I'm installing an Android tablet as a carputer in my '97 Hunk-o'-Junk Crapwagon, and saw a reddit post detailing a carputer install where OP linked his Jaguar's antenna to a USB GPS adapter. OP also mentioned that adapters for such connections are available for cheap on eBay, but doesn't seem to be responding to further questioning.
I understand that antennas are a complicated subject that I would do well to bone up on, but this would at best amount to a nice touch to an otherwise low-priority kind of project. Would finding a way to connect my car's AM/FM radio antenna to the GPS module inside a tablet appreciably improve the reception?
Obviously, it would be far from optimal, but would it be anywhere near worth the trouble? Even if it boosted the signal, would it translate into a noticeable benefit for the speed and accuracy of location services? I'm betting the tablet would work okay unassisted anyway, but the idea of utilizing a pre-existing connection appeals to the scavenger in me.