Fast X-Band Phase Shifter

A phase shifter to be the key element of an active high-power switch is described. This phase shifter employs ultra-fast, electrically-controlled ferroelectric elements. This high-power switch will allow one to build an active Delay Line Distribution System (DLDS), which would provide substantial reduction in the length of waveguide, compared to what would be required for the traditional passive DLDS design for NLC. The results of preliminary optimization of the phase shifter at the NLC frequency of 11.424 GHz are presented showing the feasibility of building the switch to control a power of 500 MW. Initial tests at a power of up to 50 MW are planned using the Omega-P/NRL X-band magnicon