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Akademický článek

An Increase of a Down-Hole Nuclear Magnetic Resonance Tool’s Reliability and Accuracy by the Cancellation of a Multi-Module DC/AC Converter’s Output’s Higher Harmonics

Autor: Alexey Tyshko, Saulius Balevicius, Sanjeevikumar Padmanaban

Publikováno v: IEEE Access, Vol 4, Pp 7912-7920 (2016)

Described in this paper is a method for improving higher harmonic cancellation in nuclear magnetic resonance transmitters, which are used in oil and gas well logging tools operating at 175 °C. Multi-module multi-level topology which combines the out

Externí odkaz: https://doaj.org/article/c7928b1029c04e84af28826fd7f83cea

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Akademický článek

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Transmissor RF de elevado rendimento com duas entradas digitais para sistemas 5G

Autor: Pereira, Bruno Xavier Mendez

In recent years, there has been a need to increase the capacity and speed of information transmission, so the communication signals used in mobile communications have been improved to meet the expectations. This will be even more significant in futur

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=od______2292::b34adf5790913bd3293eb381cbba6140
http://hdl.handle.net/10773/36745

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Measurement testbeds for the characterization of nonlinear single and dual input devices using multitones and modulated signals

Autor: THAIMI NIUBO ALEMAN

Publikováno v: Centro de Investigación Científica y de Educación Superior de Ensenada
CICESE
Repositorio Institucional CICESE

In a mobile communication system, the RF amplifier is the element with the highest power consumption and which introduces unwanted spectral components in the signal to be transmitted. Its design must provide the highest possible efficiency, and reduc

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=od______3056::ea76a7504bc081643acae9f49ddb4430
http://cicese.repositorioinstitucional.mx/jspui/handle/1007/3620

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Akademický článek

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Current-injected load-modulated outphasing amplifier for extended power range operation

Autor: David Vegas, Ana Cordero, Jose A. Garcia, M. Nieves Ruiz

Publikováno v: IEEE Microwave and Wireless Components Letters, 2021, 31(6), 713-716
IEEE/MTT-S International Microwave Symposium (IMS), Atlanta, GA, USA, 2021
UCrea Repositorio Abierto de la Universidad de Cantabria
Universidad de Cantabria (UC)

In this letter, the power range to be covered with maximized efficiency by a two-way outphasing power amplifier (PA) is significantly extended thanks to a proposed architecture with injection of an external signal. Using a reactively terminated quadr

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::fc964c06e62d51707cf3d72ac6f0bfa7
http://hdl.handle.net/10902/21918

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Outphasing Class-E/ F2 Power Amplifier using a Quadrature Hybrid as Non-Isolating Combiner

Autor: Ana Cordero, Jose A. Garcia, David Vegas, M. Nieves Ruiz

Publikováno v: IEEE Topical Conference on RF/Microwave Power Amplifiers for Radio and Wireless Applications (PAWR): Virtual Conference, San Diego, CA, 2021, 55-58
UCrea Repositorio Abierto de la Universidad de Cantabria
Universidad de Cantabria (UC)

This paper presents a GaN HEMT outphasing power amplifier (PA), based on a class-E/ F 2 topology with reduced sensitivity to variable resistive load operation, designed to provide output power control over an extended range with high efficiency. A 90

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::97031e7366ba978d815fbe8616121941
https://doi.org/10.1109/pawr51852.2021.9375540

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