Theory and prctice mismatch

Status
Not open for further replies.
S

Salving

Member level 1
Joined
Mar 31, 2012
Messages
35
Helped
1
Reputation
2
Reaction score
0
Trophy points
1,286
Activity points
1,515
Please, someone, need help with next problem.
I'm designing a microstrip patch antenna, freq - 2 ghz, subs - fr4 with cst mw studio.
When i increase the height of the substrate(from 0.4 to 0.8 and to 1.6 mm) radiation efficiency increases. But in theory it must come down with increasing the height. What is the solution of this?
 

There are a lot of factors involved in it, you cant say that just by increasing substrate thickness you will get an increase in radiation efficiency. If you increase the substrate thickness then the theory of quasi TEM is no more valid and things like this. It is complex expression please review it again.
 

But could you give me some ideas why it increases?
 

Please read the first two chapters of "R. Ludwig & P. Bretchko, RF Circuit Design: Theory and Applications".
 

Status
Not open for further replies.

Similar threads

Menu
Log in
Register
Cookies are required to use this site. You must accept them to continue using the site. Learn more…