Multiplexer

Details Multiplexer Multiplexer

2007-03-13

2007-03-13

Urban, Edward F. (Department: 2618)

Telecommunications

Transmitter and receiver at same station

Radiotelephone equipment detail

C455S082000, C333S133000, C333S193000

Reexamination Certificate

active

10718798

ABSTRACT:
A small-sized low-cost multiplexer with a low insertion loss includes a first filter defining a lowpass filter that passes a signal in a first frequency band and attenuates a signal in second and third frequency bands, a second filter including a SAW filter and defining a bandpass filter that passes a signal in the second frequency band and attenuates a signal in the first and third frequency bands, and a third filter defining a highpass filter that passes a signal in the third frequency band and attenuates a signal in the first and second frequency bands. One of two ports of each of the first, second, and third filters are connected in common with a common port.

REFERENCES:
patent: 6175631 (2001-01-01), Davis et al.
patent: 6185434 (2001-02-01), Hagstrom et al.
patent: 6584304 (2003-06-01), Thomsen et al.
patent: 6628178 (2003-09-01), Uchikoba
patent: 6633748 (2003-10-01), Watanabe et al.
patent: 6724278 (2004-04-01), Smith
patent: 2003/0124984 (2003-07-01), Shin et al.
patent: 2000-165288 (2000-06-01), None
patent: 2003-115736 (2003-04-01), None
patent: 2003-198309 (2003-07-01), None
Official Communication dated Dec. 9, 2005, Issued in the corresponding Chinese Patent Application No. 200310122589.4 (with full English translation.).

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