A Broadband Patch Antenna with Stable and High Gain

Abstract

The present invention provides a stable high-gain broadband patch antenna, which consists of a metal floor, a circular radiation patch, a differential feed port, a first short-circuit component, a second short-circuit component, a first metal sheet and a second metal sheet Composition; the diameter of the radiation patch is greater than half the free-space wavelength at the central operating frequency, and a first slit, a second slit and a third slit separated on both sides of the first slit are arranged on its first diameter position; the first metal The sheet and the second metal sheet are located between the metal floor and the radiation patch; the differential feed port is provided with a first feeder for feeding the first metal sheet, a second feeder for feeding the second metal sheet The electric body; the metal floor is connected to the radiation patch through the first short-circuit component and the second short-circuit component; between the first metal sheet and the second metal sheet, between the first feeder and the second feeder, and the first short circuit Between the component and the second short-circuit component, mirror images are distributed with respect to a plane passing through the first diameter and perpendicular to the radiation patch.

Description

technical field [0001] The invention relates to the technical field of patch antennas, in particular to a broadband patch antenna with stable and high gain. Background technique [0002] With the rapid development of wireless communication, microstrip patch antennas are widely used in various wireless communication devices due to their advantages of low profile, light weight and low cost. However, the traditional microstrip patch antenna has the following problems: 1. The bandwidth is narrow, which is not suitable for applications in environments with large bandwidth requirements; 2. The gain is low, and the application in the medium and long-distance wireless communication environment is limited. Improving the gain of the antenna by forming an array will increase the complexity of the feeding network of the antenna system and reduce the efficiency; 3. The cross polarization is poor, which seriously affects the anti-interference performance of the antenna. [0003] In recen...

AI Technical Summary

Problems solved by technology

However, the traditional microstrip patch antenna has the following problems: 1. The bandwidth is narrow, which is not suitable for applications in environments with large bandwidth requirements; 2. The gain is low, and the application in the medium and long-distance wireless communication environment is limited. Improving the gain of the antenna by forming an array will lead to higher complexity and lower efficiency of the feed network of the antenna system; 3. Poor cross polarization will seriously affect the anti-interference performance of the antenna

However, the introduction of a feed resonator feed will increase the feed loss of the antenna and increase the complexity of the antenna structure

In addition, the relative bandwidth that these two high-order mode broadband antennas can achieve is only about 6%, which limits their application in wireless communication environments with large bandwidth requirements

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