In this paper is presented approach in planning the deployment of 868 MHz RF modules in Wireless Sensor Networks scenarios. This approach covers the site-general ITU propagation model calculation ...

The effect of rotor-blade rotation on a communication link between a helicopter and a satellite or a helicopter and a ground station could be severe depending on the type of antenna and the frequency ...

You may also think about a 'T-style' or 'Whip' (20 cm) dipole antennas from the Optional list when deployment of the ground plane is not feasible. This is an example of the Badge practical range ...