Plural channel superconducting filter circuit having release...

Superconductor technology: apparatus – material – process – High temperature devices – systems – apparatus – com- ponents,... – High frequency waveguides – resonators – electrical networks,...

Reexamination Certificate

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C333S0990MP, C333S202000

Reexamination Certificate

active

07945300

ABSTRACT:
There is provided a signal processing method comprising: inputting an input signal having a certain band; dividing said input signal into a signal in a stop band and a signal in a pass band outside said stop band with a use of a band stop filter which has a center frequency of said input signal inside said stop band and includes a first resonator having said center frequency as a resonance frequency; extracting a signal in a desired band from the signal in said pass band with a use of a plurality of second resonators; decomposing the signal in said stop band into signals whose degeneracy of said resonance frequency are released; combining a degeneracy-released signals and the signal in said desired band to obtain a combined signal; and outputting the combined signal.

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Mitsuru Honjoh, et al., “Synthesis of Microwave Circuits by Normal Mode Expansion-Synthesis of Rectangular Waveguide Filter With dielectric Sheet Window”, Technical Report of IEICE, MW 82-54, 1982, pp. 9-16.
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, 1998, pp. 73-80 (with English Abstract).
Masamitsu Nakajima, “Microwave Engineering—Basic Principles-,”, Morikita Publishing Co., Ltd., Apr. 15, 1975, p. 55 and 1 additional page.

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