Testing of 3-elements printed Yagi-Uda antenna

The paper is focused on testing of 3-elements printed Yagi-Uda antenna, which has been designed for 1 GHz. The tested parameters have been in particular voltage standing wave ratio (VSWR), bandwidth, directivity, gain and efficiency of the antenna. First describes Yagi-Uda antenna and subsequently the measurement methods and calculations of single parameters. For gain measurement has been used gain-comparison method. It has been necessary to design impedance matching for improvement of implemented antenna. The comparing of measured parameters with and without impedance matching has shown improvement of requiring parameters of implemented antenna by impedance matching.