Wave transmission lines and networks – Plural channel systems – Having branched circuits
Reexamination Certificate
2005-03-22
2005-03-22
Summons, Barbara (Department: 2817)
Wave transmission lines and networks
Plural channel systems
Having branched circuits
C333S127000, C333S187000, C333S193000, C333S206000
Reexamination Certificate
active
06870441
ABSTRACT:
The invention concerns a method for optimizing elements of a narrow or intermediate band bandpass filter whereof the LC prototype has been determined. The invention is characterized in that it comprises steps which consist in: (i) breaking down several parallel or series capacitors of resonators with X elements, (ii) inserting pairs of transformers between the first and second separated element and the rest of the resonator, (iii) displacing the residual transformers to modify the impedance levels of the resonators, and (iv) absorbing the residual transformers by transformation. The invention also concerns the resulting filters.
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Detaint Jacques
Veyres Camille
Blakley Sokoloff Taylor & Zafman
France Telecom
Summons Barbara
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