作者机构：
College of Physical Science and Technology, Central China Normal University, Wuhan, China;Science and Technology on Electromagnetic Compatibility Laboratory, China Ship Development and Desig
会议名称：
2011 cross Strait Quad-Regional Radio Science and Wireless Technology Conference(CSQRWC 2011)(2011年海峡两岸四地无线电科技研讨会)
会议时间：
2011-07-26
会议地点：
哈尔滨
会议论文集名称：
2011 cross Strait Quad-Regional Radio Science and Wireless Technology Conference(CSQRWC 2011)(2011年海峡两岸四地无线电科技研讨会)论文集
摘要：
Based on the physical optics (PO) and the principle of impedance boundary condition ( IBC ) with LeftHanded Materials, a numerical method is described to analyze the near-field EM scattering from targets coated with medium. For typical targets such as a metal plate covered with radar absorbing materials (RAM) in far field and a missile coated with RAM having Left-Handed Materials in near field, the EM scattering values are obtained and discussed.
期刊：
2011 4th IEEE International Symposium on Microwave, Antenna, Propagation and EMC Technologies for Wireless Communications,2011年:57-60
作者机构：
[Nan Wu] Science and Technology on Electromagnetic Compatibility Laboratory, China Ship Development and Design Center, Wuhan, China;[Qiang Hu; Hai Lin; He-lin Yang] College of Physical science and Technology, Central China Normal University, Wuhan, China
摘要：
In this paper, we present a novel slotted structure which will be etched on the patch of new microstrip patch antenna, and ground plane with crossed strip-line gaps is also used in our novel slotted patch antenna, unlike conventional microstrip patch antenna. The simulated results show that the bandwidth of slotted antenna is 13 times wider than the original microstrip antenna. Moreover, magnetic field distribution of slotted microstrip antenna is much more uniform than that of original microstrip antenna, as a result, the slotted antenna has better radiation characteristic. In addition, the 50 Ω matching is reached at the resonant frequency, therefore additional matching networks are not needed.
期刊：
Journal of Magnetism and Magnetic Materials,2011年323(5):607-610 ISSN：0304-8853
通讯作者：
Yang, He-Lin
作者机构：
[Li, Min-Hua; Yang, He-Lin] Cent China Normal Univ, Coll Phys Sci & Technol, Wuhan 430079, Peoples R China.;[Tian, Yan] Huazhong Univ Sci & Technol, Elect & Informat Engn Dept, Wuhan 430074, Peoples R China.;[Hou, Dong-Yun] China Ship Dev & Design Ctr, Sci & Technol Electromagnet Compatibil Lab, Wuhan 430064, Peoples R China.
通讯机构：
[Yang, He-Lin] C;Cent China Normal Univ, Coll Phys Sci & Technol, Wuhan 430079, Peoples R China.
关键词：
Left-handed material;Metamaterial;Negative refractive index
摘要：
A kind of planar left-handed metamaterial (LHM) with unique configurations is demonstrated, which offers an approach in building dual-band negative-index materials. Simulated and experimental results predict two left-handed transmission bands near 11.1 and 14.6 GHz. Dual bands of negative refractive indexes are verified using the retrieval procedure. Field and current distribution at the dual magnetic resonance are also examined. The effective electromagnetic parameters show that by carefully adjusting dimensions of the unit cell, electric and magnetic resonances can be coexistent at some frequency ranges with both negative permittivity and negative permeability. The idea can help us designing planar negative-index materials with multibands.
摘要：
We present a new design for metamaterial (MM) absorber that is resonant with strong absorbance in the microwave frequency range. Our fabricated MM consists of two resonators and a metal wire that couple separately so as to absorb all incident electric and magnetic fields within a single-unit cell layer. Experiments demonstrated that the transmission coefficients (S21) are lower than -10 dB across the entire measurement frequency range, and the reflectance coefficients (S11) are about -20 dB around 10.4 GHz. The absorptivity. which can be obtained through S parameter, is greater than 98% around 10.4 GHz in experiments and 99.9% in simulations. (C) 2010 Wiley Periodicals, Inc. Microwave Opt Technol Lett 52: 877-880. 2010 Published online in Wiley InterScience (www.interscience.wiley.com). DOI:10.1002/mop.25068
摘要：
We present a design for metamaterial absorber which is resonant with strong absorbance in the microwave frequency range. Our fabricated design consists of two resonators and a metal wire that couple separately so as to absorb all incident electric and magnetic fields within a single planar layer which is only 0.9 mm thick. Experiments demonstrate that the transmission coefficients (S21) are lower than −10 dB across the entire measurement frequency range and the reflectance coefficients (S11) are about −20 dB around 10.4 GHz. The absorptivity which can be obtained through S parameters is greater than 98% around 10.4 GHz in experiments and 99.9% in simulations.
期刊：
2010 International Conference on Microwave and Millimeter Wave Technology,2010年:129-131
作者机构：
[He-lin Yang; Ting Xiao; Yong-zhi Cheng; Min-hua Li; Guo-ping Zhang] College of Physical Science and Technology, Huazhong Normal University, Wuhan, China;[Bo-xun Xiao] College of Geophysics and Petroleum Resources, Yangtze University, Jingzhou, Hubei, China
摘要：
The electromagnetic scattering of conductor plate coated with multilayer medium is investigated based on the physical optics (PO) theory and the principle of equivalent impedance boundary condition (IBC). Compared with the multilayered plate coated with right-handed medium, the radar cross section (RCS) of plate composed of metamaterial and right-handed medium has a reduction of 5.76dBsm in the mirror direction. It shows that metamaterials can become a candidate of the radar absorbing material (RAM), which offers a new idea for the development of stealth technology.
作者机构：
College of Physical Science and Technology, Huazhong Normal University, Wuhan Hubei 430079, China
会议名称：
第九届国际天线、电波传播及电磁理论学术研讨会(ISAPE2010)
会议时间：
2010-11-29
会议地点：
广州
会议论文集名称：
第九届国际天线、电波传播及电磁理论学术研讨会(ISAPE2010)论文集
摘要：
Based on the method of physical optics (PO) and the method of ray tracing (RT), we analyzed the near-field primary scattering of the panels, the near-field secondary scattering between the facets, the near-field composite scattering between facets and rough sea surface. Simultaneously, we calculated the near-field and far-field scattering versus incident angles by a dihedral made of two orthogonal plates and a ship model, respectively, and then discussed the characteristics of the near-field and far-field scattering. The near-field composite scattering between the ship model and sinusoidal composed surface were calculated and analyzed.
作者：
Li, M. H.;Yang, H. -L.*;Hou, X. -W.;Tian, Y.;Hou, D. -Y.
期刊：
Progress in Electromagnetics Research (P IE R),2010年108:37-49 ISSN：1070-4698
通讯作者：
Yang, H. -L.
作者机构：
[Hou, X. -W.; Li, M. H.; Yang, H. -L.] Huazhong Normal Univ, Coll Phys Sci & Technol, Wuhan 430079, Peoples R China.;[Tian, Y.] Huazhong Univ Sci & Technol, Elect & Informat Engn Dept, Wuhan 430074, Peoples R China.;[Hou, D. -Y.] China Ship Ind Corp, Res & Dev Inst 701, Natl Key Lab EMC, Wuhan 430064, Peoples R China.
通讯机构：
[Yang, H. -L.] H;Huazhong Normal Univ, Coll Phys Sci & Technol, Wuhan 430079, Peoples R China.
摘要：
In this paper, we present the design, simulation, and measurement of a dual-band metameterial absorber in the microwave region. Simulated and experimental results show that the absorber has two perfect absorption points near 11.15 GHz and 16.01 GHz. Absorption under different polarizations of incident EM waves are measured with magnitude of over 97% at low-frequency peak and 99% at high-frequency peak respectively. Current distribution at the dual absorptive peaks is also given to study the physical mechanism of power loss. Moreover, it is verified by experiment that the absorpiton of this kind of metamaterial absorber remain over 90% at the low-frequency peak and 92% at the high-frequency peak with wide incident angles ranging from 0 degrees to 60 degrees for both transverse electric wave and transverse magnetic wave.
期刊：
Microwave and Optical Technology Letters,2009年51(8):1865-1868 ISSN：0895-2477
通讯作者：
Li, Minhua
作者机构：
[Yang, Helin; Li, Minhua] Huazhong Normal Univ, Coll Phys Sci & Technol, Wuhan 430079, Peoples R China.;[Wen, Ding-e] Natl Key Lab EMC, Wuhan 430079, Peoples R China.
通讯机构：
[Li, Minhua] H;Huazhong Normal Univ, Coll Phys Sci & Technol, Wuhan 430079, Peoples R China.
关键词：
metamaterials;left‐handed material;split ring resonator (SRR);plasma frequency;negative magnetic permeability
摘要：
Free-space microwave measurements are applied on composite metamaterials (CMMs) consisting of split ring resonators (SRRs) and wires, also known as left-handed material. Our experiments are based on a type of CMMs with unique configurations and the transmission and reflection measurements performed in free space exhibit a pass band at about 9 GHz. Simulation results are also given, which are in good agreements with experiments. The widely belief of the pass band is that the stop hands of the SRRs alone and the wires alone constitute a clear demonstration of left-handed (LH) behavior. The LH behavior only take place in the medium with simultaneously negative permittivity epsilon, and permeability mu, also called double negative materials. (C) 2009 Wiley Periodicals, Inc. Microwave Opt Technol Lett 51: 1865-1868. 2009; Published online in Wiley InterScience (www.interscience.wiley.com) DOI 10.1002/mop.24465
