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Tdr And Measurement

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9 Threads found on Tdr And Measurement
This design assumes a certain conductor resistance per km length to use Ohm's Law to measure distance. It ignores EMI induced into long transmission lines, ignores inductance and requires that no transformers be connected when the fault is detected which would cause measurement error. Most line fault detectors use a pulse with tdr method (...)
If I am trying to get an accurate measurement of the isolation of a ferrite circulator, and I use time domain to analyze the reverse isolation, what am I getting? i.e. I can time gate out "tdr pulses" from the isolated port, and get rid of reflectons from the imperfect terminating 50 ohm load. then convert back to (...)
Hi, I am simulating a multilayer semiconductor wave guide structure with metal on top in HFSS which is a straight wave guide as shown in picture 1. I have to do impedance measurement using tdr but I dont understand how does it work. I am doing the interpolating sweep and normalizing the ports too which are the (...)
I don't understand how you want to do a tdr measurement using the VNA, but I am not interested to find. By definition tdr measurements use an oscilloscope and a pulse generator. Check the application note below from Tektronix, which is one of the inventors of this method.
tdr measurement is the standard method, I think.
industry design and validation may use two method to measure pad capacitance, one of them is simple LRC meter, which adopted a electrical bridge connection and tune all the legs to be balanced and calculate the cap (all of the tunning operation is automatic). the other way is using tdr unit, which is an expensive equipement, (...)
Can anybody share some materials of tdr measurement or theory ?
Hello, I am interested in calculating the Capacitance (& perhaps Inductance) values from a tdr measurement along a 2 inch stripline when rise time of driver is about 70ps. I would also like to confirm and verify these values (approximately) with an HFSS stripline model simulated from DC-8GHz. If anyone run into this kind of comparison in (...)
there is several techniques for impedance measurement. one that is useful in RF is using a tdr. A tdr can be built using only a fast pulse generator and an oscope. the pulse is send trough the cable and is reflected if there is a mistmatching. the amount of mismatching is an indication of the impedance (...)