Directional coupler having interdigital comb electrodes

Details Directional coupler having interdigital comb electrodes Directional coupler having interdigital comb electrodes

1976-01-30

1977-05-31

Gensler, Paul L.

Wave transmission lines and networks

Automatically controlled systems

With control of equalizer and/or delay network

325446, H01P 518

Patent

active

040272540

ABSTRACT:
A directional coupler comprising a dielectric substrate having two opposing faces carrying a sheet electrode on one face and two comb like electrode structures on the other face. Each comb electrode has finger like electrodes projecting from a bus bar towards the other comb. Varying the length of finger electrodes and the amount of overlap varies the amount of signal power coupled between the two combs. Couplers may be arranged to couple up to 100% of signal power. When half signal power is coupled, a 3dB coupler, various microstrip circuits may be built e.g. balanced mixers, power dividers, or power combiners.

REFERENCES:
patent: 3516024 (1970-06-01), Lange
patent: 3593208 (1971-07-01), Smith
patent: 3629733 (1971-12-01), Podell

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