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return current - KKPCB

Aluminum Nitride PCB RF Power Layout: Separating Return Current from Heat Spreading

An Aluminum Nitride PCB power layout must release current return and heat through the same controlled interface before the module is approved. RF power boards built on aluminum nitride combine a low-loss electrical path with a high-conductivity thermal path, but the two paths do not always want the same copper geometry. A power island may...