Switchable tuneable bandpass filter with optimized frequency...

Details Switchable tuneable bandpass filter with optimized frequency... Switchable tuneable bandpass filter with optimized frequency...

2006-09-12

2006-09-12

Ham, Seungsook (Department: 2817)

Wave transmission lines and networks

Coupling networks

Frequency domain filters utilizing only lumped parameters

C333S175000, C455S340000

Reexamination Certificate

active

07106149

ABSTRACT:
In a receiver, provision is made of a tuneable switchable bandpass filter comprising a primary resonant circuit and a first secondary resonant circuit. A second secondary resonant circuit can be switched into a part of the first primary resonant circuit, thereby producing a second primary resonant circuit. By virtue of the embodiment of the primary resonant circuit, the bandpass filter is switchable in terms of frequency range with little outlay on circuitry and, on account of the individual embodiment of a first and second secondary resonant circuit with individual coupling elements, can be optimized with regard to a constant amplitude response.

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German Search Report of Jan. 22, 2003—with English language translation.
European Search Report of Jun. 14, 2004.

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