It's frequently communicated that when working with signals in the Ghz range, routing is extremely important to signal integrity. Pretty much any inclusion of unnecessary stubs is out of the question, traces must be length matched to some fraction of the wavelength, vias backdrilled, etc.
That being said, I've been tasked with an unconventional goal of creating a high speed (1.5Ghz) signal interface along a large circular ring (e.g. a slip ring) of a maximum 3 inches in circumference. The signal will be introduced at one random point in the ring and picked up at a fixed location at another place in the ring.
Specifically, I'm not quite too sure what the implications are / if it is possible to operate at that level of speed given the self induced jitter from the phase shift. Assuming the following, are there any opinions out there on if this is possible or not? If so, what additional mitigation measures can be taken in this particular scenario?
- Annular ring impedance matching to termination
- Gold on gold contact to introduce signal
- EQ/DI/OS SC IC (ReDriver) immediately after for insertion loss
- Clocked Retimer eventually after to hopefully save the signal