Telecommunications – Receiver or analog modulated signal frequency converter – Frequency modifying or conversion
Patent
1983-08-08
1985-09-17
Bookbinder, Marc E.
Telecommunications
Receiver or analog modulated signal frequency converter
Frequency modifying or conversion
455328, H04B 126
Patent
active
045425353
ABSTRACT:
An R.F. balanced mixer comprises on an insulating substrate (3) with opposed major surfaces a balanced first transmission line having a pair of conductors (18, 19) on a first major surface and an unbalanced second transmission line having a strip conductor (15) on one major surface and a ground conductor (13) on the side of the substrate (3) remote from the strip conductor (15). Two diodes (24, 25) are electrically connected between the pair of conductors (18, 19) of the first line and the strip conductor (15) of the second line to form an arrangement operable as a 180.degree. hybrid junction, the first line coupling an R.F. signal to the diodes (24, 25) and the second line coupling an L.O. signal to and an I.F. signal from the diodes (24, 25). To reduce the impedance of the I.F. signal ground return path and inhibit resonant effects, the pair of conductors (18, 19) of the first line to which the diodes (24, 25) are respectively connected are on the same major surface as the strip conductor (15) of the second line and are coupled to the ground conductor (13) of the second line by means which include conductive connections (e.g. 33, 34) through the substrate (3) and which present a low impedance to the L.O. and I.F. signals.
REFERENCES:
patent: 4032849 (1977-06-01), Gysel et al.
patent: 4291415 (1981-09-01), Buntschuh
patent: 4406020 (1983-09-01), Reindel
"4 and 5 mm. Band Printed Circuit Balanced Mixers"--P. Weier--Aug. 1979 Microwave Journal, pp. 66-68.
"W--Band Broadband Integrated Circuit Mixers"--Tahim et al.--May 27, 1982 Electronics Letters, vol. 18, No. 11, pp. 471-473.
"A novel Broadband Double Balanced Mixer for the 18-40 GHz Range--A. Blaisdell et al., 1982 IEEE MTT-S Digest, pp. 33-35.
Ballard Philip M.
Bates Robert N.
Bookbinder Marc E.
Kraus Robert J.
U.S. Philips Corporation
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