Wave transmission lines and networks – Coupling networks – Nonreciprocal gyromagnetic type
Patent
1988-01-19
1989-03-28
LaRoche, Eugene R.
Wave transmission lines and networks
Coupling networks
Nonreciprocal gyromagnetic type
333 25, 336183, 336188, 336200, 336232, H03H 742
Patent
active
048167843
ABSTRACT:
A monolithic transformer comprises two windings arranged in a plane with conductors of the windings interleaved with and crossing one another, whereby each winding is symmetrical with respect to a center point of the winding, to which a center tap connection can be made. The conductors of the windings and crossings therebetween can be arranged so that adjacent conductors belong to the different windings for maximum coupling. An unbalanced circuit can be connected between the center tap and one end of a winding, the other end electrically floating, to compensate for the effects of the unbalanced circuit on interwinding capacitance. The transformer can be constructed using air bridge technology with conductors supported by and spaced from a surface of a substrate.
REFERENCES:
patent: 3181096 (1965-04-01), Raub
patent: 3305814 (1967-02-01), Moyer
patent: 3904991 (1975-09-01), Ishii et al.
patent: 4080585 (1978-03-01), Molthen
patent: 4538132 (1985-08-01), Hiyama et al.
"Computer Simulation and Experimental Investigation of Square Spiral Transformers for MMIC Applications", by L. Wiemer et al., IEE Colloquim on Computer Aided Design of Microwave Circuits, Digest #99, Nov. 11, 1985, pp. 2/1 to 2/5.
Haley R. John
LaRoche Eugene R.
Lee Benny
Northern Telecom Limited
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