Design of Horn Feed for Parabolic Reflector Antenna
Abstract : HFSS provides automatic, accurate, and efficient solutions to overcome these challenges, making it the ultimate tool of choice for antenna simulation. Basic performance characterization such as return loss, input impedance, gain, directivity and a variety of polarization characteristics can be analyzed in HFSS. Key post-processing features such as the ability to overlay the 3D far-field pattern on the antenna geometry can provide the designer invaluable insight and direct correlation between the antenna and the resulting radiation pattern. HFSS also offers electric and magnetic field visualization both in the near-field and far-field providing design understanding that is not easily available through measurement.
Pyramidal horn is used as feed-horn. The feed horn is executed by rectangular waveguide figure 5.2.The horn dimensions Ah, Bh are aperture dimensions, Rh is horn depth. The case when polarization plane of feed horn coincides with YZ plane is considered. The dimension of waveguide cross section satisfies a uniqueness condition of wave TE10: a< ? <2a, where ?– wavelength.
Electro Magnetic simulation is a valuable tool in antenna design and platform integration providing the designer the ability to virtually design and evaluate what if scenarios as well as verify the final manufactured design. With multiple simulation technologies and powerful automated adaptive mesh refinement providing gold standard accuracy,
The proposed system involves multi mode horn feed design for parabolic reflector in order to reduce the cross polarization in the resonating frequency of 2.79 GHz in the Ansoft HFSS tool.
A reflector antenna can receive a spherical wave from any points of far, intermediate and near field zones space. Let a spherical wave source be located in the point P shown in figure 5.4. The amplitude of the wave electric field of is equal Ei. It is necessary to calculate power Pi entering the waveguide.
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