Title :
A highly sensitive millimeter wave quasi-optical FM noise measurement system
Author :
Smith, Graham M. ; Lesurf, Jim C G
Author_Institution :
Dept. of Phys. & Astron., St. Andrew´´s Univ., Fife, UK
fDate :
12/1/1991 12:00:00 AM
Abstract :
A highly sensitive, tunable, low-loss quasi-optical millimeter wave FM noise measurement system using a matched, easily tunable quasi-optical cavity in reflection, to act as a carrier suppression filter, is described. This can operate with matched cavity Q´s of several hundred thousand with almost zero insertion loss to provide an extremely high discriminator slope at low power levels. The FM noise measurement system can allow direct measurement of phase-locked sources at low input power levels over ultra-wideband frequency ranges
Keywords :
cavity resonators; electric noise measurement; frequency modulation; microwave measurement; FM noise measurement system; carrier suppression filter; direct measurement; low input power levels; low loss quasioptical system; matched cavity Q-factors; millimeter wave; phase-locked sources; tunable quasi-optical cavity; ultra-wideband frequency ranges; Acoustic reflection; Delay lines; Frequency measurement; Local oscillators; Millimeter wave measurements; Millimeter wave technology; Noise measurement; Phase measurement; Phase noise; Ultra wideband technology;
Journal_Title :
Microwave Theory and Techniques, IEEE Transactions on
