ENGINEERING RESEARCH PAPERS

power amplifier research papers 2015 IEEE PAPER




A Class-J Power Amplifier with Varactor-based Dynamic Load Modulation Across a Large Bandwidth
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Abstract:A novel class-J operated power amplifier (PA) utilizing varactor-based dynamic load modulation is presented. It is theoretically shown that the proposed PA can maintain high average efficiency across more than 35% RF bandwidth by means of a purely

Highly Efficient Envelope-Tracking Modulator Over Wide Output Power Range for Dual-ModePower Amplifier
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Abstract-This paper presents a highly efficient envelope-tracking (ET) modulator over wide output power range. The ET modulator is designed to operate with a dual-mode power amplifier (PA). The supply voltage of the linear regulator is adjusted according to the

Research on the Steady State and Ripple Current Models of Current Mode Switching Power Amplifier for Magnetic Bearing
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ABSTRACT The current mode switching power amplifier is an essential component in magnetic bearing system which works in the nonlinear switching state. At present, the characteristics of the power amplifier can be revealed partially by establishing first order

High-Gain and Low-Power Power Amplifier for 24-GHz Automotive Radars
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Abstract This paper presents a high gain and low power 24-GHz power amplifier (PA) for the short range automotive radar. The proposed circuit is implemented using TSMC 0.13-m RF CMOS (fT/fmax= 120/140 GHz) technology, and it is powered by a 1.5-V supply. To

Design of CPW Based Wideband Efficient Power Amplifier for Wireless Applications
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ABSTRACT In this paper the author has given a new technique of designing power amplifier (PA) using 50 matched coplanar waveguide (CPW) component in order to improve power efficiency for K-band and other wireless application. In this present work CPW line is used

Intelligent Control in Current Digital Switching Power Amplifier for Active Magnetic Bearing
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Abstract To effectively reduce the influence of high power loss and low reliability caused by fixed supply voltage for current switching power amplifier, a new and simple circuit with intelligent control is proposed in this paper. The digital control strategy of minimum

Extraction of Accurate GaN HEMT Model for High-Efficiency Power Amplifier Design
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Abstract:In this paper the nonlinear model of a GaN transistor is extracted starting from dynamic bias measurements under class-F operation. Thanks to this technique, applied for the first time to high-efficiency classes of operation, one can get at once and separately

Analysis of the Second Harmonic Effect on Power Amplifier Intermodulation Products
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Abstract:A theoretical analysis is reported in this paper to investigate the effect that a second harmonic signal which might be present at an amplifier's input has on generating additional intermodulation products, particularly the third-order intermodulation (IM3)

A 4W GaAs Power Amplifier MMIC for Ku-band Satellite Communication Applications
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Abstract:In this paper, we demonstrated a 4W power amplifier monolithic microwave integrated circuit (MMIC) for Ku-band satellite communication applications. The used device technology relies on 0.25 m GaAs pseudomorphic high electron mobility transistor (

Modified Output Combining 3-Stage Doherty Power Amplifier Design for LTE Micro eNodeB
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Abstract This paper presents a highly efficient modified output combining 3-stage Doherty Power Amplifier (DPA) design using low power LDMOS transistor for Band 40, TD-LTE Micro eNodeB. In this design, modified output combining technique has been used in the output

WCDMA System using High Power Amplifier
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Abstract This paper analyzes the performance of Wireless CDMA when high power amplifier use in the processing block of this. The simulation is carried out on MATLAB 7.8. 1, the result shows the BER, MER comparison of WCDMA with using and without using high power

Class-D Audio Power Amplifier
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Page 1. Class-D Audio Power Amplifier Power stage designs Low-pass (LC) filter designs OC/OV/OT protections Four switching power amplifier designs results Conclusions Page

Design of an Advanced CMOS Power Amplifier
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Abstract The CMOS power amplifier (PA) is a promising solution for highly-integrated transmitters in a single chip. However, the implementation of PAs using the CMOS process is a major challenge because of the inferior characteristics of CMOS devices. This paper

Towards Generalized Doherty Power Amplifier Design for Wideband Multimode Operation
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Doherty power amplifier that employs a novel output combiner. A new parameter is introduced to permit a generalized analysis of the recently reported Parallel Doherty power amplifier (PDPA), and hence offer design flexibility. The circuit prototype of the new DPA

A 2.4 GHz-Band 100 W GaN-HEMT High-Efficiency Power Amplifier for Microwave Heating
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Abstract The magnetron, a vacuum tube, is currently the usual high-power microwave power source used for microwave heating. However, the oscillating frequency and output power are unstable and noisy due to the low quality of the high-voltage power supply and low Q

Effects of Proton-Induced Displacement Damage on Gallium Nitride Power Amplifier RF Performance
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High frequency RF and microwave communications systems for military, space, and telecommunications applications require efficient power amplifiers with high power density. In the quest for faster and more reliable RF communication systems, many advances have

Cascade Structure of Digital Predistorter for Power Amplifier Linearization
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In this paper, a cascade structure of nonlinear digital predistorter (DPD) synthesized by the direct learning adaptive algorithm is represented. DPD is used for linearization of power amplifier (PA) characteristic, namely for compensation of PA nonlinear distortion. Blocks of

DESIGN OF A HIGH EFFICIENCY POWER AMPLIFIER FOR WIRELESS AND RADAR APPLICATIONS
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ABSTRACT This article reports a 46% efficient Class-A power amplifier (PA) designed for wireless transceiver communication systems. The compensation elements with a series capacitor and a shunt inductor are used to compensate for the internal parasitic

Adaptive Biasing Low Power Amplifier Using CMOS Technology
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ABSTRACT In this study, an adaptive biasing CMOS operational amplifier is presented which operates at 3 V power supply and simulated at 180 and 90 nm technologies. The adaptive biasing current circuit controls the input voltages and supplies the amplifier with

1 kW Solid-State Power Amplifier at 100 MHz for Use in Cyclotron
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Abstract The latest development in LDMOS transistor technology has enabled it as a replacement for the traditional electron tube amplifiers, making the amplifiers more efficient and less expensive. The thesis set out to investigate whether it was possible to achieve a

CMOS Microwave Power Amplifier Design for Chireix
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Starting without experience in PA design and Cadence, this master thesis certainly has been a challenging and very interesting experience.

A 6 Gb/s Low Power Transimpedance Amplifier with Inductor Peaking and Gain Control for 4-channel Passive Optical Network in 0.13 mu m CMOS
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an associate professor. His research interests include poweramplifier design, RF transmitters, RFIC design, integrated circuit design for RFID/USN systems, and modeling of high power amplifiers or devices. Munkyo Seo received

Class D Audio Amplifier Design with Power Supply Noise Cancellation
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Page 1. Class D Audio Amplifier Design with Power Supply Noise Cancellation by Jing Bai A Thesis Presented in Partial Fulfillment of the Requirements for the Degree Master of Science Approved November 2015 by the Graduate Supervisory Committee:

A New Multi-Level Switching Amplifier Architecture with Improved Power Efficiency
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NONLINEAR MODELLING OF RADIO FREQUENCY POWER AMPLIFIER BY USING ARTIFICIAL NEURAL NETWORK
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Nowadays large part of modern communication systems can be mostly implemented by digital circuits. As a result of this, at the radio frequency (RF) front end less circuit components are used. One of the important circuit component at RF front-end is RF power



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