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12 Frequently Asked Questions About Yagi Antennas
6th Jan 2020 /
by Wilson Amplifiers / Comments

12 Frequently Asked Questions About Yagi Antennas

12 Frequently Asked Questions About Yagi Antennas

As you have decided to have a look at this article, it means you’re keen on finding out how to effectively gain signal across all your devices. This article particularly deals with gaining cellular signal, but its lessons can be applied to television antennas, WiFi antennas, and others. A quick overview to answer your concerns about Yagi antennas: they do work to gain signal, as long as they comply with the minimum conditions for reception and transmission of energy such as cell signal, radio, TV and so on.


1. What is a Yagi antenna?


A Yagi antenna is a directional antenna that improves radiation in a single way, and such radiation can be either transmission or reception of energy, such as cell signal.


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2. What is a Yagi antenna used for?


Yagi antennas have different purposes. At an industrial level, they can work for radars to detect movement or for ham radio. At a consumer level, they can be used to enhance Over-The-Air television reception and, nowadays, Yagi antennas can boost WiFi and cell signal at home or at work where remote areas struggle to ensure quality in telecommunications. However, we don’t recommend using them to boost cell signal in your vehicle. We will explain why in a moment.


3. How does a Yagi antenna work?


A Yagi antenna works through the interaction of four essential pieces:

  1. Driven Element: The driven element of a Yagi is the point where the feed line is attached from the transmitter to the Yagi to perform the transfer of power from the transmitter to the antenna.
  2. Director(s): Used to provide the antenna with directional power and gain.
  3. Line: The spine of the antenna used to hold the directors and reflectors and connect to the driven element.
  4. Reflector: Used to reject signal outside its range as well as amplify what’s inside - think of a mirror reflecting light.

These pieces allow Yagi antennas to achieve higher gain than omnidirectional antennas.

They don’t perform well in a vehicle, as driving or sailing creates a constant change of direction. However, the directional nature of a yagi makes it ideal for home and commercial installations, as it allows for greater gain and reach.

How does a Yagi antenna work?


4. How does the range of a Yagi antenna compare to an Omni Antenna?


Yagi antennas and omnidirectional antennas differ when it comes to boosting cell signal at home, at the office, or on the move. Yagi or unidirectional antennas, can catch signal from cell towers within a maximum range of 90°, whereas omnidirectional antennas reach signal to a wider extent (360°). Due to this more focused beam, a yagi antenna also reaches farther than an omni antenna. As a general rule, the more directional antenna, the farther it can go, with extremely directional antennas able to reach nearly 10 miles. Your typical yagi antenna has a radius of 45⁰.

The type of antenna you need depends on your specific circumstances, contact our experts, and they’ll guide you on your search.

5. Is a Yagi antenna directional?


Yes. To be exact, a Yagi antenna is unidirectional, and that’s the main feature when improving cell signal: it aims to maximize the reception of signal from a particular carrier in just one direction.


6. How far can a Yagi antenna reach?


If you’re seeking to amplify cell signal, Yagi antennas come with either 50 or 75 ohm configurations, depending on the use case of your system (commercial or consumer usage). Yagi antennas are three times more powerful than omnidirectional antennas because they are frequency-specific, work with one or two carriers, and can be placed to reach the best possible signal wherever you are.


7. How do I aim a Yagi antenna?


You should aim the outdoor antenna > in the direction that best receives the signal from your carrier> because a Yagi antenna will not receive any signal that is out of the direction they point to. In other words, if your carrier is out of the beam of the antenna, you won’t receive the boost you’re looking for. This is why we recommend finding your nearest cell tower before pointing your yagi antenna.


8. Does a Yagi antenna need to be grounded?


No. One of the main things to consider about a signal booster with a Yagi antenna lies in the installation. It would help if you placed the antenna facing the direction with the best reception, which is often towards the closest cell tower. That means testing different directions until finding out the appropriate one for the amplification of a good signal.

It can be more complicated for antennas with more than one set of directors, because the more directors they have, the harder it is to place the antenna and make sure it’s not going to move after the installation.

Also, in case of a lightning surge, you’ll want to protect your attached booster, TV, router, hotspot, and the like with an in-line lightning surge protector. The antenna may be fried, but at least you can protect your equipment.


9. How do I aim my antenna?


Ideally, you should aim the Yagi antenna at the closest cell tower that supports your network’s provider (remember that Yagi antennas are mostly carrier-specific). There are easy-to-install pole mounting kits, which allow you to point the Yagi antenna toward your nearest cell tower signal reception at your home or office.


10. What does Yagi stand for?


The common name for a directional antenna is “Yagi”. “Yagi” is not an acronym, and it doesn’t have to do with the performance or elements involved in the antenna either. “Yagi” is instead the name of the Japanese scientist, Hidetsugu Yagi, who along with his colleague Shintaro Uda, invented the Yagi antenna back in 1926.


11. What is the front of a Yagi antenna?


front of a Yagi antenna


The front of a Yagi antenna is where the directors are placed. As a result, the reflectors are placed along the the backside of the antenna. For cell phone signal boosters, Yagi antennas are often covered by a plastic casing, and its front is the narrowest part.


12. What are the best Yagi antennas?


The best Yagi antennas on the market are not just those who catch the right spot to receive signal for a few days. The best directional Yagi antennas come equipped with a kit of amplifiers and inside antennas to ensure the correct performance under a long-term warranty. We’ve got you covered for 2 years for any of our cell phone signal boosters with which use a yagi antenna.


The Best Yagi Antenna

  • Wideband outdoor directional antenna
  • Up to +10.6 dB of additional gain
  • Comes in 50 or 75 ohm version depending on system you use it for
  • Captures all forms of cellular signal from all carriers and providers

The Wilson brand of yagi antennas are the most versatile yagi antennas for capturing cellular signal. Reliable and simple to install, people have relied on these antennas for solving their cell problems in-building for years.

The only real consideration is which version to get: 50 or 75 ohm. It boils down to this: if the application you're looking at is for a 75 ohm system, get that version. If it's 50 ohm, get a 50 ohm yagi. Otherwise, you'll need different connectors and adapters to get it all working properly, and that can lead to signal loss.

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Still unsure about the type of antenna you need? Not a problem. Call us at 1-800-568-2723 or email us and we will provide you with a free consultation right away to get all your questions answered.

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