Differentially fed dual-polarized antenna with wideband harmonic suppression

Abstract

The invention discloses a differentially fed dual-polarized antenna with wideband harmonic suppression. The antenna includes an antenna reflection plate at the bottom and an antenna radiator dielectric plate at the top. The antenna radiator dielectric plate is composed of a top circuit and a bottom circuit. The bottom circuit includes a central square patch and eight open resonant slots that are etched at the four right-angle corners of the central square patch. The top circuit includes eight stepped feeder lines that are configured to excite the eight open resonant slots respectively. A short-circuited branch microstrip line is etched between every two adjacent stepped feeder lines. The tail end of each short-circuited branch microstrip line is provided with a short-circuit point that isshort-circuited with the square patch. In the antenna disclosed in the present invention, the eight open resonant slots are etched at the four right-angle corners of the central square patch to achieve a symmetrical radiation pattern and low cross polarization.

Description

technical field [0001] The invention belongs to the field of dual-polarization antennas in wireless communication, in particular to a differential feed dual-polarization antenna with broadband harmonic suppression in the field. Background technique [0002] Due to the advantages of high common-mode rejection and low noise in differential circuit systems, differential electronic devices and differential radio frequency microwave circuit systems have been extensively studied by researchers. The traditional single-ended antenna cannot be directly connected to the differential circuit system, and usually requires a broadband single-ended to differential power divider or balun for signal conversion, but this will introduce additional insertion loss and undesirable Impedance mismatch, so it is usually necessary to directly introduce a differentially driven antenna in the differential circuit system, so that it can be directly connected to the differential circuit system, thereby r...

AI Technical Summary

Problems solved by technology

[0003] In wireless communication, harmonic suppression has always been an important assessment index that affects the quality of communication systems, because the harmonic radiation at the transmitter can cause saturation of amplifiers such as power amplifiers, resulting in a reduction in their working efficiency and a strong The interference signal will cause interference to the nearby receiving system; and if the strong harmonic signal is received by the receiver, it will reduce the sensitivity of the receiving end, and even block the receiving end, making it unable to receive normal useful signals

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