Numerical simulation and experimental research of coaxial-inserting-fin phase shifter

Coaxial-inserting-fin phase shifter is a new kind of high power microwave phase shifter. Based on the fundamental working principle of coaxial-inserting-fin phase shifter, numerical simulation and optimization design are presented and its structure and control system are discussed. A coaxial-inserting-fin phase shifter model with a central frequency of 4.1 GHz is designed and fabricated. Experiment has been carried out with the vector network analyzer, which shows that in the range of 4.0-4.2 GHz, the phase shifter can realize a phase shift of 90°, phase shift precision realizable can be 1° and phase shift precision is ± 10°, the insertion loss of this phase shifter is over 1.5 dB.