Passive Wi-Fi : what it is and why it will be key

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Passive Wi-Fi: what it is and why it will be key

Wireless networks are increasingly present in our daily lives. The rise of what is known as Internet of Things devices or IoT makes it necessary to have a Wi-Fi network. This type of device allows many computers to be interconnected and controlled remotely, for example. The problem is that one of the most important drawbacks is the battery. Connecting wirelessly to the router is a significant drain on resources. In this article we will explain what passive Wi-Fi is and how it can help to combat this problem.

What is passive Wi-Fi
As we mentioned, wireless networks consume resources. If we connect our mobile to the router via Wi-Fi it needs power to operate. If we take the example of a laptop connected by Wi-Fi and another identical one connected by cable, in the first case the battery would run out sooner.

This is a major drawback especially for certain devices in the Internet of Things. In many cases they are very small and the battery, if carried, will be very limited. That’s where passive Wi-Fi comes in, which serves to save energy and connect computers to the network.

Basically passive Wi-Fi came about with the idea of reducing energy consumption. This way we can connect our devices wirelessly, but we don’t have to constantly drain the battery.

To explain what passive Wi-Fi is, it is best to compare it to classic Wi-Fi. Normal Wi-Fi as we know it in our day-to-day lives is connecting two devices wirelessly. Both devices send and receive signals, so there must be enough power in both cases.

However, passive Wi-Fi does not work the same way. In this case it is only necessary for one device to send signals, as the other has passive sensors. This is achieved by being able to separate the waves. In traditional Wi-Fi, two types of waves are sent: a digital one, which transmits the data, and an analog one, which transports the data.

How passive Wi-Fi works
The device we’re going to use to connect is going to have a chip in it. The transmitter, which can be a router for example, will have special software capable of connecting to that sensor.

Logically, this will also have limitations. The first thing is that the maximum distance at which it usually works is about 30 meters. There will also be limitations in terms of speed compared to traditional Wi-Fi. Also, there are not many devices that are compatible with this technology at the moment.

The main advantage is that it saves a lot of energy. We will be able to connect devices longer without worrying about the battery. Also the ease of use and implementation once this technology is extended.

There are more and more devices connected
It is a reality that we live in an era where we have more and more devices connected to the Internet. IoT devices are going to increase considerably in the next few years. Their number is expected to multiply in our homes and new ones will appear as well.

We are no longer talking about just having a computer or mobile phone connected, but there are many other devices. We are talking for example about televisions, light bulbs, video players, etc. There are many types of devices that we have connected to the network and that are part of our daily lives.

All this makes it necessary to have a proper Wi-Fi network. It is vital to always maintain security, as well as to have a correct configuration that makes the most of the available resources we have.

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