Transient phase response of a solid state pulsed X-band source

A solid state pulsed X-band source (crystal oscillator-multiplier type) yielding low transient phase distortion and high on/off ratio is described. Design tradeoffs are discussed, and it is shown that placing the RF switch before the last frequency multiplier is a suitable compromise design. Low switch VSWR and good bias stability in the switched stages are necessary for satisfactory transient phase performance.