The good comes again to the end – Worldwide first NB-IoT Xmas Party, Wireless Congress and Electronica

From www.gsm-modem.de 4 months ago in Blogs

In the last quarter of this year, there will be a few more highlights. Electronica Electronica will be in Munich from November 13 to 16. Take a look at Tekmodul at booth C3.148. Once again, there will be a fireworks spectacle of radio news. I have the first German long-term...

Articles from IoT M2M blog

BG95 / BG77 antenna selection and antenna matching

From www.gsm-modem.de 1 month ago in Blogs

In order to save development and approval costs, the antenna, frequency bands, groundplane size and housing should be at the beginning of development. If the company lacks in-house experience with radio, antennas and worldwide approval, we recommend consulting an external...

Data sheet NB-IoT / LTE-M modules Quectel BG77 and BG95

From www.gsm-modem.de 2 months ago in Blogs

In the download links you will find the data sheets for the NB-IoT / LTE-M modules Quectel BG77 and BG95. The rough differences to BG96 have been highlighted in color. The fact that a BF77 requires an area of only...

Simulation of a GSM quad-band antenna

From www.gsm-modem.de 2 months ago in Blogs

The simulation is taken from my IoT / M2M Cookbook. About 30 % of the book is about the integration of antennas into an enclosure. The antenna structure is explained in detail in the book and can be easily reproduced....

Return Loss and VSWR for your antenna

From www.gsm-modem.de 2 months ago in Blogs

If an RF signal is transmitted to an antenna, a part of the signal will be reflected. The return loss in the antenna data sheet indicates how much energy is reflected by the antenna. For mobile radio antennas, for LTE...

Antenna Return Loss by VNA

From www.gsm-modem.de 2 months ago in Blogs

The upper left graph illustrates the measurement of a filter with two ports at the Vector Network Analyser (VNA). Port 1 is feeding the device under test and is measuring the reflection. Port 2 is measuring the received energy. The...

Principle of operation of a VNA

From www.gsm-modem.de 2 months ago in Blogs

To explain the principle of operation of a VNA, I use an optical lens for comparison. Light arriving at the lens is partly reflected. However, a large part of the light is directed through it. The part of the light...

Antenna gain and beam angle

From www.gsm-modem.de 2 months ago in Blogs

Parameters of antennas In addition to the mechanical dimensions and the type of connection, data sheets for antennas specify various electrical and physical parameters. 1. Antenna gain The antenna gain is a relative quantity that refers to a reference antenna....

The 4 Cent antenna for classic Bluetooth, WiFi, ZigBee and more

From www.gsm-modem.de 2 months ago in Blogs

The 4 cent antenna works perfectly. Two coins with a value of 2 Euro Cent at the end of a coaxial cable form a good antenna. We tried the same with coins valued at 1 cent and 5 cents. There...

Quectel BG77 – Time to switch to NB-IoT and LTE-M

From www.gsm-modem.de 2 months ago in Blogs

It’s time to switch to NB-IoT and LTE-M. With the Quectel BG77, anyone can now develop his or her own wristwatch with a cellular radio. With 14 mm x 15 mm a locating device in the matchbox becomes possible. Since...

Design process of your wireless IoT application

From www.gsm-modem.de 2 months ago in Blogs

This is an example of a typical design process with various steps leading to the ready-to-use wireless IoT product. Step 1 – Read the IoT/M2M Cookbook The IoT / M2M Cookbook is intended to help developers of wireless IoT /...