Just be sure to check which ports your router has before you buy.Īs mentioned above, most routers use SMA connectors. Most 4G routers will use either SMA or TS9 ports, with SMA probably the more common. This is reflected in the fact that in 2019 pretty much all antennas for sale are MIMO. Nowadays with 4G coverage pretty much everywhere, you should ensure the antenna you buy is a MIMO (Multi Input, Multi Output) type. The higher the dBi number of the antenna, the higher the gain, but less of a broad field pattern, meaning that the signal strength will go further but in a narrower direction, as illustrated in the diagram below.īack in the days of 3G, an antenna with a single output was fine. Remember, 'gain' is simply stealing radiated energy from some directions to intensify others. 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). 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. 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 truth is, the answer to whether you need a higher or a lower gain antenna lies in your application.

This is true in some cases, but in certain applications too much gain can be a bad thing.

Some people think that a higher gain antenna will give them the strongest signal and highest quality connection. As new RF signal is not generated, the stronger signal is achieved at the expense of most other directions. The base for dBi measurement is an isotropic radiator (idealistic model that has the same value when measured in different directions) at radio frequencies.

The increase in signal using an antenna is called gain and is measured in dBi. So basically, antennas only divert, direct, or concentrate radio energy in some direction, they don’t create it. 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. As a companion to our 4G Router review, the following provides further information regarding the use of external antennas with 4G / LTE routers.

Triple biquad wifi antenna