New high-precision continuously adjustable phase shifter

Abstract

A new high-precision continuously adjustable phase shifter has the core idea to change the amplitude of the input signal by the trigonometric function auxiliary angle formula, that is to change the phase of the output signal, and has the most important advantage that the output phase is continuously adjustable and simple to implement. A simple voltage parallel negative feedback circuit that changes the amplitude of the input signals V2 and V1 and changes the size of the resistors R2 and R1 is capable of changing the phase of the output signal.

Description

technical field [0001] The invention relates to the field of phase shifters, in particular to a novel phase shifter with high precision and continuous adjustment. Background technique [0002] Phase shifter is an important device in microwave components. As the most basic functional device for applying phase information, it has the same status and function as amplifiers and attenuators in amplitude applications [1]. The phase shifter will produce a certain amount of phase shift for the transmitted electromagnetic wave, thereby changing the phase of the electromagnetic wave in the transmission line. It can be said that it is a key device for realizing high-power microwave phase control and power combination [2]. Therefore, phase shifters are widely used in radar systems, missile attitude control, accelerators, microwave communication instruments and even music. [0003] At present, the main technical difficulties faced by the phase shifter design lie in the complex structure...

AI Technical Summary

Problems solved by technology

There are mainly three problems in the development stages of the above four phase shifters: first, in the above four development stages, the phase shifter is specially designed as a separate part, which not only increases the design cost of the circuit system and The complexity also increases the design cycle of the circuit; moreover, it is difficult for the previous phase shifters to achieve high-precision phase adjustment; in addition, the current digital phase shifter has the problem of the number of phase shifts [4], that is, when the phase shifter Generally, there is a step value, and continuous phase modulation is not possible

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