Test report made with MiniVNA – cellular antenna I

From www.gsm-modem.de 7 years ago in Blogs

The upper graph shows some interesting details. XXI and XXII are faults generated by the VNA. The peak close to 1100 MHz and 1500 MHz cannot be true. However, the peaks marked with XXI and XXII will... My blog was started in 2009 as a free of charge information service....

Articles from IoT M2M blog

Quectel BG770 – NB-IoT, LTE-M, GNSS module

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

Quectel BG770 – NB-IoT, LTE-M, GNSS module The Quectel BG770 is based on the Altair Semiconductor ALT1250. The eDRX (extended Discontinuous Reception)/PSM (Power Saving Mode) ensures low power consumption. With a super-low current consumption of approximately 3 uA in PSM...

PCB-F-antenna for NB-IoT, LTE-M and GSM

From www.gsm-modem.de 5 months ago in Blogs

Q: Thanks for all the materials you shared. I am reading the cookbook but I can only find some guidelines so build a GSM IFA antenna. A: Can you please share with me the exact dimensions you used in your...

In which frequency bands will LTE-M and NB-IoT operate in DACH?

From www.gsm-modem.de 5 months ago in Blogs

Q: I have a question before I start my development. I seem to remember that you mentioned in an email that we need more bands for LTE-M. Are frequency band 8 and 20 not enough? The answer about frequency bands...

NB-IoT / LTEM / LoRaWAN design question – CoAP, MQTT, MQTT-SN?

From www.gsm-modem.de 7 months ago in Blogs

I get questions about LPWAN designs each week. The question as below I will anser online, because it is a generic question. NB-IoT / LTEM / LoRaWAN design question: Hi Harald, We’ve been in contact a few times a few...

Which LPWAN do you use for an emergency call button?

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

First of all, we have to differ whether the mobile emergency call button is to be used locally in a building or on a company campus or nationwide in a European or a non-European country. In this article, we will...

A short digital Christmas novel

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

As Santa Claus will soon bring the presents, I will explain the energy and cost savings with SubGHz Mesh-Net at a real, Christmassy challenge. Santa’s sledge moves around the world. His reindeer are changed several times during the Christmas night....

GSM / NB-IoT antenna and radio certification

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

Questions about radio certification will be answered in our LPWAN and BLE seminars. About 1/3 of the time we explain how to certify wireless IoT devices. The wireless part is only a small part which has to be tested according...

Tracking indoor and outdoor by GNSS and cell ID

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

Field test: tracking indoor and outdoor In order to demonstrate the tracking goods and assets across borders, a field test was executed over several days in different countries and different methods of transport. In addition to delivery vehicles and cars,...

GNSS Antennas and Recycling

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

Everybody talks about protecting the the environment and recycling. The nail antenna comes like 0G from the land of poets and thinkers (Germany). We hit the nail on the head. We don’t just say nail – no we use old,...

Request for an IoT M2M Cookbook

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

From time to time developers ask questions about the content of the IoT M2M Cookbook. This time the question reaches up to 5G and I explain why I’m not currently writing to 5G. Question about the IoT M2M Cookbook Hello...