Hiroshi Hirayama

17 papers Journal 17
YearRankTypeTitle / Venue / Authors
2024 J jnl
RF-DC conversion circuit using quadrature hybrid for complex maximum power point tracking.
IEICE Electron. Express
Kozaburo Tanahashi, Hiroshi Hirayama
2021 J jnl
Microstrip patch antenna with class-F load and DC block function for microwave power transfer.
IEICE Electron. Express
Takase Oshima, Shunya Ban, Hiroshi Hirayama
2018 J jnl
Numerical integration based on hyperfunction theory.
J. Comput. Appl. Math.
Hidenori Ogata, Hiroshi Hirayama
2017 J jnl
Review of Near-Field Wireless Power and Communication for Biomedical Applications.
IEEE Access
Han-joon Kim, Hiroshi Hirayama, Sanghoek Kim, Ki Jin Han, Rui Zhang, Ji-Woong Choi
2013 J jnl
An Investigation on Self-Resonant and Capacitor-Loaded Helical Antennas for Coupled-Resonant Wireless Power Transfer.
IEICE Trans. Commun.
Hiroshi Hirayama, Tomohiro Amano, Nobuyoshi Kikuma, Kunio Sakakibara
2012 J jnl
Automated Creation of Beamformer-Based Optimum DOA Estimation Algorithm Using Genetic Algorithm.
IEICE Trans. Commun.
Shunsuke Yoshimura, Hiroshi Hirayama, Nobuyoshi Kikuma, Kunio Sakakibara
2012 J jnl
Broadband Millimeter-Wave Microstrip Comb-Line Antenna Using Corporate Feeding System with Center-Connecting.
IEICE Trans. Commun.
Atsushi Kunita, Kunio Sakakibara, Kazuyuki Seo, Nobuyoshi Kikuma, Hiroshi Hirayama
2012 J jnl
Millimeter-Wave Microstrip-Line-Fed Broadband Waveguide Aperture Antennas.
IEICE Trans. Commun.
Shintaro Yano, Kunio Sakakibara, Nobuyoshi Kikuma, Hiroshi Hirayama
2011 J jnl
Channel Capacity Improvement in Short-Range MIMO Using Side and Back Reflectors.
IEICE Trans. Commun.
Hiroshi Hirayama, Gen Matsui, Nobuyoshi Kikuma, Kunio Sakakibara
2010 J jnl
A New Scheme to Avoid Null Zone for HF-Band RFID with Diversity Combining of Loop Antennas.
IEICE Trans. Commun.
Hiroshi Hirayama, Nobuyoshi Kikuma, Kunio Sakakibara
2010 J jnl
An Estimation Method of Poynting Vector with Near-Magnetic-Field Measurement.
IEICE Trans. Electron.
Hiroshi Hirayama, Nobuyoshi Kikuma, Kunio Sakakibara
2010 J jnl
Control of Power Dividing Ratio in Four-Way Power Divider for Feeding Microstrip Comb-Line Antenna.
IEICE Trans. Commun.
Morihiko Nanjo, Kunio Sakakibara, Nobuyoshi Kikuma, Hiroshi Hirayama
2010 J jnl
Narrow-Wall-Slotted Hollow-Waveguide Array Antenna Using Partially Parallel Feeding System in Millimeter-Wave Band.
IEICE Trans. Commun.
Yuki Ikeno, Kunio Sakakibara, Nobuyoshi Kikuma, Hiroshi Hirayama
2009 J jnl
A consideration of electro-magnetic-resonant coupling mode in wireless power transmission.
IEICE Electron. Express
Hiroshi Hirayama, Toshiyuki Ozawa, Yosuke Hiraiwa, Nobuyoshi Kikuma, Kunio Sakakibara
2009 J jnl
Microstrip patch array antenna coupled with parasitic patches using one dimensional EBG structures.
IEICE Electron. Express
Kazuoki Matsugatani, Kunio Sakakibara, Nobuyoshi Kikuma, Hiroshi Hirayama
2008 J jnl
Broadband Planar Antenna Combining Monopole Element with Electromagnetic Bandgap.
IEICE Trans. Electron.
Kazuoki Matsugatani, Kunio Sakakibara, Nobuyoshi Kikuma, Hiroshi Hirayama
2007 J jnl
Design and Optimization of Millimeter-Wave Microstrip-to-Waveguide Transition Operating over Broad Frequency Bandwidth.
IEICE Trans. Electron.
Yusuke Deguchi, Kunio Sakakibara, Nobuyoshi Kikuma, Hiroshi Hirayama