Applications of Computer Modeling in Electromagnetic Compatibility (EMC) Tests (Part1) ESE – Andrew Rusek P9. Example 3: Two Cell Phone Antennas and Two Receiving Objects Receiving Objects Cell Phone Antennas Grounded Object Suspended Object Two Cell Phone Antennas, Field Directivity for 0.8 GHz, The Same Phases Two Cell Phone Antennas Field Directivity Changes for 1.5 GHz, Opposite Phases Two Cell Phone Antennas, Field Directivity Changes for 1.5 GHz, The Same Phases P10. Two Cell Phone Antennas, Field Directivity for 0.8 GHz, Opposite Phases P11. Opposite Phases The Same Phases Grounded Object Grounded Object Summary: EMC measurements are performed to protect electrical equipment from potential interfering signals caused by uncontrolled and intentional sources. The presentation includes examples of simulated basic Controller Area Network (CAN) experiments, including conducted and radiated emissions. Simulated CAN immunity tests are also shown. In addition, results of computer simulations of EM fields generated by GHz frequency basic structures are presented. Necessity of testing GHz devices is due to high speeds of clocks of computers and signals of new cell phones. At GHz frequencies the distribution of EM fields emitted by Devices Under Test (DUT) become non-uniform. Computer simulation of experiments can be the way to reduce time required to find the DUT field directivity. P7. Example 2: Simulated EMC Radiation Test for Three Radiating Objects Test Antenna Radiating Objects Field Directivity Tests for 0.6 GHz, 1.0 GHz, and 1.5 GHz P8. Field Pattern of Three Radiating Objects (0.6 GHz) All Sources in Phase Field Pattern of Three Radiating Objects (1.0 GHz) All Sources in Phase Field Pattern of Three Radiating Objects (1.5 GHz) All Sources in Phase Current Distribution in Various Segments of Test Antenna Versus Frequency. All Sources in Phase changes of current magnitude show effects of directivity variations with frequency