Currently, I am working on a project that involves navigation using trilateration. This method requires knowing the distance between one point and three reference points. I need a transmitter that can broadcast an RF signal that is ONLY used for its strength and has a range of at least 300 ft. The transmitter does not need to have anything other than itself broadcast.
Any suggestions?
Thank you
Use a computer router and a USB antenna - Linksys is a good cheap option.
They have a range of about 200' inside of a building and about 300' in a free space.
The USB antenna is very directional and the weak microwave signal won't cause any type of interference with other radio services.
Use lap top computers and use the signal strength bar and calibrate it with a signal analyzer / generator.
A service monitor and 900 MHz would be a good second choice.
1 watt in the free - above 900 MHz band in the USA would work ok as long as nothing else in the neighborhood interfered with it.
You would need to make a field survey ahead of time before you attempted to do your experiement.
All signals reduce at the square of the distance away..
Simple physic's 101