Last week a big package of antennas reached me. Step by step I will make the description of the antennas public. The picture shows an antenna for GSM and UMTS flying over ground plane. Such an antenna will radiate directional. This is perfect if you plan a people or pet tracker close to human or […]
Auf vielfachen Kundenwunsch gibt es am 14. April ein Seminar „Medizintechnik und Funk“ – auch für Nicht-Medizintechniker. Auszug Agenda (Details mit Zeit und Ort im Anhang): Entwicklungsarbeit: Bespiele aus der Medizintechnik, seleon GmbH, Peter Hartung Funkmodule für die Medizintechnik: Update over the Air/Ortung der Geräte ohne GPS und mehr, Quectel Ltd., Edward Huang Kritische Punkte […]
The question as below reach me. I will quote myself. Q: Please let me know the tips , to ensure connectivity all the time. I am loosing connectivity after 2/3 days , I need to manually reconnect by ringing the modem again as on now. A: There are several sources for disconnect. Chapter: AT commands […]
Quad-band GSM / GPRS / Bluetooth module Just have a look on the world smallest Quad-band GSM / GRPS module on LCC packaging. On top a Bluetooth 3.0 module is already included. Even if there are two radios inside, the price of the combined is close to the half of a standard GSM / GPRS […]
Do you have a wireless project? Do you plan a re-design? Do you want to reduce the costs of your IoT / M2M application? Your answer is “yes” to one of these questions – then let us meet at Electronica in Munich – the place to go. You can find me in Hall A4 Booth […]
Selection of ceramic GSM chip antenna I. Size of GSM ceramic chip antenna The size of the ceramic GSM chip antenna is 21 x 7 x 3 mm only. The distance for the selected ceramic chip antenna to the ground plane has to be to be 7 mm. There is a need for a gap […]
GSM chip antenna design mistakes in detail I. Size of the ground plane The length of the distance marked with I is 56 mm only. Most GSM chip IFA antennas or PCB track antennas will radiate perfect on an estimated length of the PCB of 90 to 100 mm. Just compare it with the length […]
Be aware that a GSM module will charge up to 2 Ampere peak current during 2 Watt TX power Take care that your power supply will be able to drive the current peaks. Have a look on short PCB tracks in right width. And have a very close look on a capacitor with low impedance […]
Q: I am trying to figure out if it is possible to design a reasonable quad band on a PCB that has a total overall size (ground plane plus antenna) of about 60x30mm, using a GSM module. Have you ever tried something around this size? A: Some chapters out of my IoT M2M book: 7 […]
The translation to English will follow later Das Ziel des Projektes ist ein multifunktionales Kit zur Entwicklung von M2M IoT Applikationen auf Basis von Linux und Android. Im Prinzip ein Rasberry Pi für Erwachsene mit GSM-, HSPA- oder LTE-Modul. Im Gegensatz zum Rasberry Pi kommen nur Industriebauteile zum Einsatz, welche jeder dann in kleinesten Mengen […]