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50 ohm transmittion line calculation?

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modelstudent

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50 ohm feed line calculation?

hello, i am working on a multiband antenna with subpatch, the main part of the anteena is finished but i dont know how to calculate the feed line dimension, and i just try the dimension one by one now, are there any efficient way that i can get the dimension?
i am using ADS to simulate my antenna.
many thanks!! :p
 
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In ADS Schematic, go to Tools > Linecalc
This is a tool that calculates the required line width.
 

the linecalc only calculate the width of feed line at one operating frequency,doesnt it?
however, my antenna is multiband, which frequency should i input ?will it work?

many thanks~!
 

thats mean i can choose either one to input and get the results?
 

modelstudent said:
after i get the width, then i should adjust the length of the feed line until i get a good S11 results?
Click to expand...

Ooops ... you said that you want a 50 ohm line, so that the line is matched to the 50 ohm source -> no impedance transformation -> length does not matter
 

does the antenna design related to the impedance of feed line?
 
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    saweng

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