How do I increase the range of the Parallax 433 MHz RF Transmitter/Receiver ?

Joe

Hi:

How do I increase the range of the Parallax 433 MHz RF Transmitter/Receiver ?

I need to capture sensor data , but I need more than 500' ,
Is it possible to increase up to 800, 1000, 1200 or more ?

Thanks, Joe

Mike Green

These are low power devices that legally are constrained to transmit relatively short distances. Theoretically, you could attach a larger antenna both to the transmitter and receiver to increase your range. Best would be a simple 1/4 wave dipole which would be roughly 17-18cm. You'd need to tune it for maximum output at the transmitter and maximum received signal at the receiver. A ground plane would also help depending on the circumstances. The Amateur Radio Relay League publishes an excellent Handbook that includes a chapter on antennas. They also publish a separate ARRL Antenna Book, both chock full of information on antennas. Check their website (www.arrl.org).

There are a variety of companies that manufacture similar transmitter/receiver pairs that operate at higher power for more range. They may also sell larger antennas, also to help with range.

LoopyByteloose

Some antennas are directional. That would help get more distance. Also, this information has been around a long time. Try your public library for ARRL literature and save some bucks. Just because the book was written in 1965 doesn't mean it is not useful for antenna design.

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PJAllen

Could be you can track down some info for fashioning a corner reflector (retro-fit.)