Method for EMC antenna factor temperature error correction

In order to reduce the influence of the outfield environmental temperature and improve the measuring precision of electromagnetic compatibility (EMC) test equipment, a method for antenna factor temperature error correction was presented. Firstly, according to the principle of two antenna calibration with 1 m distance, the antenna receiving characteristic influenced by temperature control device made by radome material under the condition of near field was theoretically deduced. Combined with the simulation analysis and test results proved that the test error can be controlled in the permitted range by using the temperature control device. Secondly, on this basis the antenna factor variation with temperature and temperature error correction surface for typical antenna was obtainedby the actual test. In the end, the method was verified by comparing the test result uder standard conditions with the test result under the open area test site (OATS) condition. The results prove that this method can expand the environmental temperature range of use from -40℃ to 50℃ by antenna factor temperature error correction on the premise of not reducing measurement precision, and suitable for the antenna factor temperature error correction in EMC double cone antenna and log periodic antenna and the double ridged horn antenna, etc.