Broadband Log-periodical antenna with omni-directional radiation pattern in the horizontal plane

In this paper, a new design for a Log-periodic antenna with omni-directional radiation pattern in the horizontal plane and broad-band characteristics is investigated. This antenna covers the 500-3000 MHz band with VSWR <; 3:1 and the gain better than 0 dBi with maximum deviation ±1.5 dB in the entire frequency bandwidth.