Band switchable filter

Details Band switchable filter Band switchable filter

2005-06-21

2005-06-21

Takaoka, Dean (Department: 2817)

Wave transmission lines and networks

Resonators

Magnetic type

C333S174000, C333S205000

Reexamination Certificate

active

06909344

ABSTRACT:
A ferro-electric filter and method of tuning same. The filter includes a switch for switching between quarter wave resonator and half wave resonator modes. The filter also includes a ferro-electric component for tuning the resonant frequency. The method includes applying a switching control signal to the switch for switching between resonant frequencies and applying a tuning control signal for tuning the resonant frequency.

REFERENCES:
patent: 5227748 (1993-07-01), Sroka
patent: 6018282 (2000-01-01), Tsuda
patent: 6404304 (2002-06-01), Kwon et al.
patent: 6522220 (2003-02-01), Yamada et al.

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