As a retrofit, one could simulate the signal that a GPS antenna would see and feed it to the cable. I expect that the starlink signal itself is quite resistant to jamming because of beamforming.

The specific task is modifying a Symmetricom antenna to work with a Symmetricom GPS receiver, which has a puzzling attribute of supplying 12V to the antenna instead of more common 3.3V or 5V.

Garmin has received Brazilian National Civil Aviation Agency (ANAC) validation for its GTN 650 and GTN 750 series touchscreen avionics and GPS antennas. The approval enables the installation of ...

There is no longer a need to radiate either GPS signals or interfering signals. The purpose of this test bed, called BAnc de Caractérisation des Antennes Réseaux Antibrouillage (BACARA), or test bed ...

But active antennas amplify the signal to get past the loss in the extra wiring; with a little bit of hacking, you can add an external active gps antenna to just about any GPS unit. Find out how ...