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In this paper, class F power amplifier covering a wide dynamic range with a steady gain for non-constant envelope signal used in CDMA systems is designed and studied. The design principle is attempted to operate at high values of peak to average power ratio likely to be up to PAPR = 10dB in such systems. The design also takes care of improving the adjacent channels interference ratio (ACPR) of such...
This article presents the design approach, realization and measurement results of a highly efficient double octave wideband power amplifier using a GaN-HEMT bare-die. An iterative approach to obtain the optimum source and load impedances is described. Multiple harmonics are analyzed using harmonic load-pull simulation and a reliable large-signal device model. The design was realized exploiting a transition...
In this paper we present a novel wide bandwidth inverse class F power amplifier utilizing a broadside coupled Marchand balun to achieve optimal matching up to the third harmonic. This technique simultaneously provides improvement to power amplifier efficiency, saturation power, and linearity. A prototype power amplifier (PA) was constructed to verify this concept and its feasibility. The prototype...
A high-efficiency power amplifier using novel harmonic control circuit is realised with lateral depletion MOSFET. The proposed harmonic control circuit that is used to design input/output matching network has short impedance for second- and third-harmonics, and is superior to the class-F or inverse class-F harmonic control circuit. It is also shown that the maximum power-added efficiency of the proposed...
In this paper, a design method of harmonic output impedance control for high efficient power amplifiers is proposed. The high efficiency of the power amplifier is achieved by using control of the second and third harmonic output impedances at optimized fixed fundamental output impedance. The 1 GHz measured results of the harmonically tuned power amplifier yielded 78 % power added efficiency at the...
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