references needed > edaboard

Hello,

I am doing the project on

" A Cavity Backed Strip line to Micro strip Transition for High-Frequency, High-
Speed Multilayer Circuit Boards with V-Shaped Extension ".

The design should be done using Ansoft HFSS.

This is found under the NASA tech briefs
http://www.techbriefs.com/content/view/228/34/

The problem is that this paper does not provide references.

Please provide me the references for this topic.

Also, is there any particular book / books which deals with this topic.

Please help, as Google did not provide useful results for this topic.

Regards,
avinash