Miniaturized and low-cost 0-degree/90-degree switching line type phase shifter

Abstract

The invention discloses a miniaturized and low-cost 0-degree / 90-degree switching line type phase shifter, which comprises a microwave signal input end, a high-frequency signal output end, a bent transmission line and an impedance matching transmission line, wherein the bent transmission line is used for providing a phase difference and is composed of two sections of transmission lines which are connected in series between the microwave signal input end and the high-frequency signal output end and arranged side by side; the impedance matching transmission line is a section of transmission line,the terminal of the impedance matching transmission line is grounded, and the front end of the impedance matching transmission line is connected with the microwave signal input end and the high-frequency signal output end through a control switch. When two control switches are switched off, the microwave signal reaches the signal output end through the bent transmission line and is a reference phase of 0 degree; when the two control switches are both closed, microwave signals directly flow to the signal output end through the control switches and the front end of the impedance matching transmission line, and a 90-degree phase shift quantity is generated. The miniaturized and low-cost 0-degree / 90-degree switching line type phase shifter has the advantages of miniaturization, low cost and the like, the design complexity of a phased-array feed network is simplified, and the cost of the whole antenna array is effectively reduced.

Description

technical field [0001] The invention belongs to the field of microwave technology, and relates to a microwave circuit phase shifter, in particular to a miniaturized and low-cost 0° / 90° switch linear phase shifter. Background technique [0002] Modern communications are increasingly demanding phased array antennas with high-speed beam scanning capabilities. However, the high cost and complex design of the phased array antenna often restrict its application in production and life. In a phased array antenna, each element needs to be phase controlled independently, so the electronically controlled phase shifter is an essential key component of the phased array antenna. The low-cost, miniaturized phase shifter helps to simplify the design complexity of the phased array feed network and effectively reduce the cost of the entire antenna array. [0003] In the microwave frequency band, according to different working principles, common phase shifters can be divided into loaded line...

AI Technical Summary

Problems solved by technology

[0004] A conventional switched linear phase shifter such as figure 1 As shown, it is necessary to use four switches to control the circuit state to switch the phase shift amount, and the cost is high; the two transmission lines controlled by the switch need to be separated by a long distance to avoid attenuation and phase error caused by coupling, which will cause other problems. larger size

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