| Presentation | 2017-09-21 High Frequency Analog Beam Forming by Frequency Control of Local Oscillator Atsushi Fukuda, Hiroshi Okazaki, Shoichi Narahashi, |
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| PDF Download Page |  PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | This paper proposes a novel configuration for a phased array antenna system (PAS) that achieves ultra-broadband transmission using millimeter waves for 5G. Since it is expected to employ an unprecedented number of antennas, the PAS is required to be compact and cost effective. Generally, the PAS employs phase shifters that are applied to the IF or RF transmission signal lines for beam forming. However, the phase shifter limits the bandwidth of the transmission signal due to the required accuracy of the phase adjustment. A PAS employing phase-controlled RF carriers is a promising configuration for broadband transmission. In the proposed configuration, RF carriers are obtained by frequency upconvertion of the phase-controlled local signals with a lower frequency. To confirm the feasibility of the proposed configuration, a two-branch PAS transmitter with phase-controlled RF carriers is configured and tested. Measurement results show that the phase-controlled local signals that have a frequency lower than that of the RF carriers can be used to control the phase difference between the transmitted RF signals. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | 5G / Ultra-broadband transmission / array antenna / Beam forming |
| Paper # | MW2017-68 |
| Date of Issue | 2017-09-14 (MW) |
| Conference Information | |
| Committee | AP / MW |
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| Conference Date | 2017/9/21(2days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | Saitama University |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | Microwave, Millimeter wave, Measurement, Antennas and Propagation |
| Chair | Jiro Hirokawa(Tokyo Tech.) / Masahiro Muraguchi(TUC) |
| Vice Chair | Ryo Yamaguchi(SoftBank) / Yoshinori Kogami(Utsunomiya Univ.) / Hiroshi Okazaki(NTTdocomo) / Kenichi Tajima(Mitsubishi Electric) |
| Secretary | Ryo Yamaguchi(NTT DoCoMo) / Yoshinori Kogami(Saitama Univ.) / Hiroshi Okazaki(Tokyo Inst. of Tech.) / Kenichi Tajima(HITACHI) |
| Assistant | Nobuyasu Takemura(Nippon Inst. of Tech.) / Satoshi Yamaguchi(Mitsubishi Electric) / Satoshi Ono(Univ. of Electro-Comm.) / Mizuki Motoyoshi(Tohoku Univ.) |
| Paper Information | |
| Registration To | Technical Committee on Antennas and Propagation / 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) | High Frequency Analog Beam Forming by Frequency Control of Local Oscillator |
| Sub Title (in English) | |
| Keyword(1) | 5G |
| Keyword(2) | Ultra-broadband transmission |
| Keyword(3) | array antenna |
| Keyword(4) | Beam forming |
| 1st Author's Name | Atsushi Fukuda |
| 1st Author's Affiliation | NTT DOCOMO, INC.(NTT DOCOMO) |
| 2nd Author's Name | Hiroshi Okazaki |
| 2nd Author's Affiliation | NTT DOCOMO, INC.(NTT DOCOMO) |
| 3rd Author's Name | Shoichi Narahashi |
| 3rd Author's Affiliation | NTT DOCOMO, INC.(NTT DOCOMO) |
| Date | 2017-09-21 |
| Paper # | MW2017-68 |
| Volume (vol) | vol.117 |
| Number (no) | MW-216 |
| Page | pp.pp.1-4(MW), |
| #Pages | 4 |
| Date of Issue | 2017-09-14 (MW) |