A review of the physical principles behind the Wi-Fi /5G wireless revolution

wi-fiFollowing on from a previous article on DSL and its scientific bases, I now want to review the fundamentals of another technology: radio. As with a DSL, the ability to transmit data in any radio communications system – from the very first Marconi experiments to 5G networks – is bound by Shannon’s equation, based on the channel’s bandwidth and signal-to-noise ratio. In radio, we also have another interesting equation that can tell us the received signal strength when the transmitter power and frequency, antenna characteristics and distance to the receiver are known.

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Ricardo Saiz Villoria: Ricardo Saiz, telecommunications engineer, is part of Teldat’s R&D department. He specializes in hardware, and is responsible for electronic design and equipment certification.

WPA3: Improved Wi-Fi security

WPA3The nature of electromagnetic waves is such that anyone in a wireless network can receive the data sent over the air. With high-gain antennas, it is possible to listen in on the data that passes through an office from outside the building. That is why, right from the outset, a great deal of importance has been attached to wireless network security.

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Pablo Nogueira: Telecommunications Engineer in the R&D department. Within that department he is specialized in Ethenet and WLAN networks.

WPA3, the new safety standard for safer Wi-Fi networks

wpa3Nowadays, all offices, hotels, parks, hospitals and above all private domiciles, have Wi-Fi connectivity for laptops, tablets and smartphones. Likewise, we must consider the new lines of intelligent domestic equipment, also connected and remotely managed via Wi-Fi. There is, however, a question we all ask ourselves: how safe are wireless networks?

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Francisco Navarro: Francisco Navarro, graduated in Physical Science, is a Business Line Manager working within the Marketing Department and responsible for the Teldat Corporate Routers.

Access to guest networks

wifi captive portalNowadays, all companies provide their customers with Wi-Fi in some form or another. We find it in shopping malls, airports, restaurants, offices and even on transport. It is fair to say that Wi-Fi has become a commodity.

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Francisco Navarro: Francisco Navarro, graduated in Physical Science, is a Business Line Manager working within the Marketing Department and responsible for the Teldat Corporate Routers.

Unattended services managed remotely

services managed remotely Nowadays, devices that are operated remotely (i.e., without local staff to verify their working conditions or act in the event of an incident) offer many services to the public.Some examples are: remote ATMs, billboards, ticket vending machines, etc. (more…)

Francisco Navarro: Francisco Navarro, graduated in Physical Science, is a Business Line Manager working within the Marketing Department and responsible for the Teldat Corporate Routers.

Why most 4×4 access points are not worth it

4x4 access When selecting a new Wi-Fi infrastructure, business customers are often faced with a wide range of devices. Customers with an interest in technology will always ask for equipment that meets the latest technical standards. After all, the aim is to invest in the right technology. It seems clear that the current 802.11ac standard has become the benchmark for everything. But what then are Wave 2, 2×2 MIMO, 3×3 MIMO, and 4×4 MIMO, and why is there a new 802.11ad standard. (more…)

Hans-Dieter Wahl: WLAN Business Line Manager
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