High-isolation dual-polarization circular-seam microstrip antenna unit

A high isolation, microstrip antenna technology, applied in the direction of antenna, antenna coupling, antenna grounding switch structure connection, etc., can solve the problems of large cross-polarized radiation, easy generation of high-order mode, consumption of radiated power, etc., and achieve fixed improvement. , the effect of reducing the profile height and extending the antenna bandwidth

Inactive Publication Date: 2017-07-07
10TH RES INST OF CETC
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Problems solved by technology

This feeding method can complete the matching work well as long as the depth of the microstrip line embedded in the patch is properly adjusted when performing impedance matching, but this method will excite the surface wave effect and consume radiation as the thickness of the substrate increases. Power, reduce antenna efficiency, its impedance bandwidth is generally only about 2% -5%
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  • High-isolation dual-polarization circular-seam microstrip antenna unit
  • High-isolation dual-polarization circular-seam microstrip antenna unit

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Embodiment Construction

[0014] refer to figure 1 , figure 2 . In the embodiment described below, a high-isolation double-polarized annular slot microstrip antenna unit includes a radiation patch 6 and a metal plate 1 etched on the top of the microstrip dielectric plate 5, and is characterized in that the metal A box body with a metal enclosure 2 is provided between the board 1 and the microstrip dielectric board 5, and the middle part of the box body cavity is provided with a metal screw 7 to fix the radiation patch 6 and a short-circuit stud 3 to improve the isolation of the antenna port , the radiation patch 6 is formed with two spaced parallel feeding holes 8 of symmetrical short-circuit studs 3, and an annular seam 9 concentric with the feeding hole 8 is formed on the outer ring of the feeding hole 8, and the annular seam 9 is in the radiation patch A linearly polarized feed is simultaneously formed on the ±45° diagonal of the sheet 6 to capacitively load the antenna. The short-circuit stud 3...

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Abstract

The invention provides a high-isolation dual-polarization circular-seam microstrip antenna unit, and the antenna unit can be used to increase the port isolation of an antenna substantially. A box body with a metal enclosure frame (2) is arranged between a metal plate (1) and a microstrip dielectric plate (5), the middle of a cavity of the box body is provided with a short-circuit stud (3) which is fixed to a radiation patch (6) via a metal screw (7) and improves the port isolation of the antenna, two feed holes (8) separate from each other, parallel with each other and symmetrical with each other by taking the short-circuit stud (3) as the center are prepared in the radiation patch (6), circular seams (9) which are concentric with the feed holes are formed in the outer rings of the feed holes respectively, the circular seams for linearly polarized feed in the diagonals of +/-45 degree simultaneously, and capacitive loading is carried out on the antenna. According to the invention, the port isolation of the antenna is improved, the antenna unit is characterized by high isolation, and the problem that a traditional patch antenna is low in bandwidth and port isolation is solved.

Description

technical field [0001] The invention relates to a low-profile high-isolation dual-polarized annular slot microstrip antenna mainly used in mobile communication system base stations. Background technique [0002] Antennas are an integral part of contemporary wireless communication systems. With the rapid development of modern wireless communication technology, global positioning system (GPS), satellite communication, synthetic aperture radar (SAR), wireless personal communication (WLAN) and other fields require light-weight, low-profile, and easy-to-conform dual-polarization antenna. The microstrip antenna has the advantages of diverse feeding modes and polarization forms, and is easy to integrate with the feeding network and active circuit. With the continuous development of PCB technology, the requirements for system integration are getting higher and higher. Microstrip antennas are widely used in various wireless communication devices due to their advantages of low cost,...

Claims

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Application Information

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IPC IPC(8): H01Q1/36H01Q1/38H01Q1/50H01Q1/52H01Q15/24H01Q19/02
Inventor 胡大成何凌云王军会何海丹张云任燕飞
Owner 10TH RES INST OF CETC
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