+ Post New Thread
Results 1 to 13 of 13
  1. #1
    Full Member level 1
    Points: 1,109, Level: 7

    Join Date
    Mar 2017
    Posts
    108
    Helped
    0 / 0
    Points
    1,109
    Level
    7

    Two tone nonlinear simulation in ADS

    In two-tone nonlinear simulation. How much should be Fspacing? And also is it RF frequency should be the centre frequency?

    Note: my target frequency band 3.4-3.6 GHz. thanks

  2. #2
    Super Moderator
    Points: 83,981, Level: 70
    Achievements:
    7 years registered
    Awards:
    Most Frequent Poster 3rd Helpful Member

    Join Date
    Apr 2014
    Posts
    17,075
    Helped
    3858 / 3858
    Points
    83,981
    Level
    70

    Re: Two tone nonlinear simulation in ADS

    Hi,

    I'm no HF specialist, but afaik Fspacing depends on the input (data) frequency.

    Klaus
    Please don´t contact me via PM, because there is no time to respond to them. No friend requests. Thank you.



    •   AltAdvertisement

        
       

  3. #3
    Advanced Member level 5
    Points: 18,280, Level: 32
    pancho_hideboo's Avatar
    Join Date
    Oct 2006
    Location
    Real Homeless
    Posts
    2,849
    Helped
    761 / 761
    Points
    18,280
    Level
    32

    Re: Two tone nonlinear simulation in ADS

    Set all frequencies inside bandwidth of DUT.
    Where all frequencies mean f1, f2, 2*f1-f2, 2*f2-f1.


    1 members found this post helpful.

  4. #4
    Full Member level 1
    Points: 1,109, Level: 7

    Join Date
    Mar 2017
    Posts
    108
    Helped
    0 / 0
    Points
    1,109
    Level
    7

    Re: Two tone nonlinear simulation in ADS

    Quote Originally Posted by pancho_hideboo View Post
    Set all frequencies inside bandwidth of DUT.
    Where all frequencies mean f1, f2, 2*f1-f2, 2*f2-f1.
    How to determine f1 & f2?



    •   AltAdvertisement

        
       

  5. #5
    Advanced Member level 5
    Points: 18,280, Level: 32
    pancho_hideboo's Avatar
    Join Date
    Oct 2006
    Location
    Real Homeless
    Posts
    2,849
    Helped
    761 / 761
    Points
    18,280
    Level
    32

    Re: Two tone nonlinear simulation in ADS

    Show me lower and upper frequencies for 1dB bandwidth of your DUT.

    What analysis method do you use ?



  6. #6
    Full Member level 1
    Points: 1,109, Level: 7

    Join Date
    Mar 2017
    Posts
    108
    Helped
    0 / 0
    Points
    1,109
    Level
    7

    Re: Two tone nonlinear simulation in ADS

    Quote Originally Posted by pancho_hideboo View Post
    Show me lower and upper frequencies for 1dB bandwidth of your DUT.

    What analysis method do you use ?
    Lower frequency 3.4 GHz, Upper frequency 3.6 GHz



    •   AltAdvertisement

        
       

  7. #7
    Advanced Member level 5
    Points: 18,280, Level: 32
    pancho_hideboo's Avatar
    Join Date
    Oct 2006
    Location
    Real Homeless
    Posts
    2,849
    Helped
    761 / 761
    Points
    18,280
    Level
    32

    Re: Two tone nonlinear simulation in ADS

    What analysis do you use ?
    HB or Tran ?

    f0=(3.4GHz+3.6GHz)/2=3.5GHz
    BW=0.2GHz, BW/3=0.0666GHz
    I choose delta_f=50MHz < BW/3

    (1) standard case
    f1=f0-delta_f/2
    f2=f0+delta_f/2

    (2) allevitated case
    f2=f0-delta_f
    f1=f2-delta_f

    or

    f1=f0+delta_f
    f2=f1+delta_f
    Last edited by pancho_hideboo; 18th February 2020 at 14:17.


    1 members found this post helpful.

  8. #8
    Full Member level 1
    Points: 1,109, Level: 7

    Join Date
    Mar 2017
    Posts
    108
    Helped
    0 / 0
    Points
    1,109
    Level
    7

    Re: Two tone nonlinear simulation in ADS

    Quote Originally Posted by pancho_hideboo View Post
    What analysis do you use ?
    HB or Tran ?

    f0=(3.4GHz+3.6GHz)/2=3.5GHz
    BW=0.2GHz, BW/3=0.0666GHz
    I choose delta_f=50MHz < BW/3

    (1) standard case
    f1=f0-delta_f/2
    f2=f0+delta_f/2

    (2) allevitated case
    f2=f0-delta_f
    f1=f2-delta_f

    or

    f1=f0+delta_f
    f2=f1+delta_f
    Analysis HB
    In this case, Is it f-spacing is 50 MHz?



  9. #9
    Advanced Member level 5
    Points: 18,280, Level: 32
    pancho_hideboo's Avatar
    Join Date
    Oct 2006
    Location
    Real Homeless
    Posts
    2,849
    Helped
    761 / 761
    Points
    18,280
    Level
    32

    Re: Two tone nonlinear simulation in ADS

    Quote Originally Posted by Mabrok View Post
    In this case, Is it f-spacing is 50 MHz?
    Yes for standard case.
    If you have an interest about IM5 in addition to IM3, you have to reduce delta_f.
    Last edited by pancho_hideboo; 18th February 2020 at 15:08.


    1 members found this post helpful.

  10. #10
    Full Member level 1
    Points: 1,109, Level: 7

    Join Date
    Mar 2017
    Posts
    108
    Helped
    0 / 0
    Points
    1,109
    Level
    7

    Re: Two tone nonlinear simulation in ADS

    Quote Originally Posted by pancho_hideboo View Post
    Yes for standard case.
    If you have an interest about IM5, you have to reduce delta_f.
    I also want to ask if you have an idea about ACPR or ACLR? Can we simulate one of these parameters using HB simulation in ADS? Thanks



  11. #11
    Advanced Member level 5
    Points: 18,280, Level: 32
    pancho_hideboo's Avatar
    Join Date
    Oct 2006
    Location
    Real Homeless
    Posts
    2,849
    Helped
    761 / 761
    Points
    18,280
    Level
    32

    Re: Two tone nonlinear simulation in ADS

    You have to apply modulated signal for evaluation of ACLR, use envelope analysis which is time variable HB.
    Last edited by pancho_hideboo; 18th February 2020 at 15:20.


    1 members found this post helpful.

  12. #12
    Full Member level 1
    Points: 1,109, Level: 7

    Join Date
    Mar 2017
    Posts
    108
    Helped
    0 / 0
    Points
    1,109
    Level
    7

    Re: Two tone nonlinear simulation in ADS

    Quote Originally Posted by pancho_hideboo View Post
    You have to apply modulated signal for evaluation if ACLR, use envelope analysis which is time variable HB.
    Thanks alot. do you have any documented guide show how to properly use envelope analysis to obtain ACLR for power amplifier?



    •   AltAdvertisement

        
       

  13. #13
    Advanced Member level 5
    Points: 18,280, Level: 32
    pancho_hideboo's Avatar
    Join Date
    Oct 2006
    Location
    Real Homeless
    Posts
    2,849
    Helped
    761 / 761
    Points
    18,280
    Level
    32

    Re: Two tone nonlinear simulation in ADS




--[[ ]]--