作者：
Ye, Qi-wei*;Nie, Yan;Gong, Rongzhou;Xiao, Boxun;Yang, Helin
作者机构：
[Yang, Helin; Ye, Qi-wei] Cent China Normal Univ, Coll Phys Sci & Technol, Wuhan 430079, Hubei, Peoples R China.;[Nie, Yan; Gong, Rongzhou] Huazhong Univ Sci & Technol, Sch Optic & Elect Informat, Wuhan 430074, Peoples R China.;[Xiao, Boxun] Yangtze Univ, Engn Geophys Res Ctr, Wuhan 434023, Peoples R China.
会议名称：
10th International Symposium on Antennas, Propagation and EM Theory (ISAPE)
会议时间：
OCT 22-26, 2012
会议地点：
Xi'an, PEOPLES R CHINA
会议主办单位：
[Ye, Qi-wei;Yang, Helin] Cent China Normal Univ, Coll Phys Sci & Technol, Wuhan 430079, Hubei, Peoples R China.^[Nie, Yan;Gong, Rongzhou] Huazhong Univ Sci & Technol, Sch Optic & Elect Informat, Wuhan 430074, Peoples R China.^[Xiao, Boxun] Yangtze Univ, Engn Geophys Res Ctr, Wuhan 434023, Peoples R China.
摘要：
A new metamaterial polarization transformer is designed in our paper, which is a sandwich structure. There are three metal layers and two dielectric layers in it. The top and bottom layer is SRR structure, and the middle layer is a metal cross-shape structure. We give the simulated results of this model. It reaches a near-complete cross polarization conversion at 11.03 GHz, and the polarization conversion ratio is 96.6%. Then the internal physical mechanism is analyzed through the current and electric field distribution figures. The enantiomeric pattern and sandwich coupling structure help us to manipulate the electromagnetic wave polarizations. In addition, we load the lumped elements on the gaps of SRRs to control the polarization characteristic. And we find the impact of resistor is very big. Using this feature, we can manipulate the electromagnetic wave polarizations more flexibly.
作者机构：
[Xiao, Boxun] Yangtze Univ, Engn Geophys Res Ctr, Jinzhou 434023, Hubei, Peoples R China.;[Yang, Helin; Li, Minhua; Guo, Linyan] Cent China Normal Univ, Coll Phys Sci & Technol, Wuhan 430079, Hunan, Peoples R China.
会议名称：
10th International Symposium on Antennas, Propagation and EM Theory (ISAPE)
会议时间：
OCT 22-26, 2012
会议地点：
Xi'an, PEOPLES R CHINA
会议主办单位：
[Xiao, Boxun] Yangtze Univ, Engn Geophys Res Ctr, Jinzhou 434023, Hubei, Peoples R China.^[Guo, Linyan;Li, Minhua;Yang, Helin] Cent China Normal Univ, Coll Phys Sci & Technol, Wuhan 430079, Hunan, Peoples R China.
摘要：
There are many kinds of antennas used in UWB system. Double-side printed bow-tie antenna is one of them which has the advantages of light weight, planar structure, low cost and broad bandwidth. In this paper, a double-side printed bow-tie antenna used in UHF band is proposed first. Then a metal reflection plane is added on the back of this antenna to increase its gain and inhibit backward radiation. Return loss of -10dB or better is located in the band of 0.95-2.7 GHz and the relative bandwidth is 95.9%. They have the similar VSWR quality. Besides, the reflection plane has a strong influence on radiation pattern and antenna gain. Gain in dB of former antenna has been raised from around 2.5dB to 7.5dB due to the metal reflection plane. Hence, it has a great prospect in the application of double-side printed bow-tie antenna with metal reflection plane.
期刊：
Proceedings of 2011 Cross Strait Quad-Regional Radio Science and Wireless Technology Conference, CSQRWC 2011,2011年1:234-237
通讯作者：
Ye, Q.-W.(emyang@mail.ccnu.edu.cn)
作者机构：
[Qi-wei Ye; Hai Lin; Xiao-qin Chen; He-lin Yang] College of Physical Science and Technology, Central China Normal University, Luo Yu Road No.152, Wuhan 430079, China
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
期刊：
Proceedings of 2011 Cross Strait Quad-Regional Radio Science and Wireless Technology Conference, CSQRWC 2011,2011年1:44-47
通讯作者：
Zhao, R.(emyang@mail.ccnu.edu.cn)
作者机构：
[Zhao, Ran; Yang, He-Lin] College of Physical Science and Technology, Central China Normal University, Wuhan, China;[Xie, Da-Gang; Wu, Nan] Science and Technology on Electromagnetic Compatibility Laboratory, China Ship Development and Design Center, Wuhan, China
关键词：
Negative Refraction;Negative Permeability;Metamaterial Structure;Microwave Frequency Range;Index Metamaterial
摘要：
A low losses broadband planar negative refractive index metamaterial based on split-ring resonator (SRR) pairs is proposed and investigated experimentally and numerically at microwave frequency range. The transmission spectra of the single-layer SRR pairs were measured, and exhibited left-handed (LH) transmission passband clearly. The metal-dielectric-metal structure exhibits strong magnetic and electric responses simultaneously, and leads to negative permeability and negative permittivity. To further verify the LH properties of planer structure metamaterials, effect media parameters were retrieved, a refraction phenomenon based on a wedge-shaped model and negative phase advance between consecutive numbers of layers were also demonstrated.
摘要：
The model of the polarization-insensitive metamaterial (MM) absorber composed of split cross-ring resonator (SCRR), cave-cross resonator (CCR) and dielectric substrate was proposed at microwave frequencies. Based on perfect impedance-matched ((z) over tilde(omega) = 1) to the free space, the single unit cell could achieve near-unity absorbance by properly assembling the sandwich structure. We have simulated and measured the reflectivity and transmission properties of a planar MM absorber with the thickness of 0.6 mm. The absorptivity of a single layer MM absorber achieve greater than 96% around 10.07 GHz in experiments and 98% in simulations for incident electromagnetic (EM) wave with different polarizations. (C) 2010 Elsevier B.V. All rights reserved.
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 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.
