Zobrazeno 1 - 10
of 22
pro vyhledávání: '"Toshihiro Nomoto"'
Publikováno v:
IEICE Electronics Express. 2:471-476
Means of reducing the conductor loss of a liquid crystal millimeter-wave beam former were studied. The conductor loss is caused by surface currents flowing on electrodes of the beam former for applying control voltages to the liquid crystal layers. B
Autor:
Toshihiro Nomoto
Publikováno v:
IEEJ Transactions on Electronics, Information and Systems. 124:244-249
Publikováno v:
IEEE Transactions on Microwave Theory and Techniques. 50:2604-2609
A method was investigated to reduce the insertion loss and response time in the phase shift in a microwave variable delay line using liquid crystal (LC). In variable delay lines using conventional nematic LC, reducing the insertion loss conflicts wit
Publikováno v:
Journal of Applied Physics. 89:5295-5298
This article describes the use of thick polymer-stabilized liquid crystal films in a new design for microwave variable phase shifters. A fine μm-order sized polymer network was formed in a 100-μm-thick liquid crystal film, using a photopolymerizati
Autor:
Toshihiro Nomoto, Takao Kuki
Publikováno v:
Electronics and Communications in Japan (Part II: Electronics). 81:30-37
Publikováno v:
Applied Physics Letters. 83:1815-1817
This letter describes a variable microwave delay line that uses a thick ferroelectric liquid crystal film stabilized by aligned polymer fibers of submicron diameter. The delay line consists of a microstrip transmission line with a 50-μm-thick liquid
Publikováno v:
IEEE Microwave and Wireless Components Letters. 11:19-21
Optical injection locking was experimentally performed using a 38-GHz-band InP-based HEMT MMIC oscillator and a 1.55-/spl mu/m lightwave. Two optical modulation schemes were compared for optical injection locking, and no difference was found except f
Publikováno v:
22nd AIAA International Communications Satellite Systems Conference & Exhibit 2004 (ICSSC).
A previously proposed variable equivalent isotropic radiated power (e.i.r.p.) satellite system, which uses phased array antenna technology to increase the radiated power only in areas of heavy rainfall, has now been conceptually applied to the future
Publikováno v:
Scopus-Elsevier
A microwave variable delay line using a membrane impregnated with liquid crystal was newly fabricated. By employing this device configuration, the phase-shift response becomes fast independently of the liquid crystal thickness. Experimental results s
Autor:
Takao Kuki, Toshihiro Nomoto
Publikováno v:
Proceedings of 1995 IEEE MTT-S International Microwave Symposium.
We have developed a reflection type of signal-to-noise enhancer operating in the 400-MHz band, which can easily be inserted into the second IF stage used in current DBS receivers. The new enhancer consists of a microstrip line using a ceramic substra