| Presentation | 2016-05-19 A Directivity Enhancement for Directional Couplers Using Three-Conductor Coupled Lines Hidehar Yoshioka, Akimichi Hirota, Hidenori Ishibashi, Naofumi Yoneda, Moriyasu Miyazaki, |
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| PDF Download Page |  PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | In a coupled-line directional coupler formed on thin multi-layered substrates, it is difficult to match coupled-line characteristic impedance (ZC) with load impedance (ZL). This impedance mismatching causes a forward coupling in the directional coupler, which results in degradation of the directivity. In this study, we have proposed a new method for improving the directivity of the coupled-line directional couplers with the impedance mismatching. The method utilizes a reverse-phase forward coupling by an additional coupled line that is configured as part of three-conductor coupled lines to cancel the undesired forward coupling. It has been experimentally verified that the proposed directional coupler has directivity enhancement of 8.2 dB at 0.84 GHz compared with the conventional directional coupler. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | Directional coupler / Directivity / Forward coupling / Multi-layered substrate |
| Paper # | MW2016-10 |
| Date of Issue | 2016-05-12 (MW) |
| Conference Information | |
| Committee | MW |
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| Conference Date | 2016/5/19(2days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | Kyoto Univ. |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | Microwave Technologies |
| Chair | Yohei Ishikawa(Kyoto Univ.) |
| Vice Chair | Masashi Nakatsugawa(NTT) / Takao Kuki(Kokushikan Univ.) / Kenjiro Nishikawa(Kagoshima Univ.) |
| Secretary | Masashi Nakatsugawa(NTT) / Takao Kuki(Panasonic) / Kenjiro Nishikawa |
| Assistant | Ryo Ishikawa(Univ. of Electro-Comm.) / Naoto Sekiya(Univ. of Yamanashi) |
| Paper Information | |
| Registration To | 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) | A Directivity Enhancement for Directional Couplers Using Three-Conductor Coupled Lines |
| Sub Title (in English) | |
| Keyword(1) | Directional coupler |
| Keyword(2) | Directivity |
| Keyword(3) | Forward coupling |
| Keyword(4) | Multi-layered substrate |
| 1st Author's Name | Hidehar Yoshioka |
| 1st Author's Affiliation | Mitsubishi Electric Corporation(Mitsubishi) |
| 2nd Author's Name | Akimichi Hirota |
| 2nd Author's Affiliation | Mitsubishi Electric Corporation(Mitsubishi) |
| 3rd Author's Name | Hidenori Ishibashi |
| 3rd Author's Affiliation | Mitsubishi Electric Corporation(Mitsubishi) |
| 4th Author's Name | Naofumi Yoneda |
| 4th Author's Affiliation | Mitsubishi Electric Corporation(Mitsubishi) |
| 5th Author's Name | Moriyasu Miyazaki |
| 5th Author's Affiliation | Mitsubishi Electric Corporation(Mitsubishi) |
| Date | 2016-05-19 |
| Paper # | MW2016-10 |
| Volume (vol) | vol.116 |
| Number (no) | MW-51 |
| Page | pp.pp.7-10(MW), |
| #Pages | 4 |
| Date of Issue | 2016-05-12 (MW) |