Help me please - RF amplifier with gain 20dB and B.W 10kHz circuit.

Discussion in 'The Projects Forum' started by Eltahawy, Mar 25, 2016.

  1. Eltahawy

    Thread Starter New Member

    Mar 23, 2015
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    1. RF amplifier with gain 20dB and B.W 10kHz circuit pleeeease
     
  2. GopherT

    AAC Fanatic!

    Nov 23, 2012
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    That is not a question. Even if it was, we need more background info - what are you trying to do? What do you have as a starting point (tools, strategy, input signal, desired result, ...)
     
  3. AnalogKid

    Distinguished Member

    Aug 1, 2013
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    A 14 GHz Ku band radar signal amplifier circuit is difficult to design. What power supplies do you have to run the circuit?

    ak
     
  4. Hypatia's Protege

    Distinguished Member

    Mar 1, 2015
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    How ever did you glean all of that from the OP?!:confused:;):)

    Best regards
    HP:)
     
  5. bertus

    Administrator

    Apr 5, 2008
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    Hello,

    There is to less information to give any answer.
    RF can be any frequency from a couple of kHz to many GHz.
    A bandwidth of 10 kHz is very narrow.
    It may be possible upto a few MHz, but impossible when going higher in frequency, as you will not be able to make the Q factor.

    Bertus
     
  6. withoutego

    New Member

    Dec 22, 2015
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    Ka band, that would be more of a challenge.
     
  7. bertus

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  8. withoutego

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    Dec 22, 2015
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    I had to look these up. These designations are
    a mess. The new satellite broadcast band is
    around 21 GHz but they refer to it as Ka. Very
    hard to point a dish at that frequency.

    Ka band 27 to 40 GHz
    W band 75 to 110 GHz

    Q was never used it seems. Letters like that
    are easily confused with zero. Maybe it could
    be used for the Terahertz frequencies opening
    up now. so what is the purpose of this mystery amp?

    and....why is the spell checker using the lower
    case for Heinrick's last name? TeraHertz ? or
    is the uber rule no caps inside a word?
     
  9. withoutego

    New Member

    Dec 22, 2015
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    Now I see the Q band. The first reference I checked
    didn't have it. Seems a mishmash vs the HF meter
    bands hams and broadcasters use.
     
  10. bertus

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  11. withoutego

    New Member

    Dec 22, 2015
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    Very interesting. I will educate myself (a little).
    Shouldn't be surprising that science advances
    even when I'm not looking.

    and thanks too for the professional (adult) way
    you have responded to my ignorance (lack of
    knowledge). Sometimes rare on the web.
     
  12. bertus

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  13. AnalogKid

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    Aug 1, 2013
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    A particular set of skills...
     
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  14. GopherT

    AAC Fanatic!

    Nov 23, 2012
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    I've met someone with those skills before...

    [​IMG]

    [​IMG]
     
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  15. withoutego

    New Member

    Dec 22, 2015
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    Hard to be off topic at this point...but being new here, a question.
    Are the pseudo Engineers discouraged here?, the "Houdini" motor
    posse for example? A very interesting phenom but not Electronics.
     
  16. AnalogKid

    Distinguished Member

    Aug 1, 2013
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    Pseudo, quasi, faux, semi, pre, neo, retro, post-apocalyptic, and, of course, analog...
     
  17. withoutego

    New Member

    Dec 22, 2015
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    An analog of what?
     
  18. GopherT

    AAC Fanatic!

    Nov 23, 2012
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    An analog of digital.

    We are just kicking this thread around the block because there has been no real question so far. Every one is encouraged to participate - posters of bad answers will get slightly blasted if way off base.
     
  19. Eltahawy

    Thread Starter New Member

    Mar 23, 2015
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    Thank you guys for your responses, after all that was a project required by my professor
    so I came here and asked you
    I really appreciate your response
    Again thank you
    And don't think that I am that electronics guy that know everything

    I know that I should educate my self ... Hhhh
     
    Last edited by a moderator: Mar 28, 2016
  20. SLK001

    Well-Known Member

    Nov 29, 2011
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    Did your professor build any background as to the homework assignment? Or did he just throw you into the viper pit? And, given your original question, how would YOU answer it?

    From your requirements, I would say that you are wanting a low noise amplifier for the intermediate frequency stage of a radio. Typical for voice radios.

    An RF amplifier circuit with 20dB gain would have to be split into two separate cascaded RF amps of ~11 dB gain each. 20dB is too much gain for one amp, provided you want your circuit to be stable. Between them, you will need a XTAL filter with a bandwidth of 10kHz (or maybe two 13kHz XTALs), plus the requisite input and output match for the crystal.

    And HOMEWORK questions go into the HOMEWORK section of this forum.
     
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