Slot fed switch beam patch antenna

摘要

An array antenna includes a patch arrayed on a metal backing plate and a plurality of inputs connected to the patch so as to radiate and receive an electromagnetic wave via the patch. The array antenna includes a transmitting/receiving circuit for feeding or receiving signals at a specific frequency to or from the array antenna. A waveguide divided into sections is provided to feed the electromagnetic wave to the radiating antenna. Each waveguide section produces a specific phase difference along the array antenna which accumulates and causes the electromagnetic wave to focus at a particular angle. Each waveguide section therefore produces a wave focused at a different angle, allowing the antenna to generate a plurality of focused waves.