Before revision: An individual microstrip antenna consists of a patch of metal foil of various shapes (a patch antenna) on the surface of a PCB (printed circuit board) , with a metal foil ground plane on the other side of the board.
After revision: An individual microstrip antenna consists of a patch of metal foil of various shapes (a patch antenna) on the surface of a PCB , with a metal foil ground plane on the other side of the board.