4.61 cm and 2.22 cm polarization rotators and feed horns for 150-foot paraboloid at the Algonquin Radio Observatory

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DOIResolve DOI: http://doi.org/10.4224/21274731
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TypeTechnical Report
Series titleERB; no. ERB-774
Physical description25 p.
Subjectpolarizer; band receiver; antenna; polarization
AbstractIn addition to the X-band polarization rotator (NRC ERB-735), two more polarizers were required for the J- and Ku-band receivers for the 150-foot paraboloid antenna at the Algonquin Radio Observatory. The specified restriction on variation in loss of VSWR with polarization rotation was rather stringent in order that source polarization measurements could be made. The design bandwidth 0.300 GHz centered at 6.500GHz for J-band, and 0.350 GHz centered at 13.50 GHz for Ku-band. Feed horns were also required for operation at the prime focus although the polarizers are suitable for Gregorian operation also. Calculated secondary patterns are presented for the prime-focus feed horns provided, as well as gain and aperture efficiency calculations.
Publication date
PublisherNational Research Council of Canada, Radio and Electrical Engineering Division
AffiliationNational Research Council Canada; Administrative Services and Property Management
Peer reviewedNo
NRC number22161
NPARC number21274731
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Record identifiera75f0304-6b87-42cc-bd8c-a2821b8feb8c
Record created2015-03-31
Record modified2016-10-03
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