A dual-band RF transceiver for multistandard WLAN applications

A new dual-band RF transceiver is presented for 2.4- and 5.2-GHz multistandard wireless local area networks. The proposed dual-band RF transceiver integrates a concurrent dual-band front-end, a triple-band frequency synthesizer, and a band-sharing in-phase/quadrature modulator/demodulator to maximiz...

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Bibliographic Details
Published in:IEEE transactions on microwave theory and techniques 2005-03, Vol.53 (3), p.1048-1055
Main Authors: Chang, S.-F.R., Wen-Lin Chen, Shuen-Chien Chang, Chi-Kang Tu, Chang-Lin Wei, Chih-Hung Chien, Cheng-Hua Tsai, Chen, J., Chen, A.
Format: Article
Language:English
Subjects:
Concurrent
Demodulation
Dual band
frequency synthesizer
Frequency synthesizers
Integrated circuit measurements
Integrated circuit synthesis
link budget
Local area networks
Noise measurement
orthogonal frequency-division multiplexing (OFDM)
Phase measurement
power amplifier
Radio frequency
RF transceiver
Transceivers
Wireless LAN
Wireless networks
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Summary:A new dual-band RF transceiver is presented for 2.4- and 5.2-GHz multistandard wireless local area networks. The proposed dual-band RF transceiver integrates a concurrent dual-band front-end, a triple-band frequency synthesizer, and a band-sharing in-phase/quadrature modulator/demodulator to maximize component and power reuse. The design is started with the examination of an enhanced dual-band heterodyne architecture and then the optimal circuit partition to satisfy the multistandard requirements. Key dual-band circuits are designed and integrated with other building blocks for experimental demonstration. The measurement shows that eight 5-GHz channels and 13 2.4-GHz channels can be synthesized within 130 /spl mu/s with phase noise less than -98 dBc/Hz at 100-kHz off carrier and spur suppression greater than -65 dBc. The transmitted P/sub 1 dB/ power is 25/20 dBm at 2.4/5.2 GHz, respectively, with the modulation accuracy error-vector magnitude (EVM) values varying from 3.57% to 7.19%. The receiver gain is 20/31 dB at 2.4/5.2 GHz front-end and 70 dB at IF back-end with EVM within 2.32% to 10% from -70- to -17-dBm received power range.
ISSN:0018-9480
1557-9670
DOI:10.1109/TMTT.2005.843509