NDLI: Low Sidelobe Corrugated Horn Antennas for Radio Telescopes to Maximize <formula formulatype=inline><tex Notation=TeX>${rm G/T}

Content Provider	IEEE Xplore Digital Library
Author	Teniente, J. Gonzalo, R. del Rio, C.
Copyright Year	1963
Abstract	Improving the G/T_s of radio telescopes and radiometers and their associated receive subsystems translates into increasing the ground received signal-to-noise ratios. Therefore, low noise amplification with cooling operation is required. However, the system designer must select an appropriate feedhorn antenna with low sidelobes and an adapted illumination at the edge of the reflector since the noise originated from the surroundings will be collected by the horn and added directly to the overall system temperature. Lower sidelobes help also to improve the spillover efficiency of the radio telescope which will lead at the same time to an increase of the gain. Three new corrugated horn antenna designs with Gaussian-shaped patterns in the main beam are presented in this paper. These designs were made for specific radio astronomy and radiometry applications. These designs are shorter than their similar performance conical corrugated counterparts. Two of the designs present sidelobe levels below -40 dB and as a consequence they improve the G/Ts relationship. Measured performance results are also presented. All of the designs have been included in latest generation radio telescope and radiometer systems.
Sponsorship	IEEE Antennas and Propagation Society
Starting Page	1886
Ending Page	1893
Page Count	8
File Size	1861757
File Format	PDF
ISSN	0018926X
Volume Number	59
Issue Number	6
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2011-06-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Horn antennas Noise Antenna radiation patterns Radio astronomy Antenna measurements Temperature sensors low sidelobes Corrugated horn antennas high efficiency low crosspolarization level
Content Type	Text
Resource Type	Article
Subject	Condensed Matter Physics Electrical and Electronic Engineering

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