Radiated emission of a bent microstrip line using hertzian dipole method

Electromagnetic Interference (EMI) and signal integrity (SI) issues have generated challenges to the high speed digital circuit designer as the operating clock frequency of the system continue to increase to accommodate broadband applications. Discontinuity due to microstrip bents which appear frequently in most VLSI design requires thorough understanding on the current distribution in order to generate the immunity and emission characteristic of the circuit. This paper is on estimating the radiated emission on both the straight and bent microstrip line using the expanded hertzian dipole approach which will be validated with computer simulation results. It is found that the expanded hertzian dipole approach which is initially applied on wire can predict the emission on microstrip line well when proper adjustment is made.