I have a question about FCC part 15 certs. Using the Particle Cellular B series SoM, they have a "Grant of equipment authorization" to use the module as an end device. Link to the module docs below.
Within the terms, it says you must use the same type of antenna and less than or equal to the gain that it was certified with.
My question is, if I use an extension cable, say to get it outside a machine for better signal, does this violate the FCC cert? I do not want to pay for re-certification. The docs don't really say anything about this.
Adding cable does become part of the antenna and could affect things. So I'm not sure if this is valid or not. I'm using the same type of antenna, in fact it's the exact antenna it was certified with, but with a longer cable.
The antenna in question is the Taoglas FXUB63. It is a flat flex PCB (flat patch) antenna with a U.FL connector. So can I use a U.FL to U.FL extension cable and still be within the Grant of equipment authorization? Or maybe even a U.FL to SMA and an long SMA extension and then back to U.FL. You get the idea.
You can find the FCC certification docs here: https://docs.particle.io/datasheets/certifications/certification/