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    Rectenna simulation for Rf energy harvesting on ADS

    i am making an Rf energy harvesting circuit using ADS working on 3 bands 1.8GHZ , 2.1GHZ and 2.4 GHZ and i m getting the Vout very low around 0.002v and i m getting this message during the simulation and i couldnt know whats the problem i have or what i need to add or check can you please help me to check my circuit of i need to add or fix something Click image for larger version. 

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    ##Warning detected by hpeesofsim during DC analysis `HB1'.
    Matrix is singular (detected at node or branch `L2.i').
    Warning detected by hpeesofsim during DC analysis `HB1'.
    Circuit converged after a virtual resistance of 1 TOhms
    was added between each node and ground, and a virtual
    resistance of 1 pOhms was inserted in each current branch.
    Possible causes include floating nodes or missing ground.
    Warning detected by hpeesofsim during HB analysis `HB1'.
    More than one mixing term has landed on frequency 300 MHz.
    Warning detected by hpeesofsim during HB analysis `HB1'.
    More than one mixing term has landed on frequency 2.1 GHz.

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  2. #2
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    Re: Rectenna simulation for Rf energy harvesting on ADS

    L1, L4, L2, L5, L3 and L6 consitute rigid loop.
    So it can not determine DC operation point.

    Set small R for inductor or insert dc-cut for L1, L2 and L3.

    f1=1800MHz=6*300MHz
    f2=2100MHz=7*300MHz
    f3=2400MHz=8*300MHz

    Fundamental Freqquency=300MHz.

    f2-f1=300MHz
    f3-f2=300MHz
    f3-(f2-f1)=2100MHz

    Set f3=2401MHz.

    BTW, why do you set all orders as 1 ?
    Can you understand HB Analysis ?
    Last edited by pancho_hideboo; 8th March 2018 at 16:10.


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  3. #3
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    Re: Rectenna simulation for Rf energy harvesting on ADS

    thank you for your answer yeah i put small resistance in L1 ,L2 and L3 and its correct now i didnt get the that massage i changed also the third frequency but really i am new in ADS so i dont have that much idea for HB analysis but can i ask you please about the output voltage that i have Click image for larger version. 

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    Re: Rectenna simulation for Rf energy harvesting on ADS

    Quote Originally Posted by Asma_didi View Post
    but can i ask you please about the output voltage that i have
    What is your question ?



  5. #5
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    Re: Rectenna simulation for Rf energy harvesting on ADS

    i m trying to get higher voltage but like is shown in the image i m having very low output voltage but i wanna ask also when we hare having 0 hz frequency it written that 2.350 V the output voltage what does that mean ??



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