Home

Designing your first PCB

Main Products

GSM stationary antennaGSM embedded antennaGPS embedded AntennaWiFi/BT/ISM embeddedGSM GPS antennaGSM windows antennaGSM magnetic antennaGSM portable antennaGSM roof antennaGSM PCB antennaGPS antennaWiFi/BT antennaTETRA VHF UHF antennaISM 433-915 antenna

List All Products
Product Search Advanced Search

Resources

Designing your first PCB

_{Designing your first PCB for GSM applications}

On your first PCB you should mount the recommended components for matching circuit. In the later period of the development, you can then optimise the matching circuit. For first trial something close to 50 Ohm is fine. At this point it makes sense to use a GSM tester. A GSM tester simulates a GSM base station. You can select channels beginning, middle and end of the band and force 2 Watt transmit power. Most times the GSM application crashes.

What could happen (examples of mistakes and bugs reported):Power supply or battery is not able to support the 2 Ampere peaks. By the way, this user mistake is independent on embedded antenna. Power down reset is the frequently done user mistake. In our user forum you will find one message board called “Power supply and power down reset”
The 2 Watt RF power interfere with the DC power regulator on your PCB and a triggered power down reset
The 2 Watt RF power interfere with the security electronic in the LIPO battery and generated RF noise on quite other RF bands
The 2 Watt RF power interfere with electronic components in the PCB and generated RF noise on quite other RF bands
The 2 Watt RF power interfere with the micro controller on PCB and the micro controller stops to work

The offices of our customers are very often in cities or villages. In such locations, most times GSM 1800 or GSM 1900 is in use. Both GSM band support 1 Watt only. The maximum peaks will be 1 Ampere.

The base station will be close to you. That means your device has never to support highest power level. By using of a GSM tester, you have full control and can force the worst-case conditions. Premium customers can loan GSM tester from us free of charge.