Hybrid T-shaped monopole / dielectric resonator antenna as EMI sensor

The increased use of high frequency electronic equipment in modern day technologies causes electromagnetic interference with each other. To avoid this, the detection of unwanted electromagnetic radiations is required in industry where electromagnetic interference and compatibility (EMI/EMC) problems are quite an important issue. For EMI measurement, it is required to place a sensor to receive the radiation from the equipment. In this paper, a dielectric loaded T-shaped ultra wideband monopole antenna is designed and used as sensors for measuring electromagnetic interference. The performance of a sensor depends on its antenna factor, which is the ratio of the incident electric field on the antenna surface to the received voltage at the load end. Here the antenna factor of the same antenna is presented for the desired and cross polarization of the incident field. The results for antenna factor show an ultra wide bandwidth with the cross polarization isolation better than 86 dB / m for the T-monopole / DRA as EMI sensor. The simulated return loss characteristics show well agreement with the measured data of a prototype antenna.