![]() The main types of semi-directional antennas are Patch/Panel and Yagi. It is common to use semi-directional antennas in a campus like environment since they can provide a network bridge between two buildings. A good way to think of how the semi-directional antenna radiates RF is to think of it as a street lamp shining down on the street. ![]() Semi-directional antennas are used for short to medium distance communication indoors or outdoors. Semi-directional antennas are designed to direct the RF signal in a specific direction for point-to-point communication. While not typically used for outdoor purposes, omnidirectional antennas can be used on top of a building to communicate with buildings on either side. These antennas are great in office and home settings since their broad coverage allows clients to move around without losing signal. This type of coverage is great for point-to-multipoint environments because it can be placed in the center of multiple client devices, providing central communications capabilities to all the surrounding clients. A perfect omnidirectional antenna would radiate RF signal like a theoretical isotropic radiator, meaning the signal is radiating equally in all directions. Your finger is the antenna and the bagel is the coverage it provides. Another way to think about the coverage is to imagine putting a bagel on your finger as if it were a ring. ![]() Similar to how a floor lamp radiates light, omnidirectional antennas radiate radio frequency (RF) in all directions. In these types of environments, omnidirectional antennas, specifically Dipole antennas, are commonly found. This is because they are small - or not visible at all - and oftentimes built into the network’s router or access point. When you enter a home or office setting, you don't generally think about the type of antenna that is being used. The three main antenna types are omnidirectional, semi-directional, and highly directional. ![]() While there are many types of antennas, all of them have the same purpose: producing radio waves to send information through the air. Different types of antennas can be found anywhere from small office settings to outdoor camping grounds. Several varying types of antennas exist for WiFi, each with a specific purpose for how and when they should be used. ![]()
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