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 simulation? Q: As I previously mentioned, I just bought your book to copy-paste your antenna […]
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 for LTE-M and NB-IoT in DACH A: The question about frequency bands for LTE-M / […]
I get questions about LPWAN designs each week. The question below I will answer 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 years ago now (!), discussing low power wireless and RF topics. Great to see how much […]
First of all, we have to establish whether the mobile emergency call button is to be used locally in a building, on a company campus, or nationwide in a European or a non-European country. In this article, we will first limit the mobile emergency button to use in Germany. The design for Germany can easily […]
Field test: tracking indoor and outdoor In order to demonstrate the tracking of goods and assets across borders, a field test was executed over several days in different countries using different methods of transport. In addition to delivery vehicles and cars, trams and walking were also used. The car was parked in an underground car […]
Enquiry for a smart waste container We have already developed many antennas for metal containers on GSM, UMTS, NB-IoT, LTE-M, LoRaWAN and Sigfox. For us the radio technology does not make a big difference. The akorIoT SensPRO is already a reference design for such a smart bin. Request for the smart waste bin Hi Harald, […]
Which is better: UDP, TCP, MQTT, CoaP or LWM2M? Q: Our application is an asset tracker on NB-IoT, LTE-M, GPRS and GNSS. We need to send the current position of the tracking device to a remote server after a particular interval. I am looking for the LWM2M protocol which consumes less energy & headers added […]
The grey map with the blue triangles shows the cellular base stations in the Kirchheim area. This map is available online from the Federal Network Agency in Germany. In Germany the locations of the cellular base stations are publicly accessible for everybody. The base stations vary in height from about 5 m up to 48 […]
How your wireless IoT idea can become a real product The Timeline: May 2018: Inquiry Tracker with harald.naumann (at) lte-modem.com February 2019: Order for development with akorIoT Group August 2019: Pre-series/ field test order with akorIoT Group Basis = akorIoT SensPRO http://www.gsm-modem.de/M2M/m2m-componets/akoriot-senspro-reference-design-nbiot-ltem/ Radio modules = Quectel BG96 Multimode NB-IoT, LTEM, GSM GNSS Module= Quectel L76L, […]
Another request for a custom PCB antenna for NB-IoT. Since we invested in NB-IoT early on, we can bring a lot of experience. Simply taking over a layout of an antenna for an unlicensed band like LoRaWAN (868 / 915 MHz) usually does not work. It may be sufficient for first tests but if the […]
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