Reduksi Crosstalk dan Reduksi EMI dengan Menambahkan Guard Trace

Abstract

The client system design space is becoming more aggressive every year and all of these designs have more signal traces that are directed at a certain area, either on the microstrip or strip line. This applies to the motherboard system level as well as the substrate package level. Guarding high-speed signals by co-planar grounded traces is a traditional way of reducing crosstalk and EMI (Electromagnetic Interference). This grounded trace will usually run along with the high-speed signal across the channel. But because the speed is getting higher, most of the interface margin is still limited by crosstalk, hence the proposed "Elevated Guard Trace Technique" which can reduce crosstalk and EMI which can improve the overall system performance. This innovative technique of guard trace is commonly used in microstrip layers which are routed with high-speed signals to significantly minimize emission or EMI. Any design that targets cost savings will minimize the total number of layers in the PCB (Printed Circuit Board) or in the substrate package.