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Measured and predicted performance of a compensating subreflector

Langley, Richard J., Drinkwater, Arthur J., Parker, Edward A. (1979) Measured and predicted performance of a compensating subreflector. IEE Journal on Microwaves, Optics and Acoustics,, 3 (5). pp. 169-171. ISSN 0308-6976. (doi:10.1049/ij-moa:19790040) (The full text of this publication is not currently available from this repository. You may be able to access a copy if URLs are provided)

The full text of this publication is not currently available from this repository. You may be able to access a copy if URLs are provided. (Contact us about this Publication)
Official URL
http://dx.doi.org/10.1049/ij-moa:19790040

Abstract

The intensity and phase scattering patterns of a profile error-compensating mirror, 30 cm in diameter, have been computed at 34 and 68 GHz. The mirror had been used previously between 28 and 40 GHz to compensate for errors on the surface of a paraboloid 2.8 m in diameter. The results are compared with measured patterns and also the patterns needed to achieve maximum phase compensation. Good agreement was obtained between the measured and computed patterns. Generally the mirror compensated successfully for profile errors with correlation intervals greater than D/10. The residual phase differences between the required and computed patterns were consistent with those deduced previously from the performance of the complete compensated antenna. At 34 GHz they amounted to about 20° r.m.s., giving a shortfall in gain of (0.5 ± 0.3) dB. Results at 68 GHz suggest that the reflector could be operated efficiently at much higher frequencies.

Item Type: Article
DOI/Identification number: 10.1049/ij-moa:19790040
Subjects: T Technology
Divisions: Faculties > Sciences > School of Engineering and Digital Arts
Depositing User: Ted Parker
Date Deposited: 14 Mar 2014 09:57 UTC
Last Modified: 29 May 2019 11:59 UTC
Resource URI: https://kar.kent.ac.uk/id/eprint/38767 (The current URI for this page, for reference purposes)
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