title: A programmable ultra-low noise X-band exciter.
abstract: A programmable ultra-low noise X-band exciter has been developed using commercial off-the-shelf components. Its phase noise is more than 10 dB below the best available microwave synthesizers. It covers a 7% frequency band with 0.1-Hz resolution. The X-band output at +23 dBm is a combination of signals from an X-band sapphire-loaded cavity oscillator (SLCO), a low noise UHF frequency synthesizer, and special-purpose frequency translation and up-conversion circuitry.
authors.affiliation: Technology Service Corporation, Los Angeles, CA 90064-1550, USA. smacmullen@tsc.com
authors.forename: A
authors.initials: A
authors.lastname: MacMullen
authors.forename: L R
authors.initials: LR
authors.lastname: Hoover
authors.forename: R D
authors.initials: RD
authors.lastname: Justice
authors.forename: B S
authors.initials: BS
authors.lastname: Callahan