving module comprises: the device comprises a driving motor, an angle encoder and a motor control unit;
the angle encoder and the driving motor are both connected with the motor control unit;
the motor control unit is used for controlling the driving motor to drive the support frame to rotate to a specified angle according to the angle information in the angle encoder.
8. A dual polarization phased array weather radar, comprising: an information processing module and a dual polarization phased array antenna as claimed in any one of claims 1 to 7;
the information processing module is connected with the dual-polarization phased array antenna; the information processing module is used for completing spectrum analysis according to the signals received by the dual-polarization phased array antenna to obtain target echo information; the information processing module is further used for generating a control instruction so as to drive the dual-polarization phased array antenna to perform signal acquisition in the horizontal direction and/or signal acquisition in the pitching direction.
9. The dual polarization phased array weather radar of claim 8, wherein the information processing module is coupled to an electronic switch in the dual polarization phased array antenna; the information processing module is used for controlling the electronic switch to be switched on and switched off, and the dual-polarization phased array antenna forms electronic scanning at different angles in the pitching direction according to the area for switching on the electronic switch.
10. The dual polarization phased array weather radar of claim 8, wherein the information processing module comprises: the system comprises a multi-channel DBF module, a signal processing module and a communication module;
the multi-channel DBF module is connected with the signal processing module; the signal processing module is connected with the communication module;
the multi-channel DBF module is used for converting the echo signals received by the dual-polarization phased array antenna into beam signals; the signal processing module is used for carrying out spectrum analysis on the beam signal to obtain target echo information; the communication module is used for sending the target echo information.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114779193A (en) * | 2022-06-17 | 2022-07-22 | 成都信息工程大学 | Phased array weather radar echo signal simulation method and device |
| JP2022174706A (en) * | 2021-05-11 | 2022-11-24 | 中国气象局气象探測中心 | Spherical dual-polarization phased array weather radar |
| CN116706567A (en) * | 2023-08-01 | 2023-09-05 | 中国人民解放军国防科技大学 | Polarization coding array antenna |
-
2020
- 2020-06-12 CN CN202021079262.9U patent/CN211957883U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2022174706A (en) * | 2021-05-11 | 2022-11-24 | 中国气象局气象探測中心 | Spherical dual-polarization phased array weather radar |
| CN114779193A (en) * | 2022-06-17 | 2022-07-22 | 成都信息工程大学 | Phased array weather radar echo signal simulation method and device |
| CN116706567A (en) * | 2023-08-01 | 2023-09-05 | 中国人民解放军国防科技大学 | Polarization coding array antenna |
| CN116706567B (en) * | 2023-08-01 | 2023-10-31 | 中国人民解放军国防科技大学 | Polarization coding array antenna |
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