Antenna sharing device

Details Antenna sharing device Antenna sharing device

2006-04-20

2010-06-08

Summons, Barbara (Department: 2817)

Wave transmission lines and networks

Plural channel systems

Having branched circuits

C333S194000

Reexamination Certificate

active

07733196

ABSTRACT:
An antenna duplexer includes a piezoelectric substrate having a surface, a grounding terminal to be grounded, first and second surface acoustic wave (SAW) filters mounted on the piezoelectric substrate, first and second terminals connected to the first and second SAW filters, respectively, and a line mounted on the surface of the piezoelectric substrate between the first SAW filter and the second SAW filter. A stray coupling path is produced between the first and second terminals. A first end of the line is connected to the grounding terminal. A second end of the line opens and is coupled capacitively to the stray coupling path. The antenna duplexer has a large isolation characteristic between the surface acoustic wave filters.

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International Search Report issued Jul. 11, 2006 in the International (PCT) Application of which the present application is the U.S. National Stage.
Supplementary European Search Report dated Nov. 23, 2009 in counterpart European Application No. 06732141.

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