Though this doesn't broadcast per se as a radio, this being a Communications thread I thought I'd post about this device here.
We recently added a weBoost Drive 4G-X to our rig thanks to Wilson Electronics who make the device, which happens to be a hometown export from St. George, Utah.
It's a cell signal booster (up to 70db) with an external antenna that amplifies tower voice and data signals.
These signals are processed for broadcast inside the Montero through this antenna that's placed directly below where my iPhone mounts. This creates a WiFi hotspot for us.
I've noticed a strong increase in signal strength while camping in the Uintahs, with faster, more reliable service in data transfer.
I uploaded four videos from this remote location in less time than my home WiFi which is the fastest that Salt Lake City has to offer. So far, so good.