Evaluation of a TEM Horn Antenna Prototype for Radiated Immunity Test in Close Proximity

We designed a shortened exponentially tapered TEM horn for use in close-proximity radiated immunity test, and optimized the antenna characteristics by numerical simulations with the finite integration technique. A first prototype of the antenna was fabricated and the reflection characteristic of the antenna and the field uniformity of the test area were evaluated. The results of these experiments and numerical simulations show that the proposed antenna exhibits a low VSWR and broadband radiation characteristics, and satisfies the requirements of the IEC standard.