A Design of Microstrip Log Periodic Antenna Unit

This article proposes a microstrip log-periodic antenna that can work in the frequency band from 4 to 12 GHz. The radiating part of the log-period antenna consists of a pair of patches with Koch curve structure placed vertically on both sides of the dielectric plate. Each part of the patch contains 9 monopoles in a staggered arrangement and consists of a coaxial cable. In addition, in order to improve the gain of the antenna and easily achieve impedance matching without affecting the radiation of the antenna, the coaxial parallel to the dielectric plate is derived above the rectangular feeder as the feeder. The simulation results show that when the microstrip periodic antenna is working, the frequency range of VSWR <2 is 4GHz-12GHz, and the gain is about 8dB. The antenna has the characteristics of small size, light weight and high isolation.