An Ultra Wideband Printed Helical Antenna with Low Profile
This paper presents a compact ultra-wideband strip helical antenna with circular polarization.In order to achieve circular polarization and impedance matching with helix of 1.1 turns,the helix is made of uniform metallic strip instead of traditional metallic wire.Considering the convenience in manufacture,the uniform metallic strip is firstly printed on a substrate with εr = 2.2,h = 0.5 mm,then the substrate is rolled into the shape of cylinder such that a helix is formed.A 50-coaxial cable is directly connected to the helix without an impedance matching section.The ground plane,which is printed on another substrate with εr = 2.2,h = 3 mm,is placed under the helix.To demonstrate this method,a 1.1-turns helical antenna is fabricated,measured and analyzed.Measured results show that the proposed antenna has an impedance bandwidth(S11 ≤-10 dB)of more than 70%,and an axial ratio(AR)bandwidth(AR ≤ 3 dB)of 55%.These wideband circular polarized(CP)characteristics indicate that the proposed antenna has a potential application in wide-band/multi-band wireless communications.
Xihui Tang Ruirui Li Jihong Pei Yunliang Long
Shenzhen Key Lab of Advanced Communications and Information Processing College of Information Engine College of Information Engineering,Shenzhen University,Shenzhen,China Department of Electronics and Communication Engineering Sun Yat-Sen University,Guangzhou,China
国际会议
Progress in Electromagnetics Research Symposium 2014(2014年电磁学研究新进展学术研讨会)
广州
英文
1499-1502
2014-08-01（万方平台首次上网日期，不代表论文的发表时间）