ABSTRACT
Following the brief history of classical complementary dipole antennas, multi-mode resonant design approaches to complementary dipole antennas are introduced. The multi-mode resonant concept is employed to yield wideband linearly polarized and circularly polarized complementary dipole antennas with simple, basic configurations: Balanced planar complementary dipole antennas with dual-band, ultra-wideband, and wideband circularly polarization characteristics are studied. Then, simplified loop-dipole combined antennas under hybrid-mode resonance and dual-mode slotline resonance are investigated. As can be seen, the multi-mode resonant concept can yield complementary dipole antennas with the simplest, basic configuration and remarkably enhance their operational bandwidth. Finally, unbalanced currents in planar magnetic dipole are properly transformed to yield a generalized, multi-mode resonant complementary dipole antenna named planar self-balanced magnetic dipole antennas.
