Improvement of the Quasi-Yagi Antenna Perfomances by Using an Ends-fed Dipole Driver

摘要

A novel approach to improve the quasi-Yagi antenna performances by using the so-called ends-fed dipole radiator is presented. To illustrate this idea a cylindrical prototype operating at 790 MHz is developed and tested. Since the area around the radiating arms is free of any conductors, the proposed radiator is a good candidate to create high polarization purity of radiation. The measured results have revealed that such a driver is able to achieve an effective area reduction to 20% with enhanced up to 17 dB front-to-back ratio without decreasing the bandwidth.