Microwave Engineering Europe - January/February 2008 - (Page 36)

36 DSP AND OFDM to wirelessly transmit and receive data. While CMOS provides excellent DSP functionality, it has difﬁculty in bridging the gap to the antenna. GaAs ampliﬁers or modules have a proven record to ﬁll this gap. For transmit, GaAs circuits can provide power efﬁcient solutions for high PAR. On the receive side, GaAs provides the dynamic range and resistance to saturation. Additionally, if integration of transmit and receive with multiple functions is desired, careful design of ASICs can provide a very cost-effective, high-performance solution for OFDM system requirements. Addressing the gap in OFDM systems will help to ensure high quality when transmitting wireless data. References [1] Y.Aoki,, S. Kuroda, “High Gain-Density K-Band P-HEMT LNA MMIC for LMDS and Satellite Communication,” IEEE MTT-S Digest, pp. 17-20, 2000. [2] S.Kumar, M.Vice, H.Morkner, W.Lam, “Enhancement mode GaAs PHEMT LNA with linearity Control(IP3) and Phase matched Mitigated Bypass Switch with Differential Active Mixer,” IEEE 2003 International Microwave Symposium, [3] H.Morkner, M.Frank, S.Yajima, “A 1.7mA Low Noise Ampliﬁer with Integrated Bypass Switch for Wireless 0.05-6 GHz Portable Applications,” IEEE Microwave and Millimeterwave Monolithic Circuits Symposium, Session TU4A, June 2001. [4] H.Morkner, R.Ruby, M.Frank, D.Figueredo, “An Integrated FBAR and PHEMT Switched-AMP for Wireless Applications”, IEEE MTT-S Symposium, June 1999, Session TH1A-1. [5] H.Morkner, M.Frank, S.Yajima, “A Miniature PHEMT Switched-LNA for 800MHz to 8 GHz Handset Applications”, IEEE 1999 Radio Frequency Circuits Symposium, June 1999, Session TUE1-2 [6] Ray Moroney et.al., “A High Performance Switch-LNA IC for CDMA Handset Receiver Applications “, IEEE Figure 9: A ePHEMT ASIC MMIC for WiFi 802.11abgn applications. 1998 Radio Frequency Integrated Circuits Symposium, June 1995, pp 43-45. [7] Patent:H. Morkner, M. Frank, “A Amplifer/Switch toplogy for Mircrowave Applications”, 8 Claims, Filed at U.S. Patent Ofﬁce, Nov 1998 [8] Henrik Morkner, Mike Frank, Kevin Negus, Tson-Ming Kao, “ A Novel Integrated Microwave Bias Network For Low Cost Multistage Ampliﬁers”, 1997 IEEE MTT-S International Microwave Symposium, Session TU1A-3, June 1997 [9] H. Morkner, “Miniature 3V GaAs LNA, VGA, and PA for Low Cost .5-4 Ghz Wireless Applications”, 1997 Wireless Symposium, Feb. 1997,pp.190- 195. [10] H. Morkner, M. Frank, D. Millicker, “A High Performance 1.5 dB Low Noise PHEMT MMIC Ampliﬁer for low cost 1.5 - 8 GHz Commercial Applications”, 1993 Microwave and Millimeter-Wave Monolithic Circuits Symposium, pp 13 - 16. [11] H. Morkner, M. Frank, R. Kishimura, “A Novel MMIC PHEMT Low Noise Ampliﬁer for GPS Applications”, 1992 Microwave and Millimeter-Wave Monolithic Circuits Symposium, pp 13-16. [12] P.M. Smith, P.C. Chao, K. Duh, L.F. Lester, B.R.Lee, and J.M. Ballingall, “Advances in HEMT Technology and Applications”, 1987 IEEE MTT-S International Symposium, p. 749. [13] M. Frank, “The Current Source as a Microwave Biasing Element”, US Patent # 4,912,430. [14] M. Frank, “The 2 to 6 GHz Block GaAs MMIC Ampliﬁer”, Microwave Journal, Aug. 1990, pp 83-92. [15] S. A. Maas, “GaAs MESFET mixer with very low inter-modulation,” IEEE Trans. Microwave Theory and Technique, vol. MTT-35, pp. 425-429, 1987 [16] S. A. Maas, Microwave Mixers (Second Edition), Artech House, pp. 338-340, 1993 [17] K. Fujii, F.M. Gannouchi, T. Yakabe, H. Yabe, “A comprehensive nonlinear GaAs FET model suitable for active and passive circuits design,” IEICE Trans, on electron, Vol. E84-C, no. 7, pp. 881-890, July 2001 Figure 10: A WiFi FEM for a complete DSP CMOS to Antenna solution. Company Information Avago Technologies www.avagotech.com Microwave Engineering Europe ● January/February 2008 ● www.mwee.com 032-033-034-035-036_MWEE.indd 36 25/01/08 13:41:21 http://www.avagotech.com http://www.mwee.com

Table of Contents Feed for the Digital Edition of Microwave Engineering Europe - January/February 2008

Microwave Engineering Europe - January/February 2008 Contents News Comment Radio: Raising the Bar for the Radio: Making 802.11n Work Cover Feature: The RF-System-In-Package Trend - Efficient Design with Advanced Design System 2008 Wireless Sensor Networks: The Zigbee PRO Feature Set: More of a Good Thing Very Fast Measurements of Wireless Devices with Small Antennas in Reverberation Chambers WiMAX Update 2008 Bridging the Gap from the CMOS DSP to the Antenna in OFDM Systems Products Calendar

Microwave Engineering Europe - January/February 2008

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