Topic
Feed horn
About: Feed horn is a research topic. Over the lifetime, 2395 publications have been published within this topic receiving 26548 citations. The topic is also known as: feedhorn.
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TL;DR: In this article, a simplified analytical method to predict the field distribution in the focal region of dual reflector antennas having circular symmetry is presented, which is used to analyze the ability of the antenna in focusing the incident wave.
Abstract: A simplified analytical method to predict the field distribution in the focal region of dual reflector antennas having circular symmetry is presented. The method is used to study the field distribution at the subdish and in the focal plane, and hence the ability of the antenna in focusing the incident wave. Experimental results obtained on a 2.6-m spherical Gregorian reflector operating at 9.0 GHz agree well with theoretical ones.
5 citations
02 Jun 1975
5 citations
Patent•
13 Feb 1985TL;DR: An axisymmetrical planar-parabolic reflector antenna has a paraboloidal reflector dish (10) and a planar reflector (13) into which the feed horn illuminating the dish is recessed so as to reduce (and preferably minimise) aperture blocking caused by the antenna's feed horn as discussed by the authors.
Abstract: An axisymmetrical planar-parabolic reflector antenna has a paraboloidal reflector dish (10) and a planar reflector (13) into which the feed horn (11) illuminating the dish (10) is recessed so as to reduce (and preferably minimise) aperture blocking caused by the feed horn (11). In its upper frequency band, the feed horn (11) has a vanishing electric field at the edge of its aperture which suppresses edge currents at the mouth of the feed horn (11) and along the planar reflector surface (13), thereby preventing the flow of ground-plane currents in the planar reflector (13) which would degrade the antenna's performance. In its lower frequency band, the feed horn's choke surrounding the mouth of the feed horn (11) effectively accomplishes the edge current suppression. At a given frequency band, the feed horn (11) produces virtually equal E and H-plane radiation patterns.
5 citations
21 Jun 1998
TL;DR: In this article, an improved formula for calculating the location of the phase center was proposed for symmetrical front-fed or Cassegrain reflector antennas, which is valid also when the radiation field of the feed has large phase variations.
Abstract: The aperture efficiencies of classical symmetrical front-fed or Cassegrain reflector antennas can be factorized in different sub-efficiencies. Of these, the phase efficiency is the only one which depends on the location of the feed relative to the focal point of the reflector, provided the reflector is in the far-field of the feed. We present an improved formula for calculating the location of the phase center which is valid also when the radiation field of the feed has large phase variations. The new formula is applied to two different versions of the hat feed.
5 citations
11 Jul 2010
TL;DR: In this paper, a box-type horn array antenna is investigated and an upper pyramidal surface is added to the array in order to increase the gain and to strengthen the construction.
Abstract: A box-type horn array antenna is investigated - a 3 × 3 array was simulated, and a linear 3 E-plane coupled horns array was simulated and measured. An upper pyramidal surface was added to the array in order to increases the gain and to strengthen the construction. It is shown that the gains of the proposed antennas are 11 dB and 5 dB higher than that of conventional horns having the same sizes, respectively.
5 citations