Wideband Low Noise Amplifier Design for 2.3–2.4 GHz WiMAX Application
This paper describes the design of a low noise amplifier using negative feedback topology for WiMAX 2.3–2.4 GHz base station application. The negative topology employs an enhancement mode feedback inductor and advanced GaAs PHEMT transistor which yields excellent performance on the critical RF parameters such as noise, gain and linearity. By using the negative feedback topology the design is compact and uses fewer components compared to other state-of-art wideband low noise amplifier designs. The low noise amplifier has been designed on a Rogers 4003C substrate PCB and produced a gain of 12 dB, noise less than 0.7 dB and IIP3 greater than 13 dBm. The design is also matched at both input and output for 50 Ω and proven to be unconditionally stable across the frequency range.
KeywordsWiMAX Wideband LNA Negative feedback
The authors would like to thank Universiti Teknologi PETRONAS Malaysia funded under UTP-STIRF internal grant no. 36/2011 for providing financial support towards publication of this work.
- 1.Osman AF, Noh NM (2012) Wideband LNA design for SDR radio using balanced amplifier topology. In: 4th Asia symposium on quality electronic design (ASQED), pp 86–90Google Scholar
- 3.Pozar DM (2001) Microwave and RF design of wireless systems, 3rd edn. Wiley, New JerseyGoogle Scholar
- 4.Mandeep JS, Abdullah H, Nitesh R (2010) A compact, balanced low noise amplifier for WiMAX base station applications. Microwave J 53:84–90Google Scholar
- 5.Henkes DD (1998) LNA design uses series feedback to achieve simultaneous low input VSWR and low noise. RF Des 10:26–32Google Scholar
- 6.Osman AF, Noh NM (2012) Wideband low noise amplifier design for software defined radio at 136–941 MHz. In: 4th international conference on intelligent and advanced system (ICIAS), pp 232–236Google Scholar
- 7.Gonzalez G (1984) Microwave transistor amplifiers analysis and design. Prentice Hall, New Jersey, pp 80–87Google Scholar
- 8.Wei CJ (2011) Capacitance and RF-conductance/transconductance look-up table based pHEMT model. In: Asia Pacific microwave conference proceedings (APMC) pp 1246–1249Google Scholar
- 9.Liao S (2001) Microwave circuit analysis and amplifier design. Prentice-Hall, Englewood CliffsGoogle Scholar
- 10.Avago Technologies Datasheet (2008) ATF-54143 low noise enhancement mode pseudomorphic HEMT in a surface mount plastic package. Avago Technologies, USA, Tech. AV01-0602EN, Aug 5 2008Google Scholar
- 13.Wang ZX, Ming YW, Hong PJ, Xin CJ, Bo XW, Chen S (2008) The design of SiGe HBT balanced broadband low noise amplifier. In: 2008 Beijing microwave and millimeter wave technology digest, pp 233–236Google Scholar
- 16.Blaakmeer SC, Klumperink EAM, Leenaerts DWM, Bram N (2006) A wideband noise canceling CMOS LNA exploiting a transformer. In: IEEE radio frequency integrated circuits symposium digest, 2006, pp 137–140Google Scholar