US Patent 11715882 Low-profile magnetic antenna assemblies

An antenna assembly includes a first magnetic substrate having a first surface and a second surface opposite from the first surface. One or more antenna elements are disposed on the first surface of the first magnetic substrate. A microstrip feed line is disposed on the second surface of the first magnetic substrate. A second magnetic substrate is secured to the first magnetic substrate. The second magnetic substrate includes one or more cavities aligned with the one or more antenna elements and the microstrip feed line.