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http://hdl.handle.net/20.500.12386/26615
Title: | High-performance cryogenic fractal 180° hybrid power divider with integrated directional coupler | Authors: | LADU, Adelaide MONTISCI, GIORGIO VALENTE, Giuseppe NAVARRINI, Alessandro MARONGIU, Pasqualino PISANU, Tonino Mazzarella, Giuseppe |
Issue Date: | 2017 | Journal: | RADIO SCIENCE | Number: | 52 | Issue: | 6 | First Page: | 757 | Abstract: | A 180° hybrid and a directional coupler to be employed in the P-band cryogenic receiver of the Sardinia Radio Telescope are proposed in this work. An in-depth study of the issues related to the use of microwave components for cryogenic radio astronomy receivers is carried out to select the best suited technology and configuration. As a result, a planar fractal 180° hybrid configuration available in the literature has been optimized aiming to increase the operating bandwidth in order to comply with the design specifications of the application at hand. A coupled line directional coupler with weak coupling and high isolation, used to calibrate the receiver chain, is cascaded to the 180° hybrid and realized in the same layout. The final device, consisting of the 180° hybrid and the directional coupler, has been manufactured and tested at the cryogenic temperature of 20 K, showing a good agreement between experimental results and predicted performance. | URI: | http://hdl.handle.net/20.500.12386/26615 | URL: | https://agupubs.onlinelibrary.wiley.com/doi/abs/10.1002/2017RS006292 | ISSN: | 0048-6604 | DOI: | 10.1002/2017RS006292 | Bibcode ADS: | 2017RaSc...52..757L | Fulltext: | open |
Appears in Collections: | 1.01 Articoli in rivista |
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PUB1-High-performance cryogenic fractal 180° hybrid power divider with integrated directional coupler.pdf | Pdf editoriale | 2.44 MB | Adobe PDF | View/Open |
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