A 5G filtering antenna simultaneously featuring high selectivity and band notch

Abstract

This paper presents a compact and low-profile filtering antenna featuring simultaneously bilateral high selectivity and 5G band notch functionality. The bilateral high selectivity of this quasi-Yagi antenna is achieved by using innovative ground etches instead of microstrips on the top layer. Independent U-shaped split ring on the top layer endows the filtering antenna with an additional property, namely the band notch functionality. By modifying the arm length of split ring, the notched band can completely cover 5G sub-6 GHz (3.4–3.8 GHz). Moreover, the gain of end-fire filtering antennas mostly varies around 4.5 dBi within operational band. The radiation patterns of the proposed antenna ensure a desired antenna performance at different frequencies. The results of the measurements of the S-parameter as well as the gain and the radiation pattern of filtering antenna are consistent with respective simulation results.