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help me identify a IC that can transmit over 2km

Harry
Expert 2920 points
Other Parts Discussed in Thread: CC1120, CC1190

I want to transmit a  packet of data via RF over 2km if it is possible using TI RF chips. please assume a normal living city with buildings etc.

Is there a posibility? 

I tried to find the answer but I was not able to figure a spec that gives a particular range. 

anybody has an idea as to how i could figure this out?

is there any way I could amplify a RF signal? a front end device powerful enough?

  • 0
    TI__Guru**** 317180 points

    Take a look at CC1120. Line of sight range is over 25km and operating on 169MHz is a good option in a city.

  • 0 in reply to TER
    Expert 2920 points

    thank you so much..

    one more question. if I use a module such as CC2520 and then an extender such as CC2590/CC2591  could you roughly  give me a slight idea what the range would be?

    it doest have to be accurate.. I jurst want to have a slight idea

  • 0 in reply to Harry
    Expert 1010 points

    Devices in the 2.4 GHz range are limited to low power operation by the FCC and international regulations.  This is the same range as your home wifi and at best you can achieve a range of  around 100 M. 

    If you violate regulations and use a directional antenna longer ranges can be achieved.  It has been done but it is not legal.  Also since the frequencies used are blocked by water your connection will drop when it rains.

  • 0 in reply to Anthony Ambuehl
    Expert 2920 points

    hey thank you.

    you answered my question the way i expected

    so I am going to use this

    http://www.ti.com/product/cc1190

     it has around .5 W and it is ti's transmitter that transmits highest RF power.

    I will see if this works.

    Other than that, are there any modules I would obtain that would transmit power of around 1W?  

  • 0 in reply to Harry
    Expert 1020 points

    This module might get you close http://blueradios.com/hardware_SC40-1W.htm

  • 0 in reply to berms03
    Expert 2920 points

    yes.. i see.. the higher the power the more costly it is too.. its okay.. I am going to settle down to 1W. I will first try the ti wireless emitter which emits 0.5 watts and check if it is okay for my application. the problem is getting through obstacles . 

    I wonder.. when the frequency increases, does the ability to go through obstacles such as trees increase with it?  my question is if i use 2.6Ghz and 1Ghz both 0.5W transmitters , which one would be more effective? I mean what is the effect of the frequency on the data transmission ability? if you know about this, please share with me. 

    Is it like higher the frequency, the better the quality? 

  • 0 in reply to Harry
    Intellectual 350 points

    You may want to take a look at Radiocrafts' modules. They offer the widest range of radio modules based on TI chip set. www.radiocrafts.com

    Rule of thumb: The lower the frequency, the longer the range.

    Radiocrafts offer modules up to 500mW at 169 / 433 / 868 / 915 MHz and 100mW at 2.45 GHz. You have to choose frequency depening on the local radio regulations where you intend to operate the equipment. At 169 MHz 500mW you can reach up to 60 km!