Zobrazeno 1 - 10
of 44
pro vyhledávání: '"Pedro, José Carlos Esteves Duarte"'
Autor:
Domingues, Paulo Henrique Grilo, Duarte, A. Manuel de Oliveira, Pedro, José Carlos Esteves Duarte
Publikováno v:
Eletrónica e Telecomunicações; Vol 2 No 5 (1999); 596-597
Eletrónica e Telecomunicações; vol. 2 n.º 5 (1999); 596-597
Eletrónica e Telecomunicações; vol. 2 n.º 5 (1999); 596-597
The work to be presented was motivated by a contribution to the design of an optical receiver for use in an all-optical cable television distribution network, and evolves over the field of Linearization of amplifiers based on GaAs MESFET devices. (..
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=proauaplataf::771812e2487aec0676d0d1154497a9d9
https://proa.ua.pt/index.php/revdeti/article/view/18828
https://proa.ua.pt/index.php/revdeti/article/view/18828
Publikováno v:
Repositório Científico de Acesso Aberto de Portugal
Repositório Científico de Acesso Aberto de Portugal (RCAAP)
instacron:RCAAP
Repositório Científico de Acesso Aberto de Portugal (RCAAP)
instacron:RCAAP
Este trabalho apresenta uma possível solução para o problema da integração do amplificador de potência em microondas e seu linearizador. Nele são revistas as técnicas mais vulgares de linearização de amplificadores, identificando-se os seus
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=dedup_wf_001::a07f428df368543dbdf6c59c5896670c
Autor:
Gomes, João Lucas Lessa
AlGaN/GaN High Electron Mobility Transistor (HEMT)s are among the preferred options for radio-frequency power amplification in cellular base station transmitters and radar applications. However, despite their promising outlook, the pervasiveness of t
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=od______2292::0ec5a3a5c3e163b1e58745dbc8a6e969
http://hdl.handle.net/10773/36289
http://hdl.handle.net/10773/36289
Solid state power amplifiers (SSPAs) evolved significantly over the last few decades, mainly, due to the use of new transistor technologies, such as gallium nitride (GaN) high-electron-mobility transistors (HEMTs), very advanced computer-aided design
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=od______2292::e212c5992a8003cd79cf99fe3d1d4d2b
http://hdl.handle.net/10773/33222
http://hdl.handle.net/10773/33222
Autor:
Barros, Diogo Rafael Bento
The aim of this work is to determine, quantify and model the performance degradation of wideband power amplifiers when subject to concurrent multiband excitation, with a particular focus on the average efficiency variation. The origins of this degrad
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=od______2292::ef16e943b56a8f1a17920ce7d5933d4d
http://hdl.handle.net/10773/33534
http://hdl.handle.net/10773/33534
Autor:
Moeini, Samaneh
In the growing trends in different technological areas, metamaterials opened new opportunities for controlling electromagnetic radiation for advanced applications. There are different types of metamaterials that a) offer negative values for the real
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=od______2292::975c4b92a731023b380b2d6692126871
http://hdl.handle.net/10773/29185
http://hdl.handle.net/10773/29185
Autor:
Moeini, Samaneh
Publikováno v:
Repositório Científico de Acesso Aberto de Portugal
Repositório Científico de Acesso Aberto de Portugal (RCAAP)
instacron:RCAAP
Repositório Científico de Acesso Aberto de Portugal (RCAAP)
instacron:RCAAP
Submitted by Cristina Santos (cmaria@ua.pt) on 2020-09-08T14:55:33Z No. of bitstreams: 1 Documento.pdf: 20263572 bytes, checksum: a03ba237dbba5300fc882c60bcf0bb66 (MD5) Made available in DSpace on 2020-09-08T14:55:33Z (GMT). No. of bitstreams: 1 Docu
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=od______3056::975c4b92a731023b380b2d6692126871
Autor:
Miranda, José Pedro Oliveira
This document focuses on techniques to make a radio frequency amplifying stage insensitive to load variation. Solutions like isolators, balanced amplifiers, balanced antenna and adaptive matching system are addressed from a theoretical point of view.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=od______2292::4f7ab7f583d5a4b670c94779fb5765e6
http://hdl.handle.net/10773/29634
http://hdl.handle.net/10773/29634
Autor:
Miranda, José Pedro Oliveira
Publikováno v:
Repositório Científico de Acesso Aberto de Portugal
Repositório Científico de Acesso Aberto de Portugal (RCAAP)
instacron:RCAAP
Repositório Científico de Acesso Aberto de Portugal (RCAAP)
instacron:RCAAP
Submitted by Marisa Figueiredo (marisa@ua.pt) on 2020-10-29T15:01:30Z No. of bitstreams: 1 Documento_João_Miranda.pdf: 13533637 bytes, checksum: 9a9c6d0b24ec450133f78780015579b0 (MD5) Made available in DSpace on 2020-10-29T15:01:30Z (GMT). No. of bi
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=od______3056::4f7ab7f583d5a4b670c94779fb5765e6
Autor:
Mendes, João Paulo Louro
This dissertation proposes the implementation of an Outphasing PA architecture for mobile communication transmitters. In this work, the main focus is the development of a functional prototype that demonstrates power efficiency improvements at high po
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=od______2292::b93b22c3898d09a5adc909c41f25e75a
http://hdl.handle.net/10773/26110
http://hdl.handle.net/10773/26110