Interesting PCB Layout Design Guidelines for Signals above 20Gbps

About PCB material properties, safe space between tracks, impedance of VIA & PADs

Links:
– AN 672: Transceiver Link Design Guidelines for High-Gbps Data Rate Transmission: https://www.intel.com/content/www/us/en/programmable/documentation/nik1412632494319.html
– PCB Design Considerations for FPGA Accelerator Cards: https://www.xilinx.com/support/documentation/application_notes/xapp1316-design-considerations-fpga-accelerator-cards.pdf
– Decibel (Wikipedia): https://en.wikipedia.org/wiki/Decibel
– Power / Voltage Loss calculators: http://www.sengpielaudio.com/calculatorVoltagePower.htm
– Isola PDF: https://www.isola-group.com/wp-content/uploads/PCB-Material-Selection-for-High-speed-Digital-Designs-1.pdf
– Isola website: https://www.isola-group.com/products/all-printed-circuit-materials/fr408hr/
– Losses in PCB Transmission Lines: https://www.protoexpress.com/blog/losses-in-pcb-transmission-lines/
– Review of Server PCB Layout & Schematic: https://youtu.be/Sv9-YidkC7M