Research of circular disc ultra wideband EMC measuring antenna

Electromagnetic compatibility (EMC) measuring antenna can be used for EMC radiation disturbed and noise immunity test. Its bandwidth requirement is relatively high, and the antenna needs to cover a wide frequency range. In this paper, the conventional circular disc ultra wideband antenna was expanding researched, and a new method to increase the high frequency of the circular disc antenna was introduced. A small disk monopole was added to the original antenna. Simulation and experiment results show that this method can greatly improve in maintaining the high-frequency antenna-bandwidth, in order to address the trouble of replacing several antennas for EMC measurement. In addition, the problem of wind load for EMC measuring antenna was also taken into account. The corresponding solutions were proposed by simulation results. Holes and slots were punched on the conventional circular disc antenna, or to simplify the circular disc antenna to loop antenna. Analysis shows that the wind load can be reduced. These methods can improve the mechanical characteristics of the antenna on the basis of maintaining the good performance. The improved antennas are more applicable to EMC measurement.