A Log-Periodic Bow-Tie Dipole Antenna

Absct: Taking place th1e elements of normal LPDA, a log-periodic bow-tie dlipole antenna is pmposed in this paper in order to reduce the size of the antenna, which operates in a broadband of 0.4GHz2GHz. Both of this antenna and the normal LPDA are designed and simulated with the application of CST MICROWAVE S DIO''' software based on the Finite Integral Method. The simulation results and analyses are presented, to show that the antenna achieves the purpose of miniature by compressing the necessary lateral and loongitudinal size to 2/3 of the normal log-periodic antenna. while Keeping its radcliation charactenrstics such as VSWR, rad'iate pattern and gain nearly Constant.