A printed tiny-RHCP antenna for direct broadcast application

Abstract

The present study unveils a printed antenna design that achieves high gain and exhibits right-handed circular polarization (RHCP). The antenna is intended for use in direct broadcast satellite systems, operating within the frequency range of 12.20 to 12.70 GHz. The specified configuration is achieved by etching a pair of indistinguishable isosceles triangles from the vertex of a geometrically regular square. A circular geometric structure consisting of sixteen isosceles triangles scaled in proportion is meticulously engraved from the central point of the recently obtained geometry. The meticulous etching enhances the antenna’s effective length, which in turn helps achieve improved parametric performance at the desired frequency. The antenna under consideration was simulated using a SONNET EM simulator, cross-verified by the CST microwave studio, and afterward, it was fabricated using a cost-effective PCB laminated Rogger 5880 material. The antenna under consideration significantly reduces size, achieving miniaturization of 20.20%. The antenna is resonated at 12.52 GHz, and it exhibited a satisfactory circularly polarized gain of 8.46 dBic. It also provides a CP bandwidth of 0.54 GHz, capable of covering the entire DBS band. Additionally, it offers 97% radiation efficiency and 86% aperture efficiency. The antenna also offers 23 dB/m correction factor, which highlights its minimal EMI/EMC effects. All the measured outcomes align with the results achieved from the simulator.