IoT M2M blog

The home of free hints and tips about wireless IoT / M2M

Wow, 3.2 dBi  gain and 79 % antenna efficiency – a mega-great antenna, or is it?

Wifi BLE Bluetooth PCB antenna with cable

Do you use antennas in your products? Do you compare data sheets? Do you have problems comparing? Are the antennas in your device not compliant with the data sheet? Are there problems with radio certification? Then I will be glad to help you, starting with the analysis of the data sheets all the way up […]

Why to use NB-IoT instead of LoRaWAN or Sigfox?

Why NB-IoT instead or LoRaWAN and Sigfox

Why now NB-IoT instead of LoRaWAN or Sigfox? There are hundreds of reasons for NB-IoT and hundreds against LoRaWAN and Sigfox. Below is a typical example. The potential customer already prefers NB-IoT and we can deliver NB-IoT with fallback to GSM. In Germany there is no Sigfox Indoor in my city. In the three neighbouring […]

IoT M2M Cookbook – The outlook for embedded antenna design

GSM PCB antenna simulation

The IoT M2M Cookbook contains a simulation of a dual F antenna for cellular. This antenna has been customized several times by customers, or by us on behalf of customers. The Gillette order button using this base design and described in the book supports NB-IoT, LTE-M and GSM from about 750 MHz with 960 MHz […]

NB-IoT and Sigfox comparison – number of operators in Germany and the States

Cellular operators versus Sigfox in US

In order to minimize the risk, the developers of IoT devices try to avoid single source components and services. For microcontrollers and radio modules it becomes difficult, but mostly similar components from different manufacturers are used. The LPWAN technology has to be chosen sooner or later. NB-IoT and LTE-M are offered by different network operators […]

LPWAN gateway on a farm in Australia – diffraction of radio wave

LPWAN with diffraction in detail

When a rectilinear radio wave hits an edge, it changes its course. This effect is called diffraction. By diffraction, we understand a bending effect during the propagation of electromagnetic and acoustic waves. The diffraction causes a change from the straight-line propagation of the waves and occurs at obstructions, mountains or buildings. A simple, free simulation […]

LPWAN gateway in the middle of the North Sea – Fresnel zone

LPWAN Helgoland radio link on 169 m and 1 m mast

Low frequencies in the 900 MHz range are a blessing and a curse for LPWAN. The low frequencies spread further in the open field and penetrate the walls of buildings better. But the curse of the low frequencies is the much wider Fresnel zone. To ensure undisturbed transmission, the space between the transmitter and receiver […]

Harald Naumann © 2014 Frontier Theme