Electric power conversion systems – Frequency conversion without intermediate conversion to d.c. – By semiconductor converter
Patent
1976-08-30
1978-07-04
Goldberg, Gerald
Electric power conversion systems
Frequency conversion without intermediate conversion to d.c.
By semiconductor converter
330 49, 331 42, 363158, H02M 520
Patent
active
040992284
ABSTRACT:
A harmonic mixer utilizing an anti-parallel configuration of two diodes which, when excited by a voltage waveform V.sub.LO sin .omega..sub.LO t + V.sub.s sin .omega..sub.s t where V.sub.LO is much greater than V.sub.s, yields a terminal current having angular frequency components m .omega..sub.LO .+-. n .omega..sub.s with the restriction that m + n is an odd integer. The diode configuration results in low conversion loss mixing when the local oscillator frequency is a subharmonic of the usually required local oscillator frequency, suppression of local oscillator noise sideband effects without the use of filters or hybrid junctions, and suppression of direct video detection.
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B.S.T.J. Brief vol. 53, No. 6, Jul.-Aug. 1974, pp. 1179-1183, "Stripline Down Converter With Subharmonic Pump" by Schneider and Snell, Jr.
"Harmonically Pumped Stripline Down-Converter" by Schneider et al.; IEEE Trans. on Microwave Theory. vol. MTT-23, No. 3 pp. 271-275, Mar. 1975.
AEU vol. 25, pp. 52-53, Jan. 1971 "A Sub-Harmonic Swept Shottky Barrier Diode Mixer In Microstrip".
Goldberg Gerald
Trepp R. M.
Westinghouse Electric Corp.
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