![]() These coils can be fabricated on both rigid and nonrigid surfaces, which means they can be integrated onto printed circuit boards (PCBs) as well as flex circuits. They take up less space than other inductors and thus are suited for any application with size restrictions, such as MEMS or implanted medical devices (like heart pumps). Planar coils are named for the parts of the coil being primarily on the same plane (i.e., nearly flat). To do just that, engineers can use layered shell functionality in the COMSOL® software, which enables them to model all coils on one plane. ![]() When designing these coils, it’s important to calculate both their inductance and resistance, as these factors play a key role in the device’s performance. Found on circuit boards, these coils are a good choice for inductive coupling, especially when space is limited. From blood pressure sensors to electronic money cards, planar coils are widely used.
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