Quasi-Isotropic Radiation Pattern Synthesis Using Triple Equivalent Magnetic Current Sources Based on Open-Ended Cavity Antenna

This paper proposes a quasi-isotropic antenna design method based on open-ended cavity antenna using triple equivalent magnetic current sources. By cutting the slit on the side wall of the open-ended cavity antenna, the omnidirectional radiation pattern of the open-ended cavity antenna is transformed into a quasi-isotropic radiation pattern. The proposed quasi-isotropic antenna has a gain variation of 3.7 dB and an impedance bandwidth of 100 MHz (center frequency is 2.45 GHz).