| Presentation | 2022-11-15 Development of superconducting quad-band bandpass filter for a wideband receiver used in radio astronomy Sota Rachi, Keita Sakuma, Takuya Akahori, Naoto Sekiya, |
|---|---|
| PDF Download Page |  PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | Mizusawa VLBI Observatory of the National Astronomical Observatory of Japan are promoting the development of broadband receivers in the ultra-high frequency (UHF) band (0.7~2.1 GHz). However, continuous broadband radio observations in the UHF band are not possible due to the presence of radio frequency interferences (RFI). We have developed a superconducting quad-band bandpass filter (QB-BPF) at 0.7, 1.4, 1.6, and 2.1 GHz for wideband receivers. That consists of two dual-band bandpass filters. We have devised an interdigital feeding structure with a high degree of freedom in designing external quality factor. The measured and simulated results of the QB-BPF are in good agreement. We have successfully developed a QB-BPF that overcomes the problem of extensive RFI. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | high-temperature superconductor / quad-band bandpass filter / radio astronomy |
| Paper # | MW2022-114 |
| Date of Issue | 2022-11-08 (MW) |
| Conference Information | |
| Committee | MW |
|---|---|
| Conference Date | 2022/11/15(2days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | Fukue-Bunka-Kaikan |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | Microwave, etc. |
| Chair | Noriharu Suematsu(Tohoku Univ.) |
| Vice Chair | Tadashi Kawai(Univ. of Hyogo) / Kensuke Okubo(Okayama Prefectural Univ.) / Hideyuki Nakamizo(Mitsubishi Electric) |
| Secretary | Tadashi Kawai(Univ. of Electro-Comm) / Kensuke Okubo(Toshiba) / Hideyuki Nakamizo |
| Assistant | Naoki Hasegawa(Softbank) / Kosuke Katayama(NIT Tokuyama College) |
| 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) | Development of superconducting quad-band bandpass filter for a wideband receiver used in radio astronomy |
| Sub Title (in English) | |
| Keyword(1) | high-temperature superconductor |
| Keyword(2) | quad-band bandpass filter |
| Keyword(3) | radio astronomy |
| 1st Author's Name | Sota Rachi |
| 1st Author's Affiliation | Yamanashi University(Yamanashi Univ.) |
| 2nd Author's Name | Keita Sakuma |
| 2nd Author's Affiliation | Yamanashi University(Yamanashi Univ.) |
| 3rd Author's Name | Takuya Akahori |
| 3rd Author's Affiliation | National Astronomical Observatory of Japan(NAOJ) |
| 4th Author's Name | Naoto Sekiya |
| 4th Author's Affiliation | Yamanashi University(Yamanashi Univ.) |
| Date | 2022-11-15 |
| Paper # | MW2022-114 |
| Volume (vol) | vol.122 |
| Number (no) | MW-250 |
| Page | pp.pp.31-36(MW), |
| #Pages | 6 |
| Date of Issue | 2022-11-08 (MW) |