# Rectenna simulation for Rf energy harvesting on ADS

1. ## 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
##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. ## 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 ?

2 members found this post helpful.

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3. ## 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

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

Originally Posted by Asma_didi