Cavity-backed slot dual-band circularly polarized antenna based on substrate integrated waveguide

A substrate-integrated waveguide and circularly polarized antenna technology, applied in the field of antennas, can solve the problems of low front-to-back ratio, excessive volume, high gain, etc., and achieve the effects of easy integration and simple processing

Active Publication Date: 2017-05-10
SOUTHEAST UNIV
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  • Summary
  • Abstract
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Problems solved by technology

The traditional cavity-backed antenna has the advantages of high gain and low front-to-back ratio, but it also has the disadvantages of being too large and not easy to integrate with planar circuits.

Method used

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  • Cavity-backed slot dual-band circularly polarized antenna based on substrate integrated waveguide
  • Cavity-backed slot dual-band circularly polarized antenna based on substrate integrated waveguide
  • Cavity-backed slot dual-band circularly polarized antenna based on substrate integrated waveguide

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Embodiment Construction

[0035] Below in conjunction with specific embodiment, further illustrate the present invention, should be understood that these embodiments are only used to illustrate the present invention and are not intended to limit the scope of the present invention, after having read the present invention, those skilled in the art will understand various equivalent forms of the present invention All modifications fall within the scope defined by the appended claims of the present application.

[0036] The circular polarization cavity-backed slot antenna of the invention is composed of a substrate integrated waveguide back cavity and a slot radiation unit. The antenna is processed by a single-layer printed circuit board (PCB) process, including a dielectric layer, an antenna body composed of upper and lower metal layers, and the antenna body includes a GCPW-SIW transfer structure between the GCPW and SIW for testing, A two-stage matching line composed of SIW transmission line and inductiv...

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Abstract

The invention discloses a cavity-backed slot dual-band circularly polarized antenna based on a substrate integrated waveguide, which comprises an adapter structure for testing between a grounded coplanar waveguide (GCPW) and an SIW (Substrate Integrated Waveguide), a two-order matching circuit formed by an SIW transmission line and an inductive window, an approximately circular back cavity formed by the SIW and two index gradually-changing slot radiation units at the obverse side of the circular back cavity. The antenna designed by adopting the method disclosed by the invention can realize circularly polarized radiation at two frequency points.

Description

technical field [0001] The invention relates to a dual-frequency circularly polarized cavity-backed slot antenna with wide application prospects and adopting SIW (Substrate Integrated Waveguide, substrate integrated waveguide) technology, which belongs to the technical field of antennas. Background technique [0002] Antennas are an important part of wireless communication systems. With the rapid development of wireless communication, there is an urgent need for antennas with small size, low cost, high gain and easy integration. Traditional cavity-backed antennas have the advantages of high gain and low front-to-back ratio, but they also have disadvantages such as large size and difficulty in integrating with planar circuits. [0003] The circularly polarized antenna can receive any polarized electromagnetic wave from any antenna, which can effectively improve the receiving and radiation efficiency, so it is widely used in actual jamming and electronic reconnaissance. Circ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01Q13/18H01Q1/50H01Q5/50H01Q5/10
CPCH01Q1/50H01Q5/10H01Q5/50H01Q13/18
Inventor 王海明无奇尹杰茜余晨洪伟
Owner SOUTHEAST UNIV
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