A Miniaturized Antenna with Negative Index Metamaterial Based on Modified SRR and CLS Unit Cell for UWB Microwave Imaging Applications

A miniaturized antenna employing a negative index metamaterial with modified split-ring resonator (SRR) and capacitance-loaded strip (CLS) unit cells is presented for Ultra wideband (UWB) microwave imaging applications. Four left-handed (LH) metamaterial (MTM) unit cells are located along one axis of the antenna as the radiating element. Each left-handed metamaterial unit cell combines a modified split-ring resonator (SRR) with a capacitance-loaded strip (CLS) to obtain a design architecture that simultaneously exhibits both negative permittivity and negative permeability, which ensures a stable negative refractive index to improve the antenna performance for microwave imaging. The antenna structure, with dimension of 16 × 21 × 1.6 mm3, is printed on a low dielectric FR4 material with a slotted ground plane and a microstrip feed. The measured reflection coefficient demonstrates that this antenna attains 114.5% bandwidth covering the frequency band of 3.4–12.5 GHz for a voltage standing wave ratio of less than 2 with a maximum gain of 5.16 dBi at 10.15 GHz. There is a stable harmony between the simulated and measured results that indicate improved nearly omni-directional radiation characteristics within the operational frequency band. The stable surface current distribution, negative refractive index characteristic, considerable gain and radiation properties make this proposed negative index metamaterial antenna optimal for UWB microwave imaging applications.

[1]  Zhuo Xu,et al.  Broadband planar left-handed metamaterials using split-ring resonator pairs , 2009 .

[2]  Mohammad Tariqul Islam,et al.  DESIGN OF A COMPACT ULTRAWIDEBAND META- MATERIAL ANTENNA BASED ON THE MODIFIED SPLIT-RING RESONATOR AND CAPACITIVELY LOADED STRIPS UNIT CELL , 2013 .

[3]  Thelaha Masri,et al.  Microstrip Antenna's Gain Enhancement Using Left-Handed Metamaterial Structure , 2009 .

[4]  S Crozier,et al.  Strain Imaging of the Breast by Compression Microwave Imaging , 2010, IEEE Antennas and Wireless Propagation Letters.

[5]  Raed A. Abd-Alhameed,et al.  Microstrip Antenna for Microwave Imaging Application , 2011 .

[6]  Karu P. Esselle,et al.  Analysis of spiral metamaterials by use of group theory , 2009 .

[7]  X. Li,et al.  Confocal microwave imaging for breast cancer detection: localization of tumors in three dimensions , 2002, IEEE Transactions on Biomedical Engineering.

[8]  Lei Zhang,et al.  Experimental demonstration of negative index of refraction , 2006 .

[9]  Qiang Cheng,et al.  Electric and magnetic responses from metamaterial unit cells at terahertz , 2008, 2008 International Workshop on Metamaterials.

[10]  Raja Syamsul Azmir Raja Abdullah,et al.  Miniaturized Ultra-Wideband Antenna Using Microstrip Negative Index Metamaterial , 2011 .

[11]  R. Shelby,et al.  Experimental Verification of a Negative Index of Refraction , 2001, Science.

[12]  Xiaopeng Zhao,et al.  Low losses left-handed materials with optimized electric and magnetic resonance , 2010 .

[13]  Fernando L. Teixeira,et al.  Electrically small, complementary electric-field-coupled resonator antennas , 2013 .

[14]  Richard W. Ziolkowski,et al.  A High-Directivity, Wideband, Efficient, Electrically Small Antenna System , 2014, IEEE Transactions on Antennas and Propagation.

[15]  陈志宁,et al.  Broad-bandwidth and low-loss metamaterials： theory, design and realization , 2006 .

[16]  Jin Au Kong,et al.  Robust method to retrieve the constitutive effective parameters of metamaterials. , 2004, Physical review. E, Statistical, nonlinear, and soft matter physics.

[17]  Ekmel Ozbay,et al.  A planar metamaterial: Polarization independent fishnet structure , 2008 .

[18]  Willie J Padilla,et al.  Composite medium with simultaneously negative permeability and permittivity , 2000, Physical review letters.

[19]  G. Eleftheriades,et al.  Planar negative refractive index media using periodically L-C loaded transmission lines , 2002 .

[20]  Maryam Ravan,et al.  Near-Field Microwave Imaging Based on Aperture Raster Scanning With TEM Horn Antennas , 2011, IEEE Transactions on Antennas and Propagation.

[21]  Hua Ma,et al.  A Tunable Left-Handed Metamaterial Based on Modified Broadside-Coupled Split-Ring Resonators , 2009 .

[22]  M. Popovic,et al.  Spectral Difference Between Microwave Radar and Microwave-Induced Thermoacoustic Signals , 2009, IEEE Antennas and Wireless Propagation Letters.

[23]  Jiang Zhu,et al.  A Compact Transmission-Line Metamaterial Antenna With Extended Bandwidth , 2009, IEEE Antennas and Wireless Propagation Letters.

[24]  Milica Popovic,et al.  A Novel Ultra-Compact Broadband Antenna for Microwave Breast Tumor Detection , 2008 .

[25]  V. Veselago.  The Electrodynamics of Substances with Simultaneously Negative Values of ∊ and μ , 1968 .

[26]  R. Scapaticci,et al.  Wavelet-Based Adaptive Multiresolution Inversion for Quantitative Microwave Imaging of Breast Tissues , 2012, IEEE Transactions on Antennas and Propagation.

[27]  S. Noghanian,et al.  A diamond shaped small planar ultra wide band (UWB) antenna for microwave Imaging Purpose , 2007, 2007 IEEE Antennas and Propagation Society International Symposium.

[28]  H. Henke,et al.  Broadband Microstrip Antenna With Left-Handed Metamaterials , 2009, IEEE Transactions on Antennas and Propagation.

[29]  M. Popovic,et al.  Miniaturized microstrip-fed "Dark Eyes" antenna for near-field microwave sensing , 2005, IEEE Antennas and Wireless Propagation Letters.

[30]  Amin M. Abbosh,et al.  Directive Antenna for Ultrawideband Medical Imaging Systems , 2008 .

[31]  Guangyou Fang,et al.  Design and measurement of compact tapered slot antenna for UWB microwave imaging radar , 2009, 2009 9th International Conference on Electronic Measurement & Instruments.

[32]  Gonul Turhan-Sayan,et al.  COMPARATIVE INVESTIGATION OF RESONANCE CHARACTERISTICS AND ELECTRICAL SIZE OF THE DOUBLE-SIDED SRR, BC-SRR AND CONVENTIONAL SRR TYPE METAMATERIALS FOR VARYING SUBSTRATE PARAMETERS , 2009 .

[33]  J. Pendry,et al.  Magnetism from conductors and enhanced nonlinear phenomena , 1999 .

[34]  David R. Smith,et al.  Electromagnetic parameter retrieval from inhomogeneous metamaterials. , 2005, Physical review. E, Statistical, nonlinear, and soft matter physics.

[35]  Jianhua Cui,et al.  Metamaterial composed of wire pairs exhibiting dual band negative refraction , 2010 .

[36]  Nasser Ojaroudi,et al.  UWB/Omni-Directional Microstrip Monopole Antenna for Microwave Imaging Applications , 2014 .