In the paper, the hybrid backed-cavity with EBG (Electromagnetic Band-Gap) structure and PEC (Perfect Electronic Conductor) is proposed for Archimedean spiral antenna, which can make the spiral antenna work over the 10:1 bandwidth, without the loss introduced by absorbing materials. Based on the AMC characteristic (Artificial Magnetic Conductor), the EBG is placed in the outer region of backed-cavity to improve the blind spot gain in the low frequency. The PEC at the center of the structure is used to obtain high gain at high frequency. The better antenna performances are achieved in the low profile spiral antenna. A typical spiral antenna with hybrid backed cavity is numerically studied. The novel spiral antenna design with hybrid backed cavity is validated by simulated results.
1.Chinese Acad Sci, State Key Lab Opt Technol Microfabricat, Inst Opt & Elect, Chengdu 610209, Sichuan Prov, Peoples R China 2.No Inst Elect Equipment China, Beijing 100083, Peoples R China 3.Jiangnan Elect Corp China, Jiaxing 314033, Peoples R China
Liu, Chunheng,Lu, Yueguang,Du, Chunlei,et al. The Numerical Simulation of the Broadband Spiral Antenna Design Based on Hybrid Backed-Cavity[J]. JOURNAL OF INFRARED MILLIMETER AND TERAHERTZ WAVES,2009,30(9):931-938.