Antenna factor measurements of double ridge horns with frequency 200MHz to 1GHz in EMC testing chambers

Double ridge horns with frequency 200MHz to 1GHz are hard to be transfer to calibration sites for measuring 1mAF because of its' big dimension. In order to solve the problem, three different approaches at local custom EMC testing chamber are provided in the paper and several experiments have been done. Comparison the measurement results of custom's EMC testing chamber with calibration value, a good agreement has obtained in transfer antenna method with the maximum discrepancy being 2.0 dB at 950MHz.