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Recent content by anh56789

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    Ground pins set up in EM simulation for RFIC inductor

    I got it. Thank you so much!!!
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    Ground pins set up in EM simulation for RFIC inductor

    Hi Volker, Thank you for your response! Your explanation helped me understand better. I did simulate the inductor with the metal frame connected to the ground. Here is my test bench and results. The spacing from the inductor to the metal frame is 30um. So that the Inductance and Q factor does...
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    Ground pins set up in EM simulation for RFIC inductor

    Hi BigBoss, Thank you for your quick response! I think that will make the simulation results become unreliable because, in CMOS technology or SiGe, the VIA from TOP metal to GND doesn't exit. Below is the cross-view of the metal layer that I used in CMOS. As you can see in the picture, I use a...
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    Ground pins set up in EM simulation for RFIC inductor

    Hi, I want to evaluate the performance of the inductor with the effect of the ground shielding similar to this post: https://muehlhaus.com/support/rfic-em-appnotes/inductor-ground-cutout But I'm confused about how to define the voltage for grounding metal around the inductor. Below is the...
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    RF Balun test-bench confusion

    Hi FvM, Thank you for your response!!!. I may not understand you well. Could you explain more? If I connect the output of the balun to a 100 Ohm differential CPW, which load should I choose for the balun? When I use 2 ungrounded ports (50 Ohm each) the input return loss (S11) is quite good...
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    RF Balun test-bench confusion

    Hi, I can only export the S2P file from 25 to 35GHz with a 100 MHz step size due to some security problems. In this file, I also export the center tap of the balun at the output as shown in the test bench. You can connect the center tap of the balun to the ground to improve the imbalance. But...
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    RF Balun test-bench confusion

    Hi BigBoss, This is my test bench for the SP export and the s4p file for the balun.
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    RF Balun test-bench confusion

    Hi BigBoss, Thank you for your quick response! What do you mean when you said I may not understand you. But in my test bench, I want to use 2 ports at the output of the balun so that I can simulate the amplitude and phase mismatch between two output differential signals. "And also, why CS and...
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    RF Balun test-bench confusion

    Hello, I am designing an RF balun to transform 50 Ohm single-ended to 100 Ohm differential. I used the Coilsys tool in ADS to auto-generate the EM model of the balun. I use 3 ports test bench for simulating the S parameters of the EM balun as the below figure. The simulation results are quite...
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