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A quasioptical resonant-tunneling-diode oscillator operating above 200 GHz

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5 Author(s)
Brown, E.R. ; Lincoln Laboratory, MIT, Lexington, MA, USA ; Parker, C.D. ; Calawa, A.R. ; Manfra, M.J.
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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

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Microwave Theory and Techniques, IEEE Transactions on  (Volume:41 ,  Issue: 4 )