Three-Dimensional Radiation Characteristics of a Pyramidal Horn-Reflector Antenna

Abstract

A widely used Bell System pyramidal horn‐reflector antenna, used in terrestrial radio relay systems, has been characterized over all space. We give the dB contours for principal (as opposed to cross‐polarized) measured radiation patterns and compare them to contours of calculated patterns for this antenna at 4 GHz. In addition, we present the contours for 6‐GHz measured principal patterns, describe the measurement method, and discuss the causes of departure of the measured from the calculated patterns.

Simple Analytical Representation of Antenna Spatial Radiation Patterns With Application to the Pyramidal Horn-Reflector Antenna

“…The measured data of the frontal hemisphere of its 3D radiation pattern at 4 GHz consists of 91 φ cuts made every 1° with a sampling rate of 0.08° totaling about 200,000 measured points. 9 The sin θ, φ polar plot of its radiation distribution for horizontal polariza- tion is shown in Fig. 4, truncated at 60 dB below the main beam peak, while the accompanying 3D pattern is shown in Fig.…”

Far-sidelobe contamination of the Bell Laboratories H I survey

“…Although the beam size is too large (2!5x2?5) for investigations of small-scale structure, the survey provides an invaluable tool for studies of the large-scale structure of neutral hydrogen both in the galactic disk and in the galactic halo. As the survey was executed with a horn telescope possessing very low-amplitude far sidelobes, it has been used to correct for sidelobe contamination in H I studies using other telescopes (Lockman et al 1986;Burton 1992). Therefore, the Bell Laboratories Survey data both directly and indirectly form the basis of much of our understanding of the distribution of H I, particularly at high latitudes, and the uncertainties in the data must be carefully considered.…”