Electromagnetics question on Microstrip Step-impedance Low Pass Filter-Why is there a milling gap...

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Electromagnetics question on Microstrip Step-impedance Low Pass Filter
-Why is there a milling gap and how does its size affect the output frequency of the filter.
-What is the role of the substrate
-What is the role of the Ground plane and how does its thickness change the results
-What is the definition of the Feed and the ports.
-What are the error sources that change the results between the theoretical design and actual low pass filter

David · Accepted Answer

Electromagnetics question on Micro-Strip Step-impedance Low Pass Filter 
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-Why is there a milling gap and how does its size affect the output frequency of the 
filter. 
Answer 
Milling gap is provided in the Micro-strip step impedance low pass filter to modify the 
properties of the substrate at local level. This also helps in increasing the impedance of the 
filter up to desired level. This makes the output frequency of the filter higher and sharper cut 
off region is obtained with more dedicated channels.

Electromagnetics question on Microstrip Step-impedance Low Pass Filter -Why is there a milling gap and how does its size affect the output frequency of the filter. -What is the role of the substrate...

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