the antenna arrangements form a spatial phased array able to track a satellite in an elevation plane by mechanically rotating the antenna arrangements about transverse axes giving rise to generation of respective elevation angles and changing the respective distances between the axes in a predefined relationship with the respective elevation angles the combining splitting circuit provides phasing and signal delay in order to maintain pre configured radiating parameters the arrangements can be mounted on a rotating platform to provide azimuth tracking the system provides dynamic tracking of satellite signals and can be used for satellite communications on moving vehicles application_number US 75208804 A description turning now to fig3 a u2013 c there is shown schematically a side view of an antenna unit with four antenna arrangements in different elevation angles in accordance with an embodiment of the invention thus fig3 a represents the case of the low elevation angle e 1 31 the antenna unit 30 has four arrangements 32 u2013 35 with corresponding projection a 1 u2013 4 where a 1 is a corresponding projection of antenna arrangement 31 a 2 is corresponding projection to antenna arrangement 32 and so forth the projections are seen as continuous aperture a 1 to a 4 from the observation angle of the satellite 36 note that the distance between each two respective antenna arrangements is d as shown in fig4 a when the elevation angle is increased to say e 2 41 e 2 gt e.