Sometimes, an antenna's gain is measured relative to a dipole antenna dBd , which naturally has 2. To get the gain measurement in dBi, simply add 2. An isotropic antenna is a theoretical antenna that radiates power in every direction and has 0 dBi gain - its radiation pattern is a sphere. When gain is applied to the isotropic antenna, the radiation pattern and range begin to change.
If you lightly press on the top and the bottom of the dough, you are adding gain to the antenna. What happens? If you add more pressure to the dough the antenna begins to peek through the ends and the radiation pattern gets flatter and wider. Due to the gain you applied, the radiation pattern was changed from a sphere 0 gain , to a doughnut, to a doughnut pancake ultra-high gain. Low-gain antennas are best in areas where obstacles are reflecting and refracting the signal, causing it to constantly change directions.
This is common in areas close to bodies of water, dense foliage, and hills that are relatively close to the signal source.
High-gain omnidirectional antennas are best in areas with flat terrain. If you have ok signal because the signal source is quite a distance away a high gain omni antenna can help reach it without it greatly affecting performance.
As mentioned earlier, the higher you can get the outdoor omni antenna off the ground the better. Usually, the signal near the roof tends to be stronger due to fewer obstructions. To install a signal booster antenna, you would simply use the mounting brackets to mount it to a vent pipe or mounting pole. Just set it and forget it. When installing an omni-directional antenna, or any antenna really, you want to make sure there is enough separation from other antennas.
Signal booster antennas, indoor and outdoor, are required to have a minimum separation of 50 feet horizontal or 20 feet vertical. If the antennas are not properly separated, the chances of oscillation increase.
Oscillation means that the outside antenna picks up the indoor antenna's signal and tries to feed it back to the amplifier, and vice versa. This creates feedback or noise, like the unpleasing sound you get from putting a microphone too close to a speaker. As a result, performance degrades, and in some instances, the system shuts down.
If the two antennas are placed too close to each other, the cellular signals and the TV signals will interfere with each other, degrading each antenna's performance. To install two omni-directional antennas that are designed to capture different signals next to each other, you have two options:. Those who would benefit from an omni-directional antenna would need to purchase one separately. To save a bit of money, if you have an old TV omni-directional antenna laying around why not use it.
Will it work? This guide aims to help you figure out your own circumstances, and what you need to look for in a kit. If you have a particularly unique or challenging signal problem, you can also try customizing your kit further. They can receive signals from multiple cell towers and are best for boosting signal on many different carriers.
They are excellent in most situations where the existing outside signal strength is moderate to strong. If the outside signal is weaker than that, you may need the directional yagi antenna instead. We have a guide to tes ting your outside signal strength. An antenna with high gain will receive a more powerful signal from the cell phone towers.
An omni antenna is a good choice if you have moderate to strong existing outside signal, and you want to boost signal across multiple carriers. Yagi antennas are powerful directional antennas. A yagi antenna needs to be set up pointing in the direction of the cell tower, and because it is directional it will only pick up signal in that direction. If you need to boost signal coming from different directions, it is possible to set up more than one yagi antenna. The antennas would need to be placed at least 10ft apart and must not be pointing towards each other to avoid creating oscillation feedback.
The multiple antennas are then connected to the amplifier inside using a signal splitter. Contact us for more help with this. Account Blog Log In. Call us! Contact us today: How to Aim a Yagi Directional Outside Antenna Directional antennas, unlike omnidirectional antennas, must be aimed in order to receive the strongest signal from your cellular carrier s.
Being off by a little will still work just fine. In almost all situations, the antenna should be level and even with the horizon. Do not attempt to aim the antenna up over a roof or nearby obstacles. You should attempt to aim the antenna before deciding where to permanently mount it. Once you know what direction the antenna should be pointed, try to find a location on the building so that the antenna is pointed away from the building.
For example, if you need to aim your antenna North, you should mount the antenna on the North side of the building pointed away from it, not on the South side pointed over the building. This could be a disadvantage for overall indoor coverage. Directional antennas used indoors typically have lower Gain, and as a result, have a lower front-to-back and front-to-side lobe ratios. This results in less ability to reject or reduce the interference signals.
Also, because the antenna arrays have to face in the direction where the coverage is desired, it can make mounting of Directional antennas a challenge. Wide-band directional antennas would be the best choice when available signals are weak. These antennas are recommended more often than an Omni-Directional antenna as it has double the Gain and it also works with the frequency bands commonly used for 4G LTE. Construction sites would be a great fit for a wide-band Directional antenna, in order to increase signal capacity in high utilised areas.
As the locations of these sites are temporary, they would not usually have a wired internet connection. Construction companies might opt for a broadband internet solution which can be mobile and used at another location when the project is finished. Employees at the construction sites need to be able to send things like construction drawings, timesheets, reports, camera surveillance, inspections and recordings via a secure VPN internet connection.
Omni-Directional antennas are best suited for applications requiring good all-round coverage. They are a good choice for most users as they are easy to install and provide consistent coverage over a broad area, servicing multiple providers. Directional antennas are good for applications that require the available RF energy to be focused in a particular direction.
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