| || Beam Switching Cylindrical Array Antenna System for Communication
Author : Singh, O.K. ;Krishna Murty, T.G.;Hara Prasad, R.V.;Merugu, L.N.;Misra, V.C.
Source : Defence Science Journal ; Vol:48(4) ; 1998 ; pp 403-412
Subject : 621.38 Electronics;681.2 Instrumentation
Keywords : Radome ;Power dividers;Printed dipole radiating element;Communications
Abstract : The beam switching cylindrical array, which is a unique system, has been designed and developed to cover 360° in azimuth plane by generating 16 beams with specified elevation coverage.In this design, the concept of fast aperture selection (4 x 4) in microseconds from the total cylindrical array has been realised successfully to meet the requirement of point-to-multipoint communication. The components of the array, viz., radiating elements, powder dividers, switches, etc., are designed in printed circuit type, and hence, objectives of lightweight and ease of reproducibility are achieved. The lightweight of the array makes it accessible for easy mounting at a specified height for achieving longer communication range. Finally, a low-loss radome is incorporated to protect the array from environmental conditions. The various parameters, viz., return loss, gain, and switched-beam radiation patterns were measured over a bandwidth of 300 MHz in L- band and typical measured results are presented in this paper .