Altair Engineering, a company that markets Engineering and Design software sends out a monthly news letter.
My email address ended up on one of their lists.
This is an extract from one of mailings:
Does holding a wireless car key-fob to your head extend the range?
|The chip. The loop around the perimeter is the antenna for the 315 MHz signal|
|Gain chart, plan view. Chip floating in space.|
|Gain chart, side view|
Then a human body was added to the simulation.
|It was interesting that a fat, healthy side-lobe forms off the human's "weak side". I never would have anticipated that. The weakest signal is behind |
|The optimum positioning for the fob was to place it on TOP of your head.|
If signal decreases by distance^2, then 10dB should triple the distance the signal can travel and still actuate the circuit in the vehicle.
This work was not replicated for people who cranial cavity is filled with a vacuum or air.