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4G LTE Antenna – What Do I Need to Consider? 

If you are using a 4G LTE broadband connection, or plan to, then you’ll need to be considering your external antenna. 

 

4G broadband is a fantastic option if you struggle with a standard broadband connection, especially if you live or work in a more rural area. Over the past few years we’ve seen a big uptake in 4G and mobile broadband options – For homeowners as well as businesses. 

 

What you don’t want is to switch to mobile broadband, and then end up with download speeds that are lower that what you were expecting. Whilst this may simply be down to poor reception, there are some other factors that can come into play. 

 

So, with you as the user, what considerations do you need to make to ensure your 4G mobile broadband connection will be the strongest it can be?

 

Did you know that LTE is MiMo technology?

LTE, like 11n Wi-Fi, is a multi-stream radio, multiple in/multiple out (MiMo) service. So similarly to 11n Wi-Fi, LTE uses multiple radio data streams to and from the end client – Which means the more streams of data the client can take, the faster the broadband. 

Just like in 11n Wi-Fi, the number of streams is T (the number of transmit radio streams) multiplied by R (the number of receive streams the connection can support) so TxR. This means that if something supports 2×2 streams, it can support twice the upload and download speed of a device with 1×1. In 4G LTE, you get anything from 1×1 to 8×8 stream capability (including all the possible mixes in between them). 

The number of transmit and receive streams dictates how many antennas the client needs. So for a 1×1 service, you would only need a single antenna. For a 2×2 service you would need 2 antenna. You get the idea. 

A connection can only support the number of streams the service provider is capable of via their masts. It is also dependent on the client device and its radio capabilities. 

The majority of devices – Like phones and routers – have dual stream capabilities. 

 

Choices of Antenna

If you’ve already been looking for a 4G LTE antenna then you’ll likely already have realised that there can be a difference in price. One of the main differences between antennas will be, as we said above, the number of connections they have. 

 

As you’ll have probably guessed, the more connections they have, the picier the get. So a 2×2 (or 2×1 or 2×2) device will cost more than a 1×1 device. You’ll typically see a choice between single (1×1) and dual connection (2×2) antennas. 

 

In most scenarios, you will be wanting a dual connection (2×2) antenna so that it supports the functionality of your router and other devices with dual stream, MiMo functionality.

 

But how do you know if the antenna will be any good? 

 

That comes down to polarisation. There needs to be a physical difference between the radio streams so that the receiver can differentiate between them. This can be as simple as mounting the antennas, leaving a physical gap between them of a few inches. 

 

It’s also a good idea to have each antenna at a different angle – Ideally at 90 degrees to each other. This is because although the radio waves might leave the mast in a lovely vertically polarised fashion, after a few reflections they will likely not be like that any more. Setting up the antenna so that they can also receive radio waves that are no longer vertically polarised will mean you will better receive the signal – A cross shape would achieve this. 

 

Do I need a Directional or Omni-Directional Antenna Set Up? 

Whilst it might be tempting to just opt for the highest gain directional antenna, this isn’t actually always the best choice – For 4G LTE or Wi-Fi. 

 

If you imagine a radio wave travelling from the mast to your receiver, with nothing in the way, it would have a straightforward route and an uninterrupted signal. In real life, this is unfortunately not the case. The signal cannot go through anything solid, so whenever something gets in its way, it reflects and scatters from those objects until it reaches the antenna. This means that the radio signal could come to your receiver from all different directions. 

 

Directional antenna, although high gain, have limited coverage in terms of their angle. So with radio waves potentially coming in in all directions, the directional antenna is going to cause you problems. 

 

The best situation for a directional antenna is when there is a clear line of sight between the mast and the mount of the antenna – Which is not a very common thing. 

 

The omni-directional antenna might well be lower gain, but it should pick up the signal regardless of what directional the radio waves are coming from. 

 

The best way to improve the signal you receive is to mount the antenna outside and as high up as possible.

 

Directional Antenna Pros

  • Can occasionally give a better, stronger and cleaner signal when carefully aligned with line of sight 
  • With a clear line of sight (and no ambiguity) then a directional antenna would be preferred choice

Directional Antenna Cons

  • Careful alignment with line of sight can be very tricky
  • Without line of sight, you have to rely on how it reflects and scatters
  • Changes in environment can result in how the signal is reflected (e.g. something as simple as a dry wall reflects better than a wet wall)
  • It is harder for the system to switch to a different mast (this could be dictated by the provider)

 

Omni-Directional Antenna Pros

  • Easy and quick installation (no tricky, careful alignment needed)
  • It is easy for the system to change transmitter masts
  • Antenna can be mounted outdoors, making a significant improvement in signal despite the lower fain

 

Omni-Directional Antenna Cons

  • In comparison to the directional antenna, the omni has lower gain
  • Can be more susceptible to radio frequency interference coming from different directions

 

Frequency Bands

There are a number of frequency bands that are used for 4G LTE in the UK. There’s the 800MHz band, the 1400MHz / 1.4GHz band, the 1800MHz / 1.8GHz band, the 2100MHz / 2.6GHz band, the 2300MHz / 2.3GHz band, and the 2600MHz / 2.6GHz band.

 

Although not set in stone, you generally find that the lower frequency bands are used more in rural areas due to them having longer transmission range than the higher frequencies and having to cover a larger geographical area. The higher band would likely be used more in built up towns and cities. 

 

What does this mean for antenna? Well, it means that you, as the end user, need to ensure that your antenna will support the service and frequency band of your provider. If you are sensible and savvy, you will choose an antenna that can cover the different frequency bands in case your service/provider changes. 

 

Stream Bandwidth

The available spectrum is divided and allocated between providers into sub-bands. The connection you get as the end client will depend (and vary) on how many clients the local signal mast can support as well as the bandwidth. 

 

If you live or work in a high user area, the density will mean that you may struggle with throughput speed or even getting a connection in the first place! 

 

What high user density situations could impact your 4G connection? Well, if you live near a football stadium or a busy motorway, you may find that on match day or during a bad traffic jam, your internet connection comes to a standstill as well! 

 

Which Antenna Do I Need for my 4G LTE Connection? 

 

How do you choose? Let’s take a look again at the main considerations you need to think about to ensure the best possible connection. 

 

Single or Dual Antenna

 

Does your router only have a single antenna connector? If so, then you should probably choose an external antenna with a single connector. 

 

If your router has a dual stream connection then you need to choose an antenna with 2 connectors. You could also choose two single connection antennas. 

 

Remember – If the local signal mast sends out a 1×1 service, then that’s all you’re going to get, even if you have a router and antenna set up that supports 2×2. Having the 2×2 compatible service won’t see you any difference if it’s a 1×1 signal service.  

 

Directional or Omni-Directional Antenna? 

We’re not trying to tell you what to do… But our Wi-Fi expert’s advice would be, in most scenarios, to go for an omni-directional antenna. As we mentioned above, it’s tempted to just go straight for the antenna with the biggest gain, usually the directional, when you could face very tricky alignment issues. Very few properties, business or home, have a clear line of sight between their local mast and their antenna. Unless you have this clear line of sight, then an omni is the best option.  

Correct frequency

Remember to ensure that your choice of antenna will work with the frequency range coming from your service provider and local mast. It’s only going to work if your frequency band matches what your antenna supports! 

 

To avoid potential issues when services or providers change, you should aim to choose an antenna that covers all the 4G LTE bands here in the UK. That means that your antenna should always work, even if you change provider or your local service changes. You might have to pay a little more, but it could save you problems in the future. 

 

Location

You should always mount the antenna wherever it has the best line of sight to the local mast. Sometimes you might not be able to see the signal mast, especially if you live or work in a very built up area. Even if you cannot see the mast, bear in mind the direction it’s in – Does your antenna need to be at the front or the back of your building? Even without a clear line of sight, this will vastly improve the signal you get. 

 

Generally speaking, the higher up you can mount the antenna the better! 

 

Also make sure that you’re not locating it close to a thick wall or anything metal. Even an omni-directional antenna would struggle to get a good signal in these situations! You want to make it as easy as possible for the signal to reach the receiver on your antenna. 

 

I’ve followed the advice but still don’t have good download speeds? 

You could have the perfect signal – And still not get good download speeds. This could be down to a few different reasons:

  • The service capabilities of your provider (the frequency they are allocated)
  • The service provided from the local mast
  • The capabilities of your router
  • If you live or work in a high user density area with lots of people trying to connect at the same time

 

Whether or not this matters depends on what you are using your connection for. If you are a business and are relying on your 4G LTE connection for your business operations, then this is going to be an issue. 

 

Trust the Experts

 

Here at Geekabit, our Wi-Fi experts can tell you just how reliable a 4G (or 5G) mobile broadband connection would be with one of our surveys. 

 

If you’re struggling with wired broadband, and not getting the reliable internet connection you need in your rural business or home, then 4G / 5G could be a fantastic option for you.

 

It can feel like a big jump to give up on your wired broadband connection and opt for 4G – Which is where our Cell Coverage 4G survey comes in.

 

We can tell you exactly whether 4G broadband would work for you, and which network would be most reliable.

 

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How Do Wireless Directional Antennas Work?

This week we’re going to take a look at wireless directional antennas and how they work. By understanding this, you can ensure that your Wi-Fi network provides the coverage you need for reliable, strong Wi-Fi links.

To create a wireless bridge or point-to-point link, you would use a directional antenna. Your coverage requirements will determine the size and shape of the directional antenna needed, as well as whether you are using them inside or outdoors.

First things first – What do we need in order to establish a long-range wi-Fi link? There are a few main requirements that we need in order to achieve this.

Remote Wi-Fi Links – 3 Requirements

We need to satisfy 3 requirements in order to set up a long-range Wi-Fi link. Whether your signal is indoors or outdoors, the basic needs remain the same. For example, the signal could likely navigate and pass through a thin wall indoors, or one tree outdoors. However, navigating an entire building of walls or a forest of trees would be more difficult.

When a wireless signal is traversing over longer distances, packets of data can be lost. Adding in other complexities (like many walls or trees) can cause problems with the signal.

So in order to establish and maintain a strong connection over a long distance we need to fulfil these 3 requirements:

  1. There must be a direct line of sight between the antenna and the receiver. This means no obstacles in the way, like buildings, walls or forests.
  2. The antenna must be elevated and be horizontal with the point that is receiving the signal ready to transmit it. For the connection to be strong, the antenna and the router for example, need to be on a level – Not one higher or lower than the other.
  3. The antenna must be directed towards the router or Wi-Fi transmitter. The directional antennas only emit and receive Wi-Fi signal in one single direction, so it needs to be positioned on that side. The accuracy needed for the position depends on the angle opening on the antenna. For example, the smaller the angle, the more accurate the position must be. More on that next!

Antenna Angles

How far a directional antenna can transmit a Wi-Fi signal depends partly on the size of its angle. For example, a directional antenna with a wide angle could transmit to a wider area around it, but not as long a range. A directional antenna with a small angle is a more focused transmission and will provide further coverage.

A good analogy to explain this is a light bulb. A bulb without a lampshade will emit light at an angle of 360 degrees. It works well to illuminate the area in close proximity, but doesn’t have great range in terms of distance. For example, lighting up one room.

In comparison, a bulb inside a torch operates at an angle of approximately 30 degrees. The light is much more directed, and thus has a further coverage range – But we don’t see light outside of the ‘sides’. The smaller the angle, the further the reach.

The same premise applies to wireless signal and directional antennas, as you can see from the diagram below.

Types of Wireless Directional Antenna and Their Uses

There are 4 main models of directional Wi-Fi antennas. They are designed to provide a Wi-Fi connection over long distances. They direct an entire frequency pattern in one direction to reach from point-to-point. A directional antenna receives the Wi-Fi signal and emits it forward; the distance it can cover depends on the angle it uses.

  1. Wireless Directional Antenna for Indoor Use – The 60° angle antenna

    A wireless directional antenna with an opening angle of 60 degrees is most practical for indoor use. The open angle of this directional antenna enables it to see all the Wi-Fi networks in it’s environment. It provides good quality signal over a range of up to approximately 300m.

  2. Wireless Directional Antenna for Long-Range outdoor Use – the 35° angle antenna

    This wireless directional antenna uses an opening angle of 35° which enables it to locate all the AP’s in a mesh Wi-Fi network outside the premises, covering a distance of up to around 800m. For this reason, it’s commonly used for long range networks. They are generally easy to install, are a manageable size and tend to come weatherproof so they can be used outdoors come rain or shine!

  3. Wireless Directional Antenna for Distant Networks – the 30° angle antenna

    These wireless directional antenna models have a closed angle. Their installation is a little more complex to the previous two models, and therefore is better suited to professional networks that need to cover very distant networks. Due to the closed angle, it is extremely important to get the positioning accurate.
  4. Wireless Directional Antenna for Professional Installers – the 7° angle antenna

    Due to these models of wireless directional antennas having a very narrow beam, it’s necessary to have them professionally installed. They are a favourite among professional Wi-Fi installers as they have a very high gain so provide a high wireless broadband casting range. High gain antenna can provide a strong Wi-Fi connection in all parts of your property from a single router. This type of directional antenna will have a parabolic reflector – basically a curved surface like a dish which direct the radio waves. This type of wireless directional antenna is ideal for long range networks.

If all this talk about wireless antennas has got you confused about which direction to go in, then why not give our Wi-Fi experts a call?

Working out of Hampshire, London and Cardiff, we can plan, design and install a Wi-Fi network that’s tailored to your home or business requirements. Get in touch with us today and we’ll have you better connected in no time.

 

 

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Dreaded Dead Spots

We’ve all been there.

 

You’ve set out to do some work in a coffee shop and after ordering your coffee and finding the perfect corner to settle down in you realise the Wi-Fi doesn’t work there.  ‘Typical’ you think as you pace around with your device in hand trying to find a connection.

 

This week we’re trying to discover what it means to have a Wi-Fi dead spot and how to avoid these cursed spaces.  

 

There can be so many reasons for these dead spots but the main ones are building interferences ie – thick walls or awkwardly placed Wi-Fi access points that can’t reach certain areas.  With that in mind, it can be quite easy to fix these mysterious dead spots which makes it all the more frustrating when you come across one.

 

If you find a dead spot in your home or business space the first thing you can do to try and close up these dead spots is to re-position your access point.  Often central locations suit access points best, where they can get away from thick walls or fire exits which can all interfere with signal.   

 

That brings us to our second suggestion – removing obstructions and ensuring that your access point is free of any interference.  Often clients don’t realise how easy it can be to eliminate these obstructions from the area.  If you identify anything near the access point that you think could be causing problems then remove it and see if the dead spot remains – in most cases dead spots require a trial and error approach. Other electronic devices and thick metals can be a source of interference that often go overlooked but it’s worth getting to the bottom of the issue and ensuring that you try removing as many obstructions as possible to see if that affects the dead spot.
If you need more advice on how to avoid these frustrating dead spots then don’t hesitate to get in touch.  It’s always helpful to get an expert opinion if the problem persists.

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Wi-Fight against external antennas?

Internal antennas are used for ordinary access points and the chances are you are no stranger to those.  However, most people haven’t considered external antennas for fear that they will be too costly and time-consuming to set up.  Often people are unaware of the benefits of external antennas so this week we’ve been looking at the advantages and disadvantages of external antennas and have found some interesting info.  External antennas are great for use outdoors and can have a huge impact on the overall network performance by increasing directional accuracy.

Firstly, let’s brush up on what types of external antennas are out there.  Omni-directional antennas are useful for outdoor spaces that are large in size and cater to big numbers.  However, semi-directional antennas do exactly what you would imagine.  They direct the network to different areas and range in degrees which mean they can cover a specific area.  The downside of semi-directional antennas is that they are not so great for large areas since they are highly focused and often come out of something like a dish.  They have a very small range but can be powerful.

An Azimith antenna pattern is what you can expect to use with an external antenna.  Understanding this alongside knowing how the WiFi signal moves around the space you are working with and being able to mentally visualise it will hugely help in the deployment of the outdoor antenna.  It is essential to mount the antennas properly and take the time to get the right angle.  It’s also crucial to consider the spacing between antennas to avoid connecting two antennas to one access point.  The exception to this rule is if you are using a DART connector which can handle it but for the average external antenna avoid this at all costs.

Wi-fight against external antennas? Hopefully this blog post has given you a bit of insight into external antennas so you can learn to love them like we do!

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