non line of sight wireless module for 500m

[bassa]

Dear All,

Can you suggest me the range of good "non line of sight" wireless modules for commercial applications that need to transmit and receive the data about 500m range (very few information not for continuous bulk data transfer)

Your help is great appreciated.

Thank you
bassa

 

[jiripolivka]

To give you an advice, I would need to know what real environment you have; what types and sizes of obstacles, etc.
If the wireless modules are specified to transmit over 500 M over line of sight, including antennas, then they often can do it also without LOS.
You possibly can consider using more directive antennas, and locating them so that the RF signal can reflect from a building, etc., to get through.
To cover 500 M, it may be easy to locate the transmitter and receiver with antennas to places with LOS or such that the RF signal can pass. Then you will need only DC and data lines longer from your "base" which may be easier to install.
Most wireless modules at 915 MHz promise several mile range with < 1 W RF power, at 2.45 GHz, 0.1 W is often OK, at 5.8 GHz, even less. Using good antennas and terrain survey is the secret of a successful transmission. Be ready to experiment!

 

[E Kafeman]

If it is fixed locations and directive antennas can most low power transceivers handle 500 meter even with minor objects along LOS.
Range limit is often due to local regulations for allowed frequency band and max TX power.
A possible low power chip: Axsem
Try to estimate worst RF link attenuation + needed S/N, from that calculate required TX power and antenna gain.

 

[bassa]

To give you an advice, I would need to know what real environment you have; what types and sizes of obstacles, etc.

Thank you for your suggestions

Mostly urban cities with buildings and other obstacles.

Ex: Transmit some warnings to the moving vehicles cover around 500m circle, effectively.

If it is fixed locations and directive antennas can most low power transceivers handle 500 meter even with minor objects along LOS.

Thanks for the suggestions

Yes base location is fixed.