Looks like there are clones of the active one on eBay
Some even have the circuit schematic int he photos, which looks similar to the original.
Search for “Active ADS-B 1090Mhz PCB Antenna”
Looks like there are clones of the active one on eBay
Some even have the circuit schematic int he photos, which looks similar to the original.
Search for “Active ADS-B 1090Mhz PCB Antenna”