Filter circuit

Details Filter circuit Filter circuit

2007-11-13

2007-11-13

Ham, Seungsook (Department: 2817)

Wave transmission lines and networks

Coupling networks

Wave filters including long line elements

C333S126000, C333S204000

Reexamination Certificate

active

11167172

ABSTRACT:
A filter circuit includes a plurality of resonators connected in parallel and each having loaded Q deviation equal to allowable deviation of a group delay, a divider to divide an input signal to the resonators, a combiner to combine output signals of the resonators, and an opposite phase unit for making signals passing two resonators of the resonators an approximately opposite phase in an output of the combiner, the two resonators having resonance frequencies adjacent to each other, respectively.

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Takayuki Kato, et al., “Studies on the Equivalent Circuits of Dual-Mode Rectangular Waveguide Filters Using HFSS and MDS”, Technical Report of IEICE, MW 98-85, Sep. 1998, pp. 73-80.
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