A linearization technique for improving the class-E power amplifier (PA)'s adjacent channel power ratio (ACPR) is proposed. The design is simulated in a 2-mu m InGaP/GaAs heterojunction bipolar transistor process. The integration of a passive predistorter at the input of the PA linearizes the proposed architecture. At a 29-dBm output power, the PA's ACPR is indicated to be -51 dBc, meeting the stringent code division multiple access regulation. At this exact output power, the simulated power added efficiency is 55 % with the collector voltage headroom consumption of 3.4 V. The input return loss, S11, of the PA is simulated as -12.5 dB. With an active finger print dimension of 1000 mu m \times 750 mu m, the proposed PA is well suited for the application of mobile wireless communication.
ESWARAN, UTHIRAJOO; RAMIAH, HARIKRISHNAN; KANESAN, JEEVAN; and REZA, AHMED WASIF
"Class-E GaAs HBT power amplifier with passive linearization scheme for mobile wireless communications,"
Turkish Journal of Electrical Engineering and Computer Sciences: Vol. 22:
5, Article 8.
Available at: https://journals.tubitak.gov.tr/elektrik/vol22/iss5/8