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2018 International Conference on Microwave and Millimeter Wave Technology (ICMMT)最新文献

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A Wideband and Circularly Polarized Wide-Angle Scanning Phased Array with Substrate-Integrated Cavity-Backed Patches 一种基片集成腔背贴片宽带圆极化广角扫描相控阵
Pub Date : 2018-05-07 DOI: 10.1109/ICMMT.2018.8563707
Xiao-Lin Zhang, S. Xiao, Chunmei Liu, Zhangjing Wang, J. Deng, Xiaovu Bai
A wideband and circularly polarized (CP) substrate integrated cavity-backed patch antenna is proposed. This antenna has a wide-beam radiation pattern. The half power beam-width (HPBW) is 154° and the axial ratio (AR) below 5.8dB is more than 229° in both $mathbf{phi}=pmb{0^{circ}}$ and $mathbf{phi}=pmb{90^{circ}}$ planes, which has a large potential for CP wide-angle scanning phased array. The impedance bandwidth with SII $< pmb{-10}mathbf{dB}$ is more than 23%. An $pmb{8 X 8}$ planar phased array based on the antenna element is designed. The simulated results show that the main beam can scan from -60° to + 60° with 3dB gain fluctuation and from -80° to + 80° with 6.5dB gain fluctuation. Meanwhile, the AR is smaller than 3dB within the scanning range from -60° to + 60°, and smaller than 6dB within scanning range from -80° to + 80°.
提出了一种宽带圆极化基片集成腔背贴片天线。这个天线有宽波束辐射方向图。$mathbf{phi}=pmb{0^{circ}}$和$mathbf{phi}=pmb{90^{circ}}$两个平面的半功率波束宽度(HPBW)为154°,5.8dB以下的轴向比(AR)均大于229°,具有较大的CP广角扫描相控阵应用潜力。SII $< pmb{-10}mathbf{dB}$时阻抗带宽大于23%。设计了基于天线单元的$pmb{8 X 8}$平面相控阵。仿真结果表明,主波束扫描范围为-60°~ + 60°,增益波动为3dB;扫描范围为-80°~ + 80°,增益波动为6.5dB。同时,在-60°~ + 60°的扫描范围内,AR小于3dB,在-80°~ + 80°的扫描范围内,AR小于6dB。
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引用次数: 2
An Optically Transparent Broadband Microwave Absorber Based on Resistive Frequency Selective Surface 基于电阻频率选择表面的光透明宽带微波吸收体
Pub Date : 2018-05-07 DOI: 10.1109/ICMMT.2018.8563797
X. Xie, Fei-fei Li, W. Fang, D. Fan, Ruixin Wu, Ping Chen
An optically transparent broadband RFSS absorber, with wide incident angle range was demonstrated based on ITO films. Equivalent TLM and full-wave electromagnetic simulation were used to analyze and optimize the absorber. The experimental results agree well with calculated ones. Specifically, the bandwidths of absorptivity $geq 80%$ under incident angle 45° are over 9GHz for both TE and TM polarization, respectively.
介绍了一种基于ITO薄膜的宽入射角范围的光纤透明RFSS吸收体。利用等效TLM和全波电磁仿真对吸波器进行了分析和优化。实验结果与计算结果吻合较好。具体来说,在45°入射角下,TE极化和TM极化的吸光率$geq 80%$带宽分别大于9GHz。
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引用次数: 2
A Novel C/Ku Dual-Band Dual-Polarized Shared Aperture Antenna for SAR Applications 一种新型C/Ku双频双极化共享孔径天线
Pub Date : 2018-05-07 DOI: 10.1109/ICMMT.2018.8563356
Jiachen Xu, B. Lan, Chenjiang Guo, Jun Ding
In this paper, with the use of dielectric resonator antennas (DRA), a novel C/Ku band dual liner polarized shared aperture subarray is designed for SAR applications. Cross placed dual polarized printed dipoles are used for C band and several techniques is implemented for broaden the bandwidth. Ku band is consist of 4 hybrid fed, “pair-wise, anti-phase” placed dual polarized DRAs for better isolation and low cross polarization. Simulation data show that good bandwidth, polarization-isolation and radiation performance are got, and this subarray is able to be scaled to a larger radiating aperture.
本文利用介质谐振器天线(DRA),设计了一种新型的C/Ku波段双线性极化共享孔径子阵列。C波段采用交叉放置的双极化印刷偶极子,并采用了几种技术来扩大带宽。Ku波段由4个杂化馈电、“成对反相”放置的双极化dra组成,以获得更好的隔离和低交叉极化。仿真数据表明,该子阵列具有良好的带宽、极化隔离性能和辐射性能,能够适应更大的辐射孔径。
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引用次数: 2
Fast Design of Polarization Independent Metasurfaces for Shaping Electromagnetic Waves 用于电磁波整形的非极化超表面的快速设计
Pub Date : 2018-05-07 DOI: 10.1109/ICMMT.2018.8563614
S. Sui, Hua Ma, Jie-qiu Zhang, Jiafu Wang, Zhuo Xu, S. Qu
The metasurfaces have recently been demonstrated to provide full control of the phase responses of electromagnetic (EM) wave scattering over subwavelength scales, enabling a wide range of practical applications. Here, a method for fast design of polarization-independent metasurfaces is proposed. A nonlinear fitting scenarios is employed to precisely predict reflective phase response of the metasurface. To obtain the optimal performance, nonlinear fitting scheme and genetic algorithm are combined. Since low-Q-factor resonant able to introduce wideband and smooth phase response, combining with lossless substrate, the metasurface with high reflective amplitude and wideband corresponding phase response can be obtained. As verify, two types metasurface examples characterized of coding metasurface on RCS reduction and reflective focusing lens are demonstrated.
超表面最近被证明可以完全控制亚波长尺度上电磁波散射的相位响应,从而实现广泛的实际应用。本文提出了一种与偏振无关的超表面的快速设计方法。采用非线性拟合场景精确预测了超表面的反射相位响应。为了获得最优的性能,将非线性拟合方案与遗传算法相结合。由于低q因子谐振能够引入宽带平滑相位响应,结合无损衬底,可以获得具有高反射幅度和宽带对应相位响应的超表面。作为验证,展示了两种类型的元表面,其特征是在RCS还原和反射聚焦透镜上编码元表面。
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引用次数: 0
Tolerance on Power Amplifier Characteristics for the Linearization of Massive MIMO Systems 大规模MIMO系统线性化的功放特性公差
Pub Date : 2018-05-07 DOI: 10.1109/ICMMT.2018.8563858
Jianxin Jing, Jialin Cai, Chao Yu
In this paper, the tolerance of power amplifier's (PA) characteristics is investigated for a shared digital predistortion (DPD) solution for massive multiple-input multiple-output (MIMO) systems. By modeling different behaviors, the range of model coefficients can be employed to indicate the similarity of PAs and calculated by adding an offset to the least-squares objective function. Simulation results of a 16-path transmitter with 16 similar PAs are presented, which show that these PAs can be linearized by only one share DPD and the adjacent channel leakage ratio (ACLR) for all branches can meet the specific spectrum requirement, that is, -45 dBc.
针对大规模多输入多输出(MIMO)系统的共享数字预失真(DPD)方案,研究了功率放大器(PA)特性的容限问题。通过建模不同的行为,模型系数的范围可以用来表示pa的相似性,并通过在最小二乘目标函数中添加偏移量来计算。给出了一个16路发射机的仿真结果,结果表明,这些pa只需一个共享DPD就可以线性化,并且所有支路的相邻通道泄漏比(ACLR)可以满足特定的频谱要求,即-45 dBc。
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引用次数: 1
A 700 MHz-920 MHz CMOS Power Amplifier for LTE Applications 用于LTE应用的700 MHz-920 MHz CMOS功率放大器
Pub Date : 2018-05-07 DOI: 10.1109/ICMMT.2018.8563705
Zhengdong Jiang, Dong Chen, Youxi Zhou, Zhiqing Liu, Chenxi Zhao, K. Kang
This work presents a CMOS power amplifier (PA) for FDD (band 17, 18, 19 and 20) of 4G cellular applications. In this work, a power cell by using three stacked transistors is proposed. It not only meets the breakdown voltage requirement, but also provides enough power gain and output power. By designing the compact and low-loss layout of the power cell, the power added efficiency (PAE) is increased observably. It is fabricated in 180-nm CMOS with a chip area of $1800 mu mathrm{m} times 1500 mu mathrm{m}$. The proposed PA achieves a power gain of 37 dB, saturated output power $(mathbf{P}_{mathbf{s}mathbf{a}mathbf{t}})$ of 32 dBm, output 1 dB compression point $(mathbf{OP}_{mathbf{l}mathbf{d}mathbf{B}})$ of 30.5 dBm and peak PAE of 41.50/0 at 810 MHz.
这项工作提出了一种用于4G蜂窝应用的FDD(频段17,18,19和20)的CMOS功率放大器(PA)。本文提出了一种由三个堆叠晶体管组成的能量电池。既满足击穿电压要求,又能提供足够的功率增益和输出功率。通过设计紧凑、低损耗的电池布局,可以明显提高电池的功率附加效率。它采用180纳米CMOS制造,芯片面积为$1800 mu mathm {m}乘以$ 1500 mu mathm {m}$。该放大器的功率增益为37 dB,饱和输出功率$(mathbf{P}_{mathbf{s}mathbf{a}mathbf{t}})$为32 dBm,输出1 dB压缩点$(mathbf{OP}_{mathbf{l}mathbf{d}mathbf{B}})$为30.5 dBm,在810 MHz时峰值PAE为41.5 /0。
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引用次数: 1
A Metallic 3D Printed 20 GHz Unit Cell for Satellite Communications 用于卫星通信的金属3D打印20ghz单元电池
Pub Date : 2018-05-07 DOI: 10.1109/ICMMT.2018.8563435
Bing Zhang, Li Wu, Yong-xin Guo
We present a 3D printed metallic K-band (18-26.5 GHz) passive frontend for satellite communication. Taking the advantage of the 3D printing technology in realizing complex structures, we achieve a highly-integrated passive module. Good agreement is achieved between simulation and measurement. The proposed frontend has impedance bandwidth 19 - 21 GHz, the maximum gain of 15.5 dBi at 21 GHz, and desirable radiation patterns on both E- and H-planes. Compared with traditionally fabricated metallic microwave passive devices, the proposed work has a shorter turn-around time and a lower cost. Compared with dielectric 3D printed microwave devices, it features more simplicity in terms of process and better physical robustness. It opens up new possibilities for microwave device fabrication.
我们提出了一个用于卫星通信的3D打印金属k波段(18-26.5 GHz)无源前端。利用3D打印技术实现复杂结构的优势,我们实现了一个高度集成的无源模块。仿真结果与实测结果吻合较好。所提出的前端具有19 - 21 GHz的阻抗带宽,在21 GHz时的最大增益为15.5 dBi,并且在E和h平面上都具有理想的辐射方向图。与传统制作的金属微波无源器件相比,该工作具有更短的周期和更低的成本。与介质3D打印微波器件相比,其工艺更简单,物理稳健性更好。它为微波器件制造开辟了新的可能性。
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引用次数: 1
Load-Pull-Based OIP3 Optimization Method for VHF Band CMOS Power Amplifier Design 基于负载-拉的VHF波段CMOS功率放大器OIP3优化设计方法
Pub Date : 2018-05-07 DOI: 10.1109/ICMMT.2018.8563609
Jialin Cai, Chao Yu, Lingling Sun, Jun Liu, Jiangtao Su
A load-pull based method was used to achieve the best load matching impedance for a VHF band complementary metal oxide semiconductor (CMOS) power amplifier (PA). With the employ of the new technique, PA designers can not only target the load impedance area which provides the maximum output power, but also can maintain the PA with the best output third-order interception point (OIP3). Both schematic and post-layout simulations are provided to validate the effectiveness of the new technique.
针对VHF波段互补金属氧化物半导体(CMOS)功率放大器,提出了一种基于负载-拉的最佳负载匹配阻抗方法。利用该技术,放大器设计人员不仅可以针对提供最大输出功率的负载阻抗区域,而且可以保持最佳输出三阶拦截点(OIP3)。通过原理图和布局后仿真验证了该方法的有效性。
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引用次数: 0
A Perfect Absorber Based on Monolayer MoS2 and Nano-Silver in the Visible Regime 基于单层二硫化钼和纳米银的可见光吸收材料
Pub Date : 2018-05-07 DOI: 10.1109/ICMMT.2018.8563880
Wenbing Chen, Lei Wang, Yannan Jiang, Jiao Wang
The monolayer MoS2 offer wide band gap and has great potential in energy storage, sensor, photonics. In this paper, we design and simulate a perfect absorber based on the local surface plasmon resonance and the coupling properties between the Ag pattern and the monolayer MoS2. The absorption value is almost 100% at peak, and the bandwidth of the absorption greater than 90% can reach 20THz. It is also polarization independent due to the fourfold rotational structural symmetry. The absorption value still remains over 90% when the incident angle increases to 60 degrees. The absorber has a great potential in many applications such as photodetectors, solar cell, sensors.
单层二硫化钼具有较宽的带隙,在储能、传感器、光子学等方面具有很大的潜力。在本文中,我们设计并模拟了一个基于局部表面等离子体共振和银图案与单层二硫化钼之间耦合特性的完美吸收体。峰值吸收值几乎为100%,吸收大于90%的带宽可达20THz。由于四重旋转结构对称,它也是与极化无关的。当入射角增加到60°时,吸收值仍保持在90%以上。该吸收剂在光电探测器、太阳能电池、传感器等领域具有很大的应用潜力。
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引用次数: 4
Broadband Polarization Conversion Metasurface for Radar Cross Section Reduction 用于雷达截面减小的宽带偏振转换超表面
Pub Date : 2018-05-07 DOI: 10.1109/ICMMT.2018.8563649
Weikang Chen, Jianfeng Shi, Z. Niu, C. Gu
In this work, a novel broadband polarization conversion metasurface (PCM) with high polarization conversion ratio is presented for radar cross section (RCS) reduction. The reflection phase difference of the PCM unit cell and its mirror is about 180°in a broad frequency band. Based on the phase cancellation and diffuse reflection theory, a broadband RCS reduction is achieved by designing the layout of the unit cells of the metasurface. The simulation results show that the proposed metasurface can significantly reduce the RCS more than 10 dB from 7 GHz to 20 GHz (i.e., fractional bandwidth 96.3%) comparing with the same size bare metal plate. The proposed metasurface with low profile and simple structure shows great potential applications in stealth technology.
本文提出了一种新型的高偏振转换比宽带偏振转换超表面(PCM),用于减小雷达横截面(RCS)。在较宽的频带内,PCM单元电池与其镜面的反射相位差约为180°。基于相位抵消和漫反射理论,通过设计超表面单元格的布局,实现了宽带RCS的降低。仿真结果表明,与相同尺寸的裸金属板相比,所提出的超表面可将7 GHz至20 GHz的RCS显著降低10 dB以上(即分数带宽降低96.3%)。所提出的超表面具有低轮廓、结构简单等特点,在隐身技术中具有很大的应用潜力。
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引用次数: 1
期刊
2018 International Conference on Microwave and Millimeter Wave Technology (ICMMT)
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