H - Electricity – 01 – P
Patent
H - Electricity
01
P
H01P 1/20 (2006.01) H01P 1/205 (2006.01)
Patent
CA 2089155
A multi-stage ceramic bandstop filter electrically isolates coupling between stages in a monolithic block of ceramic material (21) by including holes (32 and 36) between the resonator stages (30, 34, and 38) that are shorted at both the top and the bottom ends, that are coated with conductive material and that behave as electrical shields between the succeeding resonator stages electrically isolating and reducing signal coupling between stages. Isolation between stages is also provided by impedance inverting lengths of transmission line (50 and 52) that coupled the stages together.
Gowling Lafleur Henderson Llp
Motorola Inc.
LandOfFree
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