| Presentation | 2007-05-22 Suspended Coupled Balun for Micro-Wave Band using Multi-Layer Liquid Crystal Polymer Substrate Futoshi TAKEUCHI, Suguru KAMEDA, Hiroyuki NAKASE, Tadashi TAKAGI, Kazuo TSUBOUCHI, |
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| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | This paper presents a suitable structure of a balun using a multi-layer substrate. In a conventional planar balun, it is necessary to narrow the space between the coupled lines for obtaining wideband characteristics, but the space between coupled lines has constraints of the production process. Since coupled line of the proposed balun is a suspended line using the multi-layer wiring structure, the coupling factor can be large without constraints of the production process. The wider bandwidth characteristics can be obtained easily. The proposed balun has the perfect symmetrical circuit to realize wideband and good balance characteristics at high frequency. We fabricated the balun using Liquid Crystal Polymer (LCP) substrate for the 5GHz band. From the measurement result, the frequency range of 1dB increase from the minimum value of the transmission loss is 3.23～6.15GHz(bandwidth of 2.92GHz, bandwidth of 58.4%, and center frequency of 5GHz), the amplitude differences were within 0±1dB and phase differences were 180°±10° over the frequency range of 3.23～6.15GHz respectively. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | Balun / Multi-Layer Substrate / Liquid Crystal Polymer / Microwave / 5GHz |
| Paper # | MW2007-24 |
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| Committee | MW |
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| Conference Date | 2007/5/14(1days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | |
| Topics (in Japanese) | (See Japanese page) |
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| Registration To | Microwaves (MW) |
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| Language | JPN |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Suspended Coupled Balun for Micro-Wave Band using Multi-Layer Liquid Crystal Polymer Substrate |
| Sub Title (in English) | |
| Keyword(1) | Balun |
| Keyword(2) | Multi-Layer Substrate |
| Keyword(3) | Liquid Crystal Polymer |
| Keyword(4) | Microwave |
| Keyword(5) | 5GHz |
| 1st Author's Name | Futoshi TAKEUCHI |
| 1st Author's Affiliation | Research Institute of Electrical Communication, Tohoku University() |
| 2nd Author's Name | Suguru KAMEDA |
| 2nd Author's Affiliation | Research Institute of Electrical Communication, Tohoku University |
| 3rd Author's Name | Hiroyuki NAKASE |
| 3rd Author's Affiliation | Research Institute of Electrical Communication, Tohoku University |
| 4th Author's Name | Tadashi TAKAGI |
| 4th Author's Affiliation | Research Institute of Electrical Communication, Tohoku University |
| 5th Author's Name | Kazuo TSUBOUCHI |
| 5th Author's Affiliation | Research Institute of Electrical Communication, Tohoku University |
| Date | 2007-05-22 |
| Paper # | MW2007-24 |
| Volume (vol) | vol.107 |
| Number (no) | 49 |
| Page | pp.pp.- |
| #Pages | 6 |
| Date of Issue | |