Combiner/divider networks

Details Combiner/divider networks Combiner/divider networks

1991-11-25

1993-02-16

Gensler, Paul

Amplifiers

With plural amplifier channels

Redundant amplifier circuits

330295, 333116, 333117, H03F 368, H01P 518

Patent

active

051874474

ABSTRACT:
A planar interdigitated microstrip coupler comprises a plurality of adjacently disposed transmission lines being spaced such that the transmission lines gradually diverge from a close spacing to a wider spacing. The planar interdigitated microstrip coupler provides equal power split and either 0.degree. or 180.degree. differential phase shift over a multi-octave bandwidth. Further, the interdigitated coupler, when used as a power combiner, provides increased cancellation of second order intermodulation products normally generated by non-linear devices, such as amplifiers, which may be fed to the inputs of the coupler. This increase in second harmonic cancellation, known for distorting signal fidelity, is particularly useful for monolithic circuit applications using amplifiers and mixers.

REFERENCES:
patent: 3390356 (1968-06-01), Ryals et al.
patent: 5025233 (1991-06-01), Leonakis
patent: 5105171 (1992-04-01), Wen et al.

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