Search Results - "Tomura, Takashi"

A 38 dB Gain, Low-Loss, Flat Array Antenna for 320-400 GHz Enabled by Silicon-on-Insulator Micromachining by Gomez-Torrent, Adrian, Tomura, Takashi, Kuramoto, Wataru, Hirokawa, Jiro, Watanabe, Issei, Kasamatsu, Akifumi, Oberhammer, Joachim

“…Two high-gain flat array antenna designs operating in the 320-400 GHz frequency range are reported in this article. The two antennas show the measured gains of…”
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Stretchable-Substrate-Impregnated Fabric: Deployable Reflectarray Antennas for CubeSats by Machida, Masato, Tomura, Takashi, Sakamoto, Hiraku, Fukao, Tomohiro

“…This paper proposes a stretchable-substrate-impregnated fabric for deployable high-gain antenna for small satellites. Constellations of small satellites offer…”
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Effective Design of an Array of Coupling Slots With a Reflection-Canceling Wall for a Parallel-Plate Slot Array Antenna by Wang, Tianyu, Tomura, Takashi, Hirokawa, Jiro

“…This paper presents an effective design of an array of coupling slots with reflection-canceling walls for uniform excitation of a parallel-plate slot array…”
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A Wideband and High-Gain All-Metallic Perpendicular-Corporate-Fed Multi-Layered Parallel-Plate Slot Array Antenna by Ji, Shuang, Hirokawa, Jiro, Tomura, Takashi

“…An all-metallic multi-layered parallel-plate slot array antenna operated in the 60-GHz band with wide impedance bandwidth and high-gain characteristics is…”
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Mixed-mode RF reflectometry of quantum dots for reduction of crosstalk effects by Machida, Masato, Mizokuchi, Raisei, Yoneda, Jun, Tomura, Takashi, Kodera, Tetsuo

“…Abstract RF reflectometry is a promising technique for spin qubit readout, suitable for large-scale integrated qubit systems by combination with multiplexing…”
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A Center-Fed Dual-Polarized Parallel-Plate Waveguide Slot Array Antenna Based on a Feeding Waveguide with Centered Longitudinal Feeding Slots by Xiong, Huanqian, Hirokawa, Jiro, Tomura, Takashi

“…A dual-polarized paralle-plate waveguide slot array antenna operating at 24.5 GHz band is proposed in this paper. The antenna architecture consists of two…”
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An Inverted-L Monopole Array With High Beam Coverage for Antenna-in-Package Modules at the 151.5-164 GHz Band by Hernandez-Escobar, Alberto, Tomura, Takashi, Hasaba, Ryosuke, Taneda, Hiroshi, Watanabe, Issei

“…An inverted-L monopole radiating element is proposed for antenna-in-package modules at the 151.5-164 GHz band. Its radiation pattern is half-isotropic and is…”
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Development and Performance Evaluation of Small SAR System for 100-kg Class Satellite by Pyne, Budhaditya, Saito, Hirobumi, Akbar, Prilando Riziki, Hirokawa, Jiro, Tomura, Takashi, Tanaka, Koji

“…This article shows development and performance evaluation of a MicroX-SAR demonstration satellite, scheduled to be launched in 2020 for synthetic aperture…”
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Significance of 3U CubeSat OrigamiSat-1 for space demonstration of multifunctional deployable membrane by Ikeya, Kosuke, Sakamoto, Hiraku, Nakanishi, Hiroki, Furuya, Hiroshi, Tomura, Takashi, Ide, Ryoga, Iijima, Ryo, Iwasaki, Yohei, Ohno, Keigo, Omoto, Keisuke, Furuya, Takashi, Hayashi, Teruaki, Kato, Masaki, Koide, Sae, Kurosaki, Madoka, Nakatsuka, Yuki, Okuyama, Shigeaki, Kashiyama, Reo, Nakamura, Junya, Nio, Wataru, Tsunemitsu, Tsubasa, Yamazaki, Yutaka, Taga, Keisuke, Hohmann, Britta, Amamoto, Towa, Chubachi, Takaomi, Tamura, Sho, Okada, Hideaki, Watanabe, Akihito, Kawabata, Nobuyoshi, Hori, Toshiyuki, Ito, Hiroaki, Kuratomi, Takeshi, Shimoda, Yuya, Hidaka, Nana, Watanabe, Kazuki, Torisaka, Ayako, Yamazaki, Masahiko

“…The 3U CubeSat OrigamiSat-1 has been developed and launched into orbit in January 2019 to demonstrate a “multifunctional” membrane deployable space structure…”
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Proof-of-Concept on Misalignment Compensation for 5.8-GHz-Band Reflectarray Antennas by Varactor Diodes by Omoto, Keisuke, Tomura, Takashi, Sakamoto, Hiraku

“…Membrane reflectarray antennas with flexible support structures realize low weight and low stowage volume. However, deformation of the reflectarray membrane…”
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8 × 2-Element 60-GHz-Band Circularly Polarized Post-Wall Waveguide Slot Array Antenna Loaded With Dipoles by Tomura, Takashi, Saito, Yuta, Hirokawa, Jiro

“…In this paper, an <inline-formula> <tex-math notation="LaTeX">8\times 2 </tex-math></inline-formula>-element 60-GHz band circularly polarized post-wall…”
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Optimal Adjacent Output Phase Difference Assignments in One-Dimensional Parallel Switching Matrices With Four Beams by Wu, Shengjia, Hirokawa, Jiro, Tomura, Takashi, Fonseca, Nelson J. G.

“…This article provides for the first time a detailed discussion of the optimal assignment of adjacent output phase differences in terms of matrix performance…”
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A Compact Multi-Beam End-Fire Circularly Polarized Septum Antenna Array for Millimeter-Wave Applications by Cheng, Xiaohe, Yao, Yuan, Tomura, Takashi, Hirokawa, Jiro, Yu, Tao, Yu, Junsheng, Chen, Xiaodong

“…In this paper, a novel circularly polarized end-fire septum antenna based on substrate-integrated-waveguide (SIW) is proposed in the 60-GHz band. By…”
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A Two-dimensional 6×4-way Hollow Waveguide Beam-switching Matrix by Li, Qi, Hirokawa, Jiro, Tomura, Takashi, Takahashi, Yuta, Kita, Naoki, Fonseca, Nelson J. G.

“…This paper presents a design of a two-dimensional (2-D) 6×4-way hollow waveguide beam-switching matrix working at 28.25 GHz, with a fractional bandwidth of…”
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Millimeter-Wave Frequency Beam Scanning Array With a Phase Shifter Based on Substrate-Integrated-Waveguide by Cheng, Xiaohe, Yao, Yuan, Tomura, Takashi, Hirokawa, Jiro, Yu, Tao, Yu, Junsheng, Chen, Xiaodong

“…In this paper, a millimeter-wave multi-folded frequency-dependent progressive phase shifter based on substrate-integrated-waveguide (SIW) is proposed. The…”
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Novel Unmanned Aerial Vehicle-Based Line-of-Sight MIMO Configuration Independent of Transmitted Distance Using Millimeter Wave by Matsumura, Naoki, Nishimori, Kentaro, Taniguchi, Ryotaro, Hiraguri, Takefumi, Tomura, Takashi, Hirokawa, Jiro

“…Recently, the millimeter-wave band has been used in outdoor wireless communications to improve the frequency utilization efficiency. In this study, we propose…”
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A 45$^{\circ}$ Linearly Polarized Hollow-Waveguide 16$\,\times$16-Slot Array Antenna Covering 71–86 GHz Band by Tomura, Takashi, Hirokawa, Jiro, Hirano, Takuichi, Ando, Makoto

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Laser-Drilled All-Dielectric Huygens' Transmit-Arrays as 120 GHz Band Beamformers by Emara, Mohamed K., Stuhec-Leonard, Sonya K., Tomura, Takashi, Hirokawa, Jiro, Gupta, Shulabh

“…An all-dielectric Huygens' transmit-array is proposed and experimentally demonstrated in the 120-GHz-band. The proposed transmit-array is fabricated using a…”
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A 20-GHz-Band 64\times64 Hollow Waveguide Two-Dimensional Butler Matrix by Tomura, Takashi, Kim, Dong-Hun, Wakasa, Masahiro, Sunaguchi, Yuki, Hirokawa, Jiro, Nishimori, Kentaro

“…In this paper, a 20-GHz-band 64 x 64 hollow waveguide Butler matrix is proposed. By using two-plane short slot couplers and a modified diagram, a short-axis…”
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Connecting Networks for Two-Dimensional Butler Matrices Generating a Triangular Lattice of Beams by FONSECA, NELSON J. G., GOMANNE, SOPHIE-ABIGAEL, CASTILLO-TAPIA, PILAR, QUEVEDO-TERUEL, OSCAR, TOMURA, TAKASHI, HIROKAWA, JIRO

“…Connecting networks for two-dimensional beamforming matrices are discussed. They provide a suitable interconnection between the output ports of a Butler matrix…”
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