Title :
A programmable ultra-low noise X-band exciter
Author :
MacMullen, Alexander ; Hoover, Lowell R. ; Justice, Roy D. ; Callahan, Brian S.
Author_Institution :
Technology Service Corp., Los Angeles, CA, USA
fDate :
7/1/2001 12:00:00 AM
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.
Keywords :
circuit noise; exciters; frequency synthesizers; microwave generation; microwave oscillators; phase noise; programmable circuits; signal generators; SHF; X-band sapphire-loaded cavity oscillator; frequency translation circuitry; low noise UHF frequency synthesizer; microwave synthesizer; phase noise; programmable X-band exciter; ultra-low noise X-band exciter; upconversion circuitry; Circuit noise; Cranes; Frequency synthesizers; Low-noise amplifiers; Noise level; Noise measurement; Oscillators; Phase noise; Signal resolution; Working environment noise;
Journal_Title :
Ultrasonics, Ferroelectrics, and Frequency Control, IEEE Transactions on
