Design of a High-Average-Power Ferroelectric Phase Shifter

Abstract

This paper describes performance of a voltage controlled phase shifter designed for a high average power and a high figure of merit. The device is a reflection-type, resonant phase shifter that utilizes ferroelectric capacitors and impedance matching to the port impedance. With state-of-the-art ferroelectric materials, the device achieves a high Figure of Merit of nearly a thousand degrees phase shift per dB insertion loss at 800 MHz, along with sub-microsecond response. This phase shifter is capable of handling average power up to a megawatt. Its application is expected to enhance the electrical efficiency of particle accelerators, reducing both capital and operating costs.

Improved the clarity of the application of equation (14), which depends on the value of D being larger or smaller than 1