Because of the high maintenance needed to monitor and filter spammers from the RF Cafe Forums, I decided that it would
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Below are all of the forum threads, including all
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Post subject: penetrating microwave (high frequency) on water.
Posted: Fri Dec 19, 2008 1:23 am
Joined: Thu Dec 18, 2008 10:56 pm
Location: shah alam,selangor
is there any advantage or disadvantage when using microwave(high frequency) on water?
Posted: Fri Dec 19, 2008 12:22 pm
Joined: Fri Feb 17, 2006 12:07 pm
Location: London UK
From your other post it is clear you are making (permittivity??) measurements.
A lot depends on what is mixed with the water and in what ratio. As I mention in my previous post to you, I always used closed containers like coaxial or waveguide transmission support, or resonant cavities, and a Vector Network analyzer or other impedance bridge methods. Containing the field makes the measurement easier to set up and the results more accurate and repeatable, and the errors calculable with confidence.
The open tank free space approach is obviously important if the water is flowing and not static.
What are you considering for the Free Space Method? There are 2 or 3 ways to approach it in that case. What sort of frequency range are you using?