Telecommunications – Transmitter and receiver at same station – Radiotelephone equipment detail
Reexamination Certificate
2005-06-10
2008-10-28
Ferguson, Keith T (Department: 2618)
Telecommunications
Transmitter and receiver at same station
Radiotelephone equipment detail
C455S552100, C455S550100, C455S073000, C455S426100, C455S084000
Reexamination Certificate
active
07444167
ABSTRACT:
The present invention discloses a dual-band RF transceiver. The transceiver comprises a first module, used as the RF front-end of the dual-band transceiver and used for receiving and transmitting a first RF signal and a second RF signal; a second module, electrically connected to the first module, used as the IF IQ modulator/demodulator of the dual-band RF transceiver; a third module, electrically connected to the first and the second modules, used as the tripe-band phase-locked frequency synthesizer of the dual-band RF transceiver and used for providing a first local oscillating signal and a second local oscillating signal to the first module, and a third local oscillating signal to the second module. The dual-band RF transceiver according to the present invention realizes the dual-band triple-mode operation of IEEE802.11 a/b/g by a single dual-band RF module, and therefore the circuit size, power dissipation, component count, and cost can be dramatically reduced.
REFERENCES:
patent: 7251459 (2007-07-01), McFarland et al.
patent: 2001/0041584 (2001-11-01), Watanabe
patent: 2006/0276222 (2006-12-01), Rofougaran
Article entitled “A Dual-Band RF Transceiver for Multi-Standard WLAN Applications” by Sheng-Fuh R. Chang et al. Member IEEE, pp. 1-17, no date available.
Article entitled “Concurrent Multiband Low-Noise Amplifiers—Theory, Design, and Applications” by H. Hashemi et al., Student Member, IEEE, published in IEEE Transactions on Microwave Theory and Techniques, vol. 50, No. 1, Jan. 2002, pp. 288-301, no date available.
Chang Sheng-Fuh
Chen Albert
Chen Hung-Cheng
Chen Wen-Lin
Chien Chin-Hung
Chang Sheng-Fuh
Ferguson Keith T
Integrated System Solution Corp.
Muncy Geissler Olds & Lowe, PLLC
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