Sj. Maeng et al., A GAAS POWER-AMPLIFIER FOR 3.3 V CDMA AMPS DUAL-MODE CELLULAR PHONES/, IEEE transactions on microwave theory and techniques, 43(12), 1995, pp. 2839-2844
For CDMA/AMPS dual-mode cellular phones, a power amplifier operating a
t 3.3 V has been developed for the first time. It consists of linear G
aAs power MESFET's and an output matching circuit which reduces the se
cond and the third harmonics. The amplifier shows an output power of 3
1.5 dBm and a power-added efficiency of 61% for AMPS mode. The third-o
rder intermodulation distortion and the fifth-order one are measured t
o be -32 dBc and -45 dBc at an output power of 26 dBm for CDMA mode.