Bandpass filter within a multilayered low temperature...

Details Bandpass filter within a multilayered low temperature... Bandpass filter within a multilayered low temperature...

2005-08-25

2008-10-28

Ham, Seungsook (Department: 2817)

Wave transmission lines and networks

Coupling networks

Frequency domain filters utilizing only lumped parameters

C333S204000, C333S185000

Reexamination Certificate

active

07443268

ABSTRACT:
A compact bandpass filter within a multilayered low temperature co-fired ceramic (LTCC) substrate is provided. Each resonator comprises an inductor and a capacitor connected in parallel. A top ceramic substrate comprises a top conductive plate to form a first RF ground plane. A bottom ceramic substrate comprises a bottom conductive plate to form a second RF ground plane. A first ceramic substrate is between the top and bottom ceramic substrates. All inductors of the resonators are serpentine conductive traces on the first ceramic substrate. A second ceramic substrate is between the first and bottom ceramic substrates, having a plurality of conductive plates to form a plurality of capacitors that transmit RF signal from an input node of the bandpass filter to an output node of the bandpass filter. The resonators are located between the too and bottom conductive plates.

REFERENCES:
patent: 5357227 (1994-10-01), Tonegawa et al.
patent: 5777533 (1998-07-01), Kato et al.
patent: 6064281 (2000-05-01), Sheen
patent: 6542053 (2003-04-01), Yamaguchi
patent: 6759926 (2004-07-01), Yamaguchi
patent: 7012484 (2006-03-01), Chang et al.

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