Electromagnetic band gap structure for achieving ultra-wideband suppression of synchronous switching noise

Abstract

The invention discloses an electromagnetic band gap structure for achieving ultra-wideband suppression of synchronous switching noise. The electromagnetic band gap structure is characterized in that arectangular notch is etched on each side of a power plane, and a microstrip line is led out from the middle point of the bottom of the notch; the microstrip line surrounds the power plane to the tailend of the next side in a counterclockwise direction, and the part of the microstrip line positioned at the next side surrounds the part of the microstrip line positioned at the side, which is led out from the rectangular notch at the side; the microstrip line is connected with the microstrip line of the adjacent structural unit to form an S shape; the central area of the power plane is hollow, and a square plane plate is inlaid in the central area; a rectangular notch is etched in the center of each of four sides of the square plane plate, and a microstrip line is led out from the middle point of the bottom of the rectangular notch and connected with the power plane. The electromagnetic band gap structure better reduces the lower cut-off frequency of noise suppression and effectively enlarges the bandwidth range of noise suppression, thereby achieving the ultra-wideband suppression of the synchronous switching noise between the power plane and a ground plane.

Description

technical field [0001] The invention relates to the technical field of electronic devices, in particular to an electromagnetic bandgap structure for realizing ultra-wideband suppression of synchronous switching noise. Background technique [0002] With the rapid development of microelectronics technology and communication technology, digital systems are developing towards higher speed and lower power, and the simultaneous switching noise (Simultaneous Switching Noise, SSN) between the power supply and the ground plane will cause serious signal and Power integrity issues. Since the SSN is mainly transmitted through the Power Delivery Network (PDN), in the design of the PDN, it is also important to suppress the propagation of the SSN in the wide stop band related to the good signal, so that the entire circuit system can work more reliably. one of the tasks. [0003] In order to suppress the propagation of SSN in the system, the SSN suppression methods currently designed incl...

AI Technical Summary

Problems solved by technology

The commonly used planar EBG structure is to etch a bandgap structure on the power plane to suppress synchronous switching noise, but the current electromagnetic bandgap structure has a narrow bandwidth and a high lower cutoff frequency, so it can suppress SSN to a certain extent. At the same time, how to better reduce the lower cut-off frequency of the electromagnetic bandgap structure and increase the suppression bandwidth is still the focus of research.

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