Inductor devices – Coil or coil turn supports or spacers – Printed circuit-type coil
Reexamination Certificate
2008-01-22
2008-01-22
Mai, Anh (Department: 2832)
Inductor devices
Coil or coil turn supports or spacers
Printed circuit-type coil
C336S232000, C336S223000, C333S175000
Reexamination Certificate
active
07321284
ABSTRACT:
A bandpass filter includes at least two thin-film layers, a first resonant circuit including a first inductor, and a second resonant circuit including a second inductor. In one embodiment, the first inductor comprises a coil having a counter-clockwise rotation positioned in two or more of the at least two thin-film layers and the second inductor comprises a coil having a clockwise rotation positioned in two or more of the at least two thin-film layer. In this case, the first inductor is coupled to the second inductor in at least one of the at least two thin-film layers when the bandpass filter is energized. In another embodiment, the first inductor has a clockwise rotation and the second has a counter-clockwise rotation positioned. In this case, the first inductor is coupled to the second inductor in at least two of the at least two thin-film layers when the bandpass filter is energized.
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Chen Qiang Richard
Kuwajima Hajime
Mai Anh
Moss Allen J.
Squire Sanders & Dempsey LLP
Starkovich Alex
TDK Corporation
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