IEICE Trans

Tomohiro SEKI

Alignment Tolerance in Multiple-Stream Transmission Using Orthogonal Directivities under Line-of-Sight Environments Maki ARAI Tomohiro SEKI Ken HIRAGA Kazumitsu SAKAMOTO Tadao NAKAGAWA
Publication: IEICE TRANSACTIONS on Communications Publication Date: 2016/06/01 Vol. E99-B No. 6 pp. 1362-1370 Type of Manuscript: PAPER Category: Antennas and Propagation Keyword: MIMO, directivity, spatial division, channel capacity,
	Summary \| Full Text:PDF

Orthogonalized Directional MIMO Transmission Using Higher Order Mode Microstrip Antennas Maki ARAI Tomohiro SEKI Ken HIRAGA Kazumitsu SAKAMOTO Hideki TOSHINAGA Tadao NAKAGAWA
Publication: IEICE TRANSACTIONS on Communications Publication Date: 2016/01/01 Vol. E99-B No. 1 pp. 48-57 Type of Manuscript: Special Section PAPER (Special Section on Recent Progress in Antennas, Propagation and Wireless Systems Related to Topics in ISAP2014) Category: Antennas and Propagation Keyword: MIMO, directivity, higher order mode, capacity,
	Summary \| Full Text:PDF

Spatial Division Transmission without Signal Processing for MIMO Detection Utilizing Two-Ray Fading Ken HIRAGA Kazumitsu SAKAMOTO Maki ARAI Tomohiro SEKI Tadao NAKAGAWA Kazuhiro UEHARA
Publication: IEICE TRANSACTIONS on Communications Publication Date: 2014/11/01 Vol. E97-B No. 11 pp. 2491-2501 Type of Manuscript: PAPER Category: Wireless Communication Technologies Keyword: spatial division transmission, array a ntennas, parallel transmission, line-of-sight (LOS), two-ray ground reflection model, reflection coefficient, polarization,
	Summary \| Full Text:PDF

Multiband Sector Antenna with the Same Beamwidth Employing Multiple Woodpile Metamaterial Reflectors Hideya SO Atsuya ANDO Tomohiro SEKI Munenari KAWASHIMA Takatoshi SUGIYAMA
Publication: IEICE TRANSACTIONS on Electronics Publication Date: 2014/10/01 Vol. E97-C No. 10 pp. 976-985 Type of Manuscript: Special Section PAPER (Special Section on Recent Progress in Microwave and Millimeter-wave Technologies) Category: Keyword: sector base station antenna, multiband antenna, metamaterial, electromagnetic band gap (EBG) characteristics,
	Summary \| Full Text:PDF

Analog Decoding Method for Simplified Short-Range MIMO Transmission Ryochi KATAOKA Kentaro NISHIMORI Takefumi HIRAGURI Naoki HONMA Tomohiro SEKI Ken HIRAGA Hideo MAKINO
Publication: IEICE TRANSACTIONS on Communications Publication Date: 2014/03/01 Vol. E97-B No. 3 pp. 620-630 Type of Manuscript: PAPER Category: Antennas and Propagation Keyword: short-range MIMO transmission, zero forcing, unitary matrix, 90-degree phase shifter, optimal element spacing,
	Summary \| Full Text:PDF

A Study of Short-Range MIMO Transmission Utilizing Polarization Multiplexing for the Simplification of Decoding Ken HIRAGA Kazumitsu SAKAMOTO Kentaro NISHIMORI Tomohiro SEKI Tadao NAKAGAWA Kazuhiro UEHARA
Publication: IEICE TRANSACTIONS on Communications Publication Date: 2014/02/01 Vol. E97-B No. 2 pp. 459-468 Type of Manuscript: PAPER Category: Antennas and Propagation Keyword: short-range, MIMO, polarization multiplexing, XPD, antennas, decoding,
	Summary \| Full Text:PDF

Performance Evaluation of Short-Range MIMO Using a Method for Controlling Phase Difference between Each Propagation Channel Kazumitsu SAKAMOTO Ken HIRAGA Tomohiro SEKI Tadao NAKAGAWA Kazuhiro UEHARA
Publication: IEICE TRANSACTIONS on Communications Publication Date: 2013/10/01 Vol. E96-B No. 10 pp. 2513-2520 Type of Manuscript: Special Section PAPER (Special Section on Recent Progress in Antennas and Propagation in Conjunction with Main Topics of ISAP2012) Category: Adaptive Array Antennas/MIMO Keyword: short-range MIMO, controlling phase difference, power ratio, sub-array antenna, millimeter-wave, simple decoding method,
	Summary \| Full Text:PDF

Effectiveness of Short-Range MIMO Using Dual-Polarized Antenna Ken HIRAGA Tomohiro SEKI Kentaro NISHIMORI Kazuhiro UEHARA
Publication: IEICE TRANSACTIONS on Communications Publication Date: 2012/01/01 Vol. E95-B No. 1 pp. 87-96 Type of Manuscript: Special Section PAPER (Special Section on Recent Progress in Antennas and Propagation in Conjunction with Main Topics of ISAP2010) Category: Radio Systems Keyword: short-range MIMO, dual-polarization, array antennas, parallel transmission, high-speed transmission,
	Summary \| Full Text:PDF

Analyses of Antenna Displacement in Short-Range MIMO Transmission over Millimeter-Wave Ken HIRAGA Tomohiro SEKI Kentaro NISHIMORI Kenjiro NISHIKAWA Ichihiko TOYODA Kazuhiro UEHARA
Publication: IEICE TRANSACTIONS on Communications Publication Date: 2011/10/01 Vol. E94-B No. 10 pp. 2891-2895 Type of Manuscript: LETTER Category: Antennas and Propagation Keyword: short-range, MIMO, millimeter-wave, antennas, parallel transmission,
	Summary \| Full Text:PDF

An Analysis of Multi-Layer Inductors for Miniaturizing of GaAs MMIC Yo YAMAGUCHI Takana KAHO Motoharu SASAKI Kenjiro NISHIKAWA Tomohiro SEKI Tadao NAKAGAWA Kazuhiro UEHARA Kiyomichi ARAKI
Publication: IEICE TRANSACTIONS on Electronics Publication Date: 2010/07/01 Vol. E93-C No. 7 pp. 1119-1125 Type of Manuscript: Special Section PAPER (Special Section on Recent Progress in Microwave and Millimeter-Wave Technologies) Category: Keyword: multi-layer inductor, stacked inductor, three-dimensional MMIC, GaAs,
	Summary \| Full Text:PDF

Series-Fed Beam-Scanning Antenna Employing Multi-Stage Configured Microstrip Antennas with Tunable Reactance Devices Naoki HONMA Tomohiro SEKI Kenjiro NISHIKAWA Koichi TSUNEKAWA Kunio SAWAYA
Publication: IEICE TRANSACTIONS on Communications Publication Date: 2005/06/01 Vol. E88-B No. 6 pp. 2297-2304 Type of Manuscript: Special Section PAPER (Special Section on 2004 International Symposium on Antennas and Propagation) Category: Keyword: tunable reactance device, microstrip antenna, beam scanning, multi-stage, traveling wave,
	Summary \| Full Text:PDF

25 GHz Band Active Integrated Antenna for Broadband Mobile Wireless Access Systems Tomohiro SEKI Fusao NUNO Takeo ATSUGI Masahiro UMEHIRA Junji SATO Takashi ENOKI
Publication: IEICE TRANSACTIONS on Electronics Publication Date: 2003/08/01 Vol. E86-C No. 8 pp. 1520-1526 Type of Manuscript: Special Section PAPER (Special Issue on Microwave and Millimeter Wave Technology) Category: Keyword: active integrated antenna, MSL/slot transition, spatial power combining schemes, broadband mobile wireless access, quasi-millimeter and millimeter-wave frequency band,
	Summary \| Full Text:PDF

Cylindrical Multi-Sector Antenna with Self-Selecting Switching Circuit Tomohiro SEKI Toshikazu HORI
Publication: IEICE TRANSACTIONS on Communications Publication Date: 2001/09/01 Vol. E84-B No. 9 pp. 2407-2412 Type of Manuscript: Special Section PAPER (Special Issue on Innovation in Antennas and Propagation for Expanding Radio Systems) Category: Millimeter-Wave Antennas Keyword: high-speed wireless communication, sector antenna, quasi-millimeter and millimeter-wave frequency band, cylindrical antenna,
	Summary \| Full Text:PDF

Mobile Multimedia Satellite Communication System at Ku Band Fumiaki NAGASE Hiroshi TANAKA Masayoshi NAKAYAMA Tomohiro SEKI Hiroshi KAZAMA Hideki MIZUNO
Publication: IEICE TRANSACTIONS on Communications Publication Date: 2001/04/01 Vol. E84-B No. 4 pp. 903-909 Type of Manuscript: Special Section PAPER (Special Issue on Mobile Multimedia Communications) Category: Keyword: satellite communication, mobile communication, multimedia, tracking antenna, system throughput,
	Summary \| Full Text:PDF

30-GHz Multibeam Antenna Using Bi-Layer Butler Matrix Circuits Tomohiro SEKI Kazuhiro UEHARA Kenichi KAGOSHIMA
Publication: IEICE TRANSACTIONS on Communications Publication Date: 1996/12/25 Vol. E79-B No. 12 pp. 1778-1783 Type of Manuscript: Special Section PAPER (Special Issue on Millimeter-wave Short-range Application Systems Technology) Category: Keyword: multibeam antenna, Butler matrix, millimeter-wave, slot-coupled hybrid, bi-layer,
	Summary \| Full Text:PDF

A Planar Sector Antenna for Indoor High-Speed Wireless Communication Systems Kazuhiro UEHARA Tomohiro SEKI Kenichi KAGOSHIMA
Publication: IEICE TRANSACTIONS on Communications Publication Date: 1996/12/25 Vol. E79-B No. 12 pp. 1773-1777 Type of Manuscript: Special Section PAPER (Special Issue on Millimeter-wave Short-range Application Systems Technology) Category: Keyword: sector antenna, phased array, multi-beam antenna, millimeter-wave communication,
	Summary \| Full Text:PDF