Miniature microstrip antenna

Abstract

The invention discloses a miniature microstrip antenna, which comprises a microstrip patch, a grounding part, a medium substrate, a feeder line and a resonant cell. The medium substrate is positioned between the microstrip patch and the grounding part; the resonant cell is arranged in the medium substrate; and the feeder line is electrically connected with the resonant cell. In the technical scheme, compared with the common microstrip antenna, the microstrip antenna loaded with a small resonant ring has the advantages that: the longitudinal size of the common microstrip antenna is about half of the wavelength, and after the substrate is loaded with the small resonant ring, the longitudinal size of the microstrip antenna can be made smaller, so that the size of the microstrip antenna can be greatly reduced, and the bandwidth can be increased.

Description

technical field [0001] The invention relates to the technical field of antennas, in particular to a miniaturized microstrip antenna. Background technique [0002] The traditional microstrip antenna is on a thin dielectric substrate, one side is attached with a thin metal layer as the grounding part, and the other side is made of a certain shape metal patch by photolithography and etching, and the microstrip line or coaxial probe is used to pair Antenna composed of patch feed. [0003] Traditional microstrip antenna miniaturization design methods mainly include the following: [0004] 1. Antenna loading, load a short-circuit probe on the microstrip antenna, and introduce a coupling capacitor into the resonant cavity through the short-circuit probe close to the feed point to achieve miniaturization. The resonant frequency of the antenna mainly depends on the thickness and position of the short-circuit probe. Its disadvantages are: impedance matching greatly depends on the po...

AI Technical Summary

Problems solved by technology

The resonant frequency of the antenna mainly depends on the thickness and position of the short-circuit probe, and its disadvantages are: impedance matching greatly depends on the position of the short-circuit probe and its distance from the feeding point, which is not conducive to production and narrow bandwidth

The main disadvantages are: strong surface waves are excited, large surface losses, reduced efficiency, and narrow bandwidth

Its characteristics: As the length of the slot increases, the resonant frequency of the antenna decreases, and the size of the antenna decreases, but excessive reduction in size will cause a sharp deterioration in performance, especially the bandwidth and gain. How to break the two limitations of gain and bandwidth, development Practical, easy-to-tune antennas of this type are yet to be further studied

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