

Newbie level 4
Calculate Er (Dielectric constant) in stripline
Hi,
Is any one can help or advise of a paper regarding of measureing and calculating dielectric constant and tan delta (of water e.g) in Stripline .
Thanks

1st April 2004, 11:08

Advanced Member level 1
Re: Calculate Er (Dielectric constant) in stripline
Hi,
I think the ring resonator method is best suited for your problem. I don't have time now to search for the papers, maybe this hint will help.
The essence is to couple input and output striplines to a 1wavelength ring resonator resonating at 12 GHz. It will have sharp resonances repeating at almost equidistant frequencies as well. You can mesure transmission (S21) up to 3040 GHz depending of your interest. The geometrical length is fixed, so you can determine Er at each resonance from the resonance condition and Tand from the Q factor. Of course, it is the integral Q including dielectric and metal loss.
flyhigh

1st April 2004, 12:12

Full Member level 3
Re: Calculate Er (Dielectric constant) in stripline
I just find this in my library.
rgds, Al