Ultra-wideband adjustable phase shift unit loaded with fan-shaped line reflection load and phase shifter

Abstract

The invention discloses an ultra-wideband adjustable phase shift unit loaded with a fan-shaped line reflection load and a phase shifter. The ultra-wideband adjustable phase shift unit comprises an input node, an output node and a quadrature coupler. An input node for receiving a to-be-phase-shifted signal is connected with the input end of the quadrature coupler. An output node for outputting a phase shift signal is connected with an isolation end of the quadrature coupler. The straight-through end and the coupling end of the quadrature coupler are respectively connected with a single-port variable reflective load unit. According to the invention, a reflective phase-shifting circuit architecture of the quadrature coupler is adopted, so that good input and output standing wave characteristics can be realized in an octave range, a relatively large phase-shifting range and relatively low additional amplitude change are further realized in an ultra-wideband range, and the problem of circuit consistency caused by process fluctuation in production is greatly reduced.

Description

technical field [0001] The invention relates to the technical field of phase shifters, in particular to an ultra-wideband adjustable phase shifting circuit. Background technique [0002] Variable phase-shifting circuits are widely used in radar signal simulators, signal generators, phased array systems, electronic countermeasure systems and communication systems, etc., to control the signal phase. [0003] For ultra-broadband system applications, such as the emerging 5G millimeter-wave frequency band, the domestic frequency range is basically within the octave frequency range of 24-45GHz; for ultra-broadband applications larger than the octave range, the frequency band coverage of the variable phase shifter circuit is insufficient. The additional amplitude changes too much, which limits the application of the variable phase shifting circuit in broadband systems, or increases the complexity of the application system. [0004] Therefore, how to make the adjustable phase shift...

AI Technical Summary

Problems solved by technology

[0003] For ultra-broadband system applications, such as the emerging 5G millimeter-wave frequency band, the domestic frequency range is basically within the octave frequency range of 24-45GHz; for ultra-broadband applications larger than the octave range, the frequency band coverage of the variable phase shifter circuit is insufficient. The additional amplitude changes too much, which limits the application of variable phase shifting circuits in broadband systems, or increases the complexity of the application system

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