Microstrip Switch Phase Shifter and Phase Shift Module Using It

Abstract

The invention provides a microstrip switch type phase shifter and a phase shifting module using the same. The microstrip switch type phase shifter comprises a reference branch circuit, a phase shifting branch circuit, a first path selection switch and a second path selection switch, wherein the reference branch circuit comprises a first microstrip transmission line; the phase shifting branch circuit comprises a second microstrip transmission line and a third microstrip transmission line which are connected in series, and a fourth microstrip transmission line connected between a node between the second and third microstrip transmission lines and the ground level; the front end of the first path selection switch is connected to a signal input end, the rear end of the second path selection switch is connected to a signal output end, and the first and second path selection switches are simultaneously connected to the reference branch circuit and the phase shifting branch circuit under control. By adopting continuous microstrip lines and a simple topological structure, the phase shifter and the phase shifting module reduce parasitical parameters caused by discontinuous microstrip lines, can be applied to high-frequency scenarios, meanwhile, have very flat phase shifting characteristic nearby center frequency by simulation and experimental proof, and have high phase shifting precision.

Description

technical field [0001] The invention relates to the field of microwave technology, in particular to a microstrip switch type phase shifter and a phase shifting module using the same. Background technique [0002] With the popularization of a large number of smart terminals such as smartphones and tablet computers, the demand for high-speed mobile data services is increasing day by day. With the current growth rate of demand for communication capacity, it is estimated that the total mobile data volume will increase by a thousand times around 2020, which poses a serious challenge to the next generation of mobile communication systems. Compared with the increasingly depleted spectrum below 3GHz, the millimeter wave frequency band has very rich spectrum resources, which can meet the needs of future high-speed broadband mobile communications. In addition, in the millimeter wave frequency band, space division multiple access and beam combination can be combined with time division...

AI Technical Summary

Problems solved by technology

[0006] 3. Low cost. A large number of phase shifters are required in the phased array transceiver. If the price of the phase shifter is high, the cost of communication equipment will be expensive, which is unacceptable for civilian mobile communications.

Images