antenna

[WilliamM]

Could you recommend us a half-wave antenna to use with the RFEs?

[msellers]

We would recommend the Nearson S-151 or S-152 Antennas in the AH Series, with reverse SMA Connectors.
I believe these to be 1/2 wave and not ground plane dependent. Also, from this web site there are some other
1/2 wave dipole antennas that should work (with less gain).

http://www.nearson.com/Connector_Mount_Antennas.htm

We have tested with Antennas from Pulse Engineering, but they seem to mostly have 1/4 wave antennas.
The one that gets shipped with our current kits is model W1027, with a gain of 3.2 dBi.
With our end device circuit board in close proximity, this antenna works well.
Others we have tried from Pulse are: W1030 (good for indoor use, but less gain), and W1038 (4.9 dBi gain).

http://www.pulseeng.com/index.php?271

I think DigiKey carries both of these manufacturer's antennas.