yesThis paper describes the characterization and design of \ud energy efficient user terminal transceiver power amplifier. To \ud reduce the design of bulky external circuitry, the load modulation \ud technique is employed. The design core is based on the \ud combination of Class B and Class C that includes quarter \ud wavelength transformer at the output to perform the load \ud modulation. The handset transceiver for this power amplifier is \ud designed to operate over the frequency range of 3.4GHz to \ud 3.6GHz mobile WiMAX band. The performances of the load \ud modulation amplifier are compared with conventional Class B \ud amplifier. The results of 30dBm output power and 53% power \ud added efficiency are achieved
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