Zobrazeno 1 - 10
of 19
pro vyhledávání: '"Naofumi Okubo"'
Autor:
Naofumi Okubo
Publikováno v:
The Journal of The Institute of Electrical Engineers of Japan. 118:422-425
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ccdfdd05f7329678f126d8c2042303bf
https://doi.org/10.1541/ieejjournal.118.422
https://doi.org/10.1541/ieejjournal.118.422
Publikováno v:
IEEE Transactions on Communications. 45:429-436
This paper describes the theoretical performance of a frequency-hopping system using Gaussian-filtered FSK (GFSK), which is a promising candidate for 2.4-GHz wireless local area networks (WLAN). We have improved previous methods to calculate the bit-
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::7d694157c6d2a4deccb3eb07562e88bf
https://doi.org/10.1109/26.585918
https://doi.org/10.1109/26.585918
Publikováno v:
IEEE Transactions on Microwave Theory and Techniques. 45:1630-1633
We propose an approach to describe the large-signal behavior of a high electron-mobility transistor (HEMT) by using a multilayered neural network. To conveniently implement this in standard circuit simulators, we extracted the HEMT's bias dependent b
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ed10a6cea86a2b6a5af97610724516c7
https://doi.org/10.1109/22.622932
https://doi.org/10.1109/22.622932
Publikováno v:
IEEE Transactions on Microwave Theory and Techniques. 41:199-205
The authors propose a method of characterizing active devices such as the FET by describing S-parameters with a set of rational functions of angular frequency. The set of rational functions is uniquely determined by only 27 coefficients, while the co
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::0f666a763fb4d00f0b4ca8e79977f377
https://doi.org/10.1109/22.216457
https://doi.org/10.1109/22.216457
Publikováno v:
Electronics and Communications in Japan (Part I: Communications). 75:89-103
Recently, research and development of mobile communications satellites has progressed in every country, and the key technologies for improvement have increased the output power and efficiency of solid-state power amplifiers used in high-output transp
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::74f689fd9aa14db090e89d960b3dbed8
https://doi.org/10.1002/ecja.4410751008
https://doi.org/10.1002/ecja.4410751008
Publikováno v:
Electronics and Communications in Japan (Part II: Electronics). 73:43-55
The waveguide to microstrip line transition has been used widely in the microwave and millimeter wave bands for several radio communication systems. Since transition from solid waveguide to planar microstrip line is involved, the internal field distr
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::4fbe343898e0d9573f8c0263b65f7872
https://doi.org/10.1002/ecjb.4420730705
https://doi.org/10.1002/ecjb.4420730705
Publikováno v:
IEEE Transactions on Microwave Theory and Techniques. 44:622-624
We propose an empirical large-signal model of high electron mobility transistors (HEMTs). The bias-dependent data of small-signal equivalent circuit elements are obtained from S-parameters measured at various bias settings. And C/sub gs/, C/sub gd/,
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::488c5603ce1fe033d0c1d7c5fd84c45a
https://doi.org/10.1109/22.491030
https://doi.org/10.1109/22.491030
Publikováno v:
1992 IEEE Microwave Symposium Digest MTT-S.
The authors have developed a 60-GHz FM-continuous wave (CW) radar module that generates sidebands by switching a high electron mobility transistor (HEMT) front-end. The module also uses heterodyne detection for FM-AM conversion noise reduction. The m
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::351f5d56bde5392806f3c8381e30cfb0
https://doi.org/10.1109/mwsym.1992.188084
https://doi.org/10.1109/mwsym.1992.188084
Publikováno v:
IEEE 1996 Microwave and Millimeter-Wave Monolithic Circuits Symposium. Digest of Papers.
We have developed a 15/60 GHz one-stage MMIC frequency quadrupler using a 0.25-/spl mu/m AlGaAs/GaAs HEMT. The HEMT was characterized by our empirical large-signal model, in which charge conservation and dispersion are taken into consideration. We in
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::65b08310e32baf42b9c617597bec07ee
https://doi.org/10.1109/mcs.1996.506298
https://doi.org/10.1109/mcs.1996.506298
Autor:
Kazuo Shirakawa, Naofumi Okubo
Publikováno v:
27th European Microwave Conference, 1997.
This paper reports on a general approach to build a large-signal, neural network HEMT model using a genetic algorithm. By representing the configuration of a neural network model as the chromosome of a virtual creature, we looked for an optimum netwo
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::5a0c1d129747d580e4a516a4cae27d72
https://doi.org/10.1109/euma.1997.337837
https://doi.org/10.1109/euma.1997.337837