Abstract

The RF de-sense problem in wireless products becomes serious due to faster digital signals and minimal area in print circuit boards. Company always uses least layers and area of PCB to cost down, which means traditional electromagnetic interference (EMI) suppression methods being inappropriate. This paper proposes an interleaved power transmission line to suppress the noise due to magnetic coupling from power delivery system of digital circuits to RF components. It improves noise suppression by more than 20 dB, in only two layers PCB, with one power trace and three ground traces to replace conventional power trace in the same occupied area.

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