5G phased array phase shifter

Abstract

The invention belongs to the technical field of integrated circuits, and particularly relates to an active phase shifter of a 5G phased array. The system comprises a type network structure which is composed of a variable capacitor and a main-stage coil of a transformer; The grid electrode of the first transistor is connected with an input signal, and the drain electrode of the first transistor isconnected with the type network structure to amplify the input signal; The second transistor, the grid electrode and the source electrode are respectively connected with the grid electrode and the source electrode of the first transistor and are used for mirroring the alternating current signal current of the first transistor; The switch array is connected to the second transistor and a secondarycoil of the transformer, and the alternating current direction of the secondary coil is switched through the switch array, so that the inductance of the primary coil is changed; The grid electrode ofthe third transistor is connected with bias, the source electrode of the third transistor is connected with the type network structure, and the drain electrode of the third transistor is connected with output to compensate the insertion loss of the type network structure. The invention solves the problem that the traditional network structure phase shifter has the characteristics of small circuitsize, large phase adjustment range and low insertion loss.

Description

technical field [0001] The invention belongs to the technical field of integrated circuits, and in particular relates to a phase shifter for a 5G phased array. Background technique [0002] With the development of communication technology, the application of phased array system in radar, satellite broadcast communication system and GPS navigation system is more and more extensive. A phased array consists of many radiating and receiving units arranged into an array antenna, and each transmitting / receiving unit is equipped with a phase shifter. The computer changes the phase of the radio waves emitted by the antenna by controlling the phase shifter, so that the radar lobe can achieve phase deflection in the air to complete the space search. The core component in the phased array radar is the T / R (transmitting and receiving) component, and the phase shifter is a key part of the T / R component. Therefore, the performance of the phase shifter directly affects the performance of ...

AI Technical Summary

Problems solved by technology

The high and low pass phase shifter has high phase shift accuracy and wide operating frequency band, but occupies a large area and has a large insertion loss

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