Tunable reflective phase shifter based on ferroelectric material

Abstract

The invention discloses a tunable reflective phase shifter based on ferroelectric materials, which comprises a plurality of tunable phase shifting units, and each tunable phase shifting unit comprises an input node, an output node, a quadrature coupler, a first reflective load unit and a second reflective load unit. The first reflective load unit and the second reflective load unit are respectively composed of two inductors and a tunable capacitor, the tunable capacitor comprises a substrate and a metal electrode, the substrate and the metal electrode are rectangular, the metal electrode is stacked on the substrate and completely coincides with the substrate, and the metal electrode is provided with an S-shaped groove extending from the front end to the rear end. The S-shaped groove penetrates through the metal electrode from top to bottom, the S-shaped groove is filled with a barium strontium titanate material, the bottom of the barium strontium titanate material is attached to the substrate, and the left end face and the right end face of the metal electrode are the two ends of the first tunable capacitor. The tunable reflective phase shifter has the advantages of simple structure, small size, low cost, small insertion loss and high working frequency.

Description

technical field [0001] The invention relates to a tunable reflective phase shifter, in particular to a tunable reflective phase shifter based on ferroelectric material. Background technique [0002] Phase shifters are widely used in radar signal simulators, signal generators, phased array systems, electronic countermeasures systems, and communication systems to control the phase of signals. There are two main types of existing phase shifters: loaded phase shifters and reflective phase shifters. Compared with loaded phase shifters, reflective phase shifters are simpler in structure, smaller in size, lower in cost, and more efficient. for a wide range of applications. [0003] At present, microwave and millimeter wave communication systems have widely used reflective phase shifters in the 5G millimeter wave frequency band. Existing reflective phase shifters are mainly realized by varactor diodes, switches, and ferrite electric tuning devices or ferrite magnetic tuning device...

AI Technical Summary

Problems solved by technology

Since devices such as varactor diodes and switches need to use additional circuit structures for matching, the structure of the reflective phase shifter is still relatively complicated, the size is also large, and the cost is still high. There are inevitably parasitic effects in the total components, so that the reflective phase shifter has a large insertion loss, and the working frequency cannot meet the application of millimeter-wave frequency band communication, and it is difficult to continue to improve

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