Circularly polarized wave beam electric scanning reflective array antenna

Abstract

The invention discloses a circularly polarized wave beam electric scanning reflective array antenna, which comprises a basic antenna, an additional structure for adjusting the resonance of the basic antenna, a radio frequency switch device for controlling the electric access of the additional structure, and a direct current bias circuit which is positioned on the back surface of the basic antenna and is used for realizing switch control. The access of the additional tuning structure is controlled through the radio frequency switch, so that the circular polarization work of the unit and the switching of the working modes of the unit are realized. The structure of the reflective array antenna unit is simplified by using the electric field distribution characteristic of the basic antenna working mode, which is shown in that the number of additional structures for adjusting resonance and the number of radio frequency switches are reduced, the complexity of the electric scanning circularly polarized reflective array antenna unit is reduced, and the implementation difficulty and the processing and manufacturing cost of the reflective array antenna are reduced.

Description

technical field [0001] The invention relates to the field of microwave and millimeter waves, in particular to a circularly polarized beam electronically scanning reflective array antenna. Background technique [0002] High-gain antennas with dynamically adjustable beam pointing have a wide range of practical needs in different military and civilian applications. Therefore, the research on electronically scanned reflectarray antennas has received extensive attention. At the same time, the application of circularly polarized waves can reduce the influence of the channel on the polarization of electromagnetic waves, and effectively solve the possible polarization mismatch problem of the transmitting and receiving antennas. Therefore, the development of beam electronically scanned reflectarray antennas with circularly polarized radiation characteristics is of great significance to military and civilian systems such as radar and next-generation communications. Generally speakin...

AI Technical Summary

Problems solved by technology

This makes the designed electronically scanned circularly polarized reflectarray unit have a more complex structure, and needs to be equipped with a considerable number of radio frequency switching devices to maintain the rotational symmetry of the structure, which also limits the implementation difficulty and manufacturing cost. Development and Fabrication of Large-Scale Electronically Scanning Circularly Polarized Reflectarray Antennas

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