基于TM_(50)模的高增益贴片天线
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摘要
本文提出了一个基于TM_(50)模的高增益方形贴片天线.在TM_(50)谐振模式下,天线表面会有2段与辐射边缘相反的电流,通过在天线表面开槽,可使贴片表面的2段反相电流各自形成回路,从而很好地去除TM_(50)模的4个旁瓣.与此同时,由于削弱了反相电流,开槽后的天线是由3段同相电流叠加而成,这就等同于3个工作于TM_(10)模的天线单元共同作用的效果.通过调节槽型缝隙,天线单元最大增益可达到13. 3 dB.
In this study,a high-gain square patch antenna based on the TM_(50) mode is proposed.Owing to the operation of the TM_(50) mode,there is a pair of reversed-phase currents comparing with the radiating edges on the surface of the antenna.By introducing transverse slots along the central line of the patch,each of the two reversed-phase currents are interrupted to circulate with little radiation; thus,the four side-lobes of the TM_(50) mode can be suppressed well.Simultaneously,because the reversed-phase current is weakened,the slotted antenna is superposed by three inphase currents,which providean effect equivalent to that of three antenna elements operating under the TM_(10) mode.By adjusting the size of the slots,the maximum gain of the antenna can reach 13. 3 dB.
In this study,a high-gain square patch antenna based on the TM_(50) mode is proposed.Owing to the operation of the TM_(50) mode,there is a pair of reversed-phase currents comparing with the radiating edges on the surface of the antenna.By introducing transverse slots along the central line of the patch,each of the two reversed-phase currents are interrupted to circulate with little radiation; thus,the four side-lobes of the TM_(50) mode can be suppressed well.Simultaneously,because the reversed-phase current is weakened,the slotted antenna is superposed by three inphase currents,which providean effect equivalent to that of three antenna elements operating under the TM_(10) mode.By adjusting the size of the slots,the maximum gain of the antenna can reach 13. 3 dB.
引文
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[2] Feresidis A P,Vardaxoglou J C.High gain planar antenna using optimised partially reflective surfaces[J].Microwaves Antennas&Propagation IEE Proceedings,2001,148(6):345-350
[3] Gardelli R,Donzelli G,Albani M,et al.Design of patch antennas and thinned array of patches in a Fabry-Perot cavity covered by a partially reflective surface[C]∥European Conference on Antennas&Propagation.IEEE,2006
[4] Xiang H,Jiang X. Design of a high gain microstrip antenna array at Ku-band[C]∥WRI International Conference on Communications&Mobile Computing. IEEE Computer Society,2009
[5] You C S,Hwang W.Gain enhancement method of microstrip antennas by dielectric cover,considering bandwidth[C]∥Antennas&Propagation Society International Symposium.IEEE,2005
[6] Gautam A K,Singh M.Design of gain enhanced stacked rectangular dielectric resonator antenna for C-band applications[C]∥International Conference on Computing for Sustainable Global Development.IEEE,2016