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| Presentation | 2020-11-19 14:20 Gain improvement of a 130 GHz CMOS amplifier by using radial stub as AC ground Taiki Machii, Mizuki Motoyoshi, Suguru Kameda, Noriharu Suematsu (Tohoku Univ.)  MW2020-68 Link to ES Tech. Rep. Archives: MW2020-68 |
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| Abstract | (in Japanese) | (See Japanese page) |
| (in English) | Low-loss matching circuit is an important issue since sufficient gain cannot be achieved with over-100 GHz CMOS amplifiers. In the case of matching circuit with short stub, the short stub should be terminated to the ground. Since the matching circuit is applied DC bias to operate the FET of amplifier, the ground should not be directly connected the ground (DC ground) but should be AC ground. AC ground with MIM capacitor is widely used in microwave frequency range, but 1/4 g open stub is used for over-100 GHz amplifier to reduce the loss of the AC ground. In this paper, we examine the losses of open stub using low-impedance line and radial stub. Theoretical analysis based on the series resistance of the conductor, EM simulation which take into account conductor loss and dielectric loss, and the measurement of fabricated stubs show the superiority of the radial stub than the open stub. The fabricated 130 GHz CMOS amplifiers having an input and an output matching circuits with radial stubs show higher gain than that with open stubs. | |
| Keyword | (in Japanese) | (See Japanese page) |
| (in English) | CMOS / Amplifiers / Radial stub / Open stub / Millimeter-wave / RFICs / D-band / | |
| Reference Info. | IEICE Tech. Rep., vol. 120, no. 240, MW2020-68, pp. 18-22, Nov. 2020. | |
| Paper # | MW2020-68 | |
| Date of Issue | 2020-11-12 (MW) | |
| 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 | MW2020-68 Link to ES Tech. Rep. Archives: MW2020-68 |
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| Conference Information | |
| Committee | MW |
| Conference Date | 2020-11-19 - 2020-11-19 |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | Online |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | |
| Paper Information | |
| Registration To | MW |
| Conference Code | 2020-11-MW |
| Language | Japanese |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Gain improvement of a 130 GHz CMOS amplifier by using radial stub as AC ground |
| Sub Title (in English) | |
| Keyword(1) | CMOS |
| Keyword(2) | Amplifiers |
| Keyword(3) | Radial stub |
| Keyword(4) | Open stub |
| Keyword(5) | Millimeter-wave |
| Keyword(6) | RFICs |
| Keyword(7) | D-band |
| Keyword(8) | |
| 1st Author's Name | Taiki Machii |
| 1st Author's Affiliation | Tohoku University (Tohoku Univ.) |
| 2nd Author's Name | Mizuki Motoyoshi |
| 2nd Author's Affiliation | Tohoku University (Tohoku Univ.) |
| 3rd Author's Name | Suguru Kameda |
| 3rd Author's Affiliation | Tohoku University (Tohoku Univ.) |
| 4th Author's Name | Noriharu Suematsu |
| 4th Author's Affiliation | Tohoku University (Tohoku Univ.) |
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| Speaker | Author-1 |
| Date Time | 2020-11-19 14:20:00 |
| Presentation Time | 25 minutes |
| Registration for | MW |
| Paper # | MW2020-68 |
| Volume (vol) | vol.120 |
| Number (no) | no.240 |
| Page | pp.18-22 |
| #Pages | 5 |
| Date of Issue | 2020-11-12 (MW) |
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