Since the antenna has a horizontal beam width of degrees or less, there is plenty of necessary coverage with minimal bleed through. Yagi antennas span longer distances and are generally used in an outside environment. The main purpose of these antennas is to reach places that an omnidirectional antenna would not be able to reach.
Highly directional antennas are used for long distant point-to-point communication. They are used to bridge networks between two buildings that are far apart. Because these antennas are high gain, they provide the most focused and narrow beam width. Instead of a street light shining down, it is more of a spotlight shining in a specific direction. The two main highly directional antennas are Parabolic Dish and Grid. Dish antennas look similar to the TV dish antennas that you would find in a home but are often much larger in size.
Grid antennas can also vary in size, but they look like a grill and are designed for outdoor environments with higher winds.
A third type of highly directional antenna is the Sector antenna. Sector antennas consist of a few highly directional antennas, placed back-to-back, that are working together to provide omnidirectional coverage.
Each antenna that is part of the array provides a pie shaped coverage pattern. Sector antennas can be mounted high over the terrain and tilted slightly downward, with the tilt of each antenna at an appropriate angle for the terrain it is covering. Therefore, the sector antennas are able to cover much larger areas because they can be directed in any direction the coverage is needed.
Compared to omnidirectional antennas, sector antennas have greater throughput since there is more than one antenna in use. These antennas are generally used for cell phone coverage and at sports venues. All antennas have their strengths and weaknesses. The omnidirectional antenna is great for general coverage and is more cost effective because of the general coverage it provides in a central location.
The directional antennas are best for getting signal to a specific area, be it near or far. They provide more of a round-shaped signal pattern, which will radiate the WiFi signal closer to the ground.
A high gain antenna might stretch the signal out too far, causing the signal to be better further away and weaker within your backyard.
If the goal is to extend the signal even further, like to a field, use a directional antenna, and point it in that direction. To bridge your internet connection with another building, two directional antennas are needed. The distance between the buildings will dictate which directional antennas you should use. For example, if the buildings are about a mile away from each other, a Yagi or panel antenna will work just fine, but if the buildings are much further apart, a grid antenna would be the best option.
Ideally, the antennas should be mounted on the roof of each building. Point to multipoint networks wirelessly connect multiple buildings to a central location. To create such a network, you would need numerous directional antennas and one omnidirectional antenna. College campuses are an example of point to multipoint networks.
The directional antenna should be mounted on the roof of the central building to distribute the signal in all directions.
Every other building will require you to mount a directional antenna on the roof and point it in the direction of the omnidirectional antenna. Like point-to-point networks, it's critical to have a clear line of sight between the omni antenna and the directional antennas. By default, the adapters utilize rubber duck antennas. Unfortunately, those antennas are not always the best at capturing long-range WiFi signals. If the adapter has a detachable antenna, you can replace it with a mini panel antenna, a regular panel antenna, or a Yagi antenna to capture a signal from further distances.
As mentioned earlier, WiFi devices communicate with each other through radio waves. Similar to all waves, radio waves are measured in frequencies — the rate, typically Hertz Hz per second, at which data is sent and received within a specific interval.
The most common frequencies used in WiFi communication are 2. As you can see, lower frequency waves have longer wavelengths. Since the wavelength is longer, WiFi antennas that utilize lower frequencies have an easier time penetrating obstacles, such as floors and walls, allowing them to transmit information further. The only drawback is that information is transferred at a slower rate. In contrast, shorter wavelengths travel much faster, enabling high-speed data transmissions.
Each WiFi antenna is built differently to match the frequency and wavelength of the signal that is being transmitted. In other words, a 2. Additionally, some WiFi antennas are built to utilize both frequencies known as dual-band antennas. Depending on the antenna, they can operate under one frequency at a time or at the same time. Polarization depicts the orientation in which the wireless signal is being transmitted with respect to the ground.
EM waves propagate with linear, circular, or elliptical polarization. The most common polarization method used in WiFi communication is linear. Linear polarization can take two forms: vertical and horizontal.
For the best signal possible, the polarization between antennas must match. If the radio wave's polarization does not perfectly match that of the WiFi antenna, there will be a decrease in signal. Additionally, the signal will be eliminated if the polarization of the WiFi antenna and the radio waves are the complete opposite of each other. Simultaneously, the yagi antenna is simple to build with its compact size and is lightweight. A panel antenna is also one of the types of antenna for Wifi. Since they are directional antennas, they transmit and receive radio signals from a particular direction.
But unlike both yagi and grid, instead of a narrower transmission beam, a panel antenna has high-gain applications , and hence, it covers a larger area. Portability, low profile, and ease of installation make flat-panel antennas well suited for LEO satellites.
It also serves as a high gain connectivity transmitter , allowing for extremely high gain in a very modest array of antennas. You can also strengthen your signal from the get-go by opting for one of the best routers on the market. We hope you have learnt all you need to know about the different types of antenna for WiFi. We also hope that this article has helped you make the best choice for yourself.
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