Integrated circuit, image and sum enhanced balanced mixer

Details Integrated circuit, image and sum enhanced balanced mixer Integrated circuit, image and sum enhanced balanced mixer

1974-06-24

1976-02-17

Libman, George H.

H04B 126

Patent

active

039394301

ABSTRACT:
A balanced microwave diode mixing circuit utilizes the junction of a slot transmission line and a coplanar strip transmission line as the point of diode modulation to provide heterodyne mixing. By the use of slot line type elements formed on one side of a dielectric substrate and strip line type elements formed on the other side, the following features are achieved: (A) input of the local oscillator (LO) signal and output of the intermediate frequency (I.F.) signal are achieved through a common coupling to and from the coplanar strip line at the end of the latter which is remote from the hybrid junction; (B) low reactance at the "sum frequency" is presented at the hybrid junction; (C) low reactance at the image frequency is presented at the hybrid junction; and (D) high impedance at the input signal frequency is presented at the hybrid junction.

REFERENCES:
patent: 3479601 (1969-11-01), Mattern
patent: 3571722 (1971-03-01), Vendelin et al.
patent: 3659206 (1972-04-01), Hallford
patent: 3678395 (1972-07-01), Hunton et al.

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