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2022 Photonics & Electromagnetics Research Symposium (PIERS)最新文献

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Dielectric-supported Rhombus-shaped Meander-line Slow-wave Structure for a V-band Dual-sheet Beam Traveling Wave Tube 介质支撑的v波段双片束行波管菱形弯曲线慢波结构
Pub Date : 2022-04-25 DOI: 10.1109/piers55526.2022.9793127
Yuxin Wang, Yang Dong, Shaomeng Wang, Y. Gong
A novel dual-beam rhombus-shaped meander line slow wave structure (DS-RSML SWS) is proposed in this paper, which is suitable for low-voltage operation and device miniaturization. The planar SWS is supported by two dielectric rods from both sides, making it suitable for dual-beam operation. The high frequency and transmission characteristics of the SWS are investigated. The input-output couplers connect the SWS with the standard waveguide by adopting step waveguide. The backward-wave oscillation is effectively suppressed by negative pitch tapering. Particle-in-cell (PIC) simulation results show that the output power of the rhombus-shaped SWS can reach 83 W at 58 GHz, under the conditions of a dual-sheet beam (7.7kV, 0.1 A) and input power of 0.1 W, with gain and electron efficiency of 29 dB and 10.8%, respectively.
提出了一种适用于低压工作和器件小型化的新型双波束菱形曲线形慢波结构(DS-RSML SWS)。平面SWS由两侧的两个介质棒支撑,使其适合双光束工作。研究了SWS的高频特性和传输特性。输入输出耦合器采用阶跃波导将SWS与标准波导连接起来。负节距变细有效地抑制了后波振荡。粒子池(PIC)仿真结果表明,在双片波束(7.7kV, 0.1 a)和输入功率为0.1 W的条件下,菱形SWS在58 GHz时的输出功率可达83 W,增益和电子效率分别为29 dB和10.8%。
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引用次数: 0
Development of High-Q Sensor for NQR Detection of Dangerous Materials 用于危险物质NQR检测的高q传感器研制
Pub Date : 2022-04-25 DOI: 10.1109/piers55526.2022.9793064
S. Mamadazizov, N. G. Calicioglu, Rian Ryzhov, G. Mozzhukhin, B. Rameev
Nuclear Quadrupole Resonance (NQR) is a conventional technique for solid sample investigation. However,one of the main disadvantages of NQR is the low signal-to-noise ratio at low frequencies. This could be resolved by designing high sensitive coils. The goal of the current work is to develop an RF probe with a high quality factor. Thus, a finite element modelingsimulation of several planar RF coil configurations using the CST Studio package was made.
核四极共振(NQR)是固体样品研究的常规技术。然而,NQR的主要缺点之一是在低频时信噪比低。这可以通过设计高灵敏度线圈来解决。当前工作的目标是开发具有高质量因子的射频探头。因此,使用CST Studio软件包对几种平面射频线圈配置进行了有限元建模仿真。
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引用次数: 0
Offshore Electromagnetic Wave Propagation Loss Model Based on Ray Tracing Method 基于光线追踪法的近海电磁波传播损耗模型
Pub Date : 2022-04-25 DOI: 10.1109/piers55526.2022.9793142
Zhenjia Chen, Lihui Wang, Ran Chen
Wireless communication technology supports the safe implementation of maritime operations. The offshore electromagnetic wave propagation loss model is of great significance to the study of offshore wireless communication channels. The process of electromagnetic wave propagation on the sea can be expressed as a double-path model. Based on the ray tracing method, electromagnetic waves are regarded as numerous rays propagating from the source point. The rays are affected by the curvature of the earth and the refractive index of the air and will bend when propagating in the air. Rays incident on the rough sea surface will be reflected and absorbed. According to the wind speed and wind direction parameters, combined with the stochastic process method, the rough sea surface geometric model can be estimated. According to the salinity and temperature of the sea surface, the reflection coefficient and absorption coefficient of the rays can be determined. According to the tilt angle attitude of the transmitting antenna and the antenna pattern, the initial energy of the rays of different radiation directions can be determined. Offshore electromagnetic wave propagation loss model based on ray tracing method, research on receiving ball size design and offshore electromagnetic spectrum sensing method. The offshore electromagnetic wave propagation loss model proposed in this paper is based on the antenna attitude and rough sea surface model, which can more accurately describe the state of the offshore environment. Computational electromagnetics methods can effectively improve the estimation accuracy of the spatial distribution of offshore electromagnetic spectrum. According to the judgment of the rough sea surface geometric model and the position of the signal source to quickly estimate the effective ray, the ray tracing method is optimized and accelerated, and the speed of the model calculation is improved. Based on the ray tracing method and the rough sea surface model, an offshore electromagnetic wave propagation loss model is established. Combined with the auxiliary parameters of the sensor environment, it effectively describes the influence of the dynamic sea surface on the propagation of radio signals.
无线通信技术支持海上作业的安全实施。海上电磁波传播损耗模型对研究海上无线通信信道具有重要意义。电磁波在海面上的传播过程可以用双路径模型来表示。基于射线追踪法,电磁波被看作是从源点传播的无数条射线。光线受到地球曲率和空气折射率的影响,在空气中传播时会发生弯曲。入射到波涛汹涌的海面上的光线会被反射和吸收。根据风速和风向参数,结合随机过程方法,可以估计出粗糙海面的几何模型。根据海水表面的盐度和温度,可以确定光线的反射系数和吸收系数。根据发射天线的倾斜角度姿态和天线方向图,可以确定不同辐射方向射线的初始能量。基于射线追踪法的海上电磁波传播损耗模型,研究接收球尺寸设计和海上电磁频谱感知方法。本文提出的近海电磁波传播损耗模型基于天线姿态和粗糙海面模型,能更准确地描述近海环境的状态。计算电磁学方法可以有效地提高近海电磁波谱空间分布的估计精度。根据粗糙海面几何模型的判断和信号源位置快速估计有效射线,优化和加速了射线追踪方法,提高了模型计算速度。基于射线追踪法和粗糙海面模型,建立了近海电磁波传播损耗模型。结合传感器环境的辅助参数,有效地描述了动态海面对无线电信号传播的影响。
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引用次数: 0
High-resolution Automotive Radar Point Cloud Imaging and Processing 高分辨率汽车雷达点云成像与处理
Pub Date : 2022-04-25 DOI: 10.1109/piers55526.2022.9792662
Meng Jiang, Gang Xu, Haonan Pei, Hui Zhang, Kunpeng Guo
Automotive radar is a class of important and necessary sensor for Advanced Driver Assistance System (ADAS) due to its recognized advantages of small size, low hardware cost, all-weather working, high-resolution and etc. However, the limitation of low angular resolution with low imaging performance can hardly satisfy the need of next-stage ADAS. The emerging 4D imaging radar (4D-radar), adopting the multi-chip cascaded multiple-input multiple-output (MIMO) technology, can achieve high resolution in the azimuth and elevation dimensions with providing high-quality three-dimensional point clouds images. In this paper, a novel algorithm is proposed by integrating the high-resolution MIMO radar point clouds imaging and processing. First, we have symmetrically studied the MIMO radar technologies, classing into three main modes, TDM-MIMO, Phase coding MIMO, DDM-MIMO. In particular, we have designed a mixed TDM-DDM-MIMO framework for point clouds imaging. Finally, the experimental analysis of the simulation is provided to confirm the effectiveness of the proposal.
汽车雷达具有体积小、硬件成本低、全天候工作、高分辨率等公认的优点,是高级驾驶辅助系统(ADAS)必不可少的一类重要传感器。然而,低角度分辨率和低成像性能的限制很难满足下一阶段ADAS的需要。新兴的四维成像雷达(4D-radar)采用多芯片级联多输入多输出(MIMO)技术,可以在方位角和仰角尺寸上实现高分辨率,提供高质量的三维点云图像。本文提出了一种集成高分辨率MIMO雷达点云成像与处理的新算法。首先,我们对称地研究了MIMO雷达技术,将其分为三种主要模式:TDM-MIMO,相位编码MIMO, DDM-MIMO。特别地,我们设计了一个用于点云成像的混合TDM-DDM-MIMO框架。最后进行了仿真实验分析,验证了该方法的有效性。
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引用次数: 1
A Wideband High Gain Taper Slot Antenna for 5G Millimeter-wave Imaging System Application 5G毫米波成像系统中的宽带高增益锥形缝隙天线
Pub Date : 2022-04-25 DOI: 10.1109/piers55526.2022.9792932
Yao Zhang, K. Huang, Li Gao
This paper presents a wideband coplanar waveguide (CPW) feed taper slot antenna. A microstrip-line-to-slot transition structure is used to excite the slot radiator. Wideband performance is realized by the aperiodic continuously scaled structure. The fabricated antenna prototype features a compact size of 61 × 25 × 0.16 mm3. Measurement results show this antenna achieves better than 10 dB return loss within an ultra-wideband (10–40 GHz). The measured peak gain within this band ranges from 6 to 12.5 dBi. The wideband characteristic makes this antenna attractive in 5G wideband phased-array beamformer and wideband imaging system applications.
提出了一种宽带共面波导馈电锥形缝隙天线。采用微带-线-槽过渡结构激励槽辐射器。宽带性能是通过非周期连续缩放结构实现的。制作的天线原型具有61 × 25 × 0.16 mm3的紧凑尺寸。测量结果表明,该天线在超宽带(10 - 40 GHz)范围内的回波损耗优于10 dB。在该波段测量的峰值增益范围为6 ~ 12.5 dBi。宽带特性使该天线在5G宽带相控阵波束形成器和宽带成像系统应用中具有吸引力。
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引用次数: 0
A Gravity Tailored Ultra-broadband Absorber Based on High-impedance Surface 基于高阻抗表面的重力定制超宽带吸收器
Pub Date : 2022-04-25 DOI: 10.1109/piers55526.2022.9792833
Haozhe Zhang, Hao Pan, Hai‐feng Zhang
We design a three-dimensional ultra-broadband tunable metamaterial absorber tailed by the gravity field (GF) with changing the position of the liquid metal in theory. The ultra-broadband absorption is achieved by the high-impedance surface and the liquid metal. Furthermore, the tuning absorption can be implemented by virtue of the liquid metal pouring into the different parts of the glass cavities under GF regulation. When such an absorber is not rotated, for the TE wave, the absorption rate exceeds 90% at 1.8–57.5GHz with a wide relative absorption bandwidth of 187.8%. yet for the TM wave, the absorptivity goes beyond 90% from 5.6 GHz to 56.4 GHz. The presented absorber exhibits ultra-broadband absorption at 1.6–45.3GHz (the absorptivity is higher than 90%) with this absorber rotated 180° in the x-y plane for the TE and TM waves. While the absorptivity is near to null at 1.6 60 GHz with the devised absorber rotated 180° in the y-z plane. Besides, the simulations show that this absorber can realize the high absorption upon a wider incident angle.
从理论上设计了一种以重力场为尾的三维超宽带可调谐超材料吸收体,改变了液态金属的位置。超宽带吸收是通过高阻抗表面和液态金属实现的。此外,在GF调节下,液态金属注入玻璃腔的不同部位可以实现调谐吸收。当该吸收体不旋转时,对于TE波,1.8-57.5GHz的吸收率超过90%,相对吸收带宽为187.8%。而对于TM波,在5.6 GHz ~ 56.4 GHz范围内,吸收率超过90%。该吸收体在x-y平面上旋转180°,对TE和TM波具有1.6 ~ 45.3 ghz的超宽带吸收(吸收率高于90%)。当设计的吸收器在y-z平面旋转180°时,在1.6 60 GHz处吸收率接近于零。仿真结果表明,该吸收体在较宽的入射角下可以实现较高的吸收。
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引用次数: 0
PIERS 2022 Committees 2022年码头委员会
Pub Date : 2022-04-25 DOI: 10.1109/piers55526.2022.9792671
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引用次数: 0
Wavelength-tunable Q-switched Mode-locked Multimode Fiber Laser 波长可调调q锁模多模光纤激光器
Pub Date : 2022-04-25 DOI: 10.1109/piers55526.2022.9793046
Jia-Wen Wu, Guangyu Liu, Z. Luo, Wen-Cheng Xu, A. Luo
A graphene-deposited multimode microfiber is used for generating Q-switched mode-locked (QML) pulses in multimode fiber laser. Due to the multimode interference filtering effect, the wavelength-tunable QML operation is achieved.
在多模光纤激光器中,采用石墨烯沉积的多模微光纤产生调q锁模脉冲。利用多模干涉滤波效应,实现了波长可调的QML操作。
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引用次数: 0
Wideband Schiffman Phase Shifters Designed with Deep Neural Networks 基于深度神经网络的宽带希夫曼移相器设计
Pub Date : 2022-04-25 DOI: 10.1109/piers55526.2022.9792858
S. An, B. Zheng, H. Tang, H. Li, L. Zhou, Y. Dong, M. Haerinia, Houyu Zhang
Phase shifters play an important role in beam scanning phased arrays, modulators and communication systems. Ideal phase shifters should provide flat phase shift over wide operating frequency band with low insertion and return loss. Schiffman phase shifters are compact in size, easy to fabricate using Print Circuit Board (PCB) technology, while still provide accurate phase shift in relatively wide bandwidth (usually $gt 50$%), making them stand out from various wideband phase shifter designs. However, due to the approximations being used during the design and the unquantifiable influences of the chamfered entries, fringing effects and parasite inductances of the narrow links between coupled lines, it's hard to analytically calculate the electromagnetic (EM) response of a Schiffman phase shifter given the dimensions. As a result, time-consuming fine-tuning is still required during the design process. In this paper, a novel DNN approach is introduced for the fast inverse design of wideband Schiffman phase shifters. For the first time, a predicting neural network that is capable of simultaneously modeling the phase shift, insertion loss and return loss of Schiffman phase shifter structures over a relative wide spectrum (133%) has been demonstrated. Based on the highly accurate forward predicting network, a tandem inverse design network was also constructed for the fast inverse designs of Schiffman phase shifter with arbitrary phase shift and bandwidth targets. Different from traditional design approaches, the well-trained inverse design network generates design parameters in milliseconds, with no further EM simulation needed. Several Schiffman phase shifters with 60% and 40% fractional bandwidth were designed, fabricated and tested to verify the efficacy of the proposed approach. This DNN-enabled method validates the feasibility of on-demand wideband phase shifter designs, which can be easily generalized to other EM problems, including but not limited to antenna design, microwave circuit design and EM compatibility problems.
移相器在波束扫描相控阵、调制器和通信系统中起着重要的作用。理想的移相器应该在较宽的工作频带内提供平坦的移相,并且具有较低的插入损耗和回波损耗。希夫曼移相器尺寸紧凑,易于使用印刷电路板(PCB)技术制造,同时仍然在相对较宽的带宽(通常为50 %)下提供准确的相移,使其从各种宽带移相器设计中脱颖而出。然而,由于在设计过程中使用了近似方法,并且耦合线之间窄链路的倒角入口、边缘效应和寄生电感的影响无法量化,因此在给定尺寸的情况下,很难解析计算希夫曼移相器的电磁响应。因此,在设计过程中仍然需要进行耗时的微调。本文提出了一种基于深度神经网络的宽带希夫曼移相器快速反设计方法。该研究首次证明了一种预测神经网络能够在相对宽的频谱(133%)范围内同时对希夫曼移相器结构的相移、插入损耗和回波损耗进行建模。在高精度正演预测网络的基础上,构建了具有任意相移和带宽目标的希夫曼移相器串联反设计网络,实现了希夫曼移相器快速反设计。与传统的设计方法不同,训练有素的反设计网络在毫秒内生成设计参数,无需进一步的电磁仿真。设计、制作和测试了几种分数带宽分别为60%和40%的希夫曼移相器,以验证该方法的有效性。这种支持dnn的方法验证了按需宽带移相器设计的可行性,可以很容易地推广到其他电磁问题,包括但不限于天线设计、微波电路设计和电磁兼容问题。
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引用次数: 1
Single Cell Optical Manipulation and Molecular Detection 单细胞光学操作和分子检测
Pub Date : 2022-04-25 DOI: 10.1109/piers55526.2022.9792592
Hongbao Xin, Baojun Li
Single cell manipulation and molecular detection is of great importance for single cell analysis and biopsy at subcellular or single molecule level. In this talk, I will share our recent work on single cell optical manipulation and detection. Single bacteria detection and single cell surgery will first be discussed based on optical trapping. Indirect manipulation and actuation will then be presented via optical force-controlled bio-micromotor. Finally, I’ll talk about enzyme detection and quantum electron transfer detection in living cells via single plasmonic nanoantenna.
单细胞操作和分子检测对于亚细胞或单分子水平的单细胞分析和活检具有重要意义。在这次演讲中,我将分享我们最近在单细胞光学操作和检测方面的工作。单细菌检测和单细胞手术将首先讨论基于光学捕获。间接操纵和驱动将通过光学力控制的生物微电机。最后,我将讨论单等离子体纳米天线在活细胞中的酶检测和量子电子转移检测。
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引用次数: 0
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2022 Photonics & Electromagnetics Research Symposium (PIERS)
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