Miniaturized Dual-Symmetrical Beam Antenna with Split-Ring Slot Structure

摘要

The characteristics of microstrip antennas that has dual-symmetrical beam radiation pattern presented in this paper. Microstrip patch antenna is designed to work on a Terrestrial Digital Video Broadcasting (DVB-T) band at 550 MHz. The proposed antenna has an impedance bandwidth of 10.75 MHz at -10 dB. In this paper we proposed a structure called Split Ring Slot (SRS) which have functions as a radiator and as an inductive component that contributes in the antenna miniaturization simultaneously. Antenna analysis is carried out with full wave simulations, and the antenna prototypes was fabricated and measured for validation. From the simulation results it is obtained dual-symmetrical beam radiation pattern with directivity values in each lobe of 2.50 dBi and 2.12 dBi in 1° and 181° beam direction, respectively. In terms of dimensions there is also a significant reduction in dimensions by 60% compared to antennas without SRS.