High Frequency Current Mode Class-D Amplifiers With High Output Power and Efficiency By Anthony Lawrence Long A 13 watt Current Mode Class-D (CMCD) with 60% efficiency is presented. This amplifier is the highest power switch mode microwave power amplifier reported to date. The CMCD architecture is an improvement over the Voltage Mode Class-D in that the parasitic reactance in the active device ...

Two high efficiency Ku-band pHEMT power amplifier MMICs are presented in this paper. A single stage, high efficiency amplifier provides a peak power added efficiency of 57.6% with 10.5 dB associated gain and 26.5 dBm output power into a 50Ω load at 14 GHz. Additionally, a dual stage, high gain amplifier provides a peak power added efficiency of 50.4% with 19.7 dB associated gain and 27.5 dBm ou...

This paper analyses an off-nominal Class E ZVS amplifier, with R.F. supply choke and the switch on-duty ratio D = 0.5, to identify conditions for its high-frequency high-efficiency operation. Simple user-friendly analytical expressions essential parameters of amplifier have been derived subsequently validated by simulation experimental results. It has proven that can be optimized outperform nom...

Introduction The need for highly efficient, linear microwave power amplifiers has grown rapidly, especially as mobile and satellite communication systems have been developed and expanded [1]. These systems employ multilevel digital modulation techniques to achieve higher-data-rate and multimedia services. This results in a band-limited multi-carrier signal, which is spectrally efficient but exh...

1 This work was undertaken as the Electronics and Telecommunications Engineering degree Final Project of its two first authors. Abstract The design, implementation and performance tests of an Si LDMOS-Based power amplifier for UHF is presented. The amplifier, conceived for medium power GSM-900 base-station applications, consists of a Class-AB single stage circuit designed for maximum output pow...

The proposed work focuses on the design of a class F power amplifier for 433 MHz which can be used RFID applications. Power requires high efficiency and low dissipation, especially in wireless base stations. In this work, is employed to achieve by wave shaping drain terminal waveforms with suitable harmonic termination networks. At terminal, voltage current waveform shaped into square half sinu...