A radio frequency phase shifter

Abstract

The present invention provides a radio frequency phase shifter, comprising: multiple sections of first transmission lines, multiple sections of second transmission lines, multiple mixers and multiple couplers; multiple sections of first transmission lines are sequentially connected to form a mother transmission line, and multiple sections of second transmission lines are sequentially connected Another female transmission line is formed, and multiple sections of the first transmission line correspond to multiple sections of the second transmission line; a coupler is connected between two adjacent sections of the first transmission line, and a coupler is connected between two adjacent sections of the second transmission line, A mixer is connected between two corresponding couplers; when two input signals with different frequencies are transmitted on two bus transmission lines respectively, multiple mixers arranged in sequence output a set of output with phase gradient Signal. The present invention generates a group of signals with the same frequency but with a phase gradient by aliasing two input signals of different frequencies on a periodic node (mixer), and can change the phase gradient by changing the input frequency, thereby realizing phase Scan function.

Description

technical field [0001] The invention relates to the field of phased array antennas, in particular to a radio frequency phase shifter. Background technique [0002] The next generation of mobile communication 5G will bring a communication rate of tens or even hundreds of Gbps, far exceeding the current and previous communication systems. To achieve this goal, 5G not only utilizes broadband spectrum resources in multiple frequency bands, such as the millimeter-wave frequency band, but also uses large-scale antenna arrays to further increase channel capacity by utilizing the spatial diversity of electromagnetic wave transmission. [0003] In a phased array antenna, the phase of each antenna unit needs to be controlled in order to realize the beam property, which is usually realized by means of an analog phase shifter. The analog phase shifter generally directly changes the phase of the RF signal on the RF link. In a large-scale array, each antenna needs a set of phase shifters...

AI Technical Summary

Problems solved by technology

[0003] In a phased array antenna, the phase of each antenna unit needs to be controlled in order to realize the beam property, which is usually realized by means of an analog phase shifter. The analog phase shifter generally directly changes the phase of the RF signal on the RF link. In a large-scale array, each antenna needs a set of phase shifters to control the corresponding phase, resulting in a complex structure of the entire antenna system, high cost and difficult to control

Images