This story appears in the January 2019 issue of National Geographic magazine. I would never have met Harriett were it not for our mutual friend, Linda. I’m a physician in Northern California; Harriett ...

Abstract: The mutual inductance between two coils is a key parameter in the inductively coupled wireless power transmission. The spiral rectangular coils are easier to implement than the circular ones ...

Abstract: This letter presents a frequency selective absorber (FSR) with a passband and two wide absorption bands. The structure is composed of a resistive layer and a bandpass frequency selective ...