Development of wideband orthomode transducers for FAST cryogenic receiver system
This paper describes the design, construction, and performance of the wideband orthomode transducers (OMTs) for the L- (1.2-1.8 GHz), the S- (2-3 GHz) and the P- (0.56-1.12 GHz) band receiver systems of the Five-hundred-meter Aperture Spherical radio Telescope (FAST). These OMTs operate at the cryog...
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| Veröffentlicht in: | Research in astronomy and astrophysics 2020-05, Vol.20 (5), p.71 |
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| creator | Fan, Jin Zhu, Kai Gan, Heng-Qian Jiang, Peng Yang, Jian Cao, Yang Liu, Hong-Fei Zhang, Hang Guo, Ming-Lei Shi, Xiang-Wei |
| description | This paper describes the design, construction, and performance of the wideband orthomode transducers (OMTs) for the L- (1.2-1.8 GHz), the S- (2-3 GHz) and the P- (0.56-1.12 GHz) band receiver systems of the Five-hundred-meter Aperture Spherical radio Telescope (FAST). These OMTs operate at the cryogenic temperature of 70K to reduce their thermal noise contribution to the receiver chains. The development on the FAST L- and S-band quad-ridged waveguide (QRWG) OMTs is carried out based on the theoretical mode analysis. In view of the miniaturization of FAST cryogenic receiver system at P-band, a novel wideband compact bowtie dipole OMT is designed with an octave bandwidth as well as a length of only quarter wavelength. The proposed L-, S- and P-band OMTs are designed and optimized by using Ansys High Frequency Structure Simulator (HFSS), and then manufactured, tested at room temperature. Measurement of FAST cryogenic receiver system noise is also performed with the L-, S- and P-band OMTs installed. The measured results fully comply with the design specifications. |
| doi_str_mv | 10.1088/1674-4527/20/5/71 |
| format | Article |
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These OMTs operate at the cryogenic temperature of 70K to reduce their thermal noise contribution to the receiver chains. The development on the FAST L- and S-band quad-ridged waveguide (QRWG) OMTs is carried out based on the theoretical mode analysis. In view of the miniaturization of FAST cryogenic receiver system at P-band, a novel wideband compact bowtie dipole OMT is designed with an octave bandwidth as well as a length of only quarter wavelength. The proposed L-, S- and P-band OMTs are designed and optimized by using Ansys High Frequency Structure Simulator (HFSS), and then manufactured, tested at room temperature. Measurement of FAST cryogenic receiver system noise is also performed with the L-, S- and P-band OMTs installed. The measured results fully comply with the design specifications.</description><identifier>ISSN: 1674-4527</identifier><identifier>DOI: 10.1088/1674-4527/20/5/71</identifier><language>eng</language><publisher>Beijing: National Astronomical Observatories, CAS and IOP Publishing Ltd</publisher><subject>Apertures ; Bandwidths ; Broadband ; CAD ; Computer aided design ; Cryogenic engineering ; Cryogenic temperature ; Design specifications ; Dipoles ; FAST ; instruments ; Miniaturization ; Noise reduction ; Radio telescopes ; Room temperature ; Superhigh frequencies ; telescopes ; Thermal noise ; Transducers ; Waveguides</subject><ispartof>Research in astronomy and astrophysics, 2020-05, Vol.20 (5), p.71</ispartof><rights>2020 National Astronomical Observatories, CAS and IOP Publishing Ltd.</rights><rights>Copyright IOP Publishing May 2020</rights><lds50>peer_reviewed</lds50><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c459t-82f507aac38bb63bb09a7626dbead18c94d397524f194eb676a5b88a7a9a1dbf3</citedby><cites>FETCH-LOGICAL-c459t-82f507aac38bb63bb09a7626dbead18c94d397524f194eb676a5b88a7a9a1dbf3</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktopdf>$$Uhttps://iopscience.iop.org/article/10.1088/1674-4527/20/5/71/pdf$$EPDF$$P50$$Giop$$H</linktopdf><link.rule.ids>230,314,778,782,883,27911,27912,53833</link.rule.ids><backlink>$$Uhttps://research.chalmers.se/publication/517538$$DView record from Swedish Publication Index$$Hfree_for_read</backlink></links><search><creatorcontrib>Fan, Jin</creatorcontrib><creatorcontrib>Zhu, Kai</creatorcontrib><creatorcontrib>Gan, Heng-Qian</creatorcontrib><creatorcontrib>Jiang, Peng</creatorcontrib><creatorcontrib>Yang, Jian</creatorcontrib><creatorcontrib>Cao, Yang</creatorcontrib><creatorcontrib>Liu, Hong-Fei</creatorcontrib><creatorcontrib>Zhang, Hang</creatorcontrib><creatorcontrib>Guo, Ming-Lei</creatorcontrib><creatorcontrib>Shi, Xiang-Wei</creatorcontrib><title>Development of wideband orthomode transducers for FAST cryogenic receiver system</title><title>Research in astronomy and astrophysics</title><addtitle>Res. Astron. Astrophys</addtitle><description>This paper describes the design, construction, and performance of the wideband orthomode transducers (OMTs) for the L- (1.2-1.8 GHz), the S- (2-3 GHz) and the P- (0.56-1.12 GHz) band receiver systems of the Five-hundred-meter Aperture Spherical radio Telescope (FAST). These OMTs operate at the cryogenic temperature of 70K to reduce their thermal noise contribution to the receiver chains. The development on the FAST L- and S-band quad-ridged waveguide (QRWG) OMTs is carried out based on the theoretical mode analysis. In view of the miniaturization of FAST cryogenic receiver system at P-band, a novel wideband compact bowtie dipole OMT is designed with an octave bandwidth as well as a length of only quarter wavelength. The proposed L-, S- and P-band OMTs are designed and optimized by using Ansys High Frequency Structure Simulator (HFSS), and then manufactured, tested at room temperature. Measurement of FAST cryogenic receiver system noise is also performed with the L-, S- and P-band OMTs installed. The measured results fully comply with the design specifications.</description><subject>Apertures</subject><subject>Bandwidths</subject><subject>Broadband</subject><subject>CAD</subject><subject>Computer aided design</subject><subject>Cryogenic engineering</subject><subject>Cryogenic temperature</subject><subject>Design specifications</subject><subject>Dipoles</subject><subject>FAST</subject><subject>instruments</subject><subject>Miniaturization</subject><subject>Noise reduction</subject><subject>Radio telescopes</subject><subject>Room temperature</subject><subject>Superhigh frequencies</subject><subject>telescopes</subject><subject>Thermal noise</subject><subject>Transducers</subject><subject>Waveguides</subject><issn>1674-4527</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2020</creationdate><recordtype>article</recordtype><recordid>eNp1kU9P3DAQxXOgEpT2A3CL1F7TtR3_PSJaaCUkkIDzaGxPukGbOLWzoP323SgVvbSnkUZvfjPvTVVdcPaFM2s3XBvZSCXMRrCN2hh-Up299U6r96U8M6aV0uKsuv9KL7RL00DjXKeufu0jeRxjnfK8TUOKVM8ZxxL3gXKpu5Tr68uHxzrkQ_pJYx_qTIH6F8p1OZSZhg_Vuw53hT7-qefV0_W3x6vvze3dzY-ry9smSOXmxopOMYMYWuu9br1nDo0WOnrCyG1wMrbOKCE77iR5bTQqby0adMij79rz6mHlllea9h6m3A-YD5Cwh0yFMIcthC3uhuPdUAhiq2wXvISgXQuyjQI8Mx6cR43ERYyBH6mfVuqU0689lRme0z6PRyMgJNNaWdeyo4qvqpBTKZm6t-2cwfICWOKGJW4QDBSYhfx5nenT9BeaEVcFMxymuNhq_iH7P_Y35pGXIw</recordid><startdate>20200501</startdate><enddate>20200501</enddate><creator>Fan, Jin</creator><creator>Zhu, Kai</creator><creator>Gan, Heng-Qian</creator><creator>Jiang, Peng</creator><creator>Yang, Jian</creator><creator>Cao, Yang</creator><creator>Liu, Hong-Fei</creator><creator>Zhang, Hang</creator><creator>Guo, Ming-Lei</creator><creator>Shi, Xiang-Wei</creator><general>National Astronomical Observatories, CAS and IOP Publishing Ltd</general><general>IOP Publishing</general><scope>AAYXX</scope><scope>CITATION</scope><scope>7TG</scope><scope>8FD</scope><scope>H8D</scope><scope>KL.</scope><scope>L7M</scope><scope>ADTPV</scope><scope>AOWAS</scope><scope>F1S</scope></search><sort><creationdate>20200501</creationdate><title>Development of wideband orthomode transducers for FAST cryogenic receiver system</title><author>Fan, Jin ; Zhu, Kai ; Gan, Heng-Qian ; Jiang, Peng ; Yang, Jian ; Cao, Yang ; Liu, Hong-Fei ; Zhang, Hang ; Guo, Ming-Lei ; Shi, Xiang-Wei</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c459t-82f507aac38bb63bb09a7626dbead18c94d397524f194eb676a5b88a7a9a1dbf3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2020</creationdate><topic>Apertures</topic><topic>Bandwidths</topic><topic>Broadband</topic><topic>CAD</topic><topic>Computer aided design</topic><topic>Cryogenic engineering</topic><topic>Cryogenic temperature</topic><topic>Design specifications</topic><topic>Dipoles</topic><topic>FAST</topic><topic>instruments</topic><topic>Miniaturization</topic><topic>Noise reduction</topic><topic>Radio telescopes</topic><topic>Room temperature</topic><topic>Superhigh frequencies</topic><topic>telescopes</topic><topic>Thermal noise</topic><topic>Transducers</topic><topic>Waveguides</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Fan, Jin</creatorcontrib><creatorcontrib>Zhu, Kai</creatorcontrib><creatorcontrib>Gan, Heng-Qian</creatorcontrib><creatorcontrib>Jiang, Peng</creatorcontrib><creatorcontrib>Yang, Jian</creatorcontrib><creatorcontrib>Cao, Yang</creatorcontrib><creatorcontrib>Liu, Hong-Fei</creatorcontrib><creatorcontrib>Zhang, Hang</creatorcontrib><creatorcontrib>Guo, Ming-Lei</creatorcontrib><creatorcontrib>Shi, Xiang-Wei</creatorcontrib><collection>CrossRef</collection><collection>Meteorological & Geoastrophysical Abstracts</collection><collection>Technology Research Database</collection><collection>Aerospace Database</collection><collection>Meteorological & Geoastrophysical Abstracts - Academic</collection><collection>Advanced Technologies Database with Aerospace</collection><collection>SwePub</collection><collection>SwePub Articles</collection><collection>SWEPUB Chalmers tekniska högskola</collection><jtitle>Research in astronomy and astrophysics</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Fan, Jin</au><au>Zhu, Kai</au><au>Gan, Heng-Qian</au><au>Jiang, Peng</au><au>Yang, Jian</au><au>Cao, Yang</au><au>Liu, Hong-Fei</au><au>Zhang, Hang</au><au>Guo, Ming-Lei</au><au>Shi, Xiang-Wei</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Development of wideband orthomode transducers for FAST cryogenic receiver system</atitle><jtitle>Research in astronomy and astrophysics</jtitle><addtitle>Res. Astron. Astrophys</addtitle><date>2020-05-01</date><risdate>2020</risdate><volume>20</volume><issue>5</issue><spage>71</spage><pages>71-</pages><issn>1674-4527</issn><abstract>This paper describes the design, construction, and performance of the wideband orthomode transducers (OMTs) for the L- (1.2-1.8 GHz), the S- (2-3 GHz) and the P- (0.56-1.12 GHz) band receiver systems of the Five-hundred-meter Aperture Spherical radio Telescope (FAST). These OMTs operate at the cryogenic temperature of 70K to reduce their thermal noise contribution to the receiver chains. The development on the FAST L- and S-band quad-ridged waveguide (QRWG) OMTs is carried out based on the theoretical mode analysis. In view of the miniaturization of FAST cryogenic receiver system at P-band, a novel wideband compact bowtie dipole OMT is designed with an octave bandwidth as well as a length of only quarter wavelength. The proposed L-, S- and P-band OMTs are designed and optimized by using Ansys High Frequency Structure Simulator (HFSS), and then manufactured, tested at room temperature. Measurement of FAST cryogenic receiver system noise is also performed with the L-, S- and P-band OMTs installed. The measured results fully comply with the design specifications.</abstract><cop>Beijing</cop><pub>National Astronomical Observatories, CAS and IOP Publishing Ltd</pub><doi>10.1088/1674-4527/20/5/71</doi><tpages>11</tpages><oa>free_for_read</oa></addata></record> |
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| subjects | Apertures Bandwidths Broadband CAD Computer aided design Cryogenic engineering Cryogenic temperature Design specifications Dipoles FAST instruments Miniaturization Noise reduction Radio telescopes Room temperature Superhigh frequencies telescopes Thermal noise Transducers Waveguides |
| title | Development of wideband orthomode transducers for FAST cryogenic receiver system |
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