A novel high-power waveguide phase shifter with continuous linear phase adjustment

Abstract

A novel all-metal phase shifter with continuous linear phase adjustment for high-power microwave applications is presented and tested in this paper. The phase adjustment is achieved through the rotation of a phase reverser for a circularly polarized wave, and the output phase accomplishes a phase adjustment range of 360° by rotating the phase reverser for 180°. Due to the symmetrical characteristics, its position after rotating 180° is the same as the initial position, which can achieve continuous phase adjustment and avoid phase mutation. Simulation results indicate that the phase shifter achieves the transmission efficiency greater than 99.90% at a center frequency of 8.4 GHz, and the bandwidth of transmission efficiency greater than 98.00% is up to 50 MHz. Experiments are carried out and the measured results are in good agreement with simulation. To sum up, the power capacity of this phase shifter is estimated to be more than 80 MW under vacuum conditions (<10−3 Pa), and it can be applied to fast continuous high-power beam-steerable antenna arrays or mode conversion systems.

A Novel High-Power Rotary Waveguide Phase Shifter Based on Circular Polarizers

“…The waveguide rotating contact surface of a rotary waveguide phase shifter is less prone to wear, making it more durable. There are mainly three types of rotary waveguide phase shifters in the literature: the pressure elliptical waveguide phase shifter [14], the waveguide gap bridge rotary adjustable phase shifter [15], and the TEM-mode phase shifter [16]. The pressure elliptical waveguide phase shifter has a wide working frequency band, but its phase shift has a nonlinear relationship with the rotation angle, resulting in lower phase-shifting accuracy.…”