Title :
A quasioptical resonant-tunneling-diode oscillator operating above 200 GHz
Author :
Brown, E.R. ; Parker, C.D. ; Calawa, A.R. ; Manfra, M.J. ; Molvar, K.M.
Author_Institution :
Lincoln Laboratory, MIT, Lexington, MA, USA
fDate :
4/1/1993 12:00:00 AM
Abstract :
A quasioptical resonant-tunneling-diode (RTD) oscillator is demonstrated at frequencies above 200 GHz. The oscillator is stabilized by a semiconfocal open cavity. The maximum output power and the linewidth are approximately 50 μW and 20 kHz, respectively, at a fundamental frequency of 210 GHz. By varying the cavity length, the oscillator frequency can be adjusted over a 0.4-GHz range in a repetitive manner. This behavior is explained by analogy with laser oscillators. The quasioptical RTD oscillator is well suited as a local oscillator for low-power radiometric mixers
Keywords :
cavity resonators; microwave oscillators; resonant tunnelling devices; solid-state microwave circuits; tunnel diodes; variable-frequency oscillators; 200 to 220 GHz; 210 GHz; EHF; LO; MM-wave type; VFO; cavity length variation; fundamental frequency; local oscillator; low-power radiometric mixers; quasioptical RTD oscillator; resonant-tunneling-diode; semiconfocal open cavity; Diodes; Doping profiles; Fabrication; Frequency; Gallium arsenide; Local oscillators; Power generation; Radiometry; Resonant tunneling devices; Solid state circuits;
Journal_Title :
Microwave Theory and Techniques, IEEE Transactions on
