Antenna Type

Basically we have several types of antennas that can be used in Wireless Metropolitan Area Network (WMAN), namely:

• Omnidirectional Antenna - Antenna is usually used in Access Point (AP). This type antenna has a 360-degree radiation pattern.
• Sectoral antennas are usually used in Access Point (AP). Usually have a higher gain than omnidirectional antenna, but the area is on the cover is usually only about 90-180 degrees.
• Directional Antenna (Antenna Steering) is usually used on the client side. Usually has a very high gain and are directed to the Access Point (AP). The example used in the Wireless Internet, such as satellite dish antennas, Wajanbolic e-goen or antenna cans.

Some countries, including Indonesia, requires that all radio systems in the certification. This means that only the antenna on the test & in the certification along with his radio that can be used. Unfortunately, the application of such rules would be very difficult because it is very easy to change the configuration tool.

Ref : http://opensource.telkomspeedy.com/wiki/index.php/WiFi:_Tipe_Antenna