Authors : Abdulkareem Mokif Obais and Ali Shaaban Hassooni
Abstract: Due to good characteristics, unconditional stability, wideband signal capability and high cancellation of distortions, compared with other techniques, feed forward linearization technique equipped with additional linearization loop is adopted in this study for linearizing a Class-A RF power amplifier having 5.8 GHz central frequency. In this study, the adaptation of feed forward technique is employed to improve the characteristics of a power amplifier for wireless application purposes. The nonlinear characteristics of commercial products are conditioned using AWR simulation technique to present linearized components for multicarrier transmission applications. In the linearized product, the third-order intermodulation is reduced to less than (-50 dBc) and the cancellation of inter modulation distortion approaches 24 dB. In addition for a carrier frequency of 5.8 GHz, an input signal of a bandwidth of about 125 MHz can be managed with maximum output power exceeding 32 dBm.
Abdulkareem Mokif Obais and Ali Shaaban Hassooni, 2018. Design of an Adaptively Linearized Class-A RF Power Amplifier. Journal of Engineering and Applied Sciences, 13: 6151-6156.