Microwave multiband filter

Details Microwave multiband filter Microwave multiband filter

1987-10-08

1988-08-09

Nussbaum, Marvin L.

Wave transmission lines and networks

Coupling networks

Wave filters including long line elements

333103, 333134, 333205, H01P 1213, H01P 1203

Patent

active

047630892

ABSTRACT:
A multiband microwave filter that can selectively transmit a broadband signal or any discret or combination of predefined frequency bands. The filter has two transmission lines, with an output port at one end of a first one of the transmission lines. A switch selectively transmits an input signal to one of the transmission lines. The filter also has a plurality of narrowband directional filters, each of which is used to transmit signals in a corresonding frequency band from one of the transmission lines to the other. Each directional filter includes at least one diode for enabling and disabling the operation of the direction filter in accordance with a bias voltage applied to the diodes. By controlling the switch and applying appropriate bias voltages to each of the diodes, the microwave filter can selectively transmit a broadband signal or any discret or combination of the frequency bands transmitted by the directional filters.

REFERENCES:
patent: 3503014 (1970-03-01), Hall et al.
patent: 4349799 (1982-09-01), Blocksome et al.
patent: 4584543 (1986-04-01), Taylor, Jr. et al.

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