GSM amplifier circuit

Discussion in 'The Projects Forum' started by amre, Dec 29, 2015.

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  1. amre

    Thread Starter New Member

    Dec 29, 2015
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    Hello
    i want to design an amplifier to radiate a 950-1800 mhz signal from my source in 150 meter radius or more than that
    i don`t know where to start
    if any one help me with this i`ll be very grateful
    Thank you
     
  2. RRITESH KAKKAR

    Senior Member

    Jun 29, 2010
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    For what application?
     
  3. amre

    Thread Starter New Member

    Dec 29, 2015
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    well it`s for jamming circuit that radiate 30 meter maximum
    i want a separate circuit that feed from the rf section and amplify the signal so that it cover larger area
    Thanks
     
  4. RRITESH KAKKAR

    Senior Member

    Jun 29, 2010
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    Where you want to use it?
    Jamming of whose signal?
     
  5. amre

    Thread Starter New Member

    Dec 29, 2015
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    it`s for studying purpose
    what i`m missing is the gain
    it`s not designed for jamming as it`s designed for securing specific radius
    so 30 meter will be not enough
    the BW 925-970 && 1785-1900 MHZ
    Those are the frequicy range
     
  6. RRITESH KAKKAR

    Senior Member

    Jun 29, 2010
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    Till now what you have done??
     
  7. amre

    Thread Starter New Member

    Dec 29, 2015
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    ok
    the if section is finished which i used 555 timer+ lm386 to lm 741 which is the o/p to the rf section
    signal from if go to rf will pass through 2 vco (925-970 vco) & (1785-1900 vco)
    the o/p of each vco goes to mosfet then the o/p of each mosfet goes to antenna
    or to a separate unit to amplify the signal with it`s own power supply if it`s possible
     
  8. RRITESH KAKKAR

    Senior Member

    Jun 29, 2010
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    You are using 555 timer at what frequency?
    why are you feeding the lm386?
    as same why are you using 741 op amp?
    Which VCO?
     
  9. bertus

    Administrator

    Apr 5, 2008
    15,638
    2,344
    Hello,

    We do NOT allow jamming devices over here:

    Restricted topics. The following topics are regularly raised however are considered "off-topic" at all times and will result in Your thread being closed without question:

    • Any kind of over-unity devices and systems
    • Devices designed to electrocute or shock another person
    • LEDs to mains
    • Phone jammers
    • Rail guns and high-energy projectile devices
    • Transformer-less power supplies
    If You come across a thread or post discussing any of the above topics please report the thread so We can close, and if necessary remove, the offending thread/posts.

    Bertus
     
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