자동차 전자파 내성시험 측정방법에 관한 연구

The Broadband electromagnetic radiation generated by the vehicle can be measured using a vehicle-to-antenna spacing 10m or 3m, two alternative reference antenna distance are permissible 10m or 3m from the vehicle in the European Specification(EEC and ECE), but can be used only 10m method in the SAE and CISPR Specification until a recent date. Generally the difference between the limit for the radiated emissions measured at 10m antenna distance and 3m antenna distance is10dB in theory, but test result is very different according to the test vehicle and test frequency. We can find multiple antenna positions are required if the length of the vehicle is greater than 3dB bandwidth of the antenna for the 3m measurement distance