| Presentation | 2016-05-19 A Novel 4-Port Lumped Element Circulator for High-isolation Front-end system Kei Matsutani, Takaya Wada, Yusuke Kusumoto, Masayoshi Koshino, Makoto Kawashima, |
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| PDF Download Page |  PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | A novel 4-port circulator for multi-standard and multi-band cellular handsets has been successfully developed byusing the Core-Circulator technique. The circulator is realized with lumped element circuits and a weak magnetic fieldoperation. The insertion loss of 1.3dB maximum in 777-787MHz (Band 13) and the TX-RX isolation of 20dB minimum in 35% fractional bandwidth which is including cellular whole low-band have been obtained. Its size is 2.0 mm width X 2.0 mm length X 0.5 mm height. Experimental results of the combination of conventional SAW filters and the developed 4-port circulator have exhibited an extremely high isolation performance of 79dB and robustness against variations of antenna impedance. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | Lumped element microwave circuit / circulator / duplexer / ferrites / microwave devices |
| Paper # | MW2016-11 |
| 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 |
|---|---|
| Language | JPN |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | A Novel 4-Port Lumped Element Circulator for High-isolation Front-end system |
| Sub Title (in English) | |
| Keyword(1) | Lumped element microwave circuit |
| Keyword(2) | circulator |
| Keyword(3) | duplexer |
| Keyword(4) | ferrites |
| Keyword(5) | microwave devices |
| 1st Author's Name | Kei Matsutani |
| 1st Author's Affiliation | Murata Manufacturing Co., Ltd.(Murata) |
| 2nd Author's Name | Takaya Wada |
| 2nd Author's Affiliation | Murata Manufacturing Co., Ltd.(Murata) |
| 3rd Author's Name | Yusuke Kusumoto |
| 3rd Author's Affiliation | Murata Manufacturing Co., Ltd.(Murata) |
| 4th Author's Name | Masayoshi Koshino |
| 4th Author's Affiliation | Murata Manufacturing Co., Ltd.(Murata) |
| 5th Author's Name | Makoto Kawashima |
| 5th Author's Affiliation | Murata Manufacturing Co., Ltd.(Murata) |
| Date | 2016-05-19 |
| Paper # | MW2016-11 |
| Volume (vol) | vol.116 |
| Number (no) | MW-51 |
| Page | pp.pp.11-14(MW), |
| #Pages | 4 |
| Date of Issue | 2016-05-12 (MW) |