A Compact Pattern‐ and Polarization‐Reconfigurable Dielectric Resonator Antenna

ABSTRACT In this letter, a compact pattern‐ and polarization‐reconfigurable dielectric resonator antenna (DRA) based on complementary source is proposed. The antenna consists of a dielectric resonator (DR), four metallic rods, and two input ports. The DR operates in mode, acting as a magnetic dipole, while the metallic rods function as electric dipoles, forming different complementary sources. By switching the excited modes of input ports and ON/OFF states of four p‐i‐n diodes, the antenna generates eight modes. These modes include broadside modes () with linear polarization at , and tilted modes () at , respectively. Thus, the antenna realizes reconfigurable pattern and polarization. A prototype is fabricated and verified. The fabricated antenna features a compact size of ( represents the free‐space wavelength at 3.55 GHz). The measured overlapped under −10 dB is 3.28–3.84 GHz (15.7%), covering the 5G‐N78 band.