High frequency filter having a solid circular shape...

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, C333S204000, C333S205000, C333S219000

Reexamination Certificate

active

07970447

ABSTRACT:
A resonance pattern (21) made of conductive material and having a circular plan shape is formed over the principal surface of a dielectric substrate. First and second virtual straight lines mutually crossing at a right angle are defined. A first input port (22) and a first output port (23) are electromagnetically coupled to the resonance pattern at two cross points between the first virtual straight line and an outer circumference line of the resonance pattern. A second input port (24) and a second output port (25) are electromagnetically coupled to the resonance pattern at two cross points between the second virtual straight line and the outer circumference line of the resonance pattern. A first inter-port waveguide (26) propagates a high frequency signal output to the first output port to the second input port.

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Japan Patent Office, Notice of Reasons of Rejection mailed in connection with JP counterpart application 2008-069914 on Mar. 8, 2011; partial English-language translation provided.

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