AMC surface based on spiral strips and its applications for low-profile broadband planar antennas

作者：Li, RongLin; Qin, Yue; Li, Fuyun; Wu, Linjuan; Cui, Yuehui^*

来源：IET Microwaves Antennas & Propagation, 2019, 13(3): 326-333.

DOI：10.1049/iet-map.2018.5489

• planar antennas
• broadband antennas
• UHF antennas
• dipole antennas
• frequency selective surfaces
• microwave antennas
• electromagnetic metamaterials
• metamaterial antennas
• AMC surface
• AMC cell
• planar dipole antennas
• linearly polarised antenna
• dual-polarised antenna
• circularly polarised antenna
• broadband planar antennas
• artificial magnetic conductor surface
• frequency 0
• 68 GHz to 1
• 02 GHz
• 69 GHz to 0
• 96 GHz
• 75 GHz to 1
• 05 GHz

A novel artificial magnetic conductor (AMC) surface based on spiral strips is proposed, which consists of 9 x 9 AMC cells. Each AMC cell includes a spiral strip to increase its inductance, thus featuring a wide bandwidth of 42% for +/- 90 degrees reflection phase. The AMC surface is applied to three planar dipole antennas for lowering the antenna heights, including a linearly polarised (LP) antenna, a dual-polarised (DP) antenna, and a circularly polarised (CP) antenna. It is shown by simulation and experiment that the LP antenna achieves an impedance bandwidth of 40% (0.68-1.02 GHz) for |S-11| < -15 dB and a gain of 8 dBi, the DP antenna realises an impedance bandwidth of 33% (0.69-0.96 GHz) for |S-11| < -15 dB, an isolation of 30 dB, and a gain of 8 dBi, and the CP antenna has an overlapped bandwidth of 33% (0.75-1.05 GHz) for |S-11| < -15 dB and axial ratio lambda(0) to 0.083 lambda(0).

• 出版日期2019-2-27
• 单位华南理工大学