I'm trying to design a rf energy harvesting circuit specifically at the wifi frequency of 2.4GHz in TSMC 65nm. The circuit design is a rectifier with a differential input. My question would be on the test bench of the circuit. Is it possible to only use a voltage sinusoidal source for modelling the input rf signal? Is it correct that I need to simulate both transient and harmonic balance to test out the design? If so, can I use a port instance as the power source for both analyses?
Do you mean that I should assume a non-modulated signal drive for the wifi signal input for the rectifier since I only need the power delivered?
Would this be a correct setup for the port power source?
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I am currently testing on how to input the correct parameters (i.e dc value, ac magnitude, amplitude value) on the port instance setup above in synopsys custom designer such that it will provide my desired power input (i.e -10 dBm). To confirm if the parameters I set are correct, I would measure the votlage rms on the node of rf(+) and rf(-) above and compare it with the equivalent rms voltage of my desired power input at 50 ohms impedance using the calculator provided here:
To confirm if the parameters I set are correct,
I would measure the votlage rms on the node of rf(+) and rf(-) above
and compare it with the equivalent rms voltage of my desired power input at 50 ohms impedance using the calculator provided here:
Is this a correct assumption?
I believe the most serious uncertainty factor involved with your energy harvesting application is the unknown field strength. You need to refer to assumptions.
Modulation can be considered by pulsing a sine source with a certain duty cycle.
I have not yet considered the input impedance of the rectifier and the matching between source and rectifier since I am still in the rectifier design stage. I am assuming a 50 ohm port instance to represent the antenna for the rectifier test bench simulation.
I believe the most serious uncertainty factor involved with your energy harvesting application is the unknown field strength. You need to refer to assumptions.
I am trying to evaluate the Input Power to the rectifier.
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I am assuming a 50 ohm port instance to represent the antenna
for the rectifier test bench simulation.
No.
If your RF signal is ASK signal, ASK signal is available as multiplication of sinusoidal and vpulse.
And such ideal ASK signal is a little helpful with adjusting duty cycle.
However Wifi signal is not ASK signal.
So there is no duty cycle.
It's complex modulated signal with several 10 MHz bandwidth, and it's pulsed. The envelope is roughly rectangular but with a widely varying duty cycle depending on the data flow.