A linear, high efficiency, HBT CDMA power amplifier. (heterojunction bipolar transistor; code-division multiple access)

From: Microwave Journal | Date: January 1, 1997 | Copyright information

As code-division multiple access (CDMA) systems begin to see implementation in the US and other countries, many manufacturers are rolling out their CDMA cellular handsets. The final power amplifier for these handsets is critical to the competitive positioning of the product. This power amplifier must operate at full power with the CDMA waveform without generating adjacent-channel interference, operate in analog Advanced Mobile Phone Service (AMPS) or Extended Total Access Communicati...

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