Search Results - "Iigusa, Kyoichi"

Wideband strip antenna surrounding a ground plate by Iigusa, Kyoichi, Sawada, Hirokazu, Matsumura, Takeshi, Kojima, Fumihide

“…A wideband planar antenna, which is composed of a ground plate and a strip surrounding the plate, is proposed. Wideband impedance matching with fractional…”
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Wideband monopole antenna tightly aligned to the ground plate by Iigusa, Kyoichi, Sawada, Hirokazu, Kojima, Fumihide, Yano, Hiroyuki

“…The authors propose a wideband monopole antenna that is tightly aligned to one edge of its ground plate. Wideband impedance matching with fractional bandwidth…”
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Approximate Relations of Impedance of Dipoles Independent of Their Arrangement by Iigusa, Kyoichi, Harada, Hiroshi

“…We derive the approximate relations of impedance Z of dipoles of approximately half a wavelength or shorter in length by introducing α as the ratio of the…”
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Approximate Relations of Admittance for Symmetrically Arranged Dipoles by Iigusa, Kyoichi, Sawada, Hirokazu, Kojima, Fumihide

“…We previously proposed an approximate relation between admittance <inline-formula> <tex-math notation="LaTeX">Y_{mn} </tex-math></inline-formula> and…”
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Accuracy improvement of relational expressions regarding effective length vector of a dipole and expansion to V‐shaped dipole by Iigusa, Kyoichi, Yamamoto, Shin‐ichi, Miura, Amane, Tsuji, Hiroyuki

“…The accuracy of formulas for calculating le(0) and α is improved, which are parameters representing the effective length vector of a dipole, from the length L…”
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Gain Enhancement of H-Plane Sectoral Post-Wall Horn Antenna by Connecting Tapered Slots for Millimeter-Wave Communication by Iigusa, K., Li, K., Sato, K., Harada, H.

“…We propose a millimeter-wave antenna to serve as an element antenna for a multi-sector switched-beam antenna, which can be fed by a post-wall waveguide…”
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Bandwidth enhancement of bent monopole antenna by closely locating a slotted plate by Iigusa, K., Harada, H.

“…We propose locating a slotted conductor plate in close proximity to a bent monopole antenna in order to enhance the bandwidth, and clarify that impedance…”
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Antenna Composition and Technology for Cognitive Wireless Communications by Iigusa, Kyoichi, Harada, Hiroshi

“…Antenna composition that can be applied for cognitive wireless communications is classified into switching antennas, wideband antennas and tunable antennas in…”
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Antenna Composition and Technology for Cognitive Wireless Communications: TeleHomeCare and Strategic Vision for Future Wireless Communication by IIGUSA, Kyoichi, HARADA, Hiroshi

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Proposal and Design of a Slim Electronically Steerable Parasitic Array Radiator Antenna in the 2.4-GHz Band by Iigusa, Kyoichi, Harada, Hiroshi, Kato, Shuzo

“…We propose an electronically steerable parasitic array radiator antenna that is about 96% smaller than a conventional one. The antenna can shape a beam with a…”
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Input Impedance of Radiation Efficiency Deterioration State by IIGUSA, Kyoichi, SAWADA, Hirokazu, MIURA, Amane, TSUJI, Hiroyuki

“…The factors of radiation efficiency and impedance matching were investigated for a variable reactor-loaded antenna. It was found that when the conductivity…”
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Reactance Dependence of Radiation Efficiency and Impedance Matching of A Wrapped Loop Antenna by Iigusa, Kyoichi, Sawada, Hirokazu, Miura, Amane, Tsuji, Hiroyuki, Harada, Hiroshi

“…Instead of optimizing dimensions of an antenna, variable reactors are loaded on the antenna and the reactance values are optimized to achieve desired…”
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Periodically Loaded Straight Wires for Radio Wave Transmission Control by Iigusa, K, Harada, H, Kato, S, Hirokawa, J, Ando, M

“…Calculating current distributions along conducting straight wires reveals that the electric influence of the wires is more effectively reduced by loading…”
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A wideband planar monopole antenna set perpendicularly beside a ground plate by Iigusa, Kyoichi, Harada, Hiroshi

“…We investigate a planar monopole antenna fed from the side of a perpendicular ground plate and show that impedance matching is attainable at a fractional…”
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Experimental Verification of an Approximate Admittance Equation for Center-Fed Dipoles Arranged Parallel Beside Each Other and Estimation of Its Effective Frequency Range by Iigusa, Kyoichi, Sawada, Hirokazu, Matsumura, Takeshi, Kojima, Fumihide, Harada, Hiroshi

“…A proposed approximate equation between admittance of a set of dipoles and that of the same set of dipoles with one removed is experimentally examined in the…”
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Experimental Proof of Electrically Invisible State of Inductively Loaded Dipole and Proposal of Electrically Invisible Meander-Lines by Iigusa, K., Sawaya, T., Taromaru, M., Ohira, T., Komiyama, B.

“…We examine that an inductively loaded dipole becomes electrical invisible showing that the influence on a nearby antenna's input impedance and on its radiation…”
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Extraction of propagation parameters by single feed antennas loaded with variable reactances by Iigusa, Kyoichi, Harada, Hiroshi

“…A method to extract the propagation parameters by reactance control of single feed antennas loaded with variable reactances is described…”
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Wideband T-shaped cross-section monopole antenna fed sideward from a ground plate by Iigusa, Kyoichi, Harada, Hiroshi

“…Miniaturization of a rectangular monopole antenna fed sideward from a ground plate by modifying its cross-sectional shape was investigated. It was found that…”
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Degradation factors of short-distance wireless power transmission and allowable variation of receiving circuit parameters by Iigusa, Kyoichi, Harada, Hiroshi

“…Wireless transmission efficiency is deteriorated by radiation and ohmic loss even when the receiving circuit is optimally controlled and the transmitting…”
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A wideband circularly polarized printed dipole antenna composed of right-angled trapezoids by Iigusa, Kyoichi, Kojima, Fumihide

“…We propose a printed dipole antenna by which the reflection coefficient and axial ratio are maintained at less than -10 dB and 3 dB, respectively in a wide…”
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