Tutorial-11: Resolving Differences between Ideal and Vendor Library Results

[@MrRijubratapal]

Very informative video again. Swap features will surely save times. Also the quality factor calculation from template is very handy.

[@peimanparand]

thanks so much very helpful

[@behnooshmeskoob1003]

Thanks for all these educational videos. When putting CAPQ or INDQ, should we change the frequency of these elements to the center frequency of the design? Or the default 100 MHz doesn't make much difference? Thanks.

[@BhargavaAnurag]

Hi, Every manufacturer mentions Q at a specific frequency (usually 100 MHz) and that's what you need to mention. If they mention Q at different frequencies then you can select whatever is closest to your actual design frequency.

[@behnooshmeskoob1003]

@@BhargavaAnurag Thanks a lot for your response. May I request you to please have an educational video about envelope simulation? (If it isn't already done) Your videos are extrdmely helpful for my research and I immensely appreciate it.

[@BhargavaAnurag]

@@behnooshmeskoob1003 That's in pipeline and we will reach there soon.

[@eeengineers3958]

@@BhargavaAnurag So, basically we are indicating the loss resistance associated with the inductor. Generally, this loss resistance is fixed. Q and Reactance change with frequency.

[@sunilkumar-dt8ug]

Hi Anurag....how to download murata comp lib....could you please share any link.

[@BhargavaAnurag]

Hi Sunil, This one page give you access to many vendors and by clicking on their name, you can find the page from where you can download ADS Component Library from respective vendor: www.keysight.com/us/en/lib/resources/miscellaneous/vendor-component-libraries-1490117.html

[@yashshah17]

@@BhargavaAnurag sir, are these libraries free to download ?

[@BhargavaAnurag]

@@yashshah17 yes, vendors don’t charge for such libraries

[@yashshah17]

@@BhargavaAnurag thank you sir

[@yonglong-y5j]

Very nice videos, however i have a question about the difference between 'save a copy as' and directly 'copy cell' ，would you please tell me the difference? thank you very much

[@BhargavaAnurag]

They aren't much different. Options are provided for different thinking minds...😊 Advantage with copy cell approach is to rename main design as well as the dependent sub-circuits in one shot which wouldn't be the case with Save As. Hope this helps?

[@karishmagowda9749]

Hello sir, thank you for your videos! They have guided me in designing rf circuits so far. But I'm facing difficulties when trying em cosimulation for vendor components. The schematic simulation works fine. But i don't seem to understand where I'm going wrong with vendor. I have used mgap in my circuit and i think that is the cause of the issue. Like my cosimulation graphs aren't matching. And there's no proper manual to know what steps to follow when using mgap or vendor components for cosimulation. So if you could make a step by step video on em cosimulation for vendor components, it would be extremely helpful. PLease do consider my request. Thank you.

[@BhargavaAnurag]

Hi Karishma, I replied to you separately on another platform on this already. I prefer to use MLIN(Pad)-MGAP(Spacing)-MLIN(Pad) kind of approach in most of my schematic designs simply because it offers an opportunity to model the impedance discontinuity that will arise wherever your interconnect transmission lines between the components joins with the SMT component's pad. You can deactivate schematic components at the stage where you want to create layout so that any inherent footprints included in the SMT models doesn't interfere with the layout generation or the SMT footprints that is obtained by MLIN-MGAP-MLIN structure.

[@karishmagowda9749]

@@BhargavaAnurag Got it sir, thank you so much!

[@yuchansong8725]

Hi, I would like to check the quality factor of one of the murata capacitors. I used the template (S2 port capacitor CRQ) in the data display as you did.But it seems it shows somewhat random and incorrect data. May I know why? Basically, how do you expect the Q factor of the murata capacitor to be around 100? I want to check more accurate Q factor of capacitor

[@BhargavaAnurag]

Hi Yuchan, Here is what I would recommend for Capacitance as well as Q-factor calculations: 1. Place a Capacitor on the schematic and setup 1-port S Parameter simulation, ground the 2nd terminal. 2. Run S-Parameter simulation and write following equations on the data display page: myZin=stoz(S11) myCap=-1/imag(myZin)/(2*pi*freq) myQ=-imag(myZin)/real(myZin) Cap Q-factor normally is 500 or higher but again it depends on the size of the Cap and freq at which you are looking at. Also, usually datasheet of Cap and Ind will surely mention Q-factor at some frequency...sometimes it is 100MHz and in other cases it may be different. Hope this helps...

[@yuchansong8725]

@@BhargavaAnurag Thank you so much for your help! Yes, I just tried your equation and it's similar to the datasheet given from suppliers

[@yuchansong8725]

I would like to know more about how we get information that we can't get from a datasheet. I really appreciate this video as I do for the rest of videos

[@BhargavaAnurag]

Sorry, I didn't get your question. Kindly rephrase what you want to ask....

[@yuchansong8725]

@@BhargavaAnurag Like you mentioned in Tutorial-11 about Q factor (at the end of the lecture, 5 minute ADS), vendors don't indicate all electrical properties. I recently had to work with a component but the company doesn't provide ADS schematics and even a proper datasheet. Come to think of it, the question I asked is coming from my lack of RF knowledge and ADS