Telecommunications – Transmitter and receiver at same station – Radiotelephone equipment detail
Reexamination Certificate
2011-03-29
2011-03-29
Nguyen, Tuan H (Department: 2618)
Telecommunications
Transmitter and receiver at same station
Radiotelephone equipment detail
C455S550100, C455S553100
Reexamination Certificate
active
07917170
ABSTRACT:
A multi-band wireless communication device includes a plurality of transmit paths outputting signals to one or more antennas and one or more power amplifiers coupled to the transmit paths. Each of the transmit paths is configured to transmit signals on a specific radio frequency (RF) band. The RF bands can include the Advanced Wireless Services (AWS) band and the Personal Communication Service (PCS) band. Passive filters, such as SAW, BAW or FBAR devices, having out-off-band low return losses are included in the transmit paths. The passive filter and phase shifters on each transmit path can be configured so that RF switching between transmit paths is not necessary and a single power amplifier can be used for the different RF bands. Significant cost, power and space savings can be achieved by reducing the need for RF switches and using a single power amplifier to amplify plural RF bands.
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Kyocera Corporation
Nguyen Tuan H
LandOfFree
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