What type of connector is this?
There are 3 main types of connectors used to connect CarKits with antennas. The 3 main connectors are pictured below.
TNC

Socket (Female) Plug (Male)
Mini UHF

Socket (Female) Plug (Male)
FME-Nipple
(soon) (soon)
(c) Tim Merrell 1997-1999. www.fan.net.au/~mrvfone