To maintain compactness, the proposed antenna design utilizes multi-functional capacitive parasitic elements. These elements radiate at 28 GHz and generate two radiation nulls at 31.5 GHz and 55.5 GHz ...

Coil64 is inductance coil calculator, that allows to calculate the single-layer and multi-layer air core inductors, the ferrite core inductors or chokes, planar coils on PCB etc.

Simulated and measured results both confirm that the spherical array antenna can generate stable steering beams with gain variation of less than 2dBi when the scanning angle θ0 varies from 0° to 90°.