基于Salisbury屏幕的UHF雷达频谱搬移
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摘要
为了减缩雷达反射截面(RCS),提高工作带宽,该文基于时控反射面提出一种新型Salisbury屏幕,研究UHF雷达的频谱搬移。首先利用电磁特性的可控性,设计一种由可调电阻层、介质层和金属接地层构成的反射调制板,然后构建动态二相传输线等效电路,并且在周期性频率选择表面(FSS)加载一层电感。理论推导和仿真验证表明该屏幕能对大带宽多方向、不同极化的UHF雷达来波信号进行频谱搬移,减缩RCS,降低远距离移动目标的检测概率。
To reduce Radar Cross-Section(RCS),improve operation bandwidth,this paper proposes an innovative Salisbury screen based on time-controlled surface and researches the frequency shifting of UHF radar signal.First,a reflective modulation board which is composed of adjustable impedance sheet,dielectric spacer and grounded slab is presented by using the controllability of electromagnetic properties.Second,the equivalent circuit of dynamic two-phase transmission line is established,and an inductance layer is loaded on a periodic Frequency Selective Surface(FSS).Theoretical derivation and simulation results show that Salisbury screen can realize the spectrum shifting for UHF radar signal with large bandwidth,multi-directional,as well as different polarizations.Moreover,this screen can reduce RCS and detection probability of the long distance moving target.
To reduce Radar Cross-Section(RCS),improve operation bandwidth,this paper proposes an innovative Salisbury screen based on time-controlled surface and researches the frequency shifting of UHF radar signal.First,a reflective modulation board which is composed of adjustable impedance sheet,dielectric spacer and grounded slab is presented by using the controllability of electromagnetic properties.Second,the equivalent circuit of dynamic two-phase transmission line is established,and an inductance layer is loaded on a periodic Frequency Selective Surface(FSS).Theoretical derivation and simulation results show that Salisbury screen can realize the spectrum shifting for UHF radar signal with large bandwidth,multi-directional,as well as different polarizations.Moreover,this screen can reduce RCS and detection probability of the long distance moving target.
引文
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[2]WANG C,CHEN M,LEI H,et al.Radar stealth and mechanical properties of a broadband radar absorbing structure[J].Composites Part B:Engineering,2017,123:19-27.doi:10.1016/j.compositesb.2017.05.005.
[3]PANG Y,CHENG H,ZHOU Y,et al.Ultrathin and broadband high impedance surface absorbers based on metamaterial substrates[J].Optics Express,2012,20(11):12515-12520.doi:10.1364/OE.20.012515.
[4]LI W,CHEN M,ZENG Z,et al.Broadband composite radar absorbing structures with resistive frequency selective surface:Optimal design,manufacturing and characterization[J].Composites Science and Technology,2017,145:10-14.doi:10.1016/j.compscitech.2017.03.009.
[5]CALAOZ C and ITOH T.Electromagnetic Metamaterials:Transmission Line Theory and Microwave Applications[M].Wiley,2006:105-140.
[6]周禹龙,曹祥玉,高军,等.双频频率选择表面及其在微带天线宽带RCS减缩中的应用[J].电子与信息学报,2017,39(6):1446-1451.doi:10.11999/JEIT160854.ZHOU Yulong,CAO Xiangyu,GAO Jun,et al.Dualband frequency selective surface and its application to wideband RCS reduction of the microstrip antenna[J].Journal of Electronics&Information Technology,2017,39(6):1446-1451.doi:10.11999/JEIT160854.
[7]WU T K.Frequency Selective Surface and Grid Array[M].New York:Wiley,1995:1-10.
[8]BOZZI M,PERRENGRINI L,WEINZIERL J,et al.Design,fabrication and measurement of frequency-selective surfaces[J].Optical Engineering,2000,39(8):2263-2269.doi:10.1117/1.1305261.
[9]路宝,龚书喜,凌劲,等.一种新型频率选择表面及其在天线雷达散射截面减缩中的应用[J].电子与信息学报,2010,32(1):199-202.doi:10.3724/SP.J.1146.2009.00046.LU Bao,GONG Shuxi,LING Jin,et al.A novel frequency selective surface structure and its application to RCSreduction of antennas[J].Journal of Electronics&Information Technology,2010,32(1):199-202.doi:10.3724/SP.J.1146.2009.00046.
[10]XU H,BIE S,XU Y,et al.Broad bandwidth of thin composite radar absorbing structures embedded with frequency selective surfaces[J].Composites Part A:Applied Science and Manufacturing,2016,80:111-117.doi:10.1016/j.compositesa.2015.10.019.
[11]COSTA F,MONORCHIO A,and MANARA G.Analysis and design of ultra thin electromagnetic absorbers comprising resistively loaded high impedance surfaces[J].IEEETransactions on Antennas and Propagation,2010,58(5):1551-1558.doi 10.1109/TAP.2010.2044329.
[12]GILL N,PUTHUCHERI S,SINGH D,et al.Critical analysis of frequency selective surfaces embedded composite microwave absorber for frequency range 2-8 GHz[J].Journal of Materials Science:Materials in Electronics,2017,28(2):1259-1270.
[13]ZENG X,ZHANG L,WAN G,et al.Tunable and broadband radar absorber based on PIN diodes controllable FSS[C].11th International Symposium on Antennas,Propagation and EMTheory(ISAPE),Guilin,China,2016:720-722.
[14]QI K,YUAN X,and WANG Y.A tunable microwave absorber based on active frequency selective surface[C].Progress in Electromagnetics Research Symposium Proceedings,Guangzhou,China,2014:791-793.
[15]COSTA F,GENOVESI S,and MONORCHIO A.Afrequency selective absorbing ground plane for low-RCSmicrostrip antenna arrays[J].Progress in Electromagnetics Research,2012,126:317-332.doi:10.2528/PIER12012904.
[16]WANG H,KONG P,CHENG W,et al.Broadband tunability of polarization-insensitive absorber based on frequency selective surface[J].Scientific Reports,2016,6:1-8.doi:10.1038/srep23081.
[17]WANG Y and TENNANT A.Time-modulated reflector array[J].Electronics Letters,2012,48(16):972-974.doi:10.1049/el.2012.1893.
[18]WANG Y and TENNANT A.Experimental time-modulated reflector array[J].IEEE Transactions on Antennas and Propagation,2014,62(12):6533-6536.doi:10.1109/TAP.2014.2362129.