Here is a list of External WiFi Antennas that will significantly increase your WiFi Speed and boost your WiFi Range. That will significantly increase WiFi range. So if your router does support the removable antenna, you can get a higher gain antenna like a 5dbi or a 7 dbi.TutorialOr, use a higher gain antenna on the receiver, it has to be 8.5dB gain or more. Follow the link for the tutorial. A long-range antenna for 2.4 GHz wifi 802.11 b/g/n frequencies. Easy build yagi that gives at least 15dbi. Home Blog NetworkingLong Range Yagi Antenna 19 Element 2.4GHz: Yagi Antenna 19 Element (Yagi in a drainpipe).As new RF signal is not generated, the stronger signal is achieved at the expense of most other directions.Some people think that a higher gain antenna will give them the strongest signal and highest quality connection. The base for dBi measurement is an isotropic radiator (idealistic model that has the same value when measured in different directions) at radio frequencies. So basically, antennas only divert, direct, or concentrate radio energy in some direction, they don’t create it.The increase in signal using an antenna is called gain and is measured in dBi. If you do both, it will quadruple your range to nearly 1.5km Monopole Antennas Gain: 6 dBi at best Half-power beamwidth: 45 deg x 360 deg Biconical Antennas Gain: up to 4 dBi Half-power beamwidth: 20-100 deg x 360 deg /2 Dipole (Half-Wave Dipole Antenna) Gain: 2.15 dBi Half-power beamwidth: 80 deg x 360 deg Log Periodic Antennas Gain: 6 to 10 dBiThinking about antennas? You need to be thinking about gain!With any antenna, the apparent increase in signal is not an amplification of signal, but it is the act of redistribution of available Radio Frequency (RF) signal into a preferred direction.
High gain antennas need to be pointed in a preferred direction to send RF signal so that limited signal can be intensified in desired location, as illustrated below.In addition, the positioning of an antenna is key:However, if you want to broadcast evenly to a whole room (or give omni-directional access to your wireless signal), you do not want much gain (or it’s directivity). Which Antenna and Gain Do I Need?If you want to focus all of the signal to direct it to a distant target, then the high gain antenna is definitely the best choice. The +(number)dBi is said to have double the (number) gain and the -(number)dBi is creating loss, not gain following the same pattern. You would say this no-gain situation is 0 dBi.Omni-directionality is said to have no directivity (preference for any direction), as opposed to having the signal concentration in a particular direction, and the amount of signal in a preferred direction is quantified as gain. Antenna Gain ExplainedThe fact that we can't immediately see the RF waves sometimes confuses people, but don't worry, once you know what gain really is, you can determine if more (or less) is better for any particular application.An antenna that radiates energy equally in all directions and has no preference for radiation in any direction is said to have "no gain". The truth is, the answer to whether you need a higher or a lower gain antenna lies in your application. This insight will give you the confidence to choose which antenna is best for your application. An understanding of where and how the antenna will be deployed is key to help determine which environmental parameters are important and in turn which antenna would suit you best.Some antenna manufacturers, such as Ubiquiti and Poynting, publish their Radiation patterns. Understanding the radiation pattern of an antenna can be a great way to identify important parameters, like the beam width of an antenna.Moreover, you can be looking at two different antennas that have the same gain according to the spec sheets, but one of them can have the potential to perform better than the other. Even omnidirectional antennas can potentially have their 'blind spots' or 'nulls' in radiation patterns. Live homeHere are some of their tips on what to look for when choosing an antenna:Have the manufacturers performed measurements at all frequency bands and angles, using anechoic chamber or qualified antenna test range?Have you used manufacturer measured results? If these are trustworthy and comprehensive - do they provide performance vs freq. Manufacturers such as Poynting dedicate their whole career to designing antenna systems because it is such a complex subject. Tips When Choosing AntennasAs you can see gain is an important parameter in any antenna. It may increase the total signal strength but it also can increase the noise in the signal. Having a bigger antenna does not always increase usability of the signal. In addition, certain radios work better transmitting more power and using smaller antenna while others like to transmit less power but use larger antenna.
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