Wideband microstrip antenna

Abstract

The invention discloses a broadband micro-strip antenna, which belongs to the technical field of antenna. The antenna consists of a transmission feeder, a composite right / left-handed nonlinear transmission line and a medium substrate, wherein the composite right / left-handed nonlinear transmission line is connected with the medium substrate, and the transmission feeder is connected with the composite right / left-handed nonlinear transmission line. The composite right / left-handed nonlinear transmission line is formed by alternately and serially connecting at least one left-handed nonlinear transmission line and one right-handed nonlinear transmission line; the left-handed nonlinear transmission line consists of a series variable capacitor and a parallel inductor; and the right-handed nonlinear transmission line consists of a series inductor and a parallel variable capacitor. The broadband micro-strip antenna uses the composite right / left-handed nonlinear transmission line to substitute a metal conductor slice on the prior micro-strip antenna, the left-handed nonlinear transmission line has high-pass characteristic, the right-handed nonlinear transmission line has low-pass characteristic, and the composite right / left-handed nonlinear transmission line has band-pass characteristic and greatly expands the bandwidth of the micro-strip antenna.

Description

technical field [0001] The invention relates to the technical field of antennas, in particular to a broadband microstrip antenna. Background technique [0002] Microwave relay communication belongs to the wireless communication method, and the receiving and sending of radio waves is completed by the antenna, specifically: the signal output by the microwave transmitter is sent to the antenna through the feeder, and the antenna transmits wireless electromagnetic waves to the opposite end; The wireless electromagnetic waves emitted by the terminal are sent to the microwave receiver through the feeder. In practical applications, the performance of the antenna will directly affect the normal operation of the entire microwave communication system. [0003] In the past 50 years, microstrip antenna technology has become the fastest growing technology in the field of antenna technology, especially in the 1970s, with the development of microwave monolithic integrated circuit (Monolit...

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Problems solved by technology

[0005] However, due to the characteristics of the structure of the microstrip antenna itself, it is mainly reflected in the narrow frequency band of the radiating element of the metal conductor sheet, which makes its performance in bandwidth not as good as other types of antennas, and it is difficult to meet the frequency bandwidth of transmitting / receiving signals at the same time, and transmit low efficiency

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