Dual-band stacked patch antenna with wide e-plane beam width and stable gain at both bands

摘要

A dual-resonant, semi-circular sector patch antenna is properly incorporated to a planar self-balanced magnetic dipole antenna and lead to a novel triple-resonant, dual-band planar antenna which has characteristics of wide E-plane beam width and stable gain at both bands in this work. Design approach with a group of approximate closed-form formulas is proposed to initially calculate value of the main parameters of the antenna. In the numerical and experimental verifications, it is demonstrated that the antenna operates at 2.4-2.48 and 4.75-5.95 GHz for reflection coefficient smaller than -10 dB. The antenna exhibits unique characteristics of wide E-plane half-power beamwidths of 91 degrees/115 degrees, and stable in-band average gain of about 4-5 dBi at both bands owing to the nearly complementary frequency dispersive characteristic of the radiation pattern in both principal-cut planes. As seen, the antenna can cover wide wireless communication spectra, which makes it promising to get applications in future developments of multi-functional WLAN/RFID antennas, C2C communication antennas, and light-weight, compact UAV antennas without bulky reflectors.