Multiplex communications – Diplex
Reexamination Certificate
2005-01-04
2009-10-20
Duong, Frank (Department: 2416)
Multiplex communications
Diplex
Reexamination Certificate
active
07606184
ABSTRACT:
A multiplexer, such as a diplexer, is delineated. The multiplexer may be employed in a communications system that may communicate in multiple frequency bands within a predefined range of frequencies, e.g., 2400 MHz-4900 MHz. The communications system may operate in a network, such as a wireless local area network, without significant interference from signals used by a cellular/mobile telephone system. The multiplexer may include multiple channels with bandpass filters that may be formed with lumped inductors and lumped capacitors. In at least one of the channels, the bandpass filter may be formed by combining at least one lowpass filter with at least one highpass filter.
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Ko et al, A Miniaturized LTCC Multi-layered Front-end Module for Dual Band WLAN (802.11a/b/g) Applications, IEEE, vol. 2, pp. 563-566, Jun. 2004.
Kommrusch Richard
Liu Kai
Duong Frank
Moss Allen J.
Squire, Sanders & Demspey L.L.P.
Starkovich Alex
TDK Corporation
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