標題: Dual-band adjustable and reactive I/Q generator with constant resistance for down- and up-converters
作者: Tseng, Sheng-Che
Meng, Chinchun
Lee, Yueh-Ting
電信工程研究所
Institute of Communications Engineering
關鍵字: down-converter;dual band;in-phase/quadrature (I/Q);SiGeBiCMOS;single sideband (SSB);SSB rejection ratio;up-converter
公開日期: 1-Aug-2008
摘要: Adjustable and reactive in-phase/quadrature (I/Q) generators with constant resistance are proposed for the first time in this paper with the properties of low loss, dual-band implementation, and high quadrature accuracy. The quadrature phase property and input matching of the I/Q generator can be achieved at all frequencies simultaneously by the constant-resistance I/Q generator. However, the magnitude balance of the dual-band T/Q generator is achieved at two designed frequencies. A 2.4/5.2-GHz I/Q down-converter and a 2.4/5.7-GHz single-sideband up-converter are fabricated using 0.35-mu m SiGe BiCMOS technology. The dual-band I/Q generator along with two single-to-differential amplifiers is integrated to provide differential quadrature local oscillator signals for dual-band mixers. The magnitude imbalance and phase error between the I and Q channels of the down-converter are < 1% and < 1 degrees, respectively, while the maximum sideband rejection ratio of the up-converter is up to 50 dB. Additionally, the operation bandwidth (sideband rejection ratio > 30 dB) is 200 MHz at 2.4 GHz and 720 MHz at 5.7 GHz.
URI: http://dx.doi.org/10.1109/TMTT.2008.926526
http://hdl.handle.net/11536/8492
ISSN: 0018-9480
DOI: 10.1109/TMTT.2008.926526
期刊: IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES
Volume: 56
Issue: 8
起始頁: 1861
結束頁: 1868
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