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GSM and Concern on PTCRB

_{GSM applications and Concerns on PTCRB}

If you plan to retail your product in the United States, you need - in worst case - a budget of USD 25.000 for a customized antenna design. You also will need a budget of USD 50.000 for the PTCRB approval. Cingular, the biggest GSM operator in the States asks for an approval for any product based on an approved GSM module again. They will ask for an efficiency of the antenna of at least 50 % on the whole GSM band.

Integrated devices must complete PTCRB testing by an approved test laboratory. The exact amount of testing and cost is determined by an approved PTCRB test laboratory.
Typical testing can include the following areas:

Audio interface
Power interface
SIM interface
RF interface
MMI interface
Other testing including TRP/TIS Radiated Performance

PTCRB testing of an integrated device with a quad band module typically costs between $30,000 - $60,000 USD. Contact approved PTCRB test labs for exact testing prices for your integrated device.
In order to start PTCRB testing you will need to open a project with CTIA (http://cpo.ctia.org). The cost to open a project for an integrated device is $3,250 USD.

Full details of the PTCRB process for integrated devices are described in the NAPRD0 document. It is recommended to use the same test house for both FCC and PTCRB testing. This can save money since this will ensure certain testing is not completed twice.

ENVIRONMENTAL CONSIDERATIONS
Close proximity to components or housing affects the electrical performance of all antennas. When placed on a non-conductive area of the board, ideally there should be clearance of 4mm in all directions from the
board/housing for maximum efficiency. A reduction in the efficiency of the antenna efficiency or a slight shift in tuned frequency will be observed if these clearances are not adhered to. Proximity effects will also have an
adverse effect on the radiation pattern of the antenna.