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line feed patch antenna with CST

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leony

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Hello, do u have any sources that explain modelling patch antenna with line feed using CST? I have made a rectangular patch simulation but could not be succesfull.I was not able to operate my antenna at 2.45 Ghz.
 

Re: line feed fix antenna with CST

Hello leony,

please under examples>transient>antennas. There is an example already included with the software.

Element7k

leony said:
Hello, do u have any sources that explain modelling fix antenna with line feed using CST? I have made a rectangular fix simulation but could not be succesfull.I was not able to operate my antenna at 2.45 Ghz.
Click to expand...
 

Thanx for your help.I did an antenna with edge feed and could obtain a 50 Ohm line impedance.But i thought that I should use an inset line to obtain 50 Ohm without transformers and use transformers with edge feed.So with my edge feed design I need no transformers.Is this correct?
 

Hi,
There are many ways of feeding a microstrip p@tch antenna. Inset fed and edge fed are both used. Even matching using a quarter wave transformer is done in practice. If you use edge feed, the impedance goes as sin(x/W) where 'x' is the offset and 'W" is the p@tch width. If you use inset feed the impedance goes as cos²(2x/L) where x is the inset and 'L is the p@tch length. You are right, if you use edge feed, you don't need a quarter wave transformer. I am not aware of how the bandwidth achieved in both cases compare. May be someone who is knowledgeable can throw some light on this.

-svarun
 

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