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| Presentation | 2022-09-16 12:25 Bandwidth Enhancement of a Spherical Helix Antenna with Multi-Mode Excitation Takuma Shimada (MIT), Mina Nishie, Keisuke Noguchi (KIT), Keisuke Fujita (MIT)  AP2022-89 |
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| Abstract | (in Japanese) | (See Japanese page) |
| (in English) | We propose the electrically small spherical helix antenna (SHA) with a folded structure to achieve broadbanding by using the multi-mode excitation. It is revealed that the proposed antenna can achieve wideband characteistics for SHA with the close Q factor of the Chu limit. Good agreement of the impedance and the radiation pattern was observed between the numerical and the experimental results. It was shown that the proposed antenna radiating both TE and TM mode has the larger bandwidth compared with the result of conventional small antennas when the VSWR is equal or smaller than $2.5$. The realized bandwidth ratio is $18.7%$ when the antenna size is 0.08 of a wavelength. |
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| Keyword | (in Japanese) | (See Japanese page) |
| (in English) | small antenna / helix antenna / radiation efficiency / Q factor / spherical surface antenna / / / | |
| Reference Info. | IEICE Tech. Rep., vol. 122, no. 182, AP2022-89, pp. 100-105, Sept. 2022. | |
| Paper # | AP2022-89 | |
| Date of Issue | 2022-09-07 (AP) | |
| ISSN | Online edition: ISSN 2432-6380 | |
| Copyright and reproduction |
All rights are reserved and no part of this publication may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopy, recording, or any information storage and retrieval system, without permission in writing from the publisher. Notwithstanding, instructors are permitted to photocopy isolated articles for noncommercial classroom use without fee. (License No.: 10GA0019/12GB0052/13GB0056/17GB0034/18GB0034) | |
| Download PDF | AP2022-89 |
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| Conference Information | |
| Committee | AP MW |
| Conference Date | 2022-09-14 - 2022-09-16 |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | The Museum of Art, EHIME |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | Microwave, Millimeter wave |
| Paper Information | |
| Registration To | AP |
| Conference Code | 2022-09-AP-MW |
| Language | Japanese |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Bandwidth Enhancement of a Spherical Helix Antenna with Multi-Mode Excitation |
| Sub Title (in English) | |
| Keyword(1) | small antenna |
| Keyword(2) | helix antenna |
| Keyword(3) | radiation efficiency |
| Keyword(4) | Q factor |
| Keyword(5) | spherical surface antenna |
| Keyword(6) | |
| Keyword(7) | |
| Keyword(8) | |
| 1st Author's Name | Takuma Shimada |
| 1st Author's Affiliation | Maebashi Institute of Technology (MIT) |
| 2nd Author's Name | Mina Nishie |
| 2nd Author's Affiliation | Kanazawa Institute of Technology (KIT) |
| 3rd Author's Name | Keisuke Noguchi |
| 3rd Author's Affiliation | Kanazawa Institute of Technology (KIT) |
| 4th Author's Name | Keisuke Fujita |
| 4th Author's Affiliation | Maebashi Institute of Technology (MIT) |
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| Speaker | Author-1 |
| Date Time | 2022-09-16 12:25:00 |
| Presentation Time | 25 minutes |
| Registration for | AP |
| Paper # | AP2022-89 |
| Volume (vol) | vol.122 |
| Number (no) | no.182 |
| Page | pp.100-105 |
| #Pages | 6 |
| Date of Issue | 2022-09-07 (AP) |
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