Electronic – SIM900 antenna design

sim900

I'm designing a hardware for a hobby purpose involving SIM900. I'm a newbie when it comes to antenna design. I was wondering what would be the best antenna choice to start with. Even though chip antennas do have some design complexities involves, I'm bend on using them since they're kind of compact. My question is whether chip antennas will be able to radiate enough power to transmit to cellular base stations. I haven't seen any SIM900 modules with chip antennas.

http://simcom.ee/modules/gsm-gprs/sim900/

Thanks.

Best Answer

I would take a look at the Taoglas PA.22a chip antenna or the Pulse W3073.

They tend to be a little pricey on low quantities, but they are purpose built quad-band (850/900/1800/1900 MHz) antennas that should work with the SIM900 if appropriately designed.

A well matched and well designed chip antenna will certainly radiate enough power based on the max-power output of the SIM900 (1W-2W).

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Electronic – arduino – sim900 escape character error

I found one way by which escape character can be sent... You do this by specifying the length to AT+CIPSEND command. So the commands exits only after you have sent all data specified by the length...

AT+CIPSEND=12

By doing it this way... the escape character can be sent..

SIM900 and Phone Numbers

You don't write a phone number to the SIM900.

Your cellular service provider writes the phone number, along with other account information, to a SIM card. You connect the SIM card to the device.

You will need a separate phone number for the SIM900 - unless you want to pull the sim card out of your phone every time you want to use it.

Even if you could program a new SIM card to have exactly the same information as the one in your phone, your provider would detect that and be very unhappy with you.

Best Answer

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SIM900 and Phone Numbers

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