Fig. 4: Multipole expansion of the antenna radiation pattern.
From: Genetically synthesized supergain broadband wire-bundle antenna

ED, MD – electrical and magnetic dipoles, EQ, MQ – quadrupoles and EO, MO – octupoles contributions.
From: Genetically synthesized supergain broadband wire-bundle antenna

ED, MD – electrical and magnetic dipoles, EQ, MQ – quadrupoles and EO, MO – octupoles contributions.