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.

A beam-steerable antenna with an offset spherical reflector for earth station

Abstract: This paper proposes a newly devised beamsteerable antenna which may suggest a future large scale earth station antenna for satellite communications. This is an offset type spherical reflector antenna with two specific subreflectors and a trireflector beam-waveguide feeder. It can steer its radiation beam without moving the main reflector and the feed horn. An experimental model antenna of 2 x 3 m at 52/34 GHz corresponding to a 20 m class antenna at 614 GHz has demonstrated its excellent electrical performance over wide scanning angles.

Design of multiple-edge blinders for large horn reflector antennas

Abstract: Attaching blinders to the sides of pyramidal horn reflector antennas and other large aperture antennas is one method of controlling high sidelobes for horizontal polarization. This paper describes analysis and design procedures for arriving at a useful multiple-edge blinder for reducing undesirable sidelobes of a pyramidal horn reflector antenna. Several blinders have been designed and tested for use with a pyramidal horn reflector antenna. They are directed at reducing a high sidelobe near 90\deg in the azimuth plane where levels (referred to the main lobe) of -52 dB at 3.74 GHz and -58 dB at 6.325 GHz are presently typical. A 14-edge blinder designed using these techniques reduced these levels by 20 dB at 3.74 GHz and 12 dB at 6.325 GHz and did not significantly degrade antenna performance for other angles and other polarizations.

Method for measuring insertion loss of feed network

Abstract: The invention discloses a method for measuring the insertion loss of a feed network. The insertion loss of the feed network comprises feed horn heat loss and network insertion loss. In the method, the method for performing comparison by utilizing a standard gain horn is put forward, and the insertion loss of the feed network to be measured is obtained by measuring the gain of the feed network to be measured and subtracting the gain of the feed network from the gain of the feed horn. The method provided by the invention is simple and feasible, and has a popularization and application value.

On the size reduction of planar Yagi-Uda antenna using parabolic reflector

Abstract: A planar Yagi-Uda antenna using the parabolic reflector is designed and compared to that of using the conventional straight reflector. Both antennas are designed to have the same performance. Simulation results show that the parabolic reflector design can reduce the occupied antenna area by about 29.4% as compared to that of the straight reflector design, while the antenna directivity and efficiency are retained at 7.16 dBi and −0.70 dB, respectively. Thus the parabolic reflector design is suitable for designing compact directive antennas in the low-profile devices.

Electro-Magnetic Band-Gap feed overlapping apertures for multi-beam antennas on communication satellites

Abstract: An `EBG antenna (Electro-Magnetic Band Gap)' is built with a semi-reflective screen over a set of horns feeding a reflector. A clever application of the partial spreading of the electro-magnetic field in such a structure is to provide `overlapped radiating apertures', which generate `overlapped beams' when feeding a reflector. This is a unique single-antenna solution, fitting with multi-beams missions from satellite which require low gain ripple over a regional coverage, e.g. for high data-rate communication in Ka-band. A prototype has been optimised and built, as a co-operation between Thales Alenia Space France & XLIM/Antenna Lab, supported by space agencies ESA & CNES. Adding a very light meanderline polariser (honeycomb based) transforms the alternated orthogonal linear polarisations into orthogonal circular ones, coping with most recent missions.