Microwave Detector and Manufacturing Method Thereof and Stray Electromagnetic Radiation Suppression Method

A microwave detector, comprising:

• a reference ground;
• a radiation source having a feed point;
• a driving circuit, electrically connected with said feed point of said radiating source, wherein said radiating source, said reference ground and said driving circuit are arranged in order along a thickness direction of said microwave detector, wherein said radiation source and said reference ground are separated and spaced so as to form and define a radiating gap between said radiation source and said reference ground, wherein a spacing distance between said reference ground and said driving circuit is greater than or equal to 1/128λ, wherein λ is a wavelength of a radiated wave of said microwave detector;
• and
• at least one set of suppression fence posts, wherein said suppression fence posts of said set of suppression fence posts are provided surrounding around said driving circuit in a such a manner that said suppression fence posts are respectively and spacingly arranged on side portions of said driving circuit.

A manufacturing method of microwave detector, comprising the steps of:

• (a) etching a first metal layer that is attached on an upper surface of a lower base layer, so as to allow said first metal layer to form a gap and etching a second metal layer that is attached on a lower surface of said lower base layer, so as to allow said second metal layer to form a driving circuit;
• (b) forming at least a set of suppression fence posts surrounding around side portions of said driving circuit;
• (c) allowing a mounting side of an upper base layer, which has a third metal layer attached on an attaching side thereof, be mounted on said first metal layer;
• and
• (d) forming an electrical connection element extended from said third metal layer to said driving circuit through a notch of said first metal layer, wherein said third metal layer forms a radiation source of said microwave detector, said first metal layer forms a reference ground of said microwave detector, and said upper base layer forms a radiating gap of said microwave detector.