This FAQ will look at the Butler matrix, a widely used passive technique for implanting and ESA, which is not well known.

To address this, a planar-cavity-complementary-dipole (PCCD) antenna is investigated ... the establishment of spatial phase relationships, pattern multiplication, and the influence of antenna height ...

With an impressive low profile of just 0.047 times the low-frequency wavelength, the prototype presents an efficient radiation pattern, achieved simultaneously together with a 12:1 impedance ...

Abstract: A filtering transmitarray antenna (TA) based on a filtering antenna to filtering antenna (FA-FA) structure is proposed. The TA unit consists of two identical magnetoelectric (ME) dipoles ...