Electrical transmission or interconnection systems – Nonlinear reactor systems – Parametrons
Patent
1975-12-11
1976-12-28
Safourek, Benedict V.
Electrical transmission or interconnection systems
Nonlinear reactor systems
Parametrons
307 883, 321 69W, H02M 504
Patent
active
040004694
ABSTRACT:
A frequency mixer-downconverter which can be tuned as either a single sideband mixer or a double sideband mixer and which has a wide tunable RF bandwidth and low conversion loss is disclosed. A high-frequency input signal is coupled from an input waveguide to a shielded suspended stripline. Two Schottky barrier diodes are connected proximate to the waveguide-to-stripline transition, between the inner conductor and the outer conducting channel of the stripline. The two diodes intermodulate the input signal with a subharmonic pumping signal which is also coupled to the suspended stripline from a waveguide input. An intermediate frequency signal, at a frequency equal to the difference between the input signal and twice the frequency of the pumping signal, is generated as an intermodulation product and transmitted on the suspended stripline to an output. The downconverter can be tuned as either a single sideband mixer or a double sideband mixer by positioning an E-plane waveguide tuning short and an H-plane waveguide tuning short at the transition between the input waveguide and the suspended stripline. For a single sideband mixer the tuning shorts are adjusted to provide at the input waveguide-to-stripline transition a reactive termination at the image frequency and an impedance match at the input signal frequency. The tuning shorts are positioned to provide the same impedance match at both the image frequency and input signal frequency for double sideband tuning.
REFERENCES:
patent: 2455657 (1948-12-01), Cork et al.
patent: 2677757 (1954-05-01), Matare
patent: 2813973 (1957-11-01), McCoy et al.
patent: 3261981 (1966-07-01), Harwood et al.
patent: 3588727 (1971-06-01), Seidel
Bell System Technical Journal July- Aug. 1975, " Stripline Downconverter with Subharmonic Pump" : M.V. Schneider and W.W. Snell Jr., pp. 1179- 1183.
Microwave Transmission (McGraw Hill) by J.C. Slater, 1942, p. 298.
Handbook of Microwave Techniques and Equipment (Prentice Hall) H.E. Thomas, 1972, p. 152.
Bell Telephone Laboratories Incorporated
Gurey Stephen M.
Safourek Benedict V.
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