Terminating transmission lines at either the source or the load end with a damping resistor is frequently used to improve the signal integrity of clock or control lines on printed circuit boards. While a number of termination variants may produce similar results in regards to signal integrity, the electromagnetic compatibility performance can vary due to different current and voltage distributions along the line. This thesis investigates the impact of transmission line terminations on radiated emissions.

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This thesis develops a novel method to predict radiated emissions measurements. The techniques used are based on standard Electromagnetic Compatibility (EMC) qualification test methods. The empirical data used to formulate the final results was restricted to pertinent data protocol waveforms however the entire method may be applied to any waveforms for which empirical radiated emissions have been measured. The method provides a concise means for predicting worst case radiated emissions profiles based on empirical measured data.