| The paper presents some considerations related to the radiated emissions from automotive area of interest. Firstly the equipment used for tests dedicated to radiated emissions is presented. Afterward some considerations on the test equipment, used in a semianechoic chamber are made. Characteristics of the horn antenna used to accomplish tests dedicated to radiated emissions within the range 0.8…1.6 GHz, along with some aspects related to design and simulation are also presented. The analysis of the electric field in the antenna and respectively of the electric field distribution in the remote field area was performed for three different frequencies (1.2GHz, 1.4GHz, 1.6GHz). Tests conditions are also described. Discussions are made with respect to the recorded data. The results of tests concerning the radiated emissions for a board display are presented, both for the horizontal and respectively vertical polarizations. Tests were made firstly for the initial hardware structure and problems related to the vertical polarization were noticed. Measures to improve the display operation are analyzed. Results of tests after the application of improvement measures are presented. Conclusions related to the improvement of the board display operation are deduced. |
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