EM Emissions
EMA has extensive experience in electromagnetic emissions (EM emissions) from a wide variety of sources, including cables and individual electronic components such as in aircraft avionics or wireless communications.
One example of this work is in our calculation of the far-field EM emissions generated by internal electronics units in a wireless communications station. In our calculation, we took near-field EM measurements of each individual unit and used our state-of-the-art EMA3D® software to generate the far-field emissions results. The near-field measurements were performed with simple table-top equipment and are relatively inexpensive to obtain.
EMA3D has a powerful platform on which far-field EM emission predictions can be obtained from near-field measurements using an equivalent Huygens surface. Using this platform, a variety of emission scenarios can be simulated in an efficient, low cost way.
We show example results from our far-field EM emissions simulation in Figures 1 and 2.
Figure 2 shows far-field emissions identified and plotted by individual contribution from each of the five unit emitters in the frequency domain. The total far-field emissions are the sum of the contribution from the individual emitters. EMA’s powerful software suite allows for a variety of plotting and simulation scenarios.