Wednesday, August 1, 2007

Understanding The Performance Of RF Amplifiers Used In Base Station Applications

n order to properly configure a base station transceiver, designers must understand the performance parameters of the RF amplifiers being used. This not only includes the standard parameters such as gain, noise figure, P1dB, and IP3, but also includes more subtle parameters, including spectral re-growth and power efficiency. The performance of various types of amplifiers will be analyzed in this article to illustrate the advantages and tradeoffs of each type. Also, performance will be analyzed under various bias conditions to understand the tradeoffs between ACPR/ACLR (adjacent channel power) and power efficiency. The article will compare various types of RF amplifiers including GaAs MESFET, InGaP HBT, and GaAs HFET amplifiers. Article

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