EM Analysis of a Propagation Channel in the Sub-THz Band for Many-Core Architectures

This paper presents an electromagnetic (EM) analysis of the propagation channel in the case of a Wireless Interconnects Network-on-Chip (WiNoC) used in many-core architectures. First, the advantages of the wireless communications for such type of systems are presented. These wireless interconnects are realized on a CMOS structure using a silicon substrate. The literature review discusses the constraints of integrated antennas and propagation channels on silicon. These problems were confirmed by measurements on prototypes manufactured in V band (40-75 GHz). We propose a solution (by the addition of an absorption layer around the silicon substrate) that provides flat transmission levels over large bandwidths. Simulations for different network scenarios formed by monopole antennas in the Sub-THz band are exposed. The improvement brought by our smaller antennas can insure reduced latency, higher data rate and routing flexibility for broadcast applications, which proves the ability to profit from the WiNoC in a many-core environment.