Recent content by yefj

Hello, I have simulated a situation where we have 3 differential lines as shown below. port 1 has no termination so he has to affter SDD23 . From sdd23 we se resonances spaces 1.23GHz one from another. substrate er=4.1 the traxes are 50mm long. How can I link the distance between the resonance...

Hello, I have tried to implement an open circuit microstrip resonator . I got the microstrip resonating at 5Ghz as shown below. However the S-parameters is very bad. Is there a way to improve the matching so It will have a better dip in 5GHz.

Hello BalunCore 'The impedance is the impedance of the line.the material i think has the same er but different quality.the line impedance I think was simulated that how the PCB trace width was made. is there something more which is needed to have a conclution on the plots at previos post? Thanks.

Hello Baluncore,I know that as the los in bigger then tdr slope is larger. all material TDR is plotted together and loss per inch plot is attached. what colclution can we get from these plots ? Thanks.

Hello ,As you can see in the plot bellow I have made several TDR of different materials on one plot. I need to deside which is the best material to use. Also I know that based on (S21_10inch-S21_5inch)/L I find the loss per inch. Two questions: 1.after I find the loss per inch how do I find the...

Hello, the following photo represent TDR of differential straight line SDD11.my line is 8 inch BW is 67GHz. Two questions: 1. I know that artificial ringing is accuring in TDR because we done have infinite BW. How can I see the need for a window in the TDR and what type to use> 2.as you can...

Yes I will read that . regarding the other question could you please explain why longer lines creates steaper phase slopes in S21?

Hello Baluncore,regarding the S21 phase below. Few questions: 1.why the slope gets steeper when the line goes longer? 2.Is there a way I could see this phenomena If I try to look in the resonance frequency electric or magnetic field. If you could please describe How it looks ? "through the...

Hello Baluncore, In every S21 resonant notch I have a small jump in S21 phase. I tried to convert the slope of this little phase jump into group delay and find the length of the floating line . i got 480mm . Am I wrong in my interpresting phase strategy to find floating line length? Is there a...

Hello Baluncore, As you can see below we have er=4.1 and ground plane. At 3.08Ghz we have half wavelength resonance.according to this formula the wavelength is 48.1mm. Half of wavelength is 24.05mm where in reality we have 26mm. So basickally we take the difference between resonant notches and...

Hello , I have a line geting closer to the line connected to the ports. as the distancebetween them gets closer the S21 notches get deeper and deeper. The difference between two peaks is 3GHz. each notch represent a resonance on the floating line. at 6Ghz we have two wavelength at 9GHz three...

In differential port 1 we have same power going threw 1 SE and 3 SE. we get the ouput at 2 SE and 4 SE. suppose 2SE is faulty.What whould be the value of SDD21?how SDD21 in that case? What is the mathematical logic we get -6dB in SDD21? Thanks.

Hello , I have two PCB presented in the photo. The difference between them is the length of the inner line. I have extracted the s2p of the two of them. I know that using the length difference we can extract the s-parameters of the rectrangular fixtures at the edges of the line. What is the...

UPDATE: Hello , I have found the defintion of ICN as shown below in photo and attached document. The first one is integrated cross talk noise,my victim is line 1->2. Next is the coulping from near aggressor lines. S31 S51 S71 NL0 is the coupling from port 3 to 1 ,S31 NL1 is the coupling from...

Hello berkerman, power sum Next is defined as shown below by the attached article. is there some mathematical expression for these terms? 1.MDNEXT(multi distributed NEXT) 2.Normalized MDNEXT.