Patch Antenna

Description
Patch antennas are also known as panel, flat panel or microstrip antennas. They are formed by overlaying two metallic plates, one larger than the other, with a dielectric sheet in the middle. A panel 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. The assembly is usually contained inside a plastic radome, which protects the antenna structure from damage.
Patch antennas are broadly used for a point-to-point long haul system. These antennas are highly focused. Therefore, they are perfect tools if you want to send signal for a very long distance.

Advantages
1. The microstrip antenna has a weatherproof CAT5/CAT6 for external quick connection, allowing rapid installation and easy quick servicing.
2. With the internal connections made prior to deployment, the antenna is mounted at the site reducing deployment time.
3. Because they are flat, thin and light, patch antennas are often hung on walls or ceilings where they remain visually unobtrusive and blend easily into the background.
4. Panel antenna is usually encased in white or black plastic, not only to protect the antenna, but also to make it easy to mount.

Principle
The simplest patch antenna uses a patch which is one-half wavelength long, mounted a precise distance above a larger ground plane, sometimes using a spacer made of a dielectric between them. Electrically large ground planes produce stable patterns and lower environmental sensitivity but of course make the antenna bigger. It is common for the ground plane to be only modestly larger than the active patch. When the size of a ground plane is close to the radiator it can couple and produce currents along the edges of the ground plane which also radiate. The antenna pattern becomes the combination of two sets of radiators.

Jinchang Company is professionally in high frequency antennas manufacturing and selling for 28 years. Main products include GPS/GLONASS/COMPASS antenna, GSM/CDMA/GPRS antenna, WIFI antenna, DAB-DVB antenna, combo antenna, connector and interface cable. Patch antennas produce hemispherical coverage, spreading away from the mount point at a width of 30 to 180 degrees.