LPWAN for a small village – not in Gaul (Latin: Gallia) The year is 2019 Anno Domini, and cellular operators occupy all Hessian and a lot of them have imperfect indoor coverage in the basement of houses. Well, not entirely… One small village of indomitable Hessians plans to change it. However, how can Harald, Martin […]
How do you achieve a redesign from BLE/WiFi to unlicensed LPWAN or NB-IoT? What are the pitfalls you might encounter during the redesign? Why can you not use any old antenna to do the job? What you have to know to pass radio certification in different regions? The unlicensed SubGHz bands in Europe, US, Australia, […]
T-Mobile on NB-IoT was the winner in a thrilling public US LPWAN Champion Hurdle. T-Mobile entered the NB-IoT horse trained by parent company, Deutsche Telekom in Germany. The surprise second place was taken by Verizon, also ridden on an NB-IoT horse. The runners up in the first LPWAN race of 2018 were the unlicensed riders. […]
Unfortunately, it is a regular occurrence that people in marketing departments without technical expertise constantly recycle the same rumours and “news” about NB-IoT. Most of these “professionals” have never been inside a technical university and probably did not pass a basic course in physics at elementary school. These same people probably did not choose the […]
The antenna design in this LoRa-Tag is based on the application note for the Texas Instruments DN038. The customer’s project objective was to match the antenna to the European 868 MHz band without changing the structure. Text excerpt from the TI application note “There are several ways to tune an antenna to achieve better performance. […]
If you are planning to deploy your own LPWA network then you’ll need to understand a few things about RF signal propagation, run a few models and then conduct a few tests in the real world. In this article, we are going to explore what is involved so fasten your seat belts and let’s go… […]
In Patras, Greece, they work on smart city technology development using NB-IoT has started. But how can the developers avoid the need for a SIM card and its subscription? Technical needs The smart lighting controller, for example, has been sending one status update message of 40 bytes every five minutes and a message containing energy consumption […]
RF engineers already know that signal propagation characteristics vary according to frequency. In simple terms, signals carried at lower frequencies travel further. Since wavelength equals the speed of light divided by the period of the carrier signal, we can see that low frequency signals have a long wavelength. Long wavelength, low frequency radio waves are […]
Pigeons don’t tweet, they make cooing noises. They don’t wear backpacks either. Usually. Well, say hello to the new breed of backpack wearing, tweeting pigeons that might just save lives. If you live in a city there’s a good chance you’ll be sharing it most days with a large number of pigeons. And generally […]