| Presentation | 2019-06-20 Study on a VHF-band Small Loop Antenna with Adaptive Control of the Matching Circuit for Heart Rate Sensor Saki Wada, Kengo Nishimoto, Yasuhiro Nishioka, Naofumi Yoneda, |
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| PDF Download Page |  PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | Vital signs of the body are related to mental stress conditions. The variation of the R-R interval (peak-to-peak interval of the heartbeats), in particular, reflects mental stress. Non-contact detection using a Doppler sensor has been extensively studied for heart rate measurement. However, Doppler sensors are highly affected by reflections from surrounding objects or external noise, making accurate acquisition of the R-R interval difficult. To solve this problem, we propose the use of a low-radiation-efficiency VHF-band loop antenna to overcome the above problem. However, the input impedance of this antenna depends on the surrounding conditions relative to its location. In this study, we propose a sensor configuration to control the antenna impedance based on changes in the surrounding conditions, and demonstrate that the proposed configuration improves the sensor sensitivity. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | Heart rate sensor / Small antenna / Adaptive control / Variable matching circuit / VHF-band |
| Paper # | AP2019-18 |
| Date of Issue | 2019-06-13 (AP) |
| Conference Information | |
| Committee | AP |
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| Conference Date | 2019/6/20(1days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | Kikai-Shinko-Kaikan Bldg. |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | Antennas and Propagation |
| Chair | Qiang Chen(Tohoku Univ.) |
| Vice Chair | Satoru Kurokawa(AIST) |
| Secretary | Satoru Kurokawa(Mitsubishi Electric) |
| Assistant | Michitaka Ameya(AIST) |
| Paper Information | |
| Registration To | 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) | Study on a VHF-band Small Loop Antenna with Adaptive Control of the Matching Circuit for Heart Rate Sensor |
| Sub Title (in English) | |
| Keyword(1) | Heart rate sensor |
| Keyword(2) | Small antenna |
| Keyword(3) | Adaptive control |
| Keyword(4) | Variable matching circuit |
| Keyword(5) | VHF-band |
| 1st Author's Name | Saki Wada |
| 1st Author's Affiliation | Mitsubishi Electric Corporation(Mitsubishi Electric Corp.) |
| 2nd Author's Name | Kengo Nishimoto |
| 2nd Author's Affiliation | Mitsubishi Electric Corporation(Mitsubishi Electric Corp.) |
| 3rd Author's Name | Yasuhiro Nishioka |
| 3rd Author's Affiliation | Mitsubishi Electric Corporation(Mitsubishi Electric Corp.) |
| 4th Author's Name | Naofumi Yoneda |
| 4th Author's Affiliation | Mitsubishi Electric Corporation(Mitsubishi Electric Corp.) |
| Date | 2019-06-20 |
| Paper # | AP2019-18 |
| Volume (vol) | vol.119 |
| Number (no) | AP-91 |
| Page | pp.pp.19-22(AP), |
| #Pages | 4 |
| Date of Issue | 2019-06-13 (AP) |