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What is an Omnidirectional Antenna

Updated On September 30, 2020

One of the most widely used devices in these times is omnidirectional antennas. However, many people still do not understand the specific operation of this device. This is why we have developed the necessary information to go through its functionality.

It is necessary to consider that an omnidirectional antenna can be really useful for many people. It is an antenna that is widely used in large cities. Here you will notice that you can take advantage of all kinds of signals with this type of antenna. So, let's look at what exactly a directional antenna is and how it works. 

Omnidirectional Antenna

Nowadays an omnidirectional antenna can be very useful. In principle, it is a good option to be able to increase the signal needed by a certain cell phone. Additionally, here it is important to consider that there are both directional and omnidirectional antennas. 

In particular, a directional antenna is designed to pick up only one type of signal, i.e. in one direction only. In contrast, an omnidirectional antenna can pick up a large number of signals from all directions. Thus, when it comes to receiving or sending signals in all directions, it is necessary to understand how it works.

Here the directions are sent and received horizontally. In turn, it is necessary to know when to use these types of antennas specifically. In this way, it will be much easier to obtain the most appropriate functionality for your needs. Also, there are some advantages here that are superior to other options, such as directional antennas.
What is an Omnidirectional Antenna?

How do they work?

First, you need to consider that signals are sent and received horizontally in all directions. So, the coverage area is always drawn or displayed as a donut or circle. So, in the middle of this circle is the omnidirectional antenna. At the same time, it is necessary to consider that the signal strength is lower concerning a directional antenna.

In principle, this simply happens because the signal is being sent in all directions, rather than just one direction. In contrast, the advantage here is that it is very simple to cover a much larger area with an omnidirectional antenna.

Besides, a high level of accuracy is not required to be able to locate the antenna. With a directional antenna, precise positioning is necessary to obtain a good result.

On the other hand, it is necessary to know that the concept of gain describes the range and shape of an antenna's signal. In principle, the signal has a flatter shape when the gain is higher. In turn, a much wider coverage area can be obtained.

It is also necessary to consider that a very strong signal can be received from the cell provider's towers used by a given person. That is why the advantages here can be highly beneficial when you know what you want to get.

How to efficiently use an Omnidirectional Antenna?

As mentioned, you need an omnidirectional antenna to be able to receive a lot of different signals. Here, since you are trying to receive a lot of signals, the intensity must be high. At the same time, the signals should not be emitted from far away. This simply weakens the intensity as well as the user experience.

Also, an omnidirectional antenna can work perfectly with an amplifier for better results. In this way, the antenna receives several signals and then supplies them to the amplifier. So this allows for increasing the signal strength in a vehicle or a building.

In case you need to use a signal that is too weak it is recommended to use the stronger antenna. This way, you will be making sure that the amplifier gets a strong enough signal to do its job. Therefore, it is one of the most used antennas in big cities with many buildings. 


1. Do Omnidirectional Antennas work?

One of the best devices for picking up signals in all directions is an omnidirectional antenna. Here the user can receive signals in all directions horizontally. For this purpose, it is advisable to live in a geographical location with many signals nearby. In this way, the user experience can be optimized from the start.

The effective range is much shorter about a directional antenna. However, the consequences are much less when a certain signal fails or becomes congested.

In this case, an omnidirectional antenna can use another signal instead. In combination, both installation and configuration are usually very simple. Therefore, not too many resources are required for this.

2. Are amplified antennas worth it?

In some situations, an antenna amplifier can be effective. However, it is necessary to know exactly where to use them to take advantage of them. As soon as a signal provides a good level of intensity, it is not necessary to use an antenna amplifier. If you use an antenna amplifier then the results will not be much better.

If you decide to use an antenna amplifier as well, you will notice that the reception overload, distortion, and noise increase considerably. A good way to try this is to pick up a signal with the amplifier turned off. If the result is not good, then you can use the antenna amplifier. (1)

Usually, this type of device provides good results when the person is in an area of large buildings. There are multiple obstructions that the amplifier can avoid and provide a good signal.

3. Is a higher antenna gain better?

Here it is necessary to consider that a gain level is higher when the number of dBi of an antenna is also higher. Thus, this value could also be lower relative to a wide field pattern. When this happens then the signal can go in a very narrow direction but at a greater distance. This is why it is necessary to know exactly what type of antenna you need. (2)

In general, people who live in remote areas do not expect to receive many signals around them. So, in these cases, it is advisable to have a directional antenna, as the advantages are greater. Even these types of antennas are much more effective with weak signals.

Additionally, people living in a city often have a large number of signals. So here it is much better to opt for an omnidirectional antenna. This will give the signals a stronger intensity and the number of signals will be higher than in remote areas.

4. Is the Yagi antenna omnidirectional?

According to the experts' opinion, this type of antenna is one of the most powerful ones in existence today. On the one hand, it is a device that is very simple and quick to install. On the other hand, the configuration presents a higher level of difficulty compared to an omnidirectional antenna. However, it is one of the best options available today.

5. Can I use an old satellite dish as an antenna?

You can use this type of satellite dish as an external television antenna. So, depending on the signals in your area, you may be able to receive digital TV broadcast signals. Of course, this requires a certain configuration.

Wrapping Up

Without a doubt, an omnidirectional antenna can provide a host of advantages. It is one of the devices highly recommended for densely populated urban areas. Here it is possible to find a large number of signals of different strengths. Therefore, the user experience can be optimized with an omnidirectional antenna. 

You may also check our guide for the best omnidirectional outdoor tv antenna. You can also visit our learning page to check articles like why an omnidirectional tv antenna is better than a normal one

We hope this guide helps you choose which antenna would you prefer.
(1) amplifier -
(2) dBi -

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About the author 

John Temple

Joseph is an electrician with 10 years of experience he moonlights as a writer and works for Serif TV on some key articles.

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