Wave transmission lines and networks – Coupling networks – Wave filters including long line elements
Reexamination Certificate
2005-12-20
2005-12-20
Ham, Seungsook (Department: 2817)
Wave transmission lines and networks
Coupling networks
Wave filters including long line elements
C333S212000
Reexamination Certificate
active
06977566
ABSTRACT:
Provided are a filter and a method of arranging resonators, which enable forming an attenuation pole and thus achieving excellent frequency characteristics. The filter includes a plurality of resonators. An electromagnetic wave enters through an input end into one of the resonators and exits through an output end from another resonator. The resonators are arranged so that two propagation paths are formed between the input end of one resonator and the output end of another resonator. Forming a plurality of propagation paths allows producing the attenuation pole.
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Ham Seungsook
Oliff & Berridg,e PLC
TDK Corporation
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