Ceramic RF filter and duplexer having improved third...

Details Ceramic RF filter and duplexer having improved third... Ceramic RF filter and duplexer having improved third...

2006-04-04

2009-06-02

Lee, Benny (Department: 2817)

Wave transmission lines and networks

Plural channel systems

Having branched circuits

C333S202000, C333S206000

Reexamination Certificate

active

07541893

ABSTRACT:
A duplexing filter suitable for use in a mobile communication system. The filter has a core of dielectric material with several through holes that define resonators. The core has metallized surfaces except for a portion of the top and bottom surfaces. At least one metallized resonator pad surrounds through holes on the top and bottom surfaces. A metallized serpentine region extends from the resonator pad on the bottom surface toward a side surface of the core. The metallized serpentine region causes attenuation of a third harmonic frequency.

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