cavity model problem: eigen mode coefficients calculation

Hello,

I have a problem understanding a derivation of the eigen mode coefficients of the cavity model of a circular disk and an annular ring microstrip antennna. A summary of this derivation is given in the book: Microstrip antenna design handbook, Ramesh Garg et al., Artech House 2001, pp326-327. The derivation of these coefficients involves some integrations that are not fully outlined. Immediately after that the solutions are given. I tried Maple without any result. I would really like to understand the derivation in detail. Does anuone have any relevant information regarding to this problem? Thank you.

Best regards

Hello!

I don't have enough time now to give you detailed explanation..
In the meantime please look on the (without comments) derivation in attachment and try to understand..

Regards

eirp

Hello,

First of all, thank you for your respons.
The outline you gave explains the part I almost completely understood. My problem is primerly the evaluation of the integrals for the calculation of the mode coefficients. I tried a lot, but there is no way I can get the end result as given in the book on p327.

Best regards.

Could you please include the part you didnt understand. Maybe in .pdf format?

Hello,

you may find a scan of the relevant pages and some accompanying notes In attachment.

Thanks.
Best regards.