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Single-layer dual-circular polarization cavity backed traveling wave antenna with filtering function

A technology of dual circular polarization and traveling wave antenna, which is applied in the field of miniaturized wireless transceiver radio frequency front-end antenna and dual circular polarization cavity-backed traveling wave antenna, which can solve the problem of too narrow working bandwidth, complex structure, and wide production cost constraints. Application and other issues, to achieve the effect of frequency reuse, low production cost, and simple structure

Active Publication Date: 2020-09-18
HANGZHOU DIANZI UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

One is the complex structure
Most of the published cavity filter antennas are multi-cavity and multi-layer structures, and their high profile, large size and high manufacturing cost limit their wide application.
The second is the narrow working bandwidth. As far as the author knows, the bandwidth of the published cavity-backed circularly polarized filter antenna unit does not exceed 5%

Method used

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  • Single-layer dual-circular polarization cavity backed traveling wave antenna with filtering function
  • Single-layer dual-circular polarization cavity backed traveling wave antenna with filtering function
  • Single-layer dual-circular polarization cavity backed traveling wave antenna with filtering function

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Embodiment Construction

[0050] The present invention is further analyzed below in conjunction with specific examples.

[0051] combine figure 1 and figure 2 , a single-layer dual circularly polarized cavity-backed traveling wave antenna with filtering function, including a layer of Rogers5880 dielectric substrate S with a thickness of 1.575mm and an upper metal surface M1 and a lower metal surface M2 with the same size as the dielectric substrate.

[0052] The upper metal surface M1 covers the upper surface of the dielectric substrate S. A hollow rectangular area is opened in the center of the upper metal surface M1, and a cut square metal patch P2 with a side length of 8.1 mm is arranged in the hollow rectangular area. There is an annular gap P1 between the trimmed metal patch P2 and the upper metal surface M1, and the gap between the gaps is 1.8mm.

[0053] The edge-cut square metal patch P2 is a square structure with a notch on both opposite sides; the notch is a square structure with a side l...

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Abstract

The invention relates to a single-layer dual-circular polarization cavity backed traveling wave antenna with a filtering function. Most of back cavity filtering antennas are of a multi-cavity structure; although good filtering characteristics can be achieved, the defects of high profile, large size, high cost and the like of the back cavity filtering antennas limit the application of the filteringantennas. According to the invention, the integrated design of the antenna and the filter is carried out in the single-layer single substrate integrated waveguide cavity, and the functions of a band-pass filter and a circularly polarized radiator are realized at the same time. In addition, different ports of the filtering antenna are fed respectively, and the other port is connected with a load to realize left-handed circular polarization radiation and right-handed circular polarization radiation respectively. The filtering antenna has good filtering characteristics, wide bandwidth and high gain, and is simple in structure and easy to process and manufacture.

Description

technical field [0001] The invention belongs to the technical field of antennas for wireless communication terminals, and relates to a dual circularly polarized cavity-backed traveling-wave antenna with a filtering function, which can be used as an antenna for a radio frequency front end of a miniaturized wireless transceiver, and is widely used in mobile communications, satellite communications and radars and other wireless communication systems. Background technique [0002] Low-profile, high-gain broadband circularly polarized antennas are in great demand in modern communication systems due to their light weight, small size, and ability to resist multipath interference. In order to realize such a circularly polarized antenna, researchers have done a lot of work in recent decades. Slot antennas and microstrip antennas have become the first choice for researchers to design planar circularly polarized antennas because of their planar structure, simple structure, and easy in...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01Q1/38H01Q1/50H01Q5/307H01Q5/50H01Q13/10H01Q15/24H01P3/18H01P3/12H01P1/207
CPCH01Q1/38H01Q1/50H01Q5/307H01Q5/50H01Q13/106H01Q15/24H01P3/18H01P3/121H01P1/207
Inventor 罗国清王文磊金华燕张晓红代喜望
Owner HANGZHOU DIANZI UNIV
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