The optical system of the Tenerife Microwave Spectrometer: a window for observing the 10–20 GHz sky spectra
The TMS optical system is based on a decentered dual-reflector system in a Gregorian configuration to observe with an angular resolution of less than 2°. The primary goal of the present study is to evaluate the final design and verify that it satisfies the design requirements. We aim for low cross-p...
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| Veröffentlicht in: | Journal of instrumentation 2021-12, Vol.16 (12), p.P12037 |
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| container_issue | 12 |
| container_start_page | P12037 |
| container_title | Journal of instrumentation |
| container_volume | 16 |
| creator | Alonso-Arias, P. Fuerte-Rodríguez, P.A. Hoyland, R.J. Rubiño-Martín, J.A. |
| description | The TMS optical system is based on a decentered
dual-reflector system in a Gregorian configuration to observe with
an angular resolution of less than 2°. The primary goal
of the present study is to evaluate the final design and verify that
it satisfies the design requirements. We aim for low
cross-polarization (-30 dB), low sidelobe (-25 dB) levels, and a
stable beam in terms of shape (low ellipticity) and size over a full
octave bandwidth (10–20 GHz). We performed both ray-tracing and
full-wave simulations using the CST Studio software in order to
investigate the system behaviour. We gave special attention to the
beam frequency variation and polarization leakage. We have
characterized the effects on the radiation pattern produced by the
cryostat window. We present the final design of the TMS optical
system, as well as a complete study of the system's performance in
terms of cross-polarization, sidelobes, ellipticity and
beamwidth. We discuss the effects of sidelobes and study the need
for a baffle. |
| doi_str_mv | 10.1088/1748-0221/16/12/P12037 |
| format | Article |
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dual-reflector system in a Gregorian configuration to observe with
an angular resolution of less than 2°. The primary goal
of the present study is to evaluate the final design and verify that
it satisfies the design requirements. We aim for low
cross-polarization (-30 dB), low sidelobe (-25 dB) levels, and a
stable beam in terms of shape (low ellipticity) and size over a full
octave bandwidth (10–20 GHz). We performed both ray-tracing and
full-wave simulations using the CST Studio software in order to
investigate the system behaviour. We gave special attention to the
beam frequency variation and polarization leakage. We have
characterized the effects on the radiation pattern produced by the
cryostat window. We present the final design of the TMS optical
system, as well as a complete study of the system's performance in
terms of cross-polarization, sidelobes, ellipticity and
beamwidth. We discuss the effects of sidelobes and study the need
for a baffle.</description><identifier>ISSN: 1748-0221</identifier><identifier>EISSN: 1748-0221</identifier><identifier>DOI: 10.1088/1748-0221/16/12/P12037</identifier><language>eng</language><publisher>Bristol: IOP Publishing</publisher><subject>Angular resolution ; Ellipticity ; Frequency variation ; Instruments for CMB observations ; Microwave radiometers ; Modelling of microwave systems ; Optics ; Polarization ; Ray tracing ; Sidelobe reduction ; Sidelobes</subject><ispartof>Journal of instrumentation, 2021-12, Vol.16 (12), p.P12037</ispartof><rights>2021 IOP Publishing Ltd and Sissa Medialab</rights><rights>Copyright IOP Publishing Dec 2021</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c326t-a4ef9ba219967e37a4d60de85a7e2cdeddd93681d8ef51528ba61844d73b1abe3</citedby><cites>FETCH-LOGICAL-c326t-a4ef9ba219967e37a4d60de85a7e2cdeddd93681d8ef51528ba61844d73b1abe3</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktopdf>$$Uhttps://iopscience.iop.org/article/10.1088/1748-0221/16/12/P12037/pdf$$EPDF$$P50$$Giop$$H</linktopdf><link.rule.ids>314,780,784,27924,27925,53846,53893</link.rule.ids></links><search><creatorcontrib>Alonso-Arias, P.</creatorcontrib><creatorcontrib>Fuerte-Rodríguez, P.A.</creatorcontrib><creatorcontrib>Hoyland, R.J.</creatorcontrib><creatorcontrib>Rubiño-Martín, J.A.</creatorcontrib><title>The optical system of the Tenerife Microwave Spectrometer: a window for observing the 10–20 GHz sky spectra</title><title>Journal of instrumentation</title><addtitle>J. Instrum</addtitle><description>The TMS optical system is based on a decentered
dual-reflector system in a Gregorian configuration to observe with
an angular resolution of less than 2°. The primary goal
of the present study is to evaluate the final design and verify that
it satisfies the design requirements. We aim for low
cross-polarization (-30 dB), low sidelobe (-25 dB) levels, and a
stable beam in terms of shape (low ellipticity) and size over a full
octave bandwidth (10–20 GHz). We performed both ray-tracing and
full-wave simulations using the CST Studio software in order to
investigate the system behaviour. We gave special attention to the
beam frequency variation and polarization leakage. We have
characterized the effects on the radiation pattern produced by the
cryostat window. We present the final design of the TMS optical
system, as well as a complete study of the system's performance in
terms of cross-polarization, sidelobes, ellipticity and
beamwidth. We discuss the effects of sidelobes and study the need
for a baffle.</description><subject>Angular resolution</subject><subject>Ellipticity</subject><subject>Frequency variation</subject><subject>Instruments for CMB observations</subject><subject>Microwave radiometers</subject><subject>Modelling of microwave systems</subject><subject>Optics</subject><subject>Polarization</subject><subject>Ray tracing</subject><subject>Sidelobe reduction</subject><subject>Sidelobes</subject><issn>1748-0221</issn><issn>1748-0221</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2021</creationdate><recordtype>article</recordtype><recordid>eNqFkEFOwzAQRSMEEqVwBWSJdYjHSRyHHaqgRSoCibK2nHgCKU0c7LRVWXEHbshJSBsE7FjNaOa_P5rveadAz4EKEUASCZ8yBgHwAFhwD4yGyZ43-Fns_-kPvSPn5pTGaRzRgVfNnpGYpi1ztSBu41qsiClI201nWKMtCyS3ZW7NWq2QPDSYt9ZU2KK9IIqsy1qbNSmMJSZzaFdl_bRjgX6-fzBKxpM34l42xO1AdewdFGrh8OS7Dr3H66vZaOJP78Y3o8upn4eMt76KsEgzxSBNeYJhoiLNqUYRqwRZrlFrnYZcgBZYxBAzkSkOIop0EmagMgyH3lnv21jzukTXyrlZ2ro7KRmHSNAwplGn4r2qe885i4VsbFkpu5FA5TZauU1NblOTwCUw2UfbgawHS9P8Ov8DfQFn1nw_</recordid><startdate>20211201</startdate><enddate>20211201</enddate><creator>Alonso-Arias, P.</creator><creator>Fuerte-Rodríguez, P.A.</creator><creator>Hoyland, R.J.</creator><creator>Rubiño-Martín, J.A.</creator><general>IOP Publishing</general><scope>AAYXX</scope><scope>CITATION</scope><scope>7U5</scope><scope>8FD</scope><scope>L7M</scope></search><sort><creationdate>20211201</creationdate><title>The optical system of the Tenerife Microwave Spectrometer: a window for observing the 10–20 GHz sky spectra</title><author>Alonso-Arias, P. ; Fuerte-Rodríguez, P.A. ; Hoyland, R.J. ; Rubiño-Martín, J.A.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c326t-a4ef9ba219967e37a4d60de85a7e2cdeddd93681d8ef51528ba61844d73b1abe3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2021</creationdate><topic>Angular resolution</topic><topic>Ellipticity</topic><topic>Frequency variation</topic><topic>Instruments for CMB observations</topic><topic>Microwave radiometers</topic><topic>Modelling of microwave systems</topic><topic>Optics</topic><topic>Polarization</topic><topic>Ray tracing</topic><topic>Sidelobe reduction</topic><topic>Sidelobes</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Alonso-Arias, P.</creatorcontrib><creatorcontrib>Fuerte-Rodríguez, P.A.</creatorcontrib><creatorcontrib>Hoyland, R.J.</creatorcontrib><creatorcontrib>Rubiño-Martín, J.A.</creatorcontrib><collection>CrossRef</collection><collection>Solid State and Superconductivity Abstracts</collection><collection>Technology Research Database</collection><collection>Advanced Technologies Database with Aerospace</collection><jtitle>Journal of instrumentation</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Alonso-Arias, P.</au><au>Fuerte-Rodríguez, P.A.</au><au>Hoyland, R.J.</au><au>Rubiño-Martín, J.A.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>The optical system of the Tenerife Microwave Spectrometer: a window for observing the 10–20 GHz sky spectra</atitle><jtitle>Journal of instrumentation</jtitle><addtitle>J. Instrum</addtitle><date>2021-12-01</date><risdate>2021</risdate><volume>16</volume><issue>12</issue><spage>P12037</spage><pages>P12037-</pages><issn>1748-0221</issn><eissn>1748-0221</eissn><abstract>The TMS optical system is based on a decentered
dual-reflector system in a Gregorian configuration to observe with
an angular resolution of less than 2°. The primary goal
of the present study is to evaluate the final design and verify that
it satisfies the design requirements. We aim for low
cross-polarization (-30 dB), low sidelobe (-25 dB) levels, and a
stable beam in terms of shape (low ellipticity) and size over a full
octave bandwidth (10–20 GHz). We performed both ray-tracing and
full-wave simulations using the CST Studio software in order to
investigate the system behaviour. We gave special attention to the
beam frequency variation and polarization leakage. We have
characterized the effects on the radiation pattern produced by the
cryostat window. We present the final design of the TMS optical
system, as well as a complete study of the system's performance in
terms of cross-polarization, sidelobes, ellipticity and
beamwidth. We discuss the effects of sidelobes and study the need
for a baffle.</abstract><cop>Bristol</cop><pub>IOP Publishing</pub><doi>10.1088/1748-0221/16/12/P12037</doi><tpages>28</tpages></addata></record> |
| fulltext | fulltext |
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| ispartof | Journal of instrumentation, 2021-12, Vol.16 (12), p.P12037 |
| issn | 1748-0221 1748-0221 |
| language | eng |
| recordid | cdi_proquest_journals_2614803504 |
| source | Institute of Physics Journals |
| subjects | Angular resolution Ellipticity Frequency variation Instruments for CMB observations Microwave radiometers Modelling of microwave systems Optics Polarization Ray tracing Sidelobe reduction Sidelobes |
| title | The optical system of the Tenerife Microwave Spectrometer: a window for observing the 10–20 GHz sky spectra |
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