Patch Antenna 2.45 GHz

A Patch Antenna (also known as a rectangular microstrip antenna) is a type of radio antenna with a low profile, which can be mounted on a flat surface. It consists of a flat rectangular sheet or "patch" of metal, mounted over a larger sheet of metal called a ground plane. They are the original type of microstrip antenna described by Howell. A patch antenna is usually constructed on a dielectric substrate, using the same materials and lithography processes used to make printed circuit boards.

Advantages & Disadvantages of Patch Antenna

Formula for Dimension Patch Antenna

Front View

Ground Plane

Perspective View

Use AppCAD for suitable dimension feeding point

SIMULATION RESULT

Result Return Loss in CST

ACTUAL RESULT

Result by using Network Analyzer

Attachment:

Patch Antenna 2.45 GHz

Measure the return loss by Network Analyzer

**I got the few problems such as a characteristic of board. I used FR-4 board and the thickness board write in spec, "1.60 mm", but when I measured I got "1.568 mm". That's why the desired result very different with the actual result. This antenna also had modified by using cooper sticker. Actually, the result not get like this. I heard from the Technologist PCB Laboratory explanation, normally in Radio Frequency should used Rogers Board or normally called Duroid Board. Its more accuracy specification and its very expensive.

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