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Yoshihiko Konishi

Researcher at Hiroshima Institute of Technology

Publications -  161
Citations -  1299

Yoshihiko Konishi is an academic researcher from Hiroshima Institute of Technology. The author has contributed to research in topics: Antenna (radio) & Antenna measurement. The author has an hindex of 18, co-authored 160 publications receiving 1183 citations. Previous affiliations of Yoshihiko Konishi include Mitsubishi Electric & Mitsubishi.

Papers
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Journal ArticleDOI

Fast Measurement Technique for Phased Array Calibration

Tomohiro Takahashi, +4 more
- 09 Jul 2008 - 
TL;DR: Fast and accurate measurements can be realized by the proposed method because the electric fields of multiple elements can be obtained simultaneously and no phase measurements are required, and it can be easily applied to the on-board diagnostics and re-calibration in the operating phased array antenna systems.
Journal ArticleDOI

Dual-band-rejection filter for distortion reduction in RF transmitters

H. Uchida, +8 more
- 08 Nov 2004 - 
TL;DR: In this paper, a dual-band-rejection filter (DBRF) is proposed to make two closely spaced rejection bands and a passband between them, with lower loss than a bandpass filter having the same number of resonators and the same frequency selectivity just around the passband.
Proceedings ArticleDOI

Bandpass Directional Couplers with Electromagnetically-Coupled Resonators

Hiromitsu Uchida, +3 more
TL;DR: In this article, the authors presented compact 90-and 180-degree directional couplers incorporating bandpass characteristics, which can integrate a bandpass filter and a power-divider/combiner in an RF transceiver, resulting in its miniaturization.
Journal ArticleDOI

Dual-band-rejection filter for distortion reduction in RF transmitters

H. Uchida, +8 more
TL;DR: In this article, a dual-band rejection filter (DBRF) is proposed with its circuit synthesis procedure and an example of its realization with dielectric resonators at L-band.
Patent

Multi-frequency antenna device and multi-frequency array antenna device using multi-frequency sharing antenna

Shigeru Chikaoka, +9 more
TL;DR: In this article, the authors proposed a method to provide a device which can be miniaturized in height/width directions by providing plural logarithm period dipole parts excited from two parallel lines transmitting radio waves from a micro strip line in accordance with respective necessary frequency bands.