Low-loss digital phase shifter

Abstract

One embodiment of the invention discloses a low-loss digital phase shifter, which comprises an input unit, a 180-degree phase shifting unit, a 90-degree phase shifting unit, a 45-degree phase shiftingunit, a 22.5-degree phase shifting unit and an output unit, and is characterized in that the 180-degree phase shifting unit, the 90-degree phase shifting unit, the 45-degree phase shifting unit and the 22.5-degree phase shifting unit are connected in series. According to the low-loss digital phase shifter, the transmission loss is effectively reduced, the isolation degree and the power capacity between branches are improved, the phase shifter can achieve high-precision phase shifting within the whole working frequency range, the problem that a traditional digital phase shifter is high in lossis well solved, and the low-loss digital phase shifter has high reliability and can be used for engineering practice.

Description

technical field [0001] This application relates to the field of digital phase shifters. More specifically, it relates to a low-loss digital phase shifter. Background technique [0002] The microwave phase shifter is a microwave control circuit, its main function is to control the phase of the microwave signal to meet the needs of the system. Phase shifters have very broad application prospects in many fields such as phased array radar, microwave communication, and satellite technology. Especially in the phased array radar system, the digital phase shifter is the key component of the T / R module. The entire radar phase shifter is used to scan the beam in the air. The loss, power capacity, phase shifting accuracy and response of the phase shifter The quality of the speed and other indicators directly affects the accuracy of the positioning of the system beam in the air and the suppression degree of the main lobe of the beam to the side lobe. [0003] The traditional digital ...

AI Technical Summary

Problems solved by technology

[0003] The traditional digital phase shifter closes the feed loop. On the transmission path, each phase shifting unit needs to add a bias inductor and a DC blocking capacitor, resulting in increased loss and poor electrical performance.

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