Seeking the original reference for a microstrip line impedance formula
I'm making a comparison between several microstrip line impedance formulas, and I found the following formula :
It was in this lecture:
(slide 18), original source here:
Would someone know the reference for this formula ?
This reference offers a good comparison between a number of the formulas for microstrip impedance:
Another very good resource is the Transmission Line Design Handbook by Brian Wadell which also has a good bibliography on the subject of microstrip formulas.
On the microwave radio frequency website
There are such formulas, unfortunately, currently only supports Chinese
Many thanks for your answers.
@Dale xiao: could you please give us the link towards the Chinese website ?
I downloaded the Arditi microstrip paper from 1955, he did not show this formula. See:
I have some old books gathering mold in a box somewhere, I will find them an get an answer to this question.
Found it in ITT's reference data for radio engineers, 1983, sixth edition, page 24-25.
The formula came from D.D. Grieg and H.F. Engelmann, "Microstrip - New Transmission Technique for the Kilo-Megacycle Range, proceedings for IRE, Vol. 40, Dec. 1952. There are other reference, let me know if they are needed,
I will download that paper later to check it out.
Cool stuff, I like microwave history.
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