Series RF/parallel if mixer array

Details Series RF/parallel if mixer array Series RF/parallel if mixer array

1988-03-07

1990-09-04

Safourek, Benedict V.

Telecommunications

Receiver or analog modulated signal frequency converter

Frequency modifying or conversion

455323, 455325, H04B 126

Patent

active

049550853

ABSTRACT:
An RF/IF mixer array employs serially connected capacitors and parallel connected inductors to increase the net impedance of a plurality of mixers at RF frequencies and to reduce the net impedance of the plurality of mixers at IF frequencies. Although the mixer elements may be virtually any type elements including Schottky diodes, the invention is particularly well suited to be used with SIS tunneling junction mixer elements which typically require such impedance transformation for efficient signal transfer in highly sensitive heterodyne receivers such as those used in radio astronomy.

REFERENCES:
patent: 4450584 (1984-05-01), Saka et al.
patent: 4566132 (1986-01-01), Meyer et al.
patent: 4598424 (1986-07-01), Watanabe et al.
"SIS Mixer to HEMT Amplifier Optimum Coupling Network"; S. Weinreb, IEEE Transactions on Microwave Theory and Techniques; vol. MTT-35, No. 11, Nov. 1987, pp.1067-1069.
"Large Gain, Negative Resistance and Oscillations in Superconducting Quasiparticle Hetrodyne Mixers;" W. R. McGrath, Applied Physics Letters 39(8); Oct. 15, 1981, pp. 655-658.
"Broad-Band RF Match to a Millimeter-Wave SIS Quasi-Particle Mixer"; W. R. McGrath et al.; IEEE Transactions on Microwave Theory and Techniques, vol. MTT-33, No. 12, Dec. 1985; pp. 1495-1500.
Acta Polytechnica Scandinavica; Electrical Engineering Series, No. 46, 1980; Antt: V. Raisanen: pp. 3-55.
"Negative Resistance and Conversion Gain in SIS Mixers" A. D. Smith et al.; Physica 108B; pp. 1367-1368; 1981.
"Super Conducting Tunnel Detectors In Radio Astronomy"; Thomas G. Phillips et al.; Scientific American, vol. 254, No. 5, May 1986, pp. 96-102.
"Integrated Tuning Elements for SIS Mixers"; A. R. Kerr et al.; 1987 International Superconductivity Electronics Conference.

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