Results 31 to 40 of about 557,404 (343)
High Power Wideband Class-E Power Amplifier [PDF]
, 2010 This letter shows a high-power, high-efficiency, wideband Class-E RF power amplifier designed upon the load admittance synthesis concept and built using an uncomplicated low-loss load network with a low loss wideband admittance transformer as the main ...
Ortega González, Francisco Javier
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Class-E amplifiers and applications at MF, HF, and VHF [PDF]
2017 IEEE MTT-S International Microwave Symposium (IMS), 2017 Class E amplifiers have been used in a very broad frequency range. This paper expose a general review of the basic application of class E amplifiers for lower frequencies (MF, HF, VHF), including typical components, applications, and results.
Ortega González, Francisco Javier +1 more
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Phase frequency characteristics evaluation for E-class devices output circuits
Физика волновых процессов и радиотехнические системы, 2022 Based on the unitarity of the E-class device circuit [S]-matrix, the phase frequency characteristics are estimated for the output circuit at any harmonic of the fundamental frequency.
Alexander V. Baranov
doaj +1 more source
Multilevel Power Supply for High Efficiency RF Amplifiers [PDF]
, 2009 In radio systems linear power amplifiers (class A, B or AB) are usually used as a solution for the power amplifier stage. These amplifiers have high linearity, but suffer from low efficiency when the transmitted signal has low peak-to-average power ratio.
Alou Cervera, Pedro +5 more
core +1 more source
A Novel High-Power-Factor Single-Switch Electronic Ballast for Compact Fluorescent Lamps
Eletrônica de Potência, 2004 In this paper a high-power-factor electronic ballast for compact fluorescent lamps based on the class E amplifier and featuring low voltage stress across the switch is presented.
Mario Ponce +4 more
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Switching capacities based envelope amplifier for high efficiency RF amplifiers [PDF]
, 2010 Modern transmitters usually have to amplify and transmit signals with simultaneous envelope and phase modulation. Due to this property of the transmitted signal, linear power amplifiers (class A, B or AB) are usually used as a solution for the power ...
Alou Cervera, Pedro +4 more
core +1 more source
Load Mismatch Sensitivity of Class-E Power Amplifiers [PDF]
IEEE Transactions on Microwave Theory and Techniques, 2019 Class-E RF power amplifiers (PAs) are very power efficient under nominal operating conditions. Due to incorporating two tuned tanks, the dependence on the load impedance is, however, relatively large, resulting in, e.g., load-dependent output power, power efficiency, peak voltages, and peak (and average) currents which can lead to reliability issues ...
Ali Ghahremani +2 more
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Envelope amplifier based on switching capacitors for high efficiency RF amplifiers [PDF]
, 2012 Modern transmitters usually have to amplify and transmit signals with simultaneous envelope and phase modulation. Due to this property of the transmitted signal, linear power amplifiers (class A, B, or AB) are usually used as a solution for the power ...
Alou Cervera, Pedro +6 more
core +2 more sources
Class-E Amplifier Design Improvements for GSM Frequencies
The Journal of Engineering Research, 2011 Efficient power amplifiers are essential in portable battery-operated systems such as mobile phones. Also, the power amplifier (PA) is the most power-consuming building block in the transmitter of a portable system.
Z. Nadir, F. Touati
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Design of RF Power Amplifiers Using Parallel-Series Power Combining Transformers [PDF]
Engineering and Technology Journal, 2015 This paper presents the design of a one watt-level RF CMOS Power Amplifier (PA) based on power combining transformers PSCT in 0.13 µm technology using ADS 2011.10.
Suhad. H. Jasim, Ahmed S. Ezzulddin
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