| Presentation | 2018-11-15 Advanced Mode Unity Using Loop Array Proximate to Reflector for OAM Communication Ryohei Yamagishi, Hiroto Otsuka, Akira Saitou, Hiroshi Suzuki, Ryo Ishikawa, Kazuhiko Honjo, |
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| PDF Download Page |  PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | Advanced 4-channel multiplexing performance for short- and long-range orbital-angular-momentum (OAM) is demonstrated using circular loop arrays proximate to a planar reflector, where the distance between the array and the reflector is 2 mm to improve the mode unity. To impedance-match measured low input impedances, baluns tailored to each antenna were designed. With these fabricated modules, consisting of a 4-element loop antenna array, baluns and a planar reflector, satisfactory return losses are obtained. In addition, remarkably suppressed transmissions among the transmitting antennas are obtained in favor of the advanced mode unity; the transmission is less than -33.2 dB at 5.5 GHz. With these modules, performance for short-range communication is estimated. The transmission between antennas of the same radius, corresponding to the signal transmission, is always the maximum for each transmitting antenna. The measured transmission isolation, corresponding to the ratio of the signal to the interference, is as large as 21.9 dB. We confirmed that different 64 QAM signals are input to two antennas respectively and that the signals can be separated without signal processing. Performance for long-range communication is also estimated by using paraboloids and measuring equipment for accurate alignments. The measured transmission between antennas of the same radius is also the maximum, and an excellent measured transmission isolation of 23.4 dB is obtained at 5.5 GHz. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | Loop antenna / Orbital angular momentum / Multiplexing / reflector plane |
| Paper # | MW2018-102 |
| Date of Issue | 2018-11-08 (MW) |
| Conference Information | |
| Committee | MW |
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| Conference Date | 2018/11/15(2days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | Fukue Cultural Hall |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | Microwave Technologies |
| Chair | Masahiro Muraguchi(TUS) |
| Vice Chair | Yoshinori Kogami(Utsunomiya Univ.) / Hiroshi Okazaki(NTT DOCOMO) / Kenichi Tajima(Mitsubishi Electric) |
| Secretary | Yoshinori Kogami(HITACHI) / Hiroshi Okazaki(Utsunomiya Univ.) / Kenichi Tajima |
| Assistant | Mizuki Motoyoshi(Tohoku Univ.) / Satoshi Yoshida(Kagoshima Univ.) |
| Paper Information | |
| Registration To | Technical Committee on Microwaves |
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| Language | JPN |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Advanced Mode Unity Using Loop Array Proximate to Reflector for OAM Communication |
| Sub Title (in English) | |
| Keyword(1) | Loop antenna |
| Keyword(2) | Orbital angular momentum |
| Keyword(3) | Multiplexing |
| Keyword(4) | reflector plane |
| 1st Author's Name | Ryohei Yamagishi |
| 1st Author's Affiliation | The University of Electro-Communications(UEC) |
| 2nd Author's Name | Hiroto Otsuka |
| 2nd Author's Affiliation | The University of Electro-Communications(UEC) |
| 3rd Author's Name | Akira Saitou |
| 3rd Author's Affiliation | The University of Electro-Communications(UEC) |
| 4th Author's Name | Hiroshi Suzuki |
| 4th Author's Affiliation | The University of Electro-Communications(UEC) |
| 5th Author's Name | Ryo Ishikawa |
| 5th Author's Affiliation | The University of Electro-Communications(UEC) |
| 6th Author's Name | Kazuhiko Honjo |
| 6th Author's Affiliation | The University of Electro-Communications(UEC) |
| Date | 2018-11-15 |
| Paper # | MW2018-102 |
| Volume (vol) | vol.118 |
| Number (no) | MW-308 |
| Page | pp.pp.53-57(MW), |
| #Pages | 5 |
| Date of Issue | 2018-11-08 (MW) |