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 Conference Papers (Available on Advance Programs)  (Sort by: Date Descending)
 Results 21 - 40 of 221 [Previous]  /  [Next]  
Committee Date Time Place Paper Title / Authors Abstract Paper #
AP 2022-10-19
12:20
Gifu GIFU CITY CULTURE CENTER
(Primary: On-site, Secondary: Online)
[Poster Presentation] A study of a circularly arranged hollow-waveguide narrow-wall slot array antenna in 150 GHz band
Rikako Yamaguchi, Jiro Hirokawa, Takashi Tomura (Tokyo Tech) AP2022-118
 [more] AP2022-118
pp.101-104
AP 2022-10-19
12:20
Gifu GIFU CITY CULTURE CENTER
(Primary: On-site, Secondary: Online)
[Poster Presentation] Research of Millimeter-wave Band Waveguide Slot Array Antenna for Increasing Transmission Capacity in Two-dimensional Quadrature Multiplex Transmission in Rectangular Coordinate System
Masashi Fujishiro, Jiro Hirokawa, Takashi Tomura (TokyoTech) AP2022-119
One type of MIMO is rectangular-coordinate two-dimensional multiplex transmission (ROM transmission). In this study, we ... [more] AP2022-119
pp.105-108
MIKA
(3rd)
2022-10-15
13:30
Niigata Niigata Citizens Plaza
(Primary: On-site, Secondary: Online)
[Invited Talk] Numerical design of one-dimensional switching matrices with an arbitrary number of beams and application to millimeter-wave two-dimensional ones
Jiro Hirokawa (Tokyo Institute of Technology)
 [more]
AP, MW
(Joint)
2022-09-16
12:00
Ehime The Museum of Art, EHIME
(Primary: On-site, Secondary: Online)
Design of a 150GHz-Band Reflector OmnidirectionalAntenna Using a Circular TE11-TM01 Mode Converter
Riki Yanagisawa, Jiro Hirokawa, Takashi Tomura (Tokyo Tech) AP2022-88
An omnidirectional antenna is required for the measurement of radio propagation characteristics in the terahertz band. I... [more] AP2022-88
pp.96-99
AP, MW
(Joint)
2022-09-16
16:40
Ehime The Museum of Art, EHIME
(Primary: On-site, Secondary: Online)
Design of Feed Circuit for Post-Wall Waveguide Slot Array Antenna Irradiating Square Region
Yuto Katsura, Takashi Tomura, Jiro Hirokawa (Tokyo Tech) AP2022-92
We design a waveguide slot array antenna with a square irradiation area that enables communication to all four corners f... [more] AP2022-92
pp.115-118
AP, SANE, SAT
(Joint)
2022-07-27
16:30
Hokkaido Asahikawa Taisetsu Crystal Hall
(Primary: On-site, Secondary: Online)
SAR Observation with High Resolution, Wide Swath by Deployable Corporate-Fed Slot Array Antenna
Kosei Ishimura (Waseda Univ./Tokyo Inst. Tech.), Kosei Ishimura (Waseda Univ.), Jiro Hirokawa (Tokyo Inst. Tech.) AP2022-38 SANE2022-23 SAT2022-19
We have developed a synthetic aperture radar system with 1m ground resolution compatible with 100kg small satellite. The... [more] AP2022-38 SANE2022-23 SAT2022-19
pp.22-27(AP), pp.6-11(SANE), pp.12-17(SAT)
AP, WPT
(Joint)
2022-01-21
12:40
Tottori Kenmin-Fureai-Kaikan
(Primary: On-site, Secondary: Online)
Design of a Circularly-polarized Crossed-slot Square-Arrangement Array Antennas on Alternating-phase Feed Parallel-plate Waveguide
Yuta Ishikawa, Takashi Tomura, Jiro Hirokawa (Tokyo Tech) AP2021-149
When adjacent rectangular waveguides are alternating-phase fed, the field distribution is maintained even though the str... [more] AP2021-149
pp.80-85
AP, WPT
(Joint)
2022-01-21
13:05
Tottori Kenmin-Fureai-Kaikan
(Primary: On-site, Secondary: Online)
Analysis and design of a circularly-polarized element on a parallel plate waveguide with perpendicular corporate-feed
Hiroki Nishimoto, Takashi Tomura, Jiro Hirokawa (Tokyo Tech) AP2021-150
In a conventional corporate-feed waveguide circularly polarized slot array antenna, plural thin metal plates are stacked... [more] AP2021-150
pp.86-91
MWP 2021-11-26
17:25
Online Online 60-GHz-band Spatial Duplex Radio over Fiber by Rectangular-Coordinate Two-Dimensional Orthogonal Multiplexing
Takashi Tomura, Jiro Hirokawa (Tokyo Tech), Muhsin Ali, Guillermo Carpintero (UC3M) MWP2021-36
In this paper, we demonstrate rectangular-coordinate two-dimensional orthogonal multiplexing (ROM) using a 60-GHz wavegu... [more] MWP2021-36
pp.32-36
AP 2021-10-07
13:00
Online Online [Poster Presentation] Study of Square Region Irradiation Waveguide Slot Array Antenna
Yuto Katsura, Takashi Tomura, Jiro Hirokawa (Tokyo Tech) AP2021-75
A uniformly-excited 8×2-element post-wall waveguide slot array antenna consists of a feed waveguide, slots on a radiatin... [more] AP2021-75
pp.33-36
AP 2021-10-07
13:00
Online Online [Poster Presentation] Design of a Circularly Polarized Slot Array on a Parallel-plate Waveguide using Non-inclined Slots
Yuki Tomori, Tianyu Wang, Tomura Takashi, Jiro Hirokawa (Tokyo Tech) AP2021-76
A circularly polarized parallel-plate slot array antennas are expected to be applied in various fields due to their simp... [more] AP2021-76
pp.37-41
AP 2021-10-07
14:25
Online Online [Poster Presentation] Study of mode converters for feeding an omnidirectional antenna in 300GHz-band
Riki Yanagisawa, Takashi Tomura, Jiro Hirokawa (Tokyo Tech) AP2021-88
An omnidirectional antenna is required for the measurement of radio propagation characteristics in the terahertz band. T... [more] AP2021-88
pp.74-77
AP 2021-10-07
14:25
Online Online [Poster Presentation] A Study on Antenna Efficiency and Bandwidth of Terahertz Band Partially Parallel-Fed Waveguide Slot Arrays
Yoshiki Hara, Jiro Hirokawa, Takashi Tomura (Tokyo Tech) AP2021-90
In the corporate feed of a waveguide slot array antenna, each element is fed with an equal-length line, which increases ... [more] AP2021-90
pp.82-88
SANE 2021-05-13
14:30
Online Online Synthetic Aperture Radar Compatible with 100kg Class Satellite and Its Demonstration in Orbit
Hirobumi Saito (Waseda Univ.), Koji Tanaka, Makoto Mita (ISAS/JAXA), Prilando Rizki Akbar, Budhaditya Pyne, Masato Tanaka, Hiromi Watanabe, Naoto Onodera, Ichitaro Arisaka, Toshihiro Obata (Synspective), Kosei Ishimura (Waseda Univ.), Jiro Hirokawa (Tokyo Inst.Tech.) SANE2021-7
Institute of Space and Astronautical Science(ISAS,JAXA) has developed synthetic Aperture Radar (SAR) system that is comp... [more] SANE2021-7
pp.38-43
MW, AP
(Joint)
2020-09-24
12:50
Online Online [Poster Presentation] Bandwidth Enhancement of Waveguide Coupler by Changing the Cross-Section of the Coupling Region in the Axial Direction
Shota Yamakawa, Takashi Tomura, Jiro Hirokawa (Tokyo tech) AP2020-43
We have a problem of narrow bandwidth in the waveguide two-plane coupler. The two-plane coupler integrates the functions... [more] AP2020-43
pp.57-61
MW, AP
(Joint)
2020-09-24
13:50
Online Online [Poster Presentation] Excitation by Metal Posts of a Square Arrangement of Slot Antennas in Alternating-Phase Feed Parallel-Plate Waveguide
Yuta Ishikawa, Takashi Tomura, Jiro Hirokawa (Tokyo Tech) AP2020-44
A series-fed waveguide slot array antenna with an alternating-phase feed can be considered as a parallel plate waveguide... [more] AP2020-44
pp.62-65
MW, AP
(Joint)
2020-09-24
13:50
Online Online [Poster Presentation] Control of the reception level using the millimeter-wave band waveguide slot array installed on the side in the touchless ticket gate
Mizuki Kurose, Takashi Tomura, Jiro Hirokawa (Tokyo Tech) AP2020-45
One of the touchless ticket gates is a system in which an antenna on the ceiling of the ticket gate radiates a millimete... [more] AP2020-45
pp.66-70
MW, AP
(Joint)
2020-09-24
13:50
Online Online [Poster Presentation] A Study of a Multi-layer Circularly Polarized Element for a Waveguide Corporate-feed Array
Hiroki Nishimoto, Takashi Tomura, Jiro Hirokawa (Tokyo Tech) AP2020-48
A 60-GHz band corporate-feed waveguide slot array has been fabricated by diffusion bonding of laminated thin metal plate... [more] AP2020-48
pp.75-78
MWP 2020-05-28
15:55
Online Online Transmission control of 120-GHz-band SRR bandstop filter
Akihiko Hirata, Koichiro Itakura (CIT), Takashi Tomura, Jiro Hirokawa (TITECH), Issei Watanabe, Norihiko Sekine, Akifumi Kasamatsu (NICT) MWP2020-5
 [more] MWP2020-5
pp.23-26
AP 2020-03-26
14:30
Fukui Fukui College
(Cancelled but technical report was issued)
Experimental evaluation in outdoor environment at 66 GHz band by LoS-MIMO configuration independent transmit distance
Kentaro Nishimori, Naoki Matsumura, Ryotaro Taniguchi (Niigata Univ.), Takefumi Hiraguri (NIT), Takashi Tomura, Jiro Hirokawa (TIT) AP2019-200
 [more] AP2019-200
pp.17-22
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