Wrong desigend GSM GPS Tracker The two yellow bars on the screen of the vector network analysers mark the – 6 dB return loss target for GSM 900 and GSM 1800. In the lower GSM 900 band the antenna is far away from the -6 dB. The GSM antenna is not an antenna. It is […]
By using of a combined FR4 together with Flex PCB is it possible to bend the PCB and to get a good ground plane for the GSM and GPS antenna. Such PCBs can be useful for tracking of animals, banknotes or tracking of security officers.
2G, 3G and 4G plus GNSS in same shape The new Sierra Wireless HL6528-G is a real amazing piece of wireless technology. I am close to 20 years in GSM and GPS. In the old times we were happy get a GSM module without GPS in a shape of a cigarette box. Such an old […]
Indoor locating of a smart phone by Bluetooth Low Energy (e.g. iPhone or Android phone) Locating of smart phones like an iPhone or Android phone can be done with an app on the device. The app will download the floor plan of the building. Google maps already offers a floor plan generator. Nevertheless such an […]
The sketch about GPS antennas was made during a training 1. GPS chip antenna as PIFA One option are GPS PIFAs. Such PIF antennas are looking for 70 to 80 mm long PCBs. 35 to 40 mm left and 35 to 40 mm right is fine. The shorter the PCB length, the worst the […]
GSM / GPS tracking device on solar power will run endless GSM Module Quad Band GPS module with GPS patch antenna Charging power 750 mW during sunshine at 12:00 A.M. Waterproofed IP65 Embededed GSM antenna MCU Standard SIM and SIM on Chip Battery For more details or an customised GSM/GPS tracker just drop an email […]
Indoor positioning without GPS / GNSS has its benefits. Its helps to get a position, where no GPS / GNSS signal can be received. It also can be used as a backbone for GPS / GNSS. Nevertheless it can be cheaper. Indoor Positioning Alliance In-Location In August 2012 the Indoor Positioning Alliance was founded. It […]
Developers can get up to 3 days trainings on Wireless M2M free of charge. Other companies have to charge Euro 750 per day for such an event. These lessons are for free. The snacks, lunch and the drinks are free as well. Take the chance to listen in day time and to enjoy Berlin at […]
The sketch I made during a three day technical training related to GNSS (GPS, Glonass, Beidou, Galileo, QZSS). The PCB can be even smaller, but this will minimise the efficiency of the antennas. The GPS chip antenna would like to have a ground plane of 22,5 mm left and 22,5 mm right. 22,5 mm x […]
Recently you can navigate with the new version Google Maps 6.0 in the building. Various airports and shopping centres in the U.S. have already been equipped. To navigate without GNSS signals (no GPS and Glonass) you need some radio beacons along the way. A mixture of natural radio beacons, such as GSM base stations and […]