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the difference between analog and RF layout

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who can share me with the main difference between analog and RF layout ?


materail/document about RF layout would be appreciate.
 

hi,

main difference is in the complexity of the layout. Analog are more complex than RF layout. But you have to very care ful while designing the RF Layout, as it can really make you cry if you dont follow basics of RF layout.

I will soon Upload the articles and Marterials for you.
 
Analog layout primarily values matching, symmetry, dummies
to minimize errors from lithography, proximity, thermal
influences.

RF layout tends to have little concern for DC accuracy,
but a lot for coupling and losses, impedance matching
and things of that sort. When you get to tens of GHz it's even
crazier as geometry becomes on the order of wavelength.
 
Quite correct what you're saying, save ...

dick_freebird said:
When you get to tens of GHz ... geometry becomes on the order of wavelength.
Click to expand...
tens of GHz: 3cm .. 3mm (ok, vacuum light speed)
RFIC core dimensions: say several 100µm .. 100nm
You're right, however, as the connections to the pads and to the pins have to be considered.
 

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    egg

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at such high frequency, your trace might behve as transmission line rather than lumped one....leading to transmission line behaviour.....
more inductive at high frequecy.. you mighnt need EM simulaiton to check for the post layout performance...

grounding is more important in RF layout.. preferably true(substrate) ground.....
 

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    egg

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shashikumar.22 said:
hi,

main difference is in the complexity of the layout. Analog are more complex than RF layout. But you have to very care ful while designing the RF Layout, as it can really make you cry if you dont follow basics of RF layout.

I will soon Upload the articles and Marterials for you.
Click to expand...


Thanks, I am look forward to your articles and Marterials.
 

Hi egg,

I have attached some books and article for your help. They might be sufficient for your help, well incase you need any help you can post your issue.
 
as said by deepak, at higher frequency , your interconnect will act as an transmission line. You have to follow the rules according to the transmission line. If your design need the lesser noise then you should model the corners very well.

Added after 4 minutes:

here is image for corner
 

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    egg

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here are some more article related to transmission line
 

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    egg

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Dear kumar,

you are really a selflessness guy, thanks so much, your articles are great help for me!
 

Hi Egg,

Thanks, its my Pleasure to help as far as i can. I will be glad if i can help you further.

shashikumar
 

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