Theoretical Investigation of Magneto-Electric Dipole Antennas Based on Characteristic Mode Analysis

This study investigates the radiation mechanism of magneto-electric (ME) dipole antennas through characteristic mode analysis (CMA). Two distinct resonance modes responsible for the formation of dual resonance points are identified. Furthermore, an analytical investigation on wide dipole antennas is performed, leading to the realization of a perfectly complementary radiation pattern with a maximum front-to-back ratio (FTBR) of 40.16dB. The proposed theoretical framework is further validated through its implementation in ME dipole antennas with more complex structures at mmWave bands. This study innovatively advances the current theoretical framework and provides guidance for future design and optimization of ME antenna.