[SI-LIST] 答复: Re: how to measure the coupling effect of the coupled lines with vector network analyzer
- From: <ji-wei_du@xxxxxxxxxxx>
- To: <mike_bihan@xxxxxxxxxxxx>, <levinpa@xxxxxxxxxxxxx>,<si-list@xxxxxxxxxxxxx>
- Date: Thu, 24 Jul 2003 14:17:31 +0800
You can measure S11dd parameter directly with VNA. If you are using ENA =
from Agilent , you do not need external balan ,the embedded math balan =
can help you measure any S parameter .
Thanks and Best Regards=20
Jiwei Du
-----=D4=AD=CA=BC=D3=CA=BC=FE-----
=B7=A2=BC=FE=C8=CB: Bi Han [mailto:mike_bihan@xxxxxxxxxxxx]
=B7=A2=CB=CD=CA=B1=BC=E4: 2003=C4=EA7=D4=C224=C8=D5 12:37
=CA=D5=BC=FE=C8=CB: levinpa@xxxxxxxxxxxxx; List` Si
=D6=F7=CC=E2: [SI-LIST] Re: how to measure the coupling effect of the =
coupled
lines with vector network analyzer
The greatest issue is how to add the stimulus, you had to use giant pad =
for your probe... Even worse, your DUT must be hugh enough to show the =
coupling effect, to evident the L12/C12 from the test noise.
=20
Do you think that possible?
Paul Levin <levinpa@xxxxxxxxxxxxx> wrote:
Dear Liu,
It isn't terribly accurate, but you could try using a "2-way, 180
degree splitter" or a "balun" (available from many RF sources including
Pasternack) to couple a single port of a vector network analyzer
to the two signal ports of your differential pair. Just to make
sure of the fudge factors, test with a pair of 50 ohm terminators
first to see what that reads.
Regards,
Paul
___________________
Liu Ye wrote:
> Hi,experts
> I have no time domain reflectometry, so it is difficult to obtain the =
differential impedance. Can I get the odd mode impedance with a =
frequency domain analyzer? How to input the differential signal to the =
coupled lines?=20
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--=20
Paul Levin
Senior Principal Engineer
Xyratex Storage Systems
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