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| Presentation | 2009-10-16 13:00 [Poster Presentation] Development of an Ultra-Wideband Short-Range Radar at Ka-Band Suppressing Carrier Leakage Hironori Enkouji, Takehiko Nishide, Natsuki Hashimoto, Takehiko Kobayashi (Tokyo Denki Univ.)  WBS2009-30 |
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| Abstract | (in Japanese) | (See Japanese page) |
| (in English) | Modulated impulse radars have been most commonly used for Ka-band ultra-wideband (UWB) short-range vehicular applications, where a carrier frequency is amplitude-modulated with short-duration impulse trains. Carrier leakage due to finite isolation of microwave mixers (functioning as modulators) limits total transmitting power and effective maximum detection range to comply with spectral mask. Instead of a single mixer serving as a modulator, the authors propose a use of dual-stage mixers to generate modulated Gaussian monopulse trains. The carrier frequency was gated with a mixer by a gating pulse wider than the monopulse; and then the pulsed carrier was modulated with the other mixer by the monopulse. Without gating, the level of the carrier frequency tone was 25-dB higher than maximum level of sideband components, and occupied 60% within the total transmitting power. When the gating pulse duration = 5 ns, the carrier tone was suppressed nearly 15-dB below the maximum level of the sidebands, and occupied less than 0.04% within the total transmitting power. The sideband spectra were virtually unchanged. To comply with the spectral mask, the proposed radar can expand the maximum detection range by a factor of 4.2 (= (10 25/10)1/4 ). | |
| Keyword | (in Japanese) | (See Japanese page) |
| (in English) | ultra wideband / ultra wideband radar / carrier leakage / pulse radar / EIRP / / / | |
| Reference Info. | IEICE Tech. Rep., vol. 109, no. 233, WBS2009-30, pp. 31-36, Oct. 2009. | |
| Paper # | WBS2009-30 | |
| Date of Issue | 2009-10-09 (WBS) | |
| ISSN | Print edition: ISSN 0913-5685 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 | WBS2009-30 |
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| Conference Information | |
| Committee | WBS |
| Conference Date | 2009-10-16 - 2009-10-16 |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | |
| Paper Information | |
| Registration To | WBS |
| Conference Code | 2009-10-WBS |
| Language | Japanese |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Development of an Ultra-Wideband Short-Range Radar at Ka-Band Suppressing Carrier Leakage |
| Sub Title (in English) | |
| Keyword(1) | ultra wideband |
| Keyword(2) | ultra wideband radar |
| Keyword(3) | carrier leakage |
| Keyword(4) | pulse radar |
| Keyword(5) | EIRP |
| Keyword(6) | |
| Keyword(7) | |
| Keyword(8) | |
| 1st Author's Name | Hironori Enkouji |
| 1st Author's Affiliation | Tokyo Denki University (Tokyo Denki Univ.) |
| 2nd Author's Name | Takehiko Nishide |
| 2nd Author's Affiliation | Tokyo Denki University (Tokyo Denki Univ.) |
| 3rd Author's Name | Natsuki Hashimoto |
| 3rd Author's Affiliation | Tokyo Denki University (Tokyo Denki Univ.) |
| 4th Author's Name | Takehiko Kobayashi |
| 4th Author's Affiliation | Tokyo Denki University (Tokyo Denki Univ.) |
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| Speaker | Author-1 |
| Date Time | 2009-10-16 13:00:00 |
| Presentation Time | 180 minutes |
| Registration for | WBS |
| Paper # | WBS2009-30 |
| Volume (vol) | vol.109 |
| Number (no) | no.233 |
| Page | pp.31-36 |
| #Pages | 6 |
| Date of Issue | 2009-10-09 (WBS) |
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