AN AXIAL-RATIO BEAM-WIDTH ENHANCEMENT OF PATCH-SLOT ANTENNA BASED ON EBG

作者：Wang, Zhao Ke; Yuan, Bo^*; Zhang, Xiao Hong; Luo, Guo Qing

来源：Microwave and Optical Technology Letters, 2017, 59(3): 493-497.

DOI：10.1002/mop.30328

• axial ratio beam-width
• axial ratio bandwidth
• electromagnetic band gap
• front to back ratio
• circularly polarize

A low-profile axial-ratio beam-width enhancement of patch-slot antenna based on electromagnetic band gap (EBG) structure is proposed. To achieve the circularly polarized property, a diagonal slot is etched in the center of the radiation patch. The traditional mushroom-like EBG unit cells around the patch are used to suppress the surface wave and improve the front to back ratio. This proposed antenna is printed on the FR4 substrate and fed by a single, conventional coaxial cable with 50 impedance. Measured results show that the impedance bandwidth and 3-dB axial ratio bandwidth of proposed antenna are 128 and 30 MHz, respectively. By using EBG unit cells, the 3-dB AR beam-width can be extended to 232.5 degrees at x-z plane and 258 degrees at y-z plane. The front to back ratio of the antenna is also improved to 25 dB.

• 出版日期2017-3
• 单位杭州电子科技大学