Dual-band Printed Monopole Antenna with 1-D EBG Ground Plane
A dual-band printed monopole antenna was designed and realized at the corner of a rectangular one-dimensional electromagnetic bangap(1-D EBG)ground plane.Two monopole antennas with different polarization are placed on two different edges of the ground plane and are fed by a port at the corner of the rectangular ground plane.The lengths of the two monopoles are also different,which leads to different resonant frequencies.When each monopole is positioned horizontally close to an ordinary ground plane,the antenna cannot radiate energy efficiently.In order to make the antenna radiates efficiently,1-D EBG structures with different energy bandgaps were inserted at different edges of the ground plane.The improved radiation efficiency of the dual-band 1-D EBG backed antenna is due to the in-phase reflection characteristics within a certain frequency band; these characteristics are similar to those of a 2-D mushroomlike EBG structure.The designed antenna covers DCS 1800(1.71 GHz~1.88 GHz),PCS(1.85 GHz~1.99 GHz),and WLAN 802.11 b/g(2.4 GHz~2.4835 GHz)frequency bands.Because the frequency bands of the antenna are within the operating bandwidth of each 1-D EBG structure,the degradation of the radiation performance of the antenna is minimized.The radiation efficiency was measured to be higher than 70%within all the operating frequency bands.In addition,the radiation pattern is y-directive in the lower frequency band and the radiation pattern is x-directive in the higher frequency band,because of the effect of the 1-D EBG ground plane.The designed antenna could be applied to rectangular type wireless communication devices supporting 3G and WLAN environments,such as tablet personal computers and laptop computers.
S.H.Kim D.J.Kim J.Y.Lee B.H.Shin J.H.Jang
School of Information and Communications,WCU Department of Nanobio Materials and Electronics Gwangju Institute of Science and Technology(GIST)261 Cheomdan-gwagiro,Buk-gu,Gwangju 500-712,Korea
国际会议
Progress in Electromagnetics Research Symposium 2011(2011年电磁学研究新进展学术研讨会)
苏州
英文
230-233
2011-09-01（万方平台首次上网日期，不代表论文的发表时间）