Multi-mode filter

Details Multi-mode filter Multi-mode filter

2006-01-03

2006-01-03

Ham, Seungsook (Department: 2817)

Wave transmission lines and networks

Coupling networks

Frequency domain filters utilizing only lumped parameters

C333S175000

Reexamination Certificate

active

06982614

ABSTRACT:
The invention provides a filter network comprising a plurality of circuit branches, each circuit branch comprising one or more filter elements. At least one of the circuit branches comprises a resonant circuit and is preferably arranged between the circuit path and ground. The filter network further comprises a switch device associated with the resonant circuit, the switch device being operable between an on state, in which the resonant circuit is connected to said circuit path, and an off state in which the resonant circuit is substantially isolated from said circuit path. The filter network also includes a switch control input for receiving a signal for operating the switch device between the on and off states. Switching in and out the resonant circuit changes the operational characteristics of the filter.

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patent: 5065120 (1991-11-01), Munn
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patent: 19 09 244 (1970-05-01), None
patent: 0 818 888 (1998-01-01), None
James J. Komiak et al., “High Efficiency Wideband 6 to 18 GHz PHEMT Power Amplifier MMIC”, 2002 IEEE, pp. 905-908.

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