Dual-polarized cylindrical spherical surface phased array antenna
By adopting dual-polarization design and dual-channel frequency conversion analog technology in column spherical phased array antennas, the digital analog conversion channel is shared, which solves the problem of difficulty in reducing complexity and cost when the number of antenna elements and polarization methods increase in the existing technology, and achieves a higher-efficiency antenna design with lower complexity and cost.
Patent Information
- Application Number
- CN202411688215.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-25
- Publication Date
- 2025-03-04
AI Technical Summary
When the existing column spherical phased array antenna increases the number of antenna array elements and polarization methods, the complexity and production costs of the entire machine are difficult to effectively reduce.
A dual-polarized column spherical phased array antenna design is adopted, where different polarizations of the same antenna array element share the same digital analog conversion channel, and the full airspace coverage is achieved through the combination of the dual-channel frequency conversion module and the spherical cylinder structure.
Reducing the number of digital analog conversion channels by half reduces the complexity and production costs of the entire machine, while expanding the application range of antenna beams.
Smart Images
Figure CN119560800A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the technical field of phased array antennas, and in particular to a dual-polarized cylindrical spherical phased array antenna. Background Art
[0002] The cylindrical spherical phased array antenna can achieve full-range scanning coverage in the airspace, which has an incomparable advantage in the phased array antenna system compared to the 120° airspace scanning coverage of the planar phased array antenna. It can be used in fixed, vehicle-mounted, airborne, and ship-mounted communication systems.
[0003] For each polarization channel of each antenna element of the cylindrical spherical phased array antenna, one frequency conversion channel and one digital-to-analog conversion channel are required. The design complexity and production cost of the digital-to-analog conversion channel account for 50% of the complexity and production cost of the spherical phased array antenna. With the increase of communication distance, it is necessary to increase the antenna gain. The gain and aperture size of the cylindrical spherical phased array antenna are closely related. In order to improve the antenna radiation gain, the spherical antenna needs to have a corresponding radiation aperture and increase the corresponding antenna elements. In order to further increase the communication capacity, the antenna also needs to support a variety of different polarization modes. As the number of antenna elements increases and the number of antenna polarization modes increases, the frequency conversion channels and digital-to-analog conversion channels will increase in proportion, and the complexity and production cost of the whole machine will also increase in proportion. How to effectively reduce the complexity and production cost of the whole machine while increasing the number of antenna elements and the number of antenna polarization modes is a key technology that needs to be solved urgently. Summary of the invention
[0004] The object of the present invention is to provide a dual-polarization cylindrical spherical phased array antenna to solve the above technical problems.
[0005] To achieve the above purpose, the present invention adopts the following technical solutions: A dual-polarized cylindrical spherical phased array antenna comprises an antenna cover, a cylindrical spherical active antenna array surface, a digital-to-analog conversion module and a heat dissipation structure, wherein the antenna cover covers the cylindrical spherical active antenna array surface, the cylindrical spherical active antenna array surface is mounted on the heat dissipation structure, the digital-to-analog conversion module is mounted inside the cylindrical spherical active antenna array surface, a local oscillator unit is integrated inside the digital-to-analog conversion module, and the local oscillator unit outputs two local oscillator signals of different frequencies.
[0006] Preferably: the cylindrical spherical active antenna array is composed of an antenna unit, a dual-channel frequency conversion module and an array support structure, the antenna unit is installed on the dual-channel frequency conversion module, the dual-channel frequency conversion module is installed on the array support structure, the dual-channel frequency conversion module includes two frequency conversion channels, the two frequency conversion channels correspond to two orthogonal polarizations of the antenna respectively, the two frequency conversion channels have different intermediate frequencies, the intermediate frequencies of the two frequency conversion channels are synthesized into one, corresponding to one digital-to-analog conversion channel in the digital-to-analog conversion module.
[0007] Preferably: the array support structure is a spherical cylindrical structure, the first layer of the array support structure is installed with 4 antenna units and a dual-channel frequency conversion module, the second layer of the array support structure is installed with 8 antenna units and a dual-channel frequency conversion module, the third layer of the array support structure is installed with 9 antenna units and a dual-channel frequency conversion module, and the fourth layer of the array support structure is installed with 9 antenna units and a dual-channel frequency conversion module. The entire cylindrical spherical active antenna array can achieve full airspace pitch -45°~+90° and azimuth 0~360° coverage.
[0008] Preferably: a multi-band transceiver antenna is installed on the top of the array support structure.
[0009] Preferably: two differential positioning antenna arms are installed on both sides of the heat dissipation structure, differential positioning antennas are installed on the differential positioning antenna arms, and a radio frequency cable is connected between the differential positioning antenna and the heat dissipation structure.
[0010] Compared with the prior art, the present invention has the following advantages: different polarizations of the same antenna array element share the same digital-to-analog conversion channel, which reduces the number of digital-to-analog conversion channels by half, and reduces the complexity and production cost of the whole machine. The present invention can reduce the number of digital-to-analog conversion channels of the dual-polarized cylindrical spherical phased array antenna by half, and has the advantages of wide application range of antenna beams, low complexity, and low production cost. BRIEF DESCRIPTION OF THE DRAWINGS
[0011] Figure 1 It is a schematic diagram of the assembly structure of the present invention.
[0012] Figure 2 This is a schematic diagram of the installation of the antenna unit and dual-channel frequency conversion module.
[0013] Figure 3 It is a schematic diagram of the active antenna array of the present invention.
[0014] Figure 4 Schematic diagram of the principle of the present invention.
[0015] In the figure: 1-antenna unit; 2-dual-channel frequency conversion module; 3-multi-band transceiver antenna; 4-first layer of array support structure; 5-second layer of array support structure; 6-third layer of array support structure; 7-fourth layer of array support structure; 8-radome; 9-cylindrical spherical active array; 10-digital-analog conversion module; 11-heat dissipation structure. DETAILED DESCRIPTION
[0016] The present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.
[0017] A dual-polarized cylindrical spherical phased array antenna comprises an antenna cover 8, a cylindrical spherical active antenna array surface 9, a digital-to-analog conversion module 10 and a heat dissipation structure 11, wherein the antenna cover 8 covers the cylindrical spherical active antenna array surface 9, the cylindrical spherical active antenna array surface 9 is mounted on the heat dissipation structure 11, the digital-to-analog conversion module 10 is mounted inside the cylindrical spherical active antenna array surface 9, a local oscillator unit is integrated inside the digital-to-analog conversion module 10, and the local oscillator unit outputs two local oscillator signals of different frequencies.
[0018] The cylindrical spherical active antenna array 9 is composed of an antenna unit 1, a dual-channel frequency conversion module 2 and an array support structure. The antenna unit 1 is installed on the dual-channel frequency conversion module 2, and the dual-channel frequency conversion module 2 is installed on the array support structure. The dual-channel frequency conversion module 2 includes two frequency conversion channels, and the two frequency conversion channels correspond to two orthogonal polarizations of the antenna respectively. The intermediate frequencies of the two frequency conversion channels are different. The intermediate frequencies of the two frequency conversion channels are synthesized into one, corresponding to one digital-to-analog conversion channel in the digital-to-analog conversion module.
[0019] The array support structure is a spherical cylindrical structure. Four antenna units 1 and a dual-channel frequency conversion module 2 are installed on the first layer 4 of the array support structure, eight antenna units 1 and a dual-channel frequency conversion module 2 are installed on the second layer 5 of the array support structure, nine antenna units 1 and a dual-channel frequency conversion module 2 are installed on the third layer 6 of the array support structure, and nine antenna units 1 and a dual-channel frequency conversion module 2 are installed on the fourth layer 7 of the array support structure. The entire cylindrical spherical active antenna array can achieve full airspace pitch -45°~+90° and azimuth 0~360° coverage.
[0020] A multi-band transceiver antenna 3 is installed on the top of the array support structure. Two differential positioning antenna arms are installed on both sides of the heat dissipation structure 11, and differential positioning antennas are installed on the differential positioning antenna arms. The differential positioning antenna and the heat dissipation structure 11 are connected by a radio frequency cable. The above is a preferred embodiment of the present invention. For ordinary technicians in this field, according to the teachings of the present invention, without departing from the principles and spirit of the present invention, changes, modifications, substitutions and variations made to the implementation methods are still within the scope of protection of the present invention.
Claims
1. A dual-polarized cylindrical spherical phased array antenna, characterized in that: It includes an antenna cover, a cylindrical spherical active antenna array, a digital-to-analog conversion module and a heat dissipation structure. The antenna cover covers the cylindrical spherical active antenna array, the cylindrical spherical active antenna array is installed on the heat dissipation structure, the digital-to-analog conversion module is installed inside the cylindrical spherical active antenna array, a local oscillator unit is integrated inside the digital-to-analog conversion module, and the local oscillator unit outputs two local oscillator signals of different frequencies.
2. The dual-polarized cylindrical spherical phased array antenna according to claim 1, characterized in that: The cylindrical spherical active antenna array is composed of an antenna unit, a dual-channel frequency conversion module and an array support structure. The antenna unit is installed on the dual-channel frequency conversion module, and the dual-channel frequency conversion module is installed on the array support structure. The dual-channel frequency conversion module includes two frequency conversion channels, and the two frequency conversion channels correspond to two orthogonal polarizations of the antenna respectively. The two frequency conversion channels have different intermediate frequencies. The intermediate frequencies of the two frequency conversion channels are synthesized into one, corresponding to one digital-to-analog conversion channel in the digital-to-analog conversion module.
3. The dual-polarized cylindrical spherical phased array antenna according to claim 2, characterized in that: The array support structure is a spherical cylindrical structure. The first layer of the array support structure is installed with 4 antenna units and dual-channel frequency conversion modules, the second layer of the array support structure is installed with 8 antenna units and dual-channel frequency conversion modules, the third layer of the array support structure is installed with 9 antenna units and dual-channel frequency conversion modules, and the fourth layer of the array support structure is installed with 9 antenna units and dual-channel frequency conversion modules. The entire cylindrical active antenna array can achieve full airspace pitch -45°~+90° and azimuth 0~360° coverage.
4. The dual-polarized cylindrical spherical phased array antenna according to claim 3, characterized in that: A multi-band transceiver antenna is installed on top of the array support structure.
5. The dual-polarized cylindrical spherical phased array antenna according to claim 1, characterized in that: Two differential positioning antenna arms are installed on both sides of the heat dissipation structure, and differential positioning antennas are installed on the differential positioning antenna arms. The differential positioning antennas and the heat dissipation structure are connected by a radio frequency cable.