Zobrazeno 1 - 10
of 11
pro vyhledávání: '"Harunobu Seita"'
Autor:
Yuki Furuse, Shigeo Kawasaki, Harunobu Seita, Satoshi Yoshida, Toshihiro Nakaoka, Kenjiro Nishikawa, Ryoko Kishikawa
Publikováno v:
2017 IEEE International Symposium on Radio-Frequency Integration Technology (RFIT).
A compact C-band energy harvester is designed, test fabricated, and measured. An RF hybrid semiconductor integrated circuit (RF-HySIC) rectifier was fabricated by comprising a Si RFIC matching circuit and a GaN diode. The energy harvester at 5.8-GHz
Autor:
Akihira Miyachi, Harunobu Seita, Shigeo Kawasaki, Ryoko Kishikawa, Toshiya Nakaoka, Yuki Furuse, Masahiro Horibe, Kenjiro Nishikawa, Satoshi Yoshida
Publikováno v:
2017 IEEE Wireless Power Transfer Conference (WPTC).
This paper reports on a rectifier with 100 mW class dc output at 5.8 GHz using a gallium nitride (GaN) shottly barrier diode and silicon (Si) matching circuit. The originality of the study lies in its adaptation of the hybrid semiconductor integrated
Autor:
Harunobu Seita, Shigeo Kawasaki
Publikováno v:
IEICE Transactions on Electronics. (11):1757-1764
Compact and planar active integrated antenna arrays with a high power multi-stage amplifier were developed with effective heat sink mechanism. By attaching an aluminum plate to the backside of the creased amplifier circuit board, effective cooling ca
Autor:
Kentaro Nishimori, Harunobu Seita, Naoki Honma, Midori Kawasaki, Sigeo Kawasaki, Yusuke Maru, Kenjiro Nishikawa, Ryo Takamori
Publikováno v:
2013 IEEE Wireless Power Transfer (WPT).
This paper proposes a wireless sensor network system in a rocket and describes the architecture of sensor tags. The proposed health monitoring system based on the wireless sensor network employs MIMO communication systems, dual-band; 5GHz for downlin
Publikováno v:
2010 IEEE Radio and Wireless Symposium (RWS).
5.8 GHz band digital phase shifters to control a beam direction for an Active Integrated Phased Array Antenna (AIPAA) are designed. The 4-bit phase shifters with integrated GaAs FET SPDT switches are integrated with an LTCC substrate. We realized a l
Autor:
Shigeo Kawasaki, Harunobu Seita, Hiroshi Toshiyoshi, Kiyotaka Yamashita, Hiroyuki Fujita, Daisuke Yamane
Publikováno v:
2009 Asia Pacific Microwave Conference.
Integration of Low Temperature Co-fired Ceramics (LTCC) technology and RF-MEMS is applicable for the realization of a small and cost-effective phase shifter. In this paper, a line-switched-type phase shifter with 3D waveguide structures and a novel d
Publikováno v:
2009 IEEE 22nd International Conference on Micro Electro Mechanical Systems.
A novel design of double-pole double-throw (DPDT) RF-MEMS switch for 12-GHz phase shifter has been developed to minimize the electrical crosstalk between the signal waveguide and electrostatic actuator by allocating them in separate layers of an SOI
Publikováno v:
2008 China-Japan Joint Microwave Conference.
Development of a prototype of high power active integrated phased array antenna operating at 5.8 GHz was introduced in this paper. In the AIPAA system for telecommunication as well as wireless power transmission, the two-stage amplifier operated with
Autor:
Kiyotaka Yamashita, Takeshi Yamamoto, Kimiya Komurasaki, S. Kawasaki, Eri Shimane, Harunobu Seita
Publikováno v:
2008 China-Japan Joint Microwave Conference.
5.8 GHz band digital phase shifters to control a beam direction for an active integrated phased array antenna are designed. The 4-bit phase shifters with integrated GaAs FET SPDT switches are integrated with an LTCC substrate. We realized a low loss
Publikováno v:
2008 IEEE Antennas and Propagation Society International Symposium.
There are many sophisticated but high-cost radar systems. However, due to recent progress on wireless electronics technologies, some of them can be realized with compactness and low-cost. One example is a high performance active phased array antenna