2014 2014 292 Journal of Naval Aeronautical and Astronautical Vol.29 No.2 1673-15222014 02-0127-04 DOI: 10.7682/j.issn.1673-1522.2014.02.006 1 2 1 2 1. 264001 2. 101123 Tightly Coupled Array TCA TCA CST TCA VSWR<24.5 12.1~9.5 GHz TCA 10.4 11.8~18.8 GHz TN822 A TCA RFSS TCA Vivaldi TCA Wheeler [1-3] 1 a d h GP [4-5] TCA TCA TCA C L Munk [6] 1 b Z in = jωl +1 (jωc) + η 0 //Z GP TCA η Ground Plane GP 4.5 1 0 = 120πΩ [7] Z GP = jη 0 tan(2πh λ) 9 1 Volakis [8-11] TCA 1 c h < λ 4 10 1 Moulder [12] C Z GP TCA 2.1~9.5 GHz -40 ~40 TCA 2 4.5 1 [13] 14.2 1 TCA 4.4 1 TCA GP Resistive Frequency Selective Surface RFSS TCA CST 2013-12-24 2014-02-12 ZR2012FQ004 1978-1 TCA a a Schematic diagram of structure 耦合电容
128 29 η 反射系数 η b b Equivalent circuit 频率 : 栅格形 : 栅格形 b b Reflection coefficient 驻波系数 相位 ( ) 2 RFSS Fig.2 Grid RFSS 3 RFSS TCA 频率 : 驻波系数 : 相位 d = 4.57 mm c h = 14.2 mm cvswr and phase of TCA input impedance 3 b RO4003 1 t = 0.508 mm RFSS h 1 Fig.1 Tightly coupled dipole array R 2 RFSS RFSS 2 aγ RFSS C d = 4.57 mm GP h 1 = 7.1 mm TCA 3 c w 1 = 0.4 mm R s = 33 Ω RO4003 ε r = 3.38 t 1 = 0.508 mm CST RFSS ε Metal Frequency Selective SurfaceMFSS 2 b MFSS 1 RFSS 4~16.4 GHz 0.610.6 GHz RFSS GP GP RFSS TCA 3 a X F Z in = jωl +1 (jωc) + Z GP //η 0 Z GP = η 0 (1 + Γ) (1 - Γ) RFSS ε a a Schematic diagram of structure ε a a Schematic diagram of structure b bunit cell of interdigital dipole element
2 129 η / ( ) η η c c Equivalent circuit 3 RFSS TCA Fig.3 TCA with grid RFSS 10 10 4 101 mm 101 mm 14 mm 4 10 10 Fig.4 10 10 antenna array 4 RFSS TCA 2 b RFSS TCA RFSS MFSS GP TCA f = c 2h 3 TCAGP TCA 5 a 5 b 5 驻波系数 频率 : 未加载 : 加载 : 加载 a avswr b b Phase of TCA input impedance 5 TCA Fig.5 VSWR and phase of TCA input impedance with different load TCA GP 5 TCA 10.6 GHz 2 TCA h = λ 2 1 b Z GP = 0 TCA f = c 2h 频率 : 未加载 : 加载 : 加载 TCA GP MFSS 5 MFSS TCA 10.6 GHz MFSS GP TCA GP RFSS 5 TCA 1.8~18.8 GHz -40 ~40 2 10.4 1 RFSS 3 c R TCA GP TCA TCA RFSS GP CST TCA RFSS RFSS GP TCA 10.6 GHz 4.5 12.1~9.5 GHz RFSS TCA 10.4 11.8~18.8 GHz TCA RFSS
130 29 Antennas and Propagation Society International Sympo- sium. ColumbusOHUSA.Ohio State University [1] ELLGARDT AWIKSTROM A. A single polarized triangular grid tapered- slot array antenna[j]. IEEE Transactions on Antennas and Propagation 2009 579 2599-2607. [2] GUINVARC'H RHAUPT R L. Connecting spirals for wideband dual polarization phased array[j]. IEEE Transactions on Antennas and Propagation20115912 metamaterial antennas based on degenerate band edge and magnetic photonic crystals[j]. IEEE Proceedings 2011 9910 1732-1745. 4534-4541. [10] ALWAN E A SERTEL K VOLAKIS J L. A simple equivalent [3] KINDT R W PICKLES W R. Ultrawideband all- metal circuit model for ultra- wideband coupled arrays[j]. flared- notch array radiator[j]. IEEE Transactions on Antennas and Propagation 2011 5912 4534-4541. [4] HOLL S S VOUVAKIS M N. The planar ultra-wideband modular antenna array[j]. IEEE Transactions on Antennas and Propagation 2012 601 130-140. [5] HOLL S S SCHAUBERT D H VOUVAKIS M N. A 7-21GHz dual-polarized planar ultra-wideband modular antenna array[j]. IEEE Transactions on Antennas and Propagation 2012 6010 4589-4599. [6] MUNK B A. Finite antenna arrays and FSS[M]. New York Wiley 2003 181-213. [7] MUNK B A TAYLOR T DURHAM W et al. A low-profile broadband phased array antenna[c]//proceedings of 2003 448-451. [8] TZANIDIS I SERTEL K VOLAKIS J L. Interwoven spiral array with a 10 1 bandwidth on a ground plane[j]. IEEE Antennas and Wireless Propagation Letters 2011 101 115-118. [9] VOLAKIS J L SERTEL K. Narrowband and wideband IEEE Antennas and Wireless Propagation Letters 2011 117 117-120. [11] TZANIDIS I SERTEL K VOLAKIS J L. Characteristic excitation taper for ultrawideband tightly coupled antenna arrays[j]. IEEE Transactions on Antennas and Propagation 2012 5811 1777-1784. [12] MOULDER W FSERTEL KVOLAKIS J L. Superstrate- enhanced ultrawideband tightly coupled array with resistive FSS[J]. IEEE Transactions on Antennas and Propagation 2012 609 4166-4172. [13] CHEN Y YANG S NIE Z. A novel wideband antenna array with tightly coupled octagonal ring elements[j]. Progress In Electromagnetics Research 2012 12411 55-70. Design of a Novel Ultra-Wideband Tightly Coupled Antenna Array ZHANG Jun 1, 2, HU Zhi-hui 1, QU Hong-dong 2 1. Department of Electronic and Information Engineering, NAAU, Yantai Shandong 264001, China; 2. Army Aviation Academy, Beijing 100123, China Abstract: The impedance bandwidth of tightly coupled array (TCA) is greatly effected by the ground plane when it is in stalled on the platform of airplanes, missiles and naval ships. In view of this question, a novel ultra-wideband TCA with multilayer structure was designed by grid resistance frequency selective surface and interdigital dipole antenna. The perfor mance of TCA with and without grid RFSS was compared by CST, the simulated result showed that the effect of ground plane was greatly restricted by loading a grid RFSS, the impedance bandwidth (VSWR<2) of TCA with grid RFSS was 10.4 1 (1.8~18.8 GHz), while without grid RFSS the best bandwidth was 4.5 1 (2.1~9.5 GHz). Key words: tightly coupled array; ultra-wideband; resistive frequency selective surface; dipole antenna; multilayer struc ture
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