High linearity and high power added efficiency power amplifier by employing adaptive bias and PBG structure

Cho, Sunghee; Seo, Chulhun

doi:10.1002/mop.22158

Cited by 1 publication

(2 citation statements)

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“…However, these filters are big in size and are not independently controlled on wavelengths [6]. The metamaterial structures are independently possible to design on wavelengths as discussed above.…”

Section: High-power Amplifier Applying Matching Circuit For Supressinmentioning

confidence: 99%

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Control scheme of harmonics and third‐order intermodulation distortion with composite right/left‐handed structure for linearity enhancement of power amplifier module

Lee

Seo

2013

Micro & Optical Tech Letters

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In this article, in order to enhance the linearity of power amplifier modules (PAM), we have suppressed the harmonics at the output port of a high-power amplifier (HPA) and cancelled the thirdorder intermodulation distortion (third IMD) by a predistortion scheme. The matching network to suppress the harmonics consists of metamaterial like the composite right/left-handed structure. Both the second and third harmonics are suppressed over 27 dBc. A phase of generated third IMD at the output of the drive amplifier has changed in order to offset the third IMD of HPA. The harmonics of the proposed PAM suppresses over 6 dB more than a single HPA and over 20 dB more than a reference power amplifier. The PAM has 37 dBm of output power and 21.6 dB of power gain. The second harmonic and third IMD are À53 and À42.5 dBc about PAM, respectively.ABSTRACT: A methodology to design high-power amplifiers composed of several amplifier blocks and passive combiners/dividers is proposed. The optimum matching condition between amplifiers and combiners has been found using the mixed-mode S-parameters approach. Measurements and computer-aided design simulations have been successfully used to validate the proposed approach. V C 2013 Wiley Periodicals, Inc. Microwave Opt Technol Lett 55:1500-1504, 2013; View this article online at wileyonlinelibrary.com.

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Section: High-power Amplifier Applying Matching Circuit For Supressinmentioning

confidence: 99%

“…In technical literature, several methods have been proposed [1][2][3][4][5][6] to define the design flow for broadband push-pull Class B power amplifiers. In case of composite amplifiers, the standard approach is to design the amplifier blocks considering standard 50-X terminations, and then to check the overall performance.…”

Section: Introductionmentioning

confidence: 99%