Design and performance improvement of shaped-beam parabolic reflector antenna for small region coverage by non-symmetrical array feed technique

Mitigation of Feed Horn Overlapping Condition for Multi-beam Parabolic Reflector Antenna

“…However, the feed displacement of ∆x and ∆y can only show a one-dimensional (1D) beam direction. In order to obtain the two-dimensional (2D) beam plot, the distances from the centre of the reflector to the caustic point can be estimated by the following equation, as described in [12]:…”

“…(17) For the practical multi-beam allocations shown in Fig. 7, the corresponding feed positions are determined by equations ( 15), ( 16) and (17). Through calculation, the resulting beam and feed positions are summarized 3.…”

“…This validates the adequateness of the contoured beam that was achieved using 'no overlapping feed' arrangement. Method Description [17] Malaysian coverage using rectangular horn and array feed.…”

“…In the previous works on achieving Malaysia coverage by multi beams, feed horn overlapping problem has occurred. One technique used to address this issue was to replace the horn with a patch antenna [9][10][11][12]. However, in that work, the proposed mitigation technique was through the implementation of planar arrays, but a detailed analysis of how to solve the original overlapping horn issues was not provided.…”