Problem with wireless Transmitter-reciever

[pratik069]

I am working on Tx Rx based on HT640 and HT648 on 434Mhz with ASK Module. I am in search of a good compatible antenna for the same because I always face problem of range while operaing it. Please suggest me something!!! Thank you...

 

[kj.singh]

I've used a simple 6" wire as antenna. Try with that, it will be quick too.
What range you are looking at to achieve?

-kjs

 

[abhichaotic]

I had used simply a 5"-6" wire as antenna, and the range was around 80-100 feet.

 

[pratik069]

Thanks for your replies. But is there any specification for the wire to be used?

 

[abhichaotic]

No need of any specific wire, I had just used a simple thin wire and that's all.

 

[kj.singh]

Correct, use any of the wire but keep the length in multiples of 6". Also, the module you are using should allow you to vary the field strength.

 

[ckshivaram]

We used radio antenna, which are very cheap and we can adjust the height of the antenna to our wish..... I got a very good and considerable length coverage with that too.......

 

[Syncopator]

Yagi antennas designed for the 70cm amateur band will give you more range than any variation of a vertical/whip.