Tilted beam microstrip antenna array conformai to cylindrical section

This paper presents the design of tilted beam microstrip antenna array conformai to a cylindrical section. The antenna array is designed using corporate feed network and beam tilt is achieved by progressive phase shift to 4 elements at Ku frequency band. The beam of 4 elements antenna array is tilted with tilt angle of 37 degree with respect to broad side. The effect of radome thickness and side metallic wall on conformal tilted beam array is studied. The measured results of array with cavity and conformal to cylindrical section for different radome thickness are presented. The antenna with radome thickness of 5 mm achieves maximum gain of 9.3 dBi and half power beamwidth of 32 degree in pitch plane and 74 degree in roll plane of the cylinder.