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saumya_85
Joined: 18 Mar 2009
Posts: 49
Location: INDIA
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 13 Jul 2009 16:20 sim300 atick |
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All most all the mobile phones are not having external antenna. They are doing some work in PCB So it works as Antenna. they don't requier any antenna.
Could anybody help me out how to use SIM300 with out antenna by doing some work in PCB?
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GSM Man
Joined: 15 Apr 2009
Posts: 357
Helped: 46
Location: New Jersey, USA
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13 Jul 2009 18:13 SIM300/SIM305 WITHOUT ANTENNA? |
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| Look at this site for a good explanation - http://www.emtalk.com/tut_1.htm
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Google
AdSense
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13 Jul 2009 18:13 Ads |
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saumya_85
Joined: 18 Mar 2009
Posts: 49
Location: INDIA
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13 Jul 2009 18:31 Re: SIM300/SIM305 WITHOUT ANTENNA? |
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| GSM Man wrote: |
| Look at this site for a good explanation - http://www.emtalk.com/tut_1.htm |
Thanks GSM Man.
Where is your Antenna?
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GSM Man
Joined: 15 Apr 2009
Posts: 357
Helped: 46
Location: New Jersey, USA
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13 Jul 2009 18:57 Re: SIM300/SIM305 WITHOUT ANTENNA? |
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| saumya_85 wrote: |
| Where is your Antenna? |
Cellphones employ patch antennas because they don't "stick out of the phone". However, I make GSM equipment for industrial applications where the radios are often inside structures. To insure that we get a good signal I always use an external antenna. Depending on the applications, sometimes a 'stub' antenna will do, and sometimes we need an omni or a yagi.
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saumya_85
Joined: 18 Mar 2009
Posts: 49
Location: INDIA
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13 Jul 2009 19:26 Re: SIM300/SIM305 WITHOUT ANTENNA? |
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Cellphones employ patch antennas because they don't "stick out of the phone". However, I make GSM equipment for industrial applications where the radios are often inside structures. To insure that we get a good signal I always use an external antenna. Depending on the applications, sometimes a 'stub' antenna will do, and sometimes we need an omni or a yagi.[/quote]
Thanks.. Could you tell me how to design in PCB Layout?
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GSM Man
Joined: 15 Apr 2009
Posts: 357
Helped: 46
Location: New Jersey, USA
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13 Jul 2009 19:37 SIM300/SIM305 WITHOUT ANTENNA? |
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| Search this forum for 'microstrip' or 'patch' anttenna - I'm sure you'll find plenty of posts.
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