Broadband microwave bias network

Details Broadband microwave bias network Broadband microwave bias network

1975-09-08

1976-09-14

Gensler, Paul L.

Wave transmission lines and networks

Automatically controlled systems

With control of equalizer and/or delay network

333 73R, 333 97R, H03H 704

Patent

active

039809757

ABSTRACT:
For supplying a bias (modulation) signal, either AC or DC, to a microwave circuit, a network consisting of a low pass filter is provided which presents a high isolating impedance to an extremely wide bandwidth of microwave frequencies, while allowing low frequency bias or modulating signals to be supplied to the microwave circuit without significant attenuation. The network consists of two helical inductors, one within the other, plus a bypass capacitor. The inner small inductor presents a high, non-resonant impedance to high microwave frequencies and the outer, larger inductor presents a high impedance to lower microwave frequencies. The bypass capacitor cooperates with the outer inductor to complete the filter circuit for the lower microwave frequencies. The smaller inductor's proximity to and within the larger inductor provides a distributed shunt capacitance to ground so as to terminate the filter for the higher microwave frequencies at the smaller inductor.

REFERENCES:
patent: 3090016 (1963-05-01), Mayer
patent: 3521202 (1970-07-01), Russell
patent: 3812438 (1974-05-01), Hopfer

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