A Wideband Tightly Coupled Array for Omnidirectional Pattern Synthesis

is work presents the design of a wideband circular tightly coupled array for omnidirectional pattern generation. e proposed array works over an 8:1 bandwidth, providing very high performance in terms of active re ection coe cient, realized gain, and omnidirectional patterns with reduced ripples. e array is composed of 32 low-pro le, self-complementary, bow-tie elements displaced around a metallic mast. e capacitive coupling between neighbouring elements and the implementation of a properly designed frequency selective surface allow for increasing the electrical length of each antenna while compensating for the inductive e ect of the metallic mast, according to the tightly coupled and connected arrays theory. A cover layer is then inserted to improve the average gain on the azimuthal plane. Time-domain simulation results con rm the validity of the proposed approach and implementation.