A Microstrip Line Ferrite Phase Shifter Based on LTCC

Abstract

An LTCC-based microstrip line ferrite phase shifter belongs to the technical field of microwave communication. Including microwave input end, input end matching microstrip line, ferrite substrate, serpentine microstrip line structure on the ferrite substrate, magnetizing current coil, output end, output end matching microstrip line, the serpentine The microstrip line structure includes input serpentine microstrip line, transition serpentine microstrip line and output serpentine microstrip line, the input serpentine microstrip line is perpendicular to the transition serpentine microstrip line, and the transition serpentine microstrip line and the output The magnetizing current coil includes a first coil, a second coil, and a third coil, respectively applying a DC bias field to the input serpentine microstrip line, the transition serpentine microstrip line, and the output serpentine microstrip line. The serpentine microstrip line structure of the microstrip line ferrite phase shifter of the present invention is composed of three serpentine microstrip lines, which can realize the The direction of the upper bias field achieves different magnitudes of phase shift.

Description

technical field [0001] The invention belongs to the technical field of microwave communication, and in particular relates to a miniaturized microstrip line ferrite phase shifter based on LTCC technology. Background technique [0002] The traditional mechanical scanning radar changes the direction of the beam by mechanically rotating the antenna, which is difficult to control precisely and has low efficiency. However, the phased array radar uses a phase shifter to change the direction of the beam, which has become the development trend of radar today. In order to give full play to the advantages of phased array radar, the research of phase shifter with low loss, wide frequency band and large phase shift has become a key technology. [0003] At present, common phase shifters include ferroelectric phase shifters, MEMS phase shifters, semiconductor phase shifters and ferrite phase shifters. The ferroelectric phase shifter has the advantages of low cost, low power consumption an...

AI Technical Summary

Problems solved by technology

However, the existing ferrite phase shifters, including waveguide-based, substrate-integrated waveguide (SIW) type, stripline and microstrip ferrite phase shifters, cannot be realized without changing the structure. The continuous change of phase can only achieve a single maximum phase shift

Images