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All Technical Committee Conferences (Searched in: All Years)
| Committee | Date Time | Place | Paper Title / Authors | Abstract | Paper # | |
| AP, RCS (Joint) |
2021-11-11 09:55 |
Nagasaki | NBC-Bekkan (Nagasaki) (Primary: On-site, Secondary: Online) |
Prototype Evaluation of Frequency Dispersive Phase Shifter for Dual Band Base Station Antenna Toshiki Soma, Keizo Cho (Chiba Inst. Tech.), Naobumi Michishita (National Defense Academy), Takayoshi Sasaki, Keisuke Sato, Ichiro Oshima (DKK), Hiroaki Nakabayashi (Chiba Inst. Tech.)  AP2021-110 |
Multi-band base station antennas have the problem that interference to adjacent areas increases in the low frequency ban... [more] | AP2021-110 pp.56-60 |
| AP, RCS (Joint) |
2021-11-12 10:20 |
Nagasaki | NBC-Bekkan (Nagasaki) (Primary: On-site, Secondary: Online) |
Orthogonal Polarized Antenna Using Wideband Halo Antenna Tomokazu Mizutani, Naobumi Michishita (NDA), Hiroshi Sato, Yoshio Koyanagi (Panasonic), Hisashi Morishita (NDA) AP2021-122 |
[more] | AP2021-122 pp.112-115 |
| AP, RCS (Joint) |
2021-11-12 11:20 |
Nagasaki | NBC-Bekkan (Nagasaki) (Primary: On-site, Secondary: Online) |
A Sidelobe Reduction for Dual Frequency and Polarization Reflectarray Hiroshi Hashiguchi, Naobumi Michishita, Hisashi Morishita (National Defense Academy), Hiromi Matsuno, Takuya Ohto, Masayuki Nakano (KDDI Research, Inc) AP2021-124 |
[more] | AP2021-124 pp.122-125 |
| MIKA (3rd) |
2021-10-29 10:30 |
Okinawa | (Primary: On-site, Secondary: Online) |
[Poster Presentation]
Planar Sleeve Antenna with Choke Structure Composed of Zeroth-Order Resonator Keisuke Sakakibara, Hiroshi Hashiguchi, Naobumi Michishita, Hisashi Morishita (National Defense Academy) |
A choke structure of the sleeve antenna is required to suppress the leakage current. However, the choke length is 1/4 wa... [more] | |
| MW, AP (Joint) |
2021-09-09 14:00 |
Online | Online | Matching Circuit Design of Frequency Dispersive Phase Shifter for Dual Band Base Station Antenna Toshiki Soma, Keizo Cho (Chiba Inst. Tech.), Naobumi Michishita (National Defense Academy), Takayoshi Sasaki, Keisuke Sato, Ichiro Oshima (DKK), Hiroaki Nakabayashi (Chiba Inst. Tech.) AP2021-56 |
In a base station antenna that shares multiple frequency bands, The direction of radiation is the same in the shared fre... [more] | AP2021-56 pp.1-5 |
| AP, SANE, SAT (Joint) |
2021-07-29 10:50 |
Online | Online | Planar Sleeve Antenna with Choke Structure Composed of Zeroth-Order Resonator Keisuke Sakakibara, Hiroshi Hashiguchi, Naobumi Michishita, Hisashi Morishita (National Defense Academy) AP2021-34 |
A choke structure is required to suppress the leakage current of the sleeve antenna. The miniaturized sleeve antenna has... [more] | AP2021-34 pp.61-64 |
| AP (2nd) |
2021-06-18 11:05 |
Online | Online | Measurement of Cylindrical Cloak by Controlling Arrangement Density of Multi-Layer Ceramic Capacitors Thanh Binh Nguyen, Hiroshi Hashiguchi, Naobumi Michishita, Hisashi Morishita (National Defense Academy), Teruki Miyazaki, Masato Tadokoro (Yokohama Rubber Co., Ltd) |
[more] | |
| AP | 2021-05-21 09:45 |
Online | Online | Mutual Coupling Reduction Between Dipole Antennas Using Mantle Cloak Thanh Binh Nguyen, Naobumi Michishita, Hisashi Morishita (National Defense Academy), Teruki Miyazaki, Masato Tadokoro (Yokohama Rubber Co., Ltd.) AP2021-10 |
Recently, systems such as mobile terminals and digital terrestrial television broadcasting, ITS, RFID are used in the UH... [more] | AP2021-10 pp.7-11 |
| AP (2nd) |
2020-12-10 09:35 |
Okinawa | Nobumoto Ohama Memorial Hall (Primary: On-site, Secondary: Online) |
Bistatic RCS Measurement of Dual Band and Dual Polarized Reflectarray Cong Oai Nguyen, Kazuya Matsubayashi, Naobumi Michishita, Hisashi Morishita (National Defense Academy), Hiromi Matsuno, Satoshi Ito, Takahiro Hayashi, Masayuki Nakano (KDDI Research) |
In the fifth generation wireless communication systems, high frequency band such as the 28 GHz is used to high data rate... [more] | |
| RCS, AP, UWT (Joint) |
2020-11-25 09:25 |
Online | Online | Mantle Cloak Antenna by Controlling Surface Reactance of Dielectric Loaded Dipole Antenna Thanh Binh Nguyen, Naobumi Michishita, Hisashi Morishita (National Defense Academy), Teruki Miyazaki, Masato Tadokoro (The Yokohama Rubber Co., Ltd.) AP2020-73 |
Recently, antennas for various systems are often placed in proximity in a narrow space with the miniaturization of wirel... [more] | AP2020-73 pp.1-6 |
| MW, AP (Joint) |
2020-09-25 09:00 |
Online | Online | A Study on Decoupling Method for Two PIFAs Using Parasitic Elements and Consideration by Characteristic Mode Analysis Quang Quan Phung, Naobumi Michishita (NDA), Hiroshi Sato, Yoshio Koyanagi (Panasonic), Hisashi Morishita (NDA) AP2020-59 |
Recently, Massive MIMO (Multiple-Input Multiple-Output) has been developed as an elemental technology for next-generatio... [more] | AP2020-59 pp.116-120 |
| AP (2nd) |
2020-08-24 14:35 |
Online | Online | Study on the Configuration of Slit on Bowtie Antenna for Miniaturization and Bandwidth Enhancement Hikaru Takizawa, Kazuya Matsubayashi, Naobumi Michishita, Hisashi Morishita (National Defense Academy) |
A folded bow-tie antenna is one of the small and wideband antennas. Miniaturization of the folded bow-tie antenna is p... [more] |
|
| AP | 2020-08-21 09:00 |
Online | Online | Dual Frequency and Polarized Reflectarray Using Cross Dipole and Patch Elements Cong Oai Nguyen, Naobumi Michishita, Hisashi Morishita (Natinal Defense Acad.), Hiromi Matsuno, Satoshi Ito, Takahiro Hayashi, Masayuki Nakano (KDDI Research) AP2020-23 |
[more] | AP2020-23 pp.1-4 |
| AP | 2020-05-21 13:00 |
Okinawa | Tiruru Okinawa (Naha-city) (Cancelled, technical report was not issued) |
Dual Frequency and Polarized Reflectarray Using Cross Dipole and Patch Elements Cong Oai Nguyen, Naobumi Michishita, Hisashi Morishita (National Defense Acad.), Hiromi Matsuno, Satoshi Ito, Takahiro Hayashi, Masayuki Nakano (KDDI Research) |
[more] | |
| AP | 2020-04-24 09:40 |
Mie | Jingu-kaikan (Ise) (Cancelled but technical report was issued) |
Improvement of Radiation Efficiency by Slot Elements on Metal Box Using Characteristic Mode Analysis Takumi Nishime, Naobumi Michishita, Hisashi Morishita (National Defense Academy) AP2020-4 |
[more] | AP2020-4 pp.19-22 |
| AP, WPT (Joint) |
2020-01-23 11:10 |
Kagawa | Sunport Hall Takamatsu | Triple Resonances Small Spherical Antenna with Parasitic Elements Hikaru Takizawa, Takahiro Hashimoto, Takumi Nishime, Nguyen Cong Oai, Naobumi Michishita, Hisashi Morishita (National Defense Academy) AP2019-156 |
A small spherical antenna is one of the electrically small antennas which has Q-factor approaching the lower bound on Q.... [more] | AP2019-156 pp.37-41 |
| AP, WPT (Joint) |
2020-01-23 16:00 |
Kagawa | Sunport Hall Takamatsu | Circular Folded Dipole Antenna for RFID Tag on Metallic Cylinder Takahiro Hashimoto, Naobumi Michishita, Hisashi Morishita (National Defense Academy), Takayuki Koshi (Komatsu Ltd.) AP2019-162 |
Recently, the use of UHF (Ultra-High Frequency) RFID (Radio-Frequency Identification) technology has been studied to man... [more] | AP2019-162 pp.67-72 |
| AP, RCS (Joint) |
2019-11-21 11:20 |
Saga | Saga Univ. | Equivalent circuit parameters reducing beam squint of left-handed leaky wave antenna Kazuki Terada, Keizo Cho, Hiroaki Nakabayashi (CIT), Naobumi Michishita (NDA), Ichiro Oshima (DKK) AP2019-122 |
A rod-like leaky wave antenna composed of CRLH transmission lines has been proposed as a base station antenna for small ... [more] | AP2019-122 pp.91-94 |
| AP, RCS (Joint) |
2019-11-22 10:55 |
Saga | Saga Univ. | [Tutorial Lecture]
Application of Meta-material to Base Station Antennas for Mobile Communication Systems Keizo Cho (Chiba Inst. Tech), Naobumi Michishita (National Defense Academy), Ichiro Oshima (DKK) AP2019-133 RCS2019-228 |
[more] | AP2019-133 RCS2019-228 pp.145-150(AP), pp.139-144(RCS) |
| AP | 2019-08-23 10:20 |
Hokkaido | Hokkai-Gakuen Univ. | A Fundamental Study of Impedance Variable Folded Monopole Antenna Using Switching Element Yuta Nakagawa, Oai Nguyen Cong, Naobumi Michishita, Hisashi Morishita (National Defense Academy) AP2019-65 |
In order to achieve an antenna with robustness to metal for closed space wireless communications, the impedance characte... [more] | AP2019-65 pp.97-100 |
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