microwave vco
 

Hi,I am student & curiously want to build a practical ,high frequency
spectrum analyzer ,
Do you have any comment about " matjaz vidmar,s53mv" articles on VHF
COMMUNICATION magazine ?
Has any one worked on it?
I've heard there are some problem on the " microwave vco" , which is
one of the those articles ?is it practical? Is it simple to build?
What is the epsilon (r) of glassfiber epoxyFR4 ?
Any comment?
Any help would be most appreciated.