Mimetized Printed Yagi-Uda Antenna Array for TDT Reception

A printed Yagi-Uda antenna composed of a planar driven dipole, a planar reflector and two planar directors is presented. The antenna is fed by using a printed transmission line formed by two parallel printed lines that act as a balun. The printed Yagi-Uda is well matched within the TDT operating band, exhibits compact size, and provides gain values close to 6 dBi. In order to increase the gain, a 4-element vertical array of printed Yagi-Uda antennas is proposed. The performance of this uniform linear vertical array is similar to that of commercial wire Yagi-Uda antennas. Due to the compact size of the elements, the vertical array can be easily mimetized as a chimney or ventilation pipe. The proposed design reduces the visual impact of classical antennas used for TDT reception, being especially attractive for historical buildings or residential houses in which aesthetic appearance is of great importance.