Design of Unbalance Slot Printed Dipole Antenna with Triangle Parasitic Element for DTV Receiver

Abstract

This article presents an unbalanced slot printed dipole antenna design with triangle parasitic elements for using with DTV receivers. The application of printed dipoles with different arm sizes was combined with center slot modification. This slot is the main point of an antenna that creates a wide frequency range property. In addition, the technique that has been used was adding triangle parasitic elements to extended frequency range and improvement of gain suitable for digital TV systems in Thailand. The designed antenna was 135 mm. wide and 250 mm. with a maximum gain from simulation and measurement of 5.78dB and 4.65dB, respectively. The prototype antenna has an average return loss less than -10 dB in the 441.05MHz-889.89MHz frequency band that covers all DTV system bandwidth in Thailand.