Zobrazeno 1 - 10
of 21
pro vyhledávání: '"Bokuji Komiyama"'
Publikováno v:
IEEE Transactions on Antennas and Propagation. 54:3374-3382
We examine that an inductively loaded dipole becomes electrical invisible showing that the influence on a nearby antenna's input impedance and on its radiation pattern (scattering) are minimized. We also verify that the direction of the current rever
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f9feff50b571012503b09d9b540ee025
https://doi.org/10.1109/tap.2006.884297
https://doi.org/10.1109/tap.2006.884297
Publikováno v:
Electronics and Communications in Japan (Part I: Communications). 89:21-35
This paper shows that the integral of the current flowing on a parasitic dipole can be made to vanish by supplying a reactance with an appropriate value. When a reactor is placed at the center of a half-wave dipole with a thickness of 0.02 wavelength
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::6a5a2b2ab3b2a849f0cbb53002429223
https://doi.org/10.1002/ecja.20262
https://doi.org/10.1002/ecja.20262
Publikováno v:
Electronics and Communications in Japan (Part I: Communications). 89:31-44
When the transmission and reception locations of radio waves are different, the correlation of the radio wave propagation characteristics decays quickly. On the other hand, reciprocity of the radio wave propagation holds between two stations that can
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e6f5f6fd8fb1c9bec59e5cac2e49e737
https://doi.org/10.1002/ecja.20305
https://doi.org/10.1002/ecja.20305
Autor:
Shinsuke Tanaka, Somprakash Bandyopadhyay, Siuli Roy, Tetsuro Ueda, Bokuji Komiyama, Dola Saha
Publikováno v:
Wireless Communications and Mobile Computing. 6:191-199
A fundamental problem that distinguishes wireless networks from wired networks is the mutual interference between routes within the proximity of each other. This phenomenon is known as route coupling and it restricts the possibility of occurrence of
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::deb258745f0266406c400bdf7964fbbf
https://doi.org/10.1002/wcm.379
https://doi.org/10.1002/wcm.379
Publikováno v:
IEEE Transactions on Antennas and Propagation. 53:3776-3784
We describe a secure communication scheme that uses the random fluctuation of the natural environment of communication channels. Only the transmitter and the receiver share the communication channel characteristics. From reciprocity between a transmi
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::7da478d2c1b4be406945a25242b022c6
https://doi.org/10.1109/tap.2005.858853
https://doi.org/10.1109/tap.2005.858853
Publikováno v:
Electronics and Communications in Japan (Part I: Communications). 89:22-35
In this paper, we show that the current distribution along the parasitic dipole elements loaded by variable reactors varies greatly depending on the variable reactor value. Thus, when the directionality of an Electronically Steerable Passive Array Ra
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::164c4a52311187ead3bf778ebe1c0a1e
https://doi.org/10.1002/ecja.20232
https://doi.org/10.1002/ecja.20232
Publikováno v:
Journal of Applied Physics. 79:7837-7842
Single‐crystal niobium nitride (NbN) thin films were fabricated at ambient substrate temperature so that photoresist lift‐off techniques could be used in fabricating Josephson tunnel junctions. In this article, we describe the superconducting pro
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f196cf61491efb74223e64265cce185b
https://doi.org/10.1063/1.362392
https://doi.org/10.1063/1.362392
Publikováno v:
Electronics and Communications in Japan (Part II: Electronics). 77:74-82
Josephson junctions with microstrip resonators fabricated. By observing the current steps caused by the mutual interaction between the high-frequency current due to the ac Josephson effect and resonator, the dielectric constants of the dielectric thi
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::3b31f28b56c1a6a23f18b392f7ff3d21
https://doi.org/10.1002/ecjb.4420770309
https://doi.org/10.1002/ecjb.4420770309
Publikováno v:
Electronics and Communications in Japan (Part II: Electronics). 76:78-87
To reduce the self-heating effect and thermal noise in bridge-type Josephson mixers, all-NbN nanobridges with an Al “direct shunt” resistor were fabricated. This paper describes the millimeter-wave response and mixing properties of the NbN(g)/Al
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b5ea675fe6d4cd5a32e03a5f9cb8e0cd
https://doi.org/10.1002/ecjb.4420760609
https://doi.org/10.1002/ecjb.4420760609
Publikováno v:
SPIE Proceedings.
Recent topics on ESPAR (Electronically Steerable Parasitic Array Radiator) antennas, which we have proposed as an adaptive antenna for mobile user terminals, are described. The measurement characteristics of a 2.4 GHz 7-element ESPAR antenna are give
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::92c27c4828ba17c407b1419a1f92cc82
https://doi.org/10.1117/12.560664
https://doi.org/10.1117/12.560664