			Home About us Contact

Microwave Power Amplifiers (microwave + power_amplifier)

Distribution by Scientific Domains

Engineering	100%

Selected Abstracts

Nonlinear approaches to the design of microwave power amplifiers

INTERNATIONAL JOURNAL OF RF AND MICROWAVE COMPUTER-AIDED ENGINEERING, Issue 6 2004
Paolo Colantonio
Abstract Commonly used approaches for the design of power amplifiers (PAs), specifically in the microwave and millimeter-wave frequency range, are reviewed and discussed. Measurement-based techniques are compared with CAD-based approaches, stressing their relative strengths and weaknesses. Simplified techniques are also discussed, particularly addressing the preliminary evaluation of the power capabilities of a given device and to gather physical insight into the power-generating mechanisms. Finally, harmonic tuning for high-efficiency power amplifier design is outlined, together with its basic application rules. © 2004 Wiley Periodicals, Inc. Int J RF and Microwave CAE 14: 493,506, 2004. [source]

Multiharmonic manipulation for highly efficient microwave power amplifiers

INTERNATIONAL JOURNAL OF RF AND MICROWAVE COMPUTER-AIDED ENGINEERING, Issue 6 2001
Paolo Colantonio
Abstract Multiharmonic manipulation is presented as the most effective solution to improve power amplifier (PA) efficiency performances. Remarkable improvements in output power, power gain and power-added efficiency (PAE) are demonstrated, properly manipulating the input and output second and third harmonics, as compared to more classical design approaches. Experimental results at 5GHz confirm the feasibility, the validity and effectiveness of the proposed approach, increasing the maximum measured power-added efficiency from 39% to 61% © 2001 John Wiley & Sons, Inc. Int J RF and Microwave CAE 11: 366,384, 2001 [source]

Performance evaluations of microwave power amplifiers with single- and multi-carrier quadrature amplitude modulations

MICROWAVE AND OPTICAL TECHNOLOGY LETTERS, Issue 12 2006
Chien-Chang Huang
Abstract This article presents the performance evaluations of microwave power amplifiers (PAs) for different kinds of quadrature amplitude modulation (QAM) schemes including ,/4-DQPSK and 16-QAM for single-carrier formats and orthogonal frequency division multiplexing (OFDM) for multi-carrier configuration, by using the time-domain signal processing technique and the hybrid Volterra analysis. The influences due to various peak-to-average power ratios (PAPRs) of the modulation signals for the PA performances such as output powers, adjacent channel power ratios (ACPRs), and error vector magnitudes (EVMs) are shown with experimental verifications. A figure-of-merit of PAs based on linearity and efficiency is presented to establish a criterion for choosing the best working condition. © 2006 Wiley Periodicals, Inc. Microwave Opt Technol Lett 48: 2375,2378, 2006; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.22020 [source]