H - Electricity – 04 – B
Patent
H - Electricity
04
B
H04B 17/00 (2006.01) H04Q 7/22 (2006.01) H04Q 7/36 (2006.01)
Patent
CA 2253487
A wireless base station has a transmitter and receiver. Transmission signals are applied to an antenna through a transmit bandpass filter that is tuned for a transmit band of frequencies. Received signals from the antenna are applied to the receiver through a receive bandpass filter that is tuned for a receive band of frequencies An RF switching array consisting of four RF switches interconnects the output of the transmitter and the input of the receiver such that normal, loopback (self-test), and scanning modes can be performed. In the normal mode, the antenna is connected to the transmitter and receiver through the transmit and receive bandpass filters, respectively. The transmit and signal paths are effectively isolated from each other by three serially-connected open switches. In the loopback mode, the transmitter output is connected to the receiver input. In the scanning mode, the antenna is connected to the receiver through the transmit bandpass filter. The same set of interconnects provides for loopback and normal operation as well as the new scanning operation. The use of switches rather than couplers or couplers for the loopback function reduces noise and crosstalk between transmit and receive signal lines and lower losses in these lines.
Rucki John Stanley
Wen Jack Chi-Chieh
Zappala Christopher F.
Kirby Eades Gale Baker
Lucent Technologies Inc.
LandOfFree
Transceiver with rf loopback and downlink frequency scanning does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Transceiver with rf loopback and downlink frequency scanning, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Transceiver with rf loopback and downlink frequency scanning will most certainly appreciate the feedback.
Profile ID: LFCA-PAI-O-1470267