Novel circularly polarized millimeter wave broadband planar reflection array antenna with multiple frequency points excited by positive feedback

Abstract

The invention discloses a novel circularly polarized millimeter wave broadband planar reflection array antenna with multiple frequency points excited by positive feedback, and belongs to the technicalfield of microwaves. The antenna comprises a dielectric substrate, a grounding plate, a feed source and a microstrip n * n petal reflection array, wherein the microstrip n * n petal reflection arraycomprises n * n single-layer tight coupling petal units; the n * n single-layer tight coupling petal units are uniformly arranged on the upper surface of the dielectric substrate according to a recursive relationship and are distributed in a certain angle rotation manner, and the surface of the microstrip n * n petal reflection array faces the feed source; each tight coupling petal unit is a regular polygon split-ring resonator which comprises 2 * M regular polygon split-ring resonators which are equal in size and surround a regular 2 * M polygon gap, and the regular polygon split-ring resonators of different sizes work at different frequencies to form a multi-resonance unit; and the back surface of the dielectric substrate is provided with a rectangular grounding plate. The antenna can work in different millimeter wave bands including 5G specifications, is designed as required, and has the advantages of good radiation performance, simple structure, low cost and easiness in engineeringrealization.

Description

technical field [0001] The invention belongs to the field of microwave technology, and in particular relates to a novel circularly polarized millimeter-wave broadband planar reflection array antenna with forward-feed excitation and multi-frequency points. Background technique [0002] Traditional high-gain antennas mainly include reflector antennas represented by large parabolic antennas and microstrip patch array antennas represented by phased array antennas. Large-scale reflector antennas are simple in design, theoretically infinite in gain bandwidth, and have high efficiency and strong directivity, but they are bulky and difficult to deploy, requiring a complex servo system. The curved surface structure requires high processing accuracy, especially in the millimeter wave band. , beam scanning can only be achieved by mechanical rotation is also a disadvantage. Microstrip patch array antennas often have a low profile, and PCB etching technology is mature. The phase and amp...

AI Technical Summary

Problems solved by technology

Large-scale reflector antennas are simple in design, theoretically infinite in gain bandwidth, and have high efficiency and strong directivity, but they are bulky and difficult to deploy, requiring a complex servo system. The curved surface structure requires high processing accuracy, especially in the millimeter wave band. , beam scanning can only be achieved by mechanical rotation is also a disadvantage

Microstrip patch array antennas often have a low profile, and PCB etching technology is mature. The phase and amplitude of the radiating element can be adjusted independently by phase shifting, and it is easy to realize beam scanning. However, for ultra-large-scale arrays, the design of the feed network is complicated. The cost of T / R components required for electronic scanning is high, and the loss of the millimeter wave band increases sharply

Images