Another option is a cheap "reflector" that will help concentrate the signal from the transmitter. As crude as they seem, they do add range.
Foldable Antenna Range Booster Amplifier Signal Windsurfer For DJI Phantom 3/4 | eBay
As you get further away, unless you are downhill, you will need to be higher, particularly in a built up area, to get decent range. In around houses or other buildings, you will not get a lot of range at 100'.
Foldable Antenna Range Booster Amplifier Signal Windsurfer For DJI Phantom 3/4 | eBay
As you get further away, unless you are downhill, you will need to be higher, particularly in a built up area, to get decent range. In around houses or other buildings, you will not get a lot of range at 100'.