| Presentation | 2005-09-12 Cruciform Waveguide Directional Couplers Katsunori TODA, Isao OHTA, Yoshihiro YUMITA, Mitsuyoshi KISHIHARA, |
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| PDF Download Page |  PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | This paper suggests a very compact waveguide directional coupler with tight coupling of 3-dB or so, which is composed of two cross H-plane rectangular waveguides having two metallic posts in the square junction and one at each port. The two posts set symmetrically along a diagonal line of the cross region mainly make for the directional properties, and one placed properly near the junction at each input/output port realizes a matched state. Actually, several couplers are successfully designed at X-band based upon this concept, and good properties are obtained. Next, a band-broadening technique for a 3-dB coupler is developed. As a result, a considerable wide bandwidth of about 28% is realized for the return loss and isolation better than 20dB, and the power-split unbalance within 0.1dB. Additionally, the design procedure is validated by em-simulations (HFSS). The present coupler is marked by a compact coplanar structure, four right-angled ports, ease to realize 3-dB coupling, and relatively broad bandwidth. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | Rectangular waveguide / Directional coupler / Hybrid / Waveguide component / Planar circuit approach |
| Paper # | MW2005-74 |
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| Conference Information | |
| Committee | MW |
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| Conference Date | 2005/9/5(1days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | |
| Chair | |
| Vice Chair | |
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| Paper Information | |
| 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) | Cruciform Waveguide Directional Couplers |
| Sub Title (in English) | |
| Keyword(1) | Rectangular waveguide |
| Keyword(2) | Directional coupler |
| Keyword(3) | Hybrid |
| Keyword(4) | Waveguide component |
| Keyword(5) | Planar circuit approach |
| 1st Author's Name | Katsunori TODA |
| 1st Author's Affiliation | Graduate School of Engineering, University of Hyogo() |
| 2nd Author's Name | Isao OHTA |
| 2nd Author's Affiliation | Graduate School of Engineering, University of Hyogo |
| 3rd Author's Name | Yoshihiro YUMITA |
| 3rd Author's Affiliation | Murata Manufacturing Co., Ltd. |
| 4th Author's Name | Mitsuyoshi KISHIHARA |
| 4th Author's Affiliation | Okayama Prefectural University |
| Date | 2005-09-12 |
| Paper # | MW2005-74 |
| Volume (vol) | vol.105 |
| Number (no) | 271 |
| Page | pp.pp.- |
| #Pages | 6 |
| Date of Issue | |