Tag: RF Circuit
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What Is Crosstalk? Understanding Parasitic Coupling in PCB Traces
Crosstalk is an unavoidable phenomenon in high-speed digital circuits and densely routed PCBs. In practical design work, it is often discussed as a set of rules—such as increasing trace spacing, routing orthogonally, or placing ground traces nearby—while the physical reasons why these rules work are rarely explained in depth. As a result, crosstalk tends to…
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Smith Chart Basics: Effective Use in RF Design
The Smith Chart is characterized by its beautiful arcs representing the magnitude and phase of the reflection coefficient. By utilizing this chart, it is possible to visually determine the values of circuit elements needed for impedance matching in high-frequency circuit design. Particularly, properly matching impedance between various components such as transmitters and antennas is crucial…