Results 11 to 20 of about 5,053,159 (301)

Review of Efficiency CMOS Class AB Power Amplifier Topology in Gigahertz Frequencies [PDF]

open access: yesASM Science Journal, 2022
This paper reviewed the efficiency of CMOS class AB power amplifier topology especially in gigahertz frequencies. CMOS class AB power amplifier is a compromise between class A and class B in terms of linearity and efficiency between 50% to 78.5%. However,
Rohana Sapawi
doaj   +2 more sources

Intermodulation distortion performance enhancement of microwave power amplifiers [PDF]

open access: yes, 2000
This thesis was submitted for the degree of Doctor of Philosophy and awarded by Brunel University.This thesis reports the author's investigation of the effects of the injection of specific signals on the intermodulation distortion performance of ...
Mbabele, Modeste
core   +6 more sources

Design of an Electromagnetic Band Gap Shield for a Ku-Band VSAT Transmitter Power Amplifier [PDF]

open access: yesفصلنامه علوم و فناوری فضایی, 2021
In this paper, a shielding box is designed for a Ku-band VSAT transmitter power amplifier based on an electromagnetic band gap structure. The proposed structure, is a bed of nails on the inner surface of the top wall of the box.
Mahmoud Talafi Noghani, Peiman Aliparast
doaj   +1 more source

Design of 960~1 400 MHz broadband power amplifier

open access: yesDianzi Jishu Yingyong, 2023
Based on laterally diffused metal-oxide-semiconductor (LDMOS) devices, a broadband RF power amplifier for L-band was developed. The amplifier is composed of two stages of amplification and cascade connection. In order to achieve broadband and good output
Cheng Sujie   +4 more
doaj   +1 more source

Design of a Doherty Power Amplifier for GSM Systems

open access: yesTikrit Journal of Engineering Sciences, 2011
This paper presents the design and analysis of Doherty power amplifier. The Doherty amplifier is used in a base station for mobile system because of its high efficiency.
Saad Wasmi Osman Luhaib
doaj   +1 more source

Low cost high-order Raman amplifier assisted enhanced remotely pump amplifier technology for ultra-long span OTN system

open access: yesResults in Physics, 2021
In this paper, a 420 km Optical transport network (OTN) transmission system of 8 × 100 Gbit/s signals was achieved with amplifier combination of a low cost second order Raman amplifier and an enhanced remotely pump amplifier.
Ronghua Chi, Leilei Li
doaj   +1 more source

Optimization Research on a Switching Power Amplifier and a Current Control Strategy of Active Magnetic Bearing

open access: yesIEEE Access, 2020
Active magnetic suspension bearing technology has been widely used in the field of high-speed motors because of its many technical advantages. A switching power amplifier is an important part of active magnetic bearing.
Yaping He, Xi He, Jien Ma, Youtong Fang
doaj   +1 more source

Broadband Linear High-Power Amplifier Based on the Parallel Amplification Architecture for Electromagnetic Ultrasonic Guided Wave

open access: yesSensors, 2019
The linear power amplifier with high-output power in the broadband frequency is the critical component required by exciting the electromagnetic acoustic transducer (EMAT) to generate ultrasonic guided wave (UGW).
Jinjie Zhou, Yang Zheng
doaj   +1 more source

Design of miniaturized high efficiency power amplifier based on harmonic suppression

open access: yesDianzi Jishu Yingyong, 2023
To overcome conventional VHF power amplifiers′ shortcomings of bulky size, low efficiency, and EM interferences due to output harmonics, a miniaturized, high power and high efficiency power amplifier working in VHF band is designed by using lumped ...
Liu Tianyun, Liu Shaobin
doaj   +1 more source

Tunable single-frequency ytterbium-sensitized erbium-doped fiber MOPA source with 150W (51.8 dBm) of output power at 1563 nm [PDF]

open access: yes, 2005
A single-frequency, single-mode ytterbium-sensitized erbium-doped fiber master-oscillator power-amplifier generated 150 W of continuous-wave output power at 1563 nm with 33% slope efficiency and was tuned in the range of 1546 to 1566 nm at >125 ...
Jeong, Y.   +9 more
core   +1 more source

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