A Bandwidth 180 Degree Phase Shifter Circuit

Abstract

The present invention provides a design of a phase shifter circuit with a bandwidth of 180 degrees. The phase shifter circuit includes a single-ended to differential circuit, a differential to single-ended circuit, and a circuit connected between the single-ended to differential circuit and the differential to single-ended circuit. switch circuit. The single-ended to differential circuit divides the single-ended signal into two signals with a phase difference of 180 degrees and outputs them to the switch circuit, and controls the on / off of each switch path to output two signals with a phase difference of 180 degrees to the input of the differential to single-ended circuit end, synthesized into a single-ended signal output. In the present invention, the single-end-to-differential circuit and the differential-to-single-end circuit can adopt the same or different circuit design structures; the switches in the switch circuit can adopt various implementation methods such as field effect transistors, triodes, or PIN diodes. The phase shifter circuit provided by the solution of the invention can realize large bandwidth and high phase shifting precision, the phase shifting performance of the circuit is less affected by temperature and process changes, and the load effect of the circuit is small and other technical effects.

Description

technical field [0001] The content of the present invention relates to the field of communication technology, in particular to a design and application of a phase shifter circuit capable of realizing a bandwidth of 180 degrees. Background technique [0002] As a general-purpose signal phase control circuit, phase shifting circuit is widely used in mobile communication, phased array radar system and other fields to control the phase of radar phased array antenna and direction controllable communication link. For radio frequency and microwave systems, phase shifting circuits provide functional circuits with controllable phase differences for radio frequency signals in phased arrays. [0003] figure 1 It is a typical application example of the phase shifter in the prior art. The radio frequency or microwave signal is transmitted to the phase shifter device through the antenna, and its phased array chip changes the shape of the pattern by controlling the feeding phase of each ...

AI Technical Summary

Problems solved by technology

The single-ended balun circuit directly realizes 180-degree phase-shift output. The design structure of the phase-shift circuit and the design structure of the switch circuit will have a certain impact on the phase-shift accuracy, and the load effect of the phase-shift circuit will further affect the performance of the phase shifter circuit.

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