| Presentation | 2019-09-20 OTA Experiments on the Improved Angular Accuracy 32 x 32 MIMO/AOA Multi-functional Antenna Using Reactance Loading Nana Narukawa, Koichi Ogawa, |
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| PDF Download Page |  PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | We are currently developing a 32 × 32 MIMO beam steering array, aiming at establishing an over-10Gbps transmission rate, to create the 5G connected car architecture, such as automatic driving or safe cruise control of an automobile. Angle of arrival (AOA) function is embedded into the array to operate in corporation with the 32 × 32 MIMO, enabling the radiation beam of the MIMO antenna to be directed precisely to incoming waves from the target of communication. There is a certain difficulty in terms of achieving an AOA antenna with a high accuracy because the AOA antenna is surrounded by a number of MIMO subarrays, resulting in a strong electromagnetic (EM) mutual coupling. In this paper, a method of reducing the EM coupling between the AOA antenna and the 32 × 32 MIMO beam steering array is investigated by means of controlling reactive impedances loaded on the MIMO antenna. It is clarified that a small estimated angular error of 0.2 degrees is achieved by setting the load impedance to an optimum value. We further conducted an OTA experiment to confirm the analytical results. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | Angle of Arrival / EM coupling / 32×32 MIMO / Circular phased array / Connected car |
| Paper # | AP2019-74 |
| Date of Issue | 2019-09-12 (AP) |
| Conference Information | |
| Committee | MW / AP |
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| Conference Date | 2019/9/19(2days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | JAXA (Sagamihara) |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | Microwave, Millimeter wave, Antennas and Propagation |
| Chair | Yoshinori Kogami(Utsunomiya Univ.) / Qiang Chen(Tohoku Univ.) |
| Vice Chair | Tadashi Kawai(Univ. of Hyogo) / Kensuke Okubo(Okayama Prefectural Univ.) / Shintaro Shinjo(Mitsubishi Electric) / Satoru Kurokawa(AIST) |
| Secretary | Tadashi Kawai(Utsunomiya Univ.) / Kensuke Okubo(Fujitsu Labs.) / Shintaro Shinjo(Mitsubishi Electric) / Satoru Kurokawa(Tokyo Univ. of Agric. & Tech.) |
| Assistant | Satoshi Yoshida(Kagoshima Univ.) / Kyoya Takano(Tokyo Univ. of Science) / Michitaka Ameya(AIST) |
| Paper Information | |
| Registration To | Technical Committee on Microwaves / Technical Committee on Antennas and Propagation |
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| Language | JPN |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | OTA Experiments on the Improved Angular Accuracy 32 x 32 MIMO/AOA Multi-functional Antenna Using Reactance Loading |
| Sub Title (in English) | |
| Keyword(1) | Angle of Arrival |
| Keyword(2) | EM coupling |
| Keyword(3) | 32×32 MIMO |
| Keyword(4) | Circular phased array |
| Keyword(5) | Connected car |
| 1st Author's Name | Nana Narukawa |
| 1st Author's Affiliation | Toyama University(Toyama Univ.) |
| 2nd Author's Name | Koichi Ogawa |
| 2nd Author's Affiliation | Toyama University(Toyama Univ.) |
| Date | 2019-09-20 |
| Paper # | AP2019-74 |
| Volume (vol) | vol.119 |
| Number (no) | AP-203 |
| Page | pp.pp.25-30(AP), |
| #Pages | 6 |
| Date of Issue | 2019-09-12 (AP) |