A Compact Dipole Filtering Antenna With Electromagnetic Coupling

A compact filtering antenna with excellent edge selectivity is proposed in this paper. The antenna consists of a driven dipole and two parasitic dipole (high-frequency dipole and low-frequency dipole), which operate through magnetic coupling and electric coupling, respectively. To demonstrate our design, simulations were performed on the antenna. The results show that the proposed antenna exhibits good filtering and radiation characteristics, with a 30% operating bandwidth, stable in-band gain, and over 30 dB out-of-band suppression.