Small-size UWB (ultra wide band) microstrip antenna applied in field of railway communication

Abstract

The invention discloses a small-size UWB (ultra wide band) microstrip antenna applied in the field of railway communication, and the microstrip antenna comprises a substrate, a radiation patch locatedon the front surface of the substrate, and a correction ground which is located on the back surface of the substrate. The central axis of the radiation patch and the central axis of the correction group are located on the same straight line, and the radiation patch sequentially comprises a radiator, a gradual change part and a feed part, wherein the radiator, the gradual change part and the feedpart are sequentially connected. The radiator comprises a first part and a second part, which are connected with each other. The second part is shaped like T, and the gradual change part is an integrated body of a rectangle and an inverted isosceles trapezoid. The feed part is a fine and long rectangle, and the correction ground is concave. The antenna solves the problems that an antenna used in the field of railway communication is bigger in size, is difficult for installation and integration, is narrower in communication band, is poor in accuracy and is lower in gain.

Description

technical field [0001] The invention belongs to the technical field of antennas, and in particular relates to a miniaturized ultra-wideband (UWB) microstrip antenna applied in the field of railway communication. Background technique [0002] Ultra Wideband (UWB, Ultra Wideband) communication technology originated in the late 1950s, and was mainly used as military technology in radar and other communication equipment before. With the rapid development of contemporary wireless communication technology, people have put forward higher requirements for high-speed wireless interconnection, and the civilian use of ultra-wideband technology has been proposed again, and has attracted people's attention. UWB usually refers to a pulse signal whose absolute signal bandwidth is greater than 500MHz or the ratio of the signal bandwidth to the center frequency is greater than 25%. UWB is different from the continuous carrier used in common communication methods. It uses extremely short pul...

AI Technical Summary

Problems solved by technology

[0009] Aiming at the above-mentioned deficiencies in the prior art, the present invention provides a new type of ultra-wideband microstrip antenna applied in the field of railway communication, which is small in size, simple in installation and integration, wide in communication frequency, good in accuracy and high in gain, and solves the problem of railway The antennas used in the communication field have the problems of large size, difficult installation and integration, narrow communication frequency band, poor accuracy and low gain

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