Image suppression harmonic frequency converter operating in the

Details Image suppression harmonic frequency converter operating in the Image suppression harmonic frequency converter operating in the

1988-12-22

1991-05-28

Eisenzopf, Reinhard J.

Telecommunications

Receiver or analog modulated signal frequency converter

Noise or interference elimination

455306, 455317, 455319, 455327, 333116, A04B 110

Patent

active

050201484

ABSTRACT:
An image suppression harmonic frequency converter capable of operating in any microwave range is described. Frequency conversion is obtained by making use of a local frequency which is half that of a conventional converter. In particular, the radiofrequency reception signal is converted into an intermediate frequency signal with suppression of the converted image band. Similarly, the intermediate frequency signal to be transmitted is converted into a single side band radiofrequency transmission signal. The converter comprises two harmonic mixers, a first inquadrature radiofrequency hybrid coupler, a second in-quadrature intermediate frequency hybrid coupler, two appropriate duplexer filters, two low-pass filters, two matching circuits, and two decoupling circuits.

REFERENCES:
patent: 3634768 (1972-01-01), Carpenter et al.
patent: 3652940 (1972-03-01), Reiter et al.
patent: 4118670 (1978-10-01), Dickens
patent: 4457022 (1984-06-01), Dydyk
patent: 4492960 (1985-01-01), Hislop
patent: 4817201 (1989-03-01), Bonato
Microwave Journal, vol. 25, No. 6, Jun. 1982, "Millimeter--Wave to Microwave Converter".

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