The Yagi antenna: quick guide

The Yagi antenna: quick guide

The Yagi antenna is perhaps the most widely used on the roofs of houses, and more or less directly we have all had to deal with it, if only for television reception. Here we discuss the use of the Yagi antenna in the cellular network world.


  1. The Yagi antenna: a very common solution
  2. Yagi Logarithm Antenna
  3. Yagi Super Logarithm Antenna
  4. Double Yagi Super Logarithm Antenna
  5. Does my repeater need a yagi antenna?


Antenna Yagi: le tre varianti del nostro catalogo


1.The Yagi antenna: a very common solution

The Yagi antenna, also called Yagi-Uda because it is named after its inventors, Hidetsugu Yagi and Shintaro Uda, is a type of broadband antenna, widely used for television reception and cellular telephony. Within the world of radio waves, we find ourselves here in the UHF (Ultra High Frequency) band, where frequencies are between 300 and 3000 MHz.

Obviously, we will not delve into the aspects of TV reception here but we will talk about how the Yagi antenna has become an indispensable component of GSM repeaters as it is the best antenna for capturing signal at a distance with a greater angle than the fellow satellite dish.

As an initial consideration, let's say that most of our GSM repeater kits have a panel antenna as the external antenna, with a very wide angle (almost 180 degrees) and a reduced ability to receive/transmit the cellular signal over distances greater than about 1.5km.

That is why in many situations a GSM repeater accompanied by a Yagi antenna is needed to solve reception problems. We currently have three variants in our catalog and we review them below. Regarding the whole universe of GSM amplifier antennas, on the other hand, we have published a very interesting article.


2.Yagi Logarithm Antenna

Of the three variants, the Logarithm Yagi Antenna is definitely the most widely used and is already part of the Triband and 5-band repeater kits. In addition, it is the most purchased kit customization because of its features, which make it an excellent compromise.

The Yagi Logarithm Antenna has a frequency range of 790 to 960 MHz and 1710 to 2500 MHz, a gain of 8 dBi, enabling it to capture the signal up to about 4 to 5 km away.

Like its Yagi Super and Double Yagi Super variants, it has an N-Female connector and is obviously waterproof, so it can be placed where it normally performs best: the roof of a building.


3.Yagi Super Logarithm Antenna

In appearance, the Yagi Super Logarithm Antenna is virtually identical to the first one (the flag is 10cm longer) but some important aspects change.

For one, the gain of the Yagi Super antenna is greater (10 dB), which makes it able to go and pick up the signal at even greater distances, up to about 12-14 km. A nice advantage if we are located in rural or mountainous area, undoubtedly.

Second, however, we also point out the side effect of this feature: the aperture angle of this antenna is very small. It must therefore be aimed very precisely and it will not be possible to intercept many radio base stations at once (a weakness that the panel antenna does not have).


4. Double Yagi Super Logarithm Antenna

The double Yagi Super Logarithm Antenna is the latest addition to our outdoor antenna department and is a very interesting product. In appearance it looks like two Yagi antennas placed back-to-back with each other, so it is also double in size.

The Double Yagi Antenna is designed for specific situations, especially narrow environments developed for the long haul. Think tunnels, tunnels, underground parking lots, and warehouses. 

It comes with a 30cm cable and N-female connector.


5.Does my repeater need a yagi antenna?

As we have seen, in our GSM triband Voice+3G and also Call+4G repeater kits and our top of the line 5band repeaters we find the Logarithm Yagi antenna that comes "standard".

Regarding other models, in many cases it is advisable to request a customization of the kit, i.e., replacement of the external panel antenna (standard) with our Yagi, Yagi Super or Double Yagi Logarithm Antenna.

If you have any way of ascertaining that the distance of your building from the nearest radio base station of your operator is more than 1.5km then we strongly recommend that you lean toward a Yagi Logarithm Antenna.

On the other hand, if your distance is more than 4-5km, then it is good to equip your GSM repeater with a Yagi Super Logarithm Antenna.

If, on the other hand, your goal is to bring cellular signal to a narrow, developed environment for the long haul, then the Double Yagi antenna is for you.

All these antennas, at any rate, are compatible with all the frequencies we are interested in.

For the purpose of a flawless installation that gives good results, you may finally need a bracket or rather a support on which to install your new antenna. In any case, we will remain at your disposal for any doubts or special situations to be evaluated together. Very gladly!