RFIC Layout - Transmission Line

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Puppet123

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In RFIC Layout - or > 1GHZ RF IC Layout, when do you use a transmission line versus just using metal interconnect like in lower frequency design ?

Is there a rule of thumb ?
 

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Doesnt it depend on the distance and the design.

I mean in an LNA with a lot of inductors dont you need transmission lines due to the distance between inductors at say 5-30 GHz ?
 

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Puppet123 said:
Doesnt it depend on the distance and the design.

I mean in an LNA with a lot of inductors dont you need transmission lines due to the distance between inductors at say 5-30 GHz ?
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I don't classify Integrated Circuits which operate over 5GHz being as RFIC.If they include Microwave related structures such as Transmission Lines,Couplers,Power Divider/Combiner etc. I call them as MMIC.
 

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