Base-plate integration waveguide harmonic oscillation type gap array circular-polarization antenna

Abstract

A substrate-integrated waveguide resonant slit array circular polarization antenna relates to a circular polarization antenna used in wireless communication fields such as satellite communication, electronic reconnaissance and countermeasure and radar. The circular polarization antenna comprises a microstrip adapter (2) below the front surface of the antenna, and a directional coupler (3) with an input terminal (31) and an isolation terminal (34) connected with the upper portion of the microstrip adapter (2), wherein the input terminal and the isolation terminal (34) are connected with a straight through terminal (32) and a coupling terminal (33) through a middle coupling segment (35); the middle coupling segment (35) is used for adjusting the power distribution of the straight through terminal (32) and the coupling terminal (33); the upper portions of the straight through terminal (32) and the coupling terminal are respectively connected with two left and right symmetrical power dividers (4) with unequal crossed phases; the eight branches of the power dividers (4) are connected with eight radiation waveguides (5); and a first slit array (61) and a second slit array (62) symmetrical to each other and with orthogonal radiation fields are etched in the top metal layer of each branch waveguide at the top eight radiation waveguides.

Description

technical field [0001] The invention relates to a circularly polarized antenna applicable to wireless communication fields such as satellite communication, electronic reconnaissance and countermeasures, and radar. Processed by PCB technology. Background technique [0002] The traditional metal rectangular waveguide has the advantages of high quality factor and high power capacity. Microwave and millimeter wave devices based on traditional waveguides have quite good performance, so they are widely used in various fields of wireless communication. The slot antenna based on metal rectangular waveguide has the advantages of large radiation power, high gain, low cross-polarization level, and easy control of lobe pattern. However, its bulky size, high cost, and complicated processing technology limit its application in modern communication systems, especially difficult to integrate with modern planar circuits. Therefore, a variety of transmission line technologies suitable for ...

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Problems solved by technology

At the same time, there are also problems such as small power capacity, large loss, open structure and inconvenient sealing, etc.

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