| Presentation | 2018-07-19 A Formulation of Gain Margin and Required Power for Closed-Loop Active Load-Pull Systems Kentaro Kawabe, Toshio Ishizaki, |
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| PDF Download Page |  PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | As a design method for microwave power amplifier, passive load-pull method for obtaining the optimum load impedance is well-known. But, it has some problems such as narrow measurement range due to the loss of impedance tuner. The Active Load-Pull (ALP) system which can solve this problem attracts attention. ALP can be categorized in open-loop type and closed-loop type. The closed-loop type were researched actively, because of its high speed measurement and ease of control of reflected waves. However, closed-loop type has a risk of oscillation. In order to solve the problem, the authors propose a composite ALP system with open-loop and closed-loop. ALP gain margin, required injection power were derived analytically and experiments were carried out. It was confirmed the gain margin depends only on the reflection coefficient to be created. And it was found that the required power depends on the output impedance of the DUT. By comparing the performances of the proposed and conventional ALPs, gain margin was improved 6dB and power requirements was improved 3dB, when injection powers of open-loop and closed-loop is equal. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | Microwave power amplifier / Active load-pull / Open-Loop / Closed-Loop / Gain margin / Injection power |
| Paper # | EMT2018-32,MW2018-47,OPE2018-35,EST2018-30,MWP2018-31 |
| Date of Issue | 2018-07-12 (EMT, MW, OPE, EST, MWP) |
| Conference Information | |
| Committee | EST / MW / OPE / MWP / EMT / IEE-EMT |
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| Conference Date | 2018/7/19(2days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | |
| Chair | Akimasa Hirata(Nagoya Inst. of Tech.) / Masahiro Muraguchi(TUS) / Kouki Sato(Furukawa Electric Industries) / Tetsuya Kawanishi(Waseda Univ.) / Akira Hirose(Univ. of Tokyo) / Keiji Goto(National Defense Academy) |
| Vice Chair | Shinichiro Ohnuki(Nihon Univ.) / Masayuki Kimishima(Advantest) / Jun Shibayama(Hosei Univ.) / Yoshinori Kogami(Utsunomiya Univ.) / Hiroshi Okazaki(NTT DOCOMO) / Kenichi Tajima(Mitsubishi Electric) / Hiroshi Takahashi(Sophia Univ.) / Naoto Yoshimoto(Chitose Inst. of Science and Tech.) / Koichi Hirayama(Kitami Inst. of Tech.) |
| Secretary | Shinichiro Ohnuki(CIST) / Masayuki Kimishima(National Inst. of Tech.,Sendai College) / Jun Shibayama(HITACHI) / Yoshinori Kogami(Utsunomiya Univ.) / Hiroshi Okazaki(Univ. of Tokyo) / Kenichi Tajima(NICT) / Hiroshi Takahashi(NICT) / Naoto Yoshimoto(Chiba Inst. of Tech.) / Koichi Hirayama(Tokyo Metro. Coll. of Tech) / (Fukuoka Inst.of Tech.) |
| Assistant | Takahiro Ito(Nagoya Inst. of Tech.) / Kazuhiro Fujita(Fujitsu) / Mizuki Motoyoshi(Tohoku Univ.) / Satoshi Yoshida(Kagoshima Univ.) / Yuya Shoji(Tokyo Inst. of Tech.) / Kazunori Seno(NTT) / Kensuke Ikeda(CRIEPI) / Kosuke Nishimura(KDDI Research) / Junichiro Sugisaka(Kitami Inst. of Tech.) / Yoshihiro Naka(Kyushu Univ. of Health and Welfare) |
| Paper Information | |
| Registration To | Technical Committee on Electronics Simulation Technology / Technical Committee on Microwaves / Technical Committee on OptoElectronics / Technical Committee on Microwave and Millimeter-wave Photonics / Technical Committee on Electromagnetic Theory / Technical Meeting on Electromagnetic Theory |
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| Language | JPN |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | A Formulation of Gain Margin and Required Power for Closed-Loop Active Load-Pull Systems |
| Sub Title (in English) | |
| Keyword(1) | Microwave power amplifier |
| Keyword(2) | Active load-pull |
| Keyword(3) | Open-Loop |
| Keyword(4) | Closed-Loop |
| Keyword(5) | Gain margin |
| Keyword(6) | Injection power |
| 1st Author's Name | Kentaro Kawabe |
| 1st Author's Affiliation | Ryukoku University(Ryukoku Univ.) |
| 2nd Author's Name | Toshio Ishizaki |
| 2nd Author's Affiliation | Ryukoku University(Ryukoku Univ.) |
| Date | 2018-07-19 |
| Paper # | EMT2018-32,MW2018-47,OPE2018-35,EST2018-30,MWP2018-31 |
| Volume (vol) | vol.118 |
| Number (no) | EMT-141,MW-142,OPE-143,EST-144,MWP-145 |
| Page | pp.pp.137-142(EMT), pp.137-142(MW), pp.137-142(OPE), pp.137-142(EST), pp.137-142(MWP), |
| #Pages | 6 |
| Date of Issue | 2018-07-12 (EMT, MW, OPE, EST, MWP) |