Ultra high frequency log periodic antenna for digital TV application

Currently, the needs of communication system with a wide bandwidth is large enough. One antenna that can be used to realize communication with a wide bandwidth is log periodic antenna. To observe the effect of element length, the distance between elements, and the width of dipole elements used in log periodic antenna then do research to design and realize the antenna log periodic dipole array (LPDA) and log periodic dipole array fractal Koch (LPDAFK) at frequency of 287-324 MHz. The results of the implementation of LPDA and LPDAFK antenna give different results with simulations. On the measurement of LPDA and LPDAFK antennas, antenna operating frequency shifted to a higher frequency. LPDA antenna is working on frequency 295-310 MHz and 360-385 MHz, while the working frequency of the antenna fabrication LPDAFK are 292-304 MHz, 346-354 MHz and 404-414 MHz.