Dual-band dual-polarization wave-beam-controllable microstrip reflective array antenna

Abstract

The invention discloses a dual-band dual-polarization wave-beam-controllable microstrip reflective array antenna. The dual-band dual-polarization wave-beam-controllable microstrip reflective array antenna comprises a dielectric substrate, a reflective structure and an antenna feed source, wherein M*N periodically-arranged metal patch units are etched on the upper surface of the dielectric substrate; M and N are integers, wherein M is greater than 1 and less than 50; N is greater than 1 and less than 50; the reflective structure is positioned on the lower surface of the dielectric substrate; a metal floor structure is adopted; and the antenna feed source is positioned in the upper half space of a radiation structure. By adoption of the dual-band dual-polarization wave-beam-controllable microstrip reflective array antenna, the problem that continuous wave-beam scanning cannot be realized by a conventional microstrip reflective array antenna which can only work in a single-band or single-polarization mode is solved; by employing the metal patch units and variable capacitance diodes, the dual-band dual-polarization wave-beam-controllable microstrip reflective array antenna realizes reconfigurable frequency, reconfigurable polarization and wave-beam continuous scanning, thereby satisfying requirements of a radar and a communication system on multifunctional caliber multiplexing; and therefore, the dual-band dual-polarization wave-beam-controllable microstrip reflective array antenna can be applied to the wireless communication field.

Description

technical field [0001] The invention belongs to the technical field of communication, and further relates to a dual-frequency dual-polarization beam controllable microstrip reflector array antenna in the field of electromagnetic field and microwave technology. The invention can be used in the microwave band, and the antenna can work in a dual-frequency dual-polarization mode, and is suitable for a modern multi-functional aperture multiplexing antenna system. Background technique [0002] The microstrip planar reflectarray antenna combines some of the advantages of the traditional parabolic antenna and the large phased array antenna. It has the advantages of simple structure, low loss, easy integration, low cost, high efficiency, and precise control of the beam. It can be widely used in Radar, satellite communication and other fields. With the continuous development and improvement of electronic wireless communication technology, both radar and communication systems expect a...

AI Technical Summary

Problems solved by technology

However, the deficiencies that still exist in this antenna structure are, first, because the antenna structure is fixed, the antenna can only work at a single operating frequency and a single polarization mode, which cannot meet the needs of radar and communication systems for multifunctional antenna systems

Second, although the antenna realizes beam scanning, the antenna can only realize discrete beam scanning and cannot realize beam continuous scanning

However, the deficiencies of this antenna structure still exist. First, due to the fixed structure of the antenna, the antenna can only work at a single operating frequency and a single polarization mode, which limits the application range of the antenna and cannot meet the needs of radar and communication systems. The Need for a Multi-Functional Antenna System

Second, although the antenna realizes beam scanning, it adopts a mechanical rotation structure, which can only realize discrete beam pointing, and cannot realize continuous beam scanning

[0005] To sum up, the current microstrip reflectarray antenna is facing two problems. One is that the existing microstrip reflectarray antenna can only work at a single operating frequency and a single polarization mode due to its fixed structure, which cannot meet the needs of radar and communication. System requirements for multifunctional antenna systems

The second is that the existing traditional beam-scanning microstrip reflectarray antenna loaded with MEMS switches and digital phase shifters can only realize discrete beam scanning and cannot realize beam continuous scanning

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