Broadband Miniaturized Dual-linear Polarization Antenna Based on Short Circuit Loading

Abstract

In this paper, a miniaturized dual-polarization antenna based on short-circuit loading technology is proposed. The horizontal polarization and vertical polarization of the antenna are realized by two dumbbell-shaped feeding structures placed vertically and by the coupling mode of radiation patch. The antenna miniaturization is realized by short circuit loading structure and microstrip radiation patch gap coupling. The bandwidth of the antenna is expanded by double L-type matching network. The antenna is simulated and optimized by simulation software. The simulation results show that the working frequency band of the antenna is 877MHz-965MHz, S(2,1)≤ -24db, Gain≥5.8dB, maximum Gain 6.8dB, and axial cross-polarization ratio less than -27dB.