Single-layer broadband microstrip array antenna with harmonic suppression

Abstract

The invention discloses a single-layer broadband microstrip array antenna with harmonic suppression. The antenna array comprises a single-layer dielectric substrate and an antenna array. Each antennaelement in the antenna array comprises a rectangular radiation patch, a T-shaped microstrip branch and a ground short-circuit probe. The T-shaped microstrip branch consists of three quarter-wavelengthresonators, and a ground short-circuit probe is inserted at an intersection point; the antenna units are connected with each other through microstrip lines, and the antenna array is fed with a probethrough a feeding point; In the antenna element, two symmetrical quarter-wavelength resonators in the T-shaped microstrip branch are adjacent to and parallel to the radiation edge of the rectangular radiation patch; the rectangular radiation patch in the antenna element is a common patch antenna, and the T-shaped microstrip branch has two resonant points offset from the center frequency, but doesnot participate in radiation. The antenna of the invention has the advantages of low cross section and simple structure, effectively increasing the antenna bandwidth, high harmonic suppression, stablegain in the working band and the like.

Description

technical field [0001] The invention belongs to the technical field of antennas, in particular to a single-layer broadband microstrip array antenna with harmonic suppression. Background technique [0002] With the continuous improvement of the level of science and technology and the advent of the information age, modern communication technology has been able to communicate quickly anytime and anywhere, quickly process data, and remotely control instruments and equipment. The combination of modern communication technology and aerospace navigation, mobile Internet, information processing and other technologies has brought mankind into the information age. The rapid development of modern communication technology puts forward more stringent requirements on the equipment. With the advent of the information age and the application of communication equipment with broadband characteristics, as an important part of the modern communication system, the performance of the antenna has ...

AI Technical Summary

Problems solved by technology

The microstrip antenna has its unique advantages, but because its radiation principle is the resonance of the antenna, it leads to one of its main shortcomings: the working frequency bandwidth is too narrow, and the frequency bandwidth of the general microstrip traveling wave antenna can reach hundreds of Tens of tenths, the microstrip slot antenna can reach 1%-10%, while the ordinary microstrip patch antenna is only 0.6%-3%

Existing techniques for increasing bandwidth include aperture coupling feeding, increasing the thickness of the dielectric substrate, reducing the dielectric constant of the substrate, adding a matching network, using multi-layer substrate technology, and adding a resonant circuit through slots, etc. These methods generally have Disadvantages such as complex structure, multi-layer structure, excessive electrical size and difficulty in forming an array

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