宽带低交叉极化超材料漏波天线的设计
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摘要
基于基片集成波导结构提出了一种新型双层电磁超材料单元,并验证了其左手特性。将超材料单元应用于漏波天线的设计,所设计的天线由15个双层电磁超材料单元组成。将设计好的天线进行加工测试,测试与仿真结果吻合较好,表明漏波天线的工作频带为7.20～12.70GHz,在工作频带内可实现从后向-78°到前向+80°的连续主波束扫描,天线在工作频带内的测试增益均大于10dBi,峰值增益为15.2dBi,3dB增益带宽达到50.2%。此外,该漏波天线具有很低的交叉极化电平,交叉极化始终比主极化低至少30dB。相比于新近文献报道的同类型超材料漏波天线,所设计的天线具有更加优越的电气性能。
A novel double-layered wideband metamaterial based on substrate integrated waveguide structure is proposed and its left-handed property is investigated in this paper.A leaky-wave antenna,which consists of 15 units of the proposed double-layered metamaterial,is designed,fabricated and measured.The measured and simulated results are in good agreement each other,indicating that the designed antenna achieves continuous beam scanning property from backward-78° to forward +80° within its operating frequency band of 7.20～12.70 GHz.The measured antenna gain is better than 10 dBi within its operating frequency band,and the measured 3 dB gain bandwidth is 50.2% with maximum gain of 15.2 dBi.Moreover,the cross-polarization of the designed antenna remains at a level of more than 30 dB below the co-polarization across the entire radiation region.Compared with some related works in the recent reports,this leaky-wave antenna can offer the most wonderful performance.
A novel double-layered wideband metamaterial based on substrate integrated waveguide structure is proposed and its left-handed property is investigated in this paper.A leaky-wave antenna,which consists of 15 units of the proposed double-layered metamaterial,is designed,fabricated and measured.The measured and simulated results are in good agreement each other,indicating that the designed antenna achieves continuous beam scanning property from backward-78° to forward +80° within its operating frequency band of 7.20～12.70 GHz.The measured antenna gain is better than 10 dBi within its operating frequency band,and the measured 3 dB gain bandwidth is 50.2% with maximum gain of 15.2 dBi.Moreover,the cross-polarization of the designed antenna remains at a level of more than 30 dB below the co-polarization across the entire radiation region.Compared with some related works in the recent reports,this leaky-wave antenna can offer the most wonderful performance.
引文
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[10]NASIMUDDIN,CHEN Z,QING X.Multilayered Composite Right/Left-Handed Leaky-Wave Antenna with Consistent Gain[J].IEEE Trans on Antennas and Propagation,2012,60(11):5056-5062.
[11]NASIMUDDIN,CHEN Z,QING X.Substrate Integrated Metamaterial-Based Leaky-Wave Antenna with Improved Boresight Radiation Bandwidth[J].IEEE Trans on Antennas and Propagation,2013,61(7):3451-3457.
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[13]MIZUMORI Y,OKUBO K,KISHIHARA M,et al.Backfire-to-Endfire Radiation Characteristics of CRLH-TL Using Substrate Integrated Waveguide and Metal-Patches[C]∥Asia-Pacific Microwave Conference,Singapore:IEEE,2009:1419-1422.
[14]YANG Qingshan,ZHAO Xiaowen,ZHANGYunhua.Composite Right/Left-Handed Ridge Substrate Integrated Waveguide Slot Array Antennas[J].IEEE Trans on Antennas and Propagation,2014,62(4):2311-2316.
[15]WEITSCH Y,EIBERT T F.Analysis and Design of a Composite Left/Right-Handed Leaky Wave Antenna Based on the H10 Rectangular Waveguide Mode[J].Advance Radio Sciences,2008,6:49-54.
[2]WANG J H,MEI K K.Theory and Analysis of the Leaky Coaxial Cables with Periodic Slots[J].IEEE Trans on Antennas and Propagation,2001,49(12):1723-1732.
[3]JACKSON D R,OLINER A A.Leaky-Wave Antennas[M]∥Balanis C A.Modern Antenna Handbook.New York:John Wiley&Sons Inc,2007.
[4]OLINER A A.Leaky Waves:Basic Properties and Applications[C]∥Asia Pacific Microwave Conference,Hong Kong:IEEE,1997:397-400.
[5]HASHEMI M R M,ITOH T.Evolution of Composite Right/Left-Handed Leaky-Wave Antennas[J].Proceedings of the IEEE,2011,99(10):1746-1754.
[6]BURGHIGNOLI P,LOVAT G,JACKSON D R.Analysis and Optimization of Leaky-Wave Radiation at Broadside from a Class of 1-D Periodic Structures[J].IEEE Trans on Antennas and Propagation,2006,54(9):2593-2604.
[7]XU Hexiu,WANG Guangming,QI Meiqing.ALeaky-Wave Antenna Using Double-Layered Metamaterial Transmission Line[J].Applied Physics A:Materials Science&Processing,2013,111(2):549-555.
[8]XU Hexiu,WANG Guangming,QI Meiqing,et al.Theoretical and Experimental Study of the BackwardWave Radiation Using Resonant-Type Metamaterial Transmission Lines[J].Journal of Applied Physics,2012,12(10):104513.
[9]DONG Y,ITOH T.Composite Right/Left-Handed Substrate Integrated Waveguide and Half Mode Substrate Integrated Waveguide Leaky-Wave Structures[J].IEEE Trans on Antennas and Propagation,2011,59(3):767-775.
[10]NASIMUDDIN,CHEN Z,QING X.Multilayered Composite Right/Left-Handed Leaky-Wave Antenna with Consistent Gain[J].IEEE Trans on Antennas and Propagation,2012,60(11):5056-5062.
[11]NASIMUDDIN,CHEN Z,QING X.Substrate Integrated Metamaterial-Based Leaky-Wave Antenna with Improved Boresight Radiation Bandwidth[J].IEEE Trans on Antennas and Propagation,2013,61(7):3451-3457.
[12]WEITSCH Y,EIBERT T F.Continuous Beam-Steering Leaky-Wave Antenna Based on Substrate Integrated Waveguide[C]∥Second European Conference on Antennas and Propagation,Edinburgh,UK:IET,2007:1-5.
[13]MIZUMORI Y,OKUBO K,KISHIHARA M,et al.Backfire-to-Endfire Radiation Characteristics of CRLH-TL Using Substrate Integrated Waveguide and Metal-Patches[C]∥Asia-Pacific Microwave Conference,Singapore:IEEE,2009:1419-1422.
[14]YANG Qingshan,ZHAO Xiaowen,ZHANGYunhua.Composite Right/Left-Handed Ridge Substrate Integrated Waveguide Slot Array Antennas[J].IEEE Trans on Antennas and Propagation,2014,62(4):2311-2316.
[15]WEITSCH Y,EIBERT T F.Analysis and Design of a Composite Left/Right-Handed Leaky Wave Antenna Based on the H10 Rectangular Waveguide Mode[J].Advance Radio Sciences,2008,6:49-54.