An Advanced Traveling Wave Matching Network for DC-12GHz Variable Gain Amplifier Design

Abstract:

A traveling wave matching (TWM) network is proposed for broadband variable gain amplifier design. The TWM network lessens input return loss and noise figure dependence on VGA’s gain, which is adjusted by biasing of the gain control circuit. A wide band (DC to 12 GHz) VGA with the novel TWM network as input matching is implemented in 2μm InGaP/GaAs HBT (fT of 29.5GHz) technology with die size of 1×2 mm2. As gain control voltage sweeps, the VGA shows a gain tuned from -15 dB to 15 dB and an average noise figure ranging from 8dB to 6.5dB, while S11 (lower than -20dB) and S22 (lower than -10dB) almost unchanged over the operation frequency band.

• Periodical: Applied Mechanics and Materials (Volumes 321-324)
• Pages: 331-335
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.321-324.331
• Online since: June 2013
• Authors: Shan Wen Hu, Tao Chen, Huai Gao, Long Xing Shi, G.P. Li
• Keywords: Broadband Amplifier, Broadband Match, Noise Figure (NF), Return Loss, Traveling Wave Matching, Variable Gain

References

[1] Jianhong Xiao, Iuri Mehr, Jose Silva-Martinez, "A High Dynamic Range CMOS Variable Gain Amplifier for Mobile DTV Tuner," IEEE Journal of Solid-State Circuits, vol. 42, no. 2, pp.292-301, 2007.

DOI: 10.1109/jssc.2006.889386

[2] Ping Chen, Ze-Yu Liao, Che-Chung Kuo, and Huei Wang, "A Variable Gain Distributed Amplifier with Low Voltage and Low Power in 0.18-μm CMOS Technology," Proceedings of the 41st European Microwave Conference, pp.1134-1137, 2011.

[3] Kobayashi, Member, A. K. Oki, "A DC-10 GHz High Gain-Low Noise GaAs HBT Direct-Coupled Amplifier," IEEE Microwave and Guided Wave Letters, vol. 5, no. 9, pp.308-310, 1995.

DOI: 10.1109/75.410407

[4] Shaikh K. Alam, Joanne Degroat, "A 2GHz Variable Gain Low Noise Amplifier in 0.18- μm CMOS," 48th Midwest Symposium on Circuits and Systems, pp.623-626, 2005.

DOI: 10.1109/mwscas.2005.1594178

[5] K. W. Kobayashi, R. Esfandiari, D. K. Umemoto, A. K. Oki, L. T. Tran, D. C. Streit, "HBT Low Power Consumption 2-4.5GHz Variable Gain Feedback Amplifier," 14th GaAs IC symposium, pp.309-312, 1992.

DOI: 10.1109/gaas.1992.247280

[6] Yang Kai, Wang Chunhua, Dai Puxing, "A New CMOS Continuous Variable Gain LNA for 3–10GHz UWB Wireless Receivers," Frequenz. Volume 62, Issue 11-12, p.293–296, 2008.

DOI: 10.1515/freq.2008.62.11-12.293

[7] Behzad Razavi, Turgut Aytur, Christopher Lam, et al., "Multiband UWB Transceivers," IEEE 2005 custom integrated circuits conference, pp.141-148, 2005.

DOI: 10.1109/cicc.2005.1568628

[8] First Report and Order, Federal Communications Commission Std. FCC 02-48, Feb. 2002.

[9] H. Gao, A. Chatchaikarn, L. W. Yang and G. P. Li, "A new traveling wave matching structure for enhancing the bandwidth of MMIC broadband amplifiers," IEEE Microwave and Wireless Components Letters, vol. 15, no.8, p.508–509, 2005.

DOI: 10.1109/lmwc.2005.852783