What type of signal should I use for limiting range to 600ft?

[Lucille2]

Hello guys,

I am totally new to EE and in need of info on a project I am working on. I am trying to broadcast a short range signal and the distance the signal can travel needs to be limited.

So let's say I want the signal to reach up to 600ft. I need it not to be easily received by other receivers at distances past that. I was just wondering if that even exists or what type of signal I should use, radio or otherwise.

Feel free to send me elsewhere too if this is not the proper forum to be asking these beginner questions.

Thanks

 

[skeptic2]

There are a lot of considerations in such a project besides range. One of the considerations is frequency. Will it be operating on one of the broadcast bands? Is this to be a campus based transmitter to broadcast only on campus?

Generally its very difficult to limit the range of a transmitter to a specific distance but there are a number of techniques that can be tried. It is important to know the frequency band, the transmit power, the antenna type and the antenna height you plan to use.

 

[otto9K9otto]

Please specify why you need limited range: security or interference or ? The respective solutions are vastly different.