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What is a microstrip patch antenna?

  • A.A metal patch printed over a grounded dielectric substrate
  • B.A slot cut in the ground plane of a printed circuit board and fed by a line
  • C.A wire antenna printed on a flexible substrate and folded into a small volume
  • D.A resonant cavity machined from metal and covered with a dielectric window

Answer: A

A patch antenna is a conducting area, usually rectangular or circular, printed on one side of a thin dielectric whose other side is a continuous ground plane. It radiates from the fringing fields at its edges. Slot antennas in a ground plane are a related but distinct family, printed wire antennas are another, and a machined cavity is not a printed structure at all. Being flat, light and made by ordinary circuit board processes is what made the patch so widely used.

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