High Bandwidth and Multi-Channel Power over Coaxial Filters for Automotive Low-Voltage Differential Signaling Interconnect

We propose high bandwidth and low-cost multichannel power over coaxial (PoC) filter configurations for an automotive LVDS interconnect. To enhance the bandwidth of PoC filters toward a higher frequency range, we have designed a small filter pattern on the PoC filter electrodes and demonstrated a filter property improvement of about 5 dB at 10 GHz without degradation of the insertion loss of the signal line in a simulation. We have also designed a multi-channel PoC filter configuration with fewer components and a smaller mounting area and demonstrated sufficient filter performance in a simulation. These structures were fabricated on test boards and demonstrated by measurement.