Only when the radio receiver is physically large will the "ground plane" be formed.
The lobby floor does the same for the ground plane.
To form an image of the antenna above it, the ground plane need not be grounded to the Earth.
However without a ground plane the gain is reduced and the radiation resistance increased.
The hand and body of the person holding them may function as a rudimentary ground plane.
The ground plane doesn't have to be a continuous surface.
The structure itself, a composite of little more than ground plane, support and roof, thus becomes the building.
There should be a break in copper between this strip, and the main ground plane of the circuit.
Copper pour is commonly used to create a ground plane.
According to the architects, the ground plane is crucial as it has to attract people to walk through the space.