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High efficiency broadband dual polarization cavity array antenna

An array antenna, dual-polarization technology, applied to antenna unit combinations with different polarization directions, antennas, antennas suitable for movable objects, etc. The effect of the need for polarized diversity

Inactive Publication Date: 2019-08-02
UNIV OF SCI & TECH OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the sandwich structure in its feed structure brings difficulties for antenna assembly
In addition, the blind hole design in its feed structure also greatly increases the processing cost

Method used

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  • High efficiency broadband dual polarization cavity array antenna
  • High efficiency broadband dual polarization cavity array antenna
  • High efficiency broadband dual polarization cavity array antenna

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specific Embodiment approach

[0023] The preferred embodiment of the high-efficiency broadband dual-polarization cavity array antenna of the present invention is:

[0024] include:

[0025] Rectangular opening waveguide antenna is used as the array unit form, fed by strip line, and double-polarized feed is realized by the laminated structure of multi-layer PCB substrate, at the same time, the unit structure is formed by using the strip line to form a sub-feed network Expand to 16×4 antenna array;

[0026] Carrying out weighting processing based on the Chebyshev principle on the power distribution feed network to suppress the antenna side lobe level;

[0027] The antenna array is fed by SMA connectors to improve the portability of the antenna, and the conversion from stripline to coaxial line is designed at the end of the feeding network, and when the stripline is buried in the multilayer PCB In the substrate, the broadband conversion structure from the stripline to the coaxial line is still designed, and...

specific Embodiment

[0066] By weighing the requirements of miniaturization and high gain, we designed a 16*4 antenna array. In order to meet the requirements of the antenna array for low sidelobe, Chebyshev weighting is performed on the entire antenna feed line. Since the 1dB gain bandwidth of the antenna is relatively wide, the series feed grid should not be used here, but the parallel feed network should be used. The overall structure of the antenna is as Figure 2-8 shown. The antenna has 7 layers of dielectric boards, and the dielectric boards are bonded with PP sheet FR-28. The schematic diagram of the layered structure is as follows: Figure 7 shown. The electromagnetic full-wave simulation software HFSS is used to simulate and optimize the antenna structure, which is mainly marked as VSWR and sidelobe level. The reason why the antenna gain is not optimized is that the antenna gain is almost entirely determined by the sidelobe balance and VSWR when the feed loss and antenna aperture are...

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Abstract

The invention discloses a high efficiency broadband dual polarization cavity array antenna. A rectangular open waveguide antenna is used as an array unit form, feed is performed through a strip wire,dual polarization feed is realized by a laminated structure of a multilayer PCB substrate, moreover, the strip wire is utilized to form a power divider feed network to expand a cell structure to a 16*4 antenna array, weighted processing based on the Chebyshev principle is performed on the power divide feed network to suppress the antenna sidelobe level, the antenna array is fed by an SMA connectorto improve portability of the antenna, and conversion from the strip wire to a coaxial wire is designed at a tail end of the feed network. The antenna is advantaged in that needs of a microwave system for polarization diversity are met, and electromagnetic performance superior to conventional antennas can still be obtained under limited physical conditions.

Description

technical field [0001] The invention relates to a dual-polarization cavity array antenna based on an aperture waveguide cavity, in particular to a high-efficiency broadband dual-polarization cavity array antenna. Background technique [0002] Dual-polarized antenna arrays are widely used in various microwave systems, such as SAR imaging systems and massive MIMO communications or radar systems, to meet the growing demand for polarization diversity. The microstrip antenna array is one of the most common dual-polarized array antennas, because it has the advantages of flexible design method and simple manufacturing process, but the main defect of the microstrip antenna array is that they have a large loss, especially when the array When the scale becomes larger, the loss of the microstrip array antenna is often large, which means that it is difficult to achieve an array antenna with high gain and high radiation efficiency based on this traditional design. In order to further en...

Claims

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Application Information

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IPC IPC(8): H01Q23/00H01Q21/00H01Q21/24H01Q19/10H01Q1/36H01Q1/48H01Q1/50H01Q1/28H01Q1/52
CPCH01Q1/285H01Q1/288H01Q1/36H01Q1/48H01Q1/50H01Q1/521H01Q19/10H01Q21/0075H01Q21/24H01Q23/00
Inventor 陈卫东陈畅姜山张倾远
Owner UNIV OF SCI & TECH OF CHINA
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