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2022 IEEE 9th International Symposium on Microwave, Antenna, Propagation and EMC Technologies for Wireless Communications (MAPE)最新文献

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RF Front-End Electrically Tunable Null-Forming Circuit Based on Reflective-Type Phase Shifter 基于反射式移相器的射频前端电可调谐零形成电路
Yueru Guo, Ji-bin Liu, Mingtuan Lin, Jian Shen
In this paper, a radio frequency front-end electrically tunable null-forming circuit has been presented. The circuit is composed of quadrature couplers and tunable phase shifters. A quadrature branch-line coupler and a low insertion loss reflective-type phase shifter with a full 360°phase shift range at 6 GHz are simulated as the critical components of the circuit. Finally, an 8-element circuit is simulated at 6 GHz to verify the proposed circuit. The results show that the circuit can successfully construct a tunable null in a full field-of-view with dc bias voltage changing when it is applied to an 8-element uniform linear array. For the best performance element, the depth of the null reaches 24 dB.
本文提出了一种射频前端电可调谐零形成电路。该电路由正交耦合器和可调谐移相器组成。对该电路的关键元件进行了正交支路耦合器和低插入损耗反射型移相器的仿真,该移相器在6ghz下具有360°的全移相范围。最后,对6 GHz频率下的8元电路进行了仿真验证。结果表明,该电路应用于8元均匀线性阵列时,可以在直流偏置电压变化的全视场范围内成功地构建可调谐零。对于性能最好的元件,空的深度达到24 dB。
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引用次数: 0
An Efficient 3D Radar Imaging Algorithm Based on FISTA 一种基于FISTA的高效三维雷达成像算法
Xiuhe Li, Jinhe Ran, Zichen Zhou
Existing 3D millimeter-wave (MMW) imaging algorithms are limited to the Nyquist sampling criterion so obtaining high-resolution 3D echo data requires a high cost. The conventional compressed sensing (CS) method requires a large-scale measurement matrix and immense computation. To overcome these problems, we propose an efficient 3D radar imaging algorithm based on the fast iterative shrinkage-thresholding algorithm (FISTA). The range-azimuth decoupling method is adopted to simply 3D reconstruction. The Single-Frequency Holographic Imaging algorithm is embedded into the iteration steps of FISTA, which effectively avoids large-scale matrix operations. Experimental results have demonstrated the effectiveness of the proposed SFH-FISTA in comparison with traditional 3D MMW imaging algorithms.
现有的三维毫米波成像算法仅限于奈奎斯特采样准则,因此获得高分辨率的三维回波数据需要很高的成本。传统的压缩感知(CS)方法需要大规模的测量矩阵和巨大的计算量。为了克服这些问题,我们提出了一种基于快速迭代收缩阈值算法(FISTA)的高效三维雷达成像算法。采用距离-方位解耦方法进行简单的三维重建。将单频全息成像算法嵌入到FISTA迭代步骤中,有效避免了大规模矩阵运算。实验结果表明,与传统的三维毫米波成像算法相比,SFH-FISTA算法是有效的。
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引用次数: 1
A Generalizing Radiation Pattern Synthesis Method for Conformal Antenna Array Based on Convolutional Neural Network 基于卷积神经网络的共形天线阵广义辐射方向图综合方法
Shiyuan Zhang, Chen Wang, Da Huang, Haobo Han, M. Bai
With the increasing complexity of antenna array layouts, the efficient methods for synthesizing the radiation patterns of conformal antenna arrays have been the challenge. In this paper, a generalized method based on convolution neural network is proposed to synthesize the radiation patterns of conformal antenna arrays. Furthermore, the Taylor-based aperture projection method is used to generate the training samples and training labels are designed as some two-channel data matrices. Simulation experiments have been designed with a conformal antenna array, of which the radiation patterns of training set and test set are successfully synthesized. The results show that the trained network has high efficiency and good generalization effect for synthesizing the radiation patterns of conformal antenna array.
随着天线阵布局的日益复杂,有效地合成共形天线阵辐射方向图的方法已成为一个挑战。本文提出了一种基于卷积神经网络的广义共形天线阵辐射方向图综合方法。在此基础上,采用基于泰勒孔径投影法生成训练样本,并将训练标签设计为双通道数据矩阵。设计了共形天线阵的仿真实验,成功地合成了训练集和测试集的辐射方向图。结果表明,训练后的网络对共形天线阵辐射方向图的合成具有较高的效率和良好的泛化效果。
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引用次数: 1
Triple-Link Fusion Decision Method for Through-the-Wall Radar Human Motion Recognition 穿墙雷达人体运动识别的三链路融合决策方法
Weicheng Gao, Xiaopeng Yang, T. Lan, X. Qu, Junbo Gong
To better solve the accuracy degradation of human motion recognition due to low signal-to-clutter-plus-noise ratio (SCNR) and low resolution of through-the-wall radar (TWR) imaging, a triple-link fusion decision human motion recognition method for through-the-wall radar is proposed in this paper. This method combines the physical information, visual local information and visual global information in imaging. Specifically, the idea of complementarity of three weak models, including empirical modal decomposition (EMD) algorithm based on statistic signal detection, visual gradient-level based kernel method and visual regionalized macro-level based shuffle attention improved residual neural network (SA-Inception-ResNet) algorithm are introduced in the method, and the Dempster-Shafer (D-S) synthesis theory is used to achieve decision level fusion recognition. The final results are inferred by an adaptive boosting method on the trained weak models and the fused strong model. Experiments are carried out to demonstrate that the accuracy of the algorithm exceeds 99.54%, while the prediction performance and robustness are significantly improved compared with previous methods.
为了更好地解决穿墙雷达成像低信噪比(SCNR)和低分辨率对人体运动识别精度的影响,本文提出了一种三链路融合决策穿墙雷达人体运动识别方法。该方法结合了成像中的物理信息、视觉局部信息和视觉全局信息。具体而言,该方法引入了基于统计信号检测的经验模态分解(EMD)算法、基于视觉梯度级的核方法和基于视觉区域宏观级的洗牌注意改进残差神经网络(sa - incept - resnet)算法三种弱模型的互补思想,并利用Dempster-Shafer (D-S)综合理论实现决策级融合识别。通过对训练好的弱模型和融合的强模型进行自适应增强,推导出最终结果。实验结果表明,该算法的准确率超过99.54%,预测性能和鲁棒性均较以往方法有显著提高。
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引用次数: 0
Design and Implementation of Broadband Cermet Package Low Noise Amplifier 宽带金属陶瓷封装低噪声放大器的设计与实现
M. Xue, Zhi‐bin Zeng, Zanqing Jiang, Xing Liu, Yu Zhao, Chunliang Xu
Based on the GaAs pHEMT monolithic process and miniaturized cermet packaging process, a high-integration, wide-band, cermet package low noise amplifier (LNA) is successfully implemented. In the 10 GHz ~20 GHz band, the port standing wave is less than 1.5, the gain is more than 15 dB, the noise figure is less than 2.8 dB, and the package size is only 4.0 mm*4.0 mm*1.2 mm. The research and development of broadband cermet package LNA will push the receiver to realize higher integration, smaller array area, and improve its frequency utilization and anti-interference ability.
基于GaAs pHEMT单片工艺和微型化金属陶瓷封装工艺,成功实现了一种高集成度、宽带、金属陶瓷封装低噪声放大器(LNA)。在10ghz ~ 20ghz频段,端口驻波小于1.5,增益大于15db,噪声系数小于2.8 dB,封装尺寸仅为4.0 mm*4.0 mm*1.2 mm。宽带金属陶瓷封装LNA的研究与发展将推动接收机实现更高的集成度、更小的阵列面积,提高其频率利用率和抗干扰能力。
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引用次数: 0
EMI Reduction in Multilayer PCBs Using Planar Interdigital Slot Structures on the Reference Planes 利用参考平面上的平面数字间槽结构降低多层pcb中的电磁干扰
L. K. Baghel, Seyit Ahmet Sis, Fatih Üstüner, Sumanth S Kumar
In mixed-signal circuits, the return currents of sensitive analog and noisy digital signals must be carefully isolated in order to protect the integrity of the analog signals. To address this issue, a common approach is to utilize slots on the reference plane between digital and analog circuits. However, the slots so created cause the discontinuity in the return current path for a signal passing over these slots which causes unintentional radiation and results in unwanted electromagnetic interference (EMI). In this regard, we propose the planar interdigital slot structures for use in reference planes of multilayer PCBs in order to provide a low impedance path for return current. The interdigital structure alleviates the return current path discontinuity and hence reduces the unintentional radiation. In addition to this, a relationship between radiated emission and transmission response is obtained, allowing the designer to tune the slot parameters to minimize radiation at the signal frequency. PCBs with different size planar interdigital slot structures are simulated in Ansys HFSS and is found that the longer digit length corresponds to better EMI reduction, especially at higher frequencies.
在混合信号电路中,为了保护模拟信号的完整性,必须仔细隔离敏感的模拟信号和有噪声的数字信号的返回电流。为了解决这个问题,一种常见的方法是利用数字和模拟电路之间的参考平面上的插槽。然而,这样创建的插槽导致通过这些插槽的信号的返回电流路径不连续,从而导致无意的辐射并导致不必要的电磁干扰(EMI)。在这方面,我们提出了平面数字间槽结构,用于多层pcb的参考平面,以提供低阻抗路径的返回电流。数字间结构减轻了返回电流路径的不连续,从而减少了非故意辐射。除此之外,还获得了辐射发射与传输响应之间的关系,使设计人员能够调整槽参数,以最小化信号频率处的辐射。在Ansys HFSS中对不同尺寸平面数字间槽结构的pcb进行了仿真,发现数字长度越长,对EMI的抑制效果越好,特别是在高频下。
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引用次数: 2
Design of Concurrent Multiband Matching Networks for Low Noise Amplifiers in Multiband Radios 多波段无线电低噪声放大器多频带并行匹配网络设计
A. Aneja, Xue Li
This paper presents the design and implementation of concurrent multiband impedance matching networks (MBIMNs) for low noise amplifiers (LNAs). The designed MBIMNs were implemented using microstrip lines on FR-4 and Roger’s 5880 substrates. The designed dual band IMN (DBIMN) operates at 900 MHz and 2.0 GHz. The |S11| for DBIMN circuit are -20dB and-23dB at 900 MHz and 2.0 GHz, respectively. For the designed triband IMN (TBIMN), the three bands are centered at 900 MHz, 2.4 GHz and 3.2 GHz and the measured |S11| are -44.6dB, -14.7dB and -33.9 dB, respectively. The proposed technique can be implemented to design MBIMNs at other frequencies.
本文介绍了一种用于低噪声放大器的并发多频带阻抗匹配网络的设计与实现。设计的MBIMNs采用微带线在FR-4和Roger 's 5880基板上实现。设计的双频IMN (DBIMN)工作在900 MHz和2.0 GHz。DBIMN电路的S11在900 MHz和2.0 GHz时分别为-20dB和- 23db。设计的三带IMN (timn)以900 MHz、2.4 GHz和3.2 GHz为中心,测量的S11|分别为-44.6dB、-14.7dB和-33.9 dB。该技术可应用于其它频率的MBIMNs设计。
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引用次数: 0
Experimental Investigation on Microwave Switch Matrix System for Real-time Microwave Tomography Imaging Applications 微波开关矩阵系统在实时微波断层成像中的应用实验研究
H. Tong, Feng Gao, Cenjie Yuan, Zhongwen Jin, Bing Tian, Haoyu Tian
To realize the real-time microwave tomography systems, three different 2×16 switch matrix systems, using solid-state microwave switching chips and coplanar waveguide (CPW) structures, are designed, constructed and tested. The first switch matrix system consists of two single pole 4 throw (SP4T) switch units and four 2×4 switching matrix units. The second one possesses the compact structure for the application of portable microwave tomography systems. The last one is consisted of two 1×2 switch units and two 2×8 switching matrix units. The insertion losses of these switch matrix systems are within the range of -5dB and the isolations are around -42dB when frequency is under 1GHz.
为了实现实时微波层析成像系统,采用固态微波开关芯片和共面波导(CPW)结构,设计、构建和测试了三种不同的2×16开关矩阵系统。第一个开关矩阵系统由两个单极掷(SP4T)开关单元和四个2×4开关矩阵单元组成。第二种结构紧凑,适用于便携式微波层析成像系统。最后一个由两个1×2开关单元和两个2×8开关矩阵单元组成。当频率低于1GHz时,这些开关矩阵系统的插入损耗在-5dB范围内,隔离度在-42dB左右。
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引用次数: 1
Compact Omnidirectional MIMO Antenna for Wi-Fi and 5G Application 用于Wi-Fi和5G应用的紧凑型全向MIMO天线
Li Jing-Han, Hu Yu-Lu
In this paper, a compact omnidirectional multiband MIMO antenna is proposed and investigated. Bending the branch of PIFA achieves the miniaturization, and etching a L-shaped slit on the ground extends the working band. The -10dB return loss bandwidth covers two Wi-Fi frequency bands (2400~2800 MHz, 5300~5800 MHz) and 5G communication band (3800~4400 MHz). The central rotatable method is applied to form a four-port MIMO structure. The results show that the antenna achieves a good diversity performance by the polarization diversity. The proposed antenna has a small size of 30 × 30 × 0. 8 mm3, with 360° omnidirectional patterns, promising for the practical applications.
本文提出并研究了一种紧凑的全向多频带MIMO天线。弯曲PIFA分支实现了微型化,在地面蚀刻l型狭缝延长了工作频带。-10dB回波损耗带宽覆盖两个Wi-Fi频段(2400~2800 MHz, 5300~5800 MHz)和5G通信频段(3800~4400 MHz)。采用中心可旋转方法形成四端口MIMO结构。结果表明,该天线通过极化分集实现了良好的分集性能。该天线尺寸较小,为30 × 30 × 0。8mm3,具有360°全向图案,具有实际应用前景。
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引用次数: 0
Behavioral Model Extraction for Low Noise Amplifier 低噪声放大器的行为模型提取
Yunlong Li, Jing Gong, Chengcheng Xie, Guiyuan Li, Jun Xing, Chang Deng, Hongliu Liu, Yong Zhou
Behavioral model is an effective tool to design nonlinear radio frequency and microwave circuits. Using accurate behavioral model, engineers can greatly reduce circuit development time by eliminating the need to build expensive and time-consuming hardware prototypes. At present, noise modeling of low noise amplifiers (LNA) mainly focuses on equivalent model, while relatively little research has been done on behavioral model. Therefore, this paper will study the behavioral model of the the LNA. It includes the theoretical derivation of the noise parameter testing process of the LNA, the extraction and the verification of the behavioral model of the LNA in simulation.
行为模型是设计非线性射频和微波电路的有效工具。使用准确的行为模型,工程师可以通过消除构建昂贵且耗时的硬件原型的需要,大大减少电路开发时间。目前,低噪声放大器的噪声建模主要集中在等效模型上,而对行为模型的研究相对较少。因此,本文将对LNA的行为模型进行研究。包括LNA噪声参数测试过程的理论推导、LNA行为模型的提取和仿真验证。
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引用次数: 1
期刊
2022 IEEE 9th International Symposium on Microwave, Antenna, Propagation and EMC Technologies for Wireless Communications (MAPE)
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