Front-to-back ratio and half-power beamwidth improving for 4G/5G base station antenna

A simple wideband planar antenna with a separated fence structure is presented in this study for 4/5G base station application. To improve the front-to-back ratio (FBR) and half-power beamwidth (HPBW) of the proposed antenna, five parasitic separated fence structures are designed. This design can effectively suppress the surface wave propagating along the metal ground and increase the radiation performance of the proposed antenna in the low elevation area. After integrating the fence, the FBR of the proposed antenna is improved by 6 dB on average. And the HPBW is increased by 19 degrees ${19}<^>{{}<^>{\circ}}$ on average above 3 GHz. Furthermore, a 1x4 $1\times 4$ linear antenna array is designed and analysed. The measured results display that the proposed antenna achieves a wideband of 47.3% (2.22-3.64 GHz) for |S-11|<= -10 dB with an isolation higher than 30 dB, which are in agreement with the simulations. The average HPBW, FBR, and gain of the proposed antenna is about 85 degrees ${85}<^>{{}<^>{\circ}}$, 22 dB, and 6.9 dBi in the operating band.