A Balanced Microwave Phase Shifter for Antenna

Abstract

The invention discloses a balance type microwave phase shifter for an antenna. The phase shifter comprises a delay wire unit and a reference wire unit, wherein the reference wire unit comprises a pair of coupling wires arranged between a pair of balance type input and output ports, the delay wire unit comprises a pair of coupling wire between another pair of balance type input and output ports, and middle portions of the coupling wires of the delay wire unit are loaded with half-wavelength transmission wires. The phase shifter is advantaged in that the phase shifter having the common mode inhibition function is firstly proposed, compared with a single-end phase shifter, the phase shifter can be in direct butt joint with other balance type circuits when the phase shifter is applied to a balance type system or antenna, and adding multiple extra balance-to-unbalance conversion devices- Balun can be avoided; compared with a balance type phase shifter in the prior art, not only can stable phase shift of difference signals in a certain frequency scope be realized, but also the common mode signal inhibition function is realized, and stronger anti-interference capability is realized.

Description

technical field [0001] The invention relates to the field of microwave communication, in particular to a balanced microwave phase shifter used for antennas. Background technique [0002] A phase shifter is a component that controls the relative phase of signals. In a microwave circuit, a phase shifter can control the emission direction of a microwave beam by controlling the phase of the microwave. It is widely used in the fields of phased array radar, missile attitude control, communication, instrument measurement and even music. [0003] From the point of view of the port structure, there are two types of phase shifters: single-ended and balanced. At present, the research on phase shifters mainly focuses on the single-ended structure, and the research on balanced phase shifters is very little. The balanced phase shifter is a new type of phase shifter. In terms of circuit form, it can be directly connected with other balanced circuits, avoiding the addition of multiple bal...

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a balanced microwave phase shifter for antenna in view of the existing balanced microwave phase shifter lack of common-mode suppression ability and poor immunity to environmental noise

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