PCB Material at 15 GHz to 20 GHz Range

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Hi Experts,

I have a query on the dielectric material to be used at high speed designs.
This is for a digital design and the frequency of the signal will be from 15GHz to 20GHz.What dielectric material will be the best to use?

These are differential signals with 100 ohm controlled impedance.The trace length ranges from 100cm to 120 cm.

Will FR-4 with high Tg suitable at this frequency?I know there could be losses at this frequency but how to calculate how much it will be?Any thumb rules?
Or we should any other material?


Regards,
VJ
 

https://www.rogerscorp.com/index.aspx

RO4000® Laminates
RO4350B™ materials are proprietary woven glass reinforced hydrocarbon/ceramics with electrical performance close to PTFE/woven glass and the manufacturability of epoxy/ glass.

Providing tight control on dielectric constant and low loss while utilizing the same processing method as standard epoxy/glass, RO4350B is available at a fraction of the cost of conventional microwave laminates. No special through-hole treatments or handling procedures are required as with PTFE based microwave materials.

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