Investigation of the radiation mechanism for high-speed connectors

In this paper, the radiation mechanism of the high-speed connectors are investigated by the distributive power radiation formulation and characteristic modes theory. It is shown that hotpot can be identified by the distributive formulation method and the un-symmetry of geometry will cause unbalanced mode current.

I. Introduction

High-speed connectors are usually used for transmitting signals between printed circuit boards and will cause electromagnetic interference (EMI) problem up to several gigahertz [1]–[4]. Although full wave simulation can provide powerful tools for analyzing the EMI characteristics of different configurations, it will be very hard to extract the embedded radiation physics. One possible way to investigate these physics is to relate the radiation characteristics with the distributive geometry of the radiator.