Analysis of Methods to Reduce Side Radiation Influence from a Satellite Communication Station Antenna on Communication Quality

The article discusses ways to reduce the side radiation of the antenna, which mainly relates to the angular directions adjacent to the main radiation direction of the satellite communication station antenna. The methods of antenna radiation suppression in deterministic directions are analyzed: suppression of narrowband (broadband) signals, asymmetric reduction of antenna side radiation. The effect of narrowband signal suppression for the presented circuit is determined by the fact that the compensation channel has an additional passage length of the electromagnetic wave, approximately equal to 2F, where F is the focal length of the paraboloid reflector. Therefore, this scheme allows to suppress interference effectively only if its relative frequency band is much less than The broadband signal suppression scheme implies a sharp increase in the frequency band at which the compensation scheme is effectively triggered, and as a result, the path lengths of the main and compensation channels are aligned. To reduce antenna side radiation asymmetrically, a method for purposefully deforming the reflector edge region profile is considered, namely, a parabolic reflector circuit with two additional asymmetric reflectors placed on top and below the main reflector. The most acceptable results from a practical point of view will correspond only to the situation when the two conditions are met: 1) reflector deformation areas necessary to achieve the planned result fully correspond to the configurations from the set of shield structures forming the reflecting surface itself, 2) the deformation of the profiles obeys a linear law. A combination of methods to reduce the near-field radiation of a satellite communication station antenna at the design stage will improve the quality of communication.