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Low-Cost Low-Loss Tunable Dual-Band Filter Using Coupled Lines With Variable Coupling Coefficients 使用耦合系数可变的耦合线的低成本低损耗可调双频滤波器
IF 0.9 4区 工程技术 Q4 COMPUTER SCIENCE, INTERDISCIPLINARY APPLICATIONS Pub Date : 2024-09-26 DOI: 10.1155/2024/5668593
Wang Qunliang, Jiang Yanfeng, Wang Yanxiong

A novel low-loss tunable filter using its own coupled lines is proposed in the paper. The filter is based on a substrate-integrated suspended line (SISL) structure with two inner layers, fabricated on a low-cost FR4 substrate. The suspension line and the cavity are completely covered by copper. In the novel structure, the coupled line can be tuned and has a variable coupling coefficient. The performance of the dual-band filter can be flexibly tuned by using the coupled lines. The passband widths can be tuned independently with the range from 0.31 to 0.92 GHz. The center frequencies of the passbands can also be tuned independently, with the tuning range of 1.1 GHz. A low insertion loss of less than 0.54 dB is shown in the proposed filter. The proposed filter shows potential application in future tunable microwave circuit.

本文提出了一种利用自身耦合线的新型低损耗可调滤波器。该滤波器基于基板集成悬浮线(SISL)结构,有两个内层,制作在低成本的 FR4 基板上。悬浮线和空腔完全由铜覆盖。在这种新型结构中,耦合线可以调整,并具有可变的耦合系数。通过使用耦合线,可以灵活地调整双频滤波器的性能。通带宽度可在 0.31 至 0.92 GHz 范围内独立调整。通带的中心频率也可独立调整,调整范围为 1.1 GHz。该滤波器的插入损耗小于 0.54 dB。该滤波器有望应用于未来的可调谐微波电路。
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引用次数: 0
An Ultrathin Multiband Chiral Metasurface for Transmission and Asymmetric Absorption of Electromagnetic Waves 用于电磁波传输和非对称吸收的超薄多波段手性元表面
IF 0.9 4区 工程技术 Q4 COMPUTER SCIENCE, INTERDISCIPLINARY APPLICATIONS Pub Date : 2024-09-19 DOI: 10.1155/2024/2326362
Sayan Sarkar, Bhaskar Gupta

This article presents an ultrathin chiral metasurface which can exhibit multiband asymmetric absorption as well as symmetric transmission in a specific frequency band outside the absorption regions. Unlike most electromagnetic metasurface absorbers, the proposed structure does not have a continuous conducting sheet at the bottom which also allows it to act as a bandpass spatial filter. The metasurface has a substrate thickness of only λhigh/62.5 and λlow/34 at the highest and lowest operational free-space wavelengths, respectively. The transmission band is centered at 5.5 GHz, and the asymmetric absorption bands are centered at 3, 3.33, and 4.5 GHz, respectively. The operational bands can be tuned as per user requirements. The metasurface has an angular stability of 45° for both TE and TM incidence. It can be used for radar cross-section (RCS) reduction, electromagnetic shielding, and as a spatial bandpass filter.

本文介绍了一种超薄手性元表面,它可以在吸收区域之外的特定频段表现出多波段非对称吸收和对称传输。与大多数电磁元表面吸收器不同的是,所提出的结构底部没有连续的导电片,这也使其能够充当带通空间滤波器。在最高和最低工作自由空间波长处,元表面的衬底厚度分别只有 λhigh/62.5 和 λlow/34。传输带的中心频率为 5.5 千兆赫,非对称吸收带的中心频率分别为 3、3.33 和 4.5 千兆赫。这些工作频带可根据用户要求进行调整。元表面在 TE 和 TM 入射角下的角度稳定性均为 45°。它可用于减少雷达截面(RCS)、电磁屏蔽和空间带通滤波器。
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引用次数: 0
Resistor-Loaded Wideband Polarization Independent Absorber Using Tightly Coupled Dipole Structure 使用紧密耦合偶极子结构的电阻器负载型宽带偏振无关吸收器
IF 0.9 4区 工程技术 Q4 COMPUTER SCIENCE, INTERDISCIPLINARY APPLICATIONS Pub Date : 2024-09-05 DOI: 10.1155/2024/5321173
Jian Peng, Chao Li, Fei Cheng, Li Wu, Wei-wei Xu, Zhi-jie Liu

This article presents a resistor-loaded wideband absorber using a tightly coupled dipole structure. The conversional inherit wide bandwidth tightly coupled dipole which was used as an antenna is adopted as a unit cell. The port of the dipole is loaded with resistors to dissipate the microwave energy. The design principles of the absorber are given. An equivalent circuit model composed of an RLC resonant circuit is proposed to analyze the performance of the absorber. To demonstrate, a 288 mm × 288 mm absorber ranging from 1.96 to 8.08 GHz is fabricated and measured. The measured results agree well with the simulated ones which show that the absorber can work from 2 to 8.18 GHz with an absorption rate of more than 90%. Moreover, the proposed absorber is also insensitive to the polarization angle of the incident wave. When the incident angle changes from 0° to 45°, the absorption rate is nearly unchanged over the operating band.

本文介绍了一种采用紧耦合偶极子结构的电阻加载宽带吸收器。它采用了用作天线的转换继承宽带紧耦合偶极子作为单元单元。偶极子的端口装有电阻器以耗散微波能量。文中给出了吸收器的设计原理。提出了一个由 RLC 谐振电路组成的等效电路模型来分析吸收器的性能。为了进行演示,制作并测量了一个 288 mm × 288 mm 的吸收器,频率范围从 1.96 GHz 到 8.08 GHz。测量结果与模拟结果非常吻合,表明该吸收器可在 2 至 8.18 GHz 范围内工作,吸收率超过 90%。此外,所提出的吸收器对入射波的偏振角也不敏感。当入射角从 0° 变为 45° 时,吸收率在工作频带内几乎保持不变。
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引用次数: 0
A Novel Millimeter-Wave Radar Interference Suppression Method Based on VMD and VI-CFAR Algorithms 基于 VMD 和 VI-CFAR 算法的新型毫米波雷达干扰抑制方法
IF 0.9 4区 工程技术 Q4 COMPUTER SCIENCE, INTERDISCIPLINARY APPLICATIONS Pub Date : 2024-08-30 DOI: 10.1155/2024/2305711
Chao Lv, Xun Huang, Guozheng Li, Dongqi Liu

With the increasing use of millimeter-wave radar in automobiles, mutual interference between vehicle-mounted millimeter-wave radar systems is becoming increasingly serious. Mutual interference between vehicle-mounted millimeter-wave radars significantly reduces the accuracy of target parameter estimation and the reliability of target detection. In view of this, this study proposes an interference suppression method that combines the Variational Mode Decomposition (VMD) algorithm and Variation Index Constant False Alarm Rate (VI-CFAR). First, the method performs adaptive decomposition of the intermediate frequency (IF) signals of an interfered vehicle-mounted millimeter-wave radar by VMD in order to obtain several different intrinsic modal functions (IMFs). Then, the relevant IMFs containing target information are identified based on the spectrograms of each IMF, followed by signal reconstruction of the relevant IMFs using VI-CFAR. Finally, the relevant IMFs are superimposed to complete the signal reconstruction. In the case of simultaneous interference by several different interference radars, the results of simulation experiments show that the method can improve the Signal-to-Interference Ratio (SIR) of the target and increase the detection of the interfered target to a greater extent than the Adaptive Noise Cancellation (ANC), Empirical Modal Decomposition (EMD), and Iterative Zeroing methods. According to the SIR results of the simulation experiments, it can be seen that under the static interference of several slightly weak interference sources, the SIR of each target is improved by 8.1, 8.1, 5.8, and 7.9 dB, respectively, after suppressing the interference by the method, whereas in the dynamic cases of simultaneous interference of several strong interference sources and detection of several weak targets, the SIR of each target is improved by 4.6, 2.2, 7.9, and 6.8 dB, respectively. Therefore, the method has some performance advantages.

随着毫米波雷达在汽车中的应用越来越广泛,车载毫米波雷达系统之间的相互干扰也越来越严重。车载毫米波雷达之间的相互干扰会大大降低目标参数估计的准确性和目标探测的可靠性。有鉴于此,本研究提出了一种结合变异模式分解(VMD)算法和变异指数恒误报率(VI-CFAR)的干扰抑制方法。首先,该方法通过 VMD 对受干扰的车载毫米波雷达的中频(IF)信号进行自适应分解,以获得多个不同的本征模态函数(IMF)。然后,根据每个 IMF 的频谱图确定包含目标信息的相关 IMF,接着使用 VI-CFAR 对相关 IMF 进行信号重建。最后,将相关 IMF 叠加,完成信号重建。在同时受到几种不同干扰雷达干扰的情况下,模拟实验结果表明,与自适应噪声消除法(ANC)、经验模态分解法(EMD)和迭代归零法相比,该方法能在更大程度上改善目标的信噪比(SIR),提高受干扰目标的探测率。根据仿真实验的 SIR 结果可以看出,在几个稍弱干扰源的静态干扰下,用该方法抑制干扰后,每个目标的 SIR 分别提高了 8.1、8.1、5.8 和 7.9 dB;而在几个强干扰源同时干扰和检测几个弱目标的动态情况下,每个目标的 SIR 分别提高了 4.6、2.2、7.9 和 6.8 dB。因此,该方法具有一定的性能优势。
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引用次数: 0
Knowledge-Based Methodology of CPW-Fed Open Stub Loaded C-Shaped Microstrip Antenna by Surrogate-Based Modeling 基于知识的 CPW-Fed 开路存根负载 C 形微带天线代理建模方法
IF 0.9 4区 工程技术 Q4 COMPUTER SCIENCE, INTERDISCIPLINARY APPLICATIONS Pub Date : 2024-08-20 DOI: 10.1155/2024/6247693
Cem Gocen, Ismail Akdag, Tarlan Mahouti, Mehmet A. Belen, Merih Palandöken, Peyman Mahouti

Antenna systems with more complicated geometries have been created as a result of evolving technology and rising performance standards in the industry. The geometric complexity of modern antennas makes it difficult for circuit theory tools or parametric studies to produce adequate findings, making it difficult for designers to create the designs they want. Even though full-wave electromagnetic (EM) modeling tools are widely utilized today, they are computationally expensive for local optimization alone. In order to speed up the stages of the simulation-based design of high-performance systems, many strategies have been devised to solve and/or minimize this challenge. Thanks to their adaptability, affordable computing costs, and widespread usage, surrogate-based models have grown to be a well-known branch. Herein, an innovative knowledge-based methodology for building a coplanar waveguide (CPW)-fed antenna using surrogate models is presented. In this work, a knowledge-based methodology using surrogate modeling is applied as an advanced approach that combines domain-specific knowledge with surrogate models to optimize the performance of a microwave antenna in a computationally efficient manner. For this aim, firstly, a 3D-EM simulator is deployed to generate a dataset for a deep learning-based surrogate model. When compared to the conventional optimization approach using direct deployment of EM simulators which is around 47.2 h, the proposed surrogate model approach has an average cost reduction of over 50% which corresponds to a total computational time of 24.3 h. The collected results are compared to performance metrics for prototype antenna designs as well as simulated outcomes from EM simulators and counterpart works from the literature.

随着技术的不断发展和行业性能标准的不断提高,几何形状更加复杂的天线系统应运而生。现代天线的几何复杂性使得电路理论工具或参数研究难以得出充分的结论,从而使设计人员难以创建他们想要的设计。尽管目前全波电磁(EM)建模工具已得到广泛应用,但仅就局部优化而言,这些工具的计算成本非常昂贵。为了加快基于仿真的高性能系统设计阶段,人们设计了许多策略来解决和/或尽量减少这一难题。由于其适应性强、计算成本低廉、应用广泛,基于代理的模型已成为一个著名的分支。本文提出了一种基于知识的创新方法,利用代用模型构建共面波导(CPW)馈源天线。在这项工作中,使用代用模型的基于知识的方法被作为一种先进的方法加以应用,它将特定领域的知识与代用模型相结合,以计算效率高的方式优化微波天线的性能。为此,首先部署了三维电磁模拟器,为基于深度学习的代用模型生成数据集。收集的结果与原型天线设计的性能指标、电磁模拟器的模拟结果以及文献中的对应作品进行了比较。
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引用次数: 0
Circularly Polarized Sixteen-Port Flexible UWB MIMO Antenna Featuring Polarization Diversity for WBAN Applications 用于 WBAN 应用的具有极化分集功能的圆极化十六端口柔性 UWB MIMO 天线
IF 0.9 4区 工程技术 Q4 COMPUTER SCIENCE, INTERDISCIPLINARY APPLICATIONS Pub Date : 2024-08-10 DOI: 10.1155/2024/8442770
Shailesh, Garima Srivastava, Sachin Kumar, Arpan Desai, Bhawna Goyal, Abdulkarem H. M. Almawgani, Turki Alsuwian

A sixteen-port circularly polarized (CP) ultrawideband (UWB) multiple-input−multiple-output (MIMO) belt antenna is designed and developed for wireless body area network (WBAN) applications. The proposed antenna comprises sixteen modified octagon-like ring antenna elements with a common ground. These antenna elements are designed on leather material and can be worn as a belt. Each antenna element contains a microstrip line feed and a modified octagon-like open-ended ring radiator to generate circular polarization. The belt antenna provides an impedance bandwidth (S11 ≤ −10 dB) of 3.08–11 GHz (112.5%) and a 3 dB axial ratio bandwidth (ARBW) of 4.7–7.07 GHz (40.27%). The envelope correlation coefficient (ECC) amongst the resonating elements is <0.003. Additionally, the bending analysis and specific absorption rate (SAR) of the presented antenna are examined. The overall size of the belt antenna is 30 mm × 574 mm × 1 mm. The designed belt antenna is suitable for WBAN applications due to its leather material, good on-body performance, and nearly identical simulated and experimental results.

设计并开发了一种十六端口圆极化(CP)超宽带(UWB)多输入多输出(MIMO)腰带天线,用于无线体域网(WBAN)应用。拟议的天线由十六个改进的八角形环状天线元件组成,具有公共接地。这些天线元件设计在皮革材料上,可作为腰带佩戴。每个天线元件都包含一个微带线馈线和一个改进的八角形开口环形辐射器,以产生圆极化。腰带天线的阻抗带宽(S11 ≤ -10 dB)为 3.08-11 GHz(112.5%),3 dB 轴向比带宽(ARBW)为 4.7-7.07 GHz(40.27%)。谐振元件之间的包络相关系数(ECC)为 0.003。此外,还对所介绍天线的弯曲分析和比吸收率(SAR)进行了研究。腰带天线的整体尺寸为 30 mm × 574 mm × 1 mm。所设计的腰带天线采用皮革材料,具有良好的贴身性能,模拟结果与实验结果几乎完全一致,因此适用于 WBAN 应用。
{"title":"Circularly Polarized Sixteen-Port Flexible UWB MIMO Antenna Featuring Polarization Diversity for WBAN Applications","authors":"Shailesh,&nbsp;Garima Srivastava,&nbsp;Sachin Kumar,&nbsp;Arpan Desai,&nbsp;Bhawna Goyal,&nbsp;Abdulkarem H. M. Almawgani,&nbsp;Turki Alsuwian","doi":"10.1155/2024/8442770","DOIUrl":"https://doi.org/10.1155/2024/8442770","url":null,"abstract":"<p>A sixteen-port circularly polarized (CP) ultrawideband (UWB) multiple-input−multiple-output (MIMO) belt antenna is designed and developed for wireless body area network (WBAN) applications. The proposed antenna comprises sixteen modified octagon-like ring antenna elements with a common ground. These antenna elements are designed on leather material and can be worn as a belt. Each antenna element contains a microstrip line feed and a modified octagon-like open-ended ring radiator to generate circular polarization. The belt antenna provides an impedance bandwidth (<i>S</i><sub>11</sub> ≤ −10 dB) of 3.08–11 GHz (112.5%) and a 3 dB axial ratio bandwidth (ARBW) of 4.7–7.07 GHz (40.27%). The envelope correlation coefficient (ECC) amongst the resonating elements is &lt;0.003. Additionally, the bending analysis and specific absorption rate (SAR) of the presented antenna are examined. The overall size of the belt antenna is 30 mm × 574 mm × 1 mm. The designed belt antenna is suitable for WBAN applications due to its leather material, good on-body performance, and nearly identical simulated and experimental results.</p>","PeriodicalId":54944,"journal":{"name":"International Journal of RF and Microwave Computer-Aided Engineering","volume":"2024 1","pages":""},"PeriodicalIF":0.9,"publicationDate":"2024-08-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1155/2024/8442770","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141967847","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
An Improved Nonlinear I-V Model for GaN HEMTs GaN HEMT 的改进型非线性 I-V 模型
IF 0.9 4区 工程技术 Q4 COMPUTER SCIENCE, INTERDISCIPLINARY APPLICATIONS Pub Date : 2024-07-31 DOI: 10.1155/2024/8834864
Qingyu Yuan, Yixin Zhang, Xiaodong Luan, Jun Zhang, Chunxu Xie, Jiali Cheng

In this article, an improved nonlinear model for gallium nitride high-electron-mobility transistors (GaN HEMTs) is proposed. Aiming at the problem of insufficient accuracy of the nonlinear DC model caused by the self-heating effect and trap effect in the traditional model, this thesis uses the Softplus function to improve the traditional nonlinear DC model and establishes a nonlinear DC model including the self-heating effect, which is verified by the three GaN HEMT devices of different sizes. The MSE of Ids is less than 2.44 × 10−6. The traditional empirical basis model needs to calculate the partial derivative of the current expression with respect to Vds, which is tedious and complicated. The proposed model can be directly used to fit the Gm. The verification results show that the MSE of the Gm is less than 1.07 × 10−4, which proves the effectiveness of the equation.

本文提出了一种改进的氮化镓高电子迁移率晶体管(GaN HEMT)非线性模型。针对传统模型中自热效应和陷阱效应导致的非线性直流模型精度不足的问题,本文利用 Softplus 函数改进了传统的非线性直流模型,建立了包含自热效应的非线性直流模型,并通过三个不同尺寸的 GaN HEMT 器件进行了验证。Ids 的 MSE 小于 2.44 × 10-6。传统的经验基础模型需要计算电流表达式相对于 Vds 的偏导数,既繁琐又复杂。所提出的模型可直接用于拟合 Gm。验证结果表明,Gm 的 MSE 小于 1.07 × 10-4,这证明了方程的有效性。
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引用次数: 0
Constant False Alarm Detection Algorithm Based on KL Scattering 基于 KL 散射的恒定误报检测算法
IF 0.9 4区 工程技术 Q4 COMPUTER SCIENCE, INTERDISCIPLINARY APPLICATIONS Pub Date : 2024-07-29 DOI: 10.1155/2024/2218790
Chao Lv, Guozheng Li, Xun Huang, Dongqi Liu

With the continuous development of the radar field, millimeter-wave radar target detection, as a major tool, faces important challenges in improving detection performance. Especially in some application scenarios, due to multitarget interference and other reasons, the detection performance of the traditional variability index (VI) constant false alarm rate (CFAR) (VI-CFAR) algorithm decreases significantly in the case where both side windows contain interfering targets. To solve this problem, this paper introduces an innovative algorithm, Kullback–Leibler Divergence and Otsu’s Method Enhanced VI-CFAR (KLOVI-CFAR), to better adapt to the multitarget background environment. By combining the KL scattering and Otsu method, we realize the adaptive rejection of outliers in the reference window and further automatically select the detection algorithm adapted to the processed background environment. The results of simulation experiments verify the excellent detection performance of KLOVI-CFAR in multitarget environments with interfering targets in both side windows. The algorithm not only effectively improves the detection capability and antijamming but also shows good detection performance in homogeneous environment and clutter edge cases. The research results in this paper provide a useful reference for improving the radar target detection algorithm.

随着雷达领域的不断发展,毫米波雷达目标探测作为一种重要手段,在提高探测性能方面面临着重要挑战。特别是在一些应用场景中,由于多目标干扰等原因,在两个侧窗都包含干扰目标的情况下,传统的变异指数(VI)恒定误报率(CFAR)(VI-CFAR)算法的探测性能明显下降。为解决这一问题,本文引入了一种创新算法--库尔贝-莱布勒散度和大津方法增强型 VI-CFAR(KLOVI-CFAR),以更好地适应多目标背景环境。通过结合 KL 散射和大津方法,我们实现了对参考窗口中异常值的自适应剔除,并进一步自动选择适应处理后背景环境的检测算法。仿真实验结果验证了 KLOVI-CFAR 在两侧窗口均有干扰目标的多目标环境中的优异检测性能。该算法不仅有效提高了探测能力和抗干扰能力,而且在同质环境和杂波边缘情况下也表现出良好的探测性能。本文的研究成果为改进雷达目标检测算法提供了有益的参考。
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引用次数: 0
Design and Analysis of Irregular Hexagonal Patch Antenna Using Multiport Network Model (MNM) 使用多端口网络模型 (MNM) 设计和分析不规则六边形贴片天线
IF 0.9 4区 工程技术 Q4 COMPUTER SCIENCE, INTERDISCIPLINARY APPLICATIONS Pub Date : 2024-07-29 DOI: 10.1155/2024/8343100
Mishor Biswas, Soham Ghosh, Suman Dey, Kaushik Patra, Bhaskar Gupta

Multiport network model (MNM) of microstrip patch antennas is an extension of cavity model analysis. In MNM, electromagnetic fields present under and outside patch are modeled separately and the patch is considered as a planar element with multiple ports at its edges. The MNM approach was previously used for the analysis of different patches such as rectangular and circular. However, MNM analysis for irregular-shaped hexagonal patch antenna is not studied yet. Analysis of hexagonal patch antenna is required for its several advantages over other patches such as equivalent surface current distribution with less size compared to circular patch and higher bandwidth. In this work, the irregular-shaped hexagonal patch antenna is analyzed using MNM technique. The antenna is decomposed into rectangular and right-angle triangular segments. Multiport impedance (Z) matrices are calculated for all elements based on Green’s functions of corresponding shapes. Finally, the current distribution of the complete patch is obtained by connecting these elements using Z matrices. The irregular-shaped patch antenna is fabricated, and its responses are measured to verify the results obtained from MNM analysis. MNM can estimate antenna performance with ~3.5% average error with respect to simulated responses in terms of antenna performance parameters.

微带贴片天线的多端口网络模型(MNM)是空腔模型分析的延伸。在 MNM 中,贴片下方和外部的电磁场分别建模,贴片被视为边缘有多个端口的平面元件。MNM 方法以前曾用于分析矩形和圆形等不同的贴片。然而,对不规则形状的六角形贴片天线的 MNM 分析尚未研究。与其他贴片相比,六边形贴片天线具有多种优势,如等效表面电流分布、与圆形贴片相比尺寸更小、带宽更高,因此需要对六边形贴片天线进行分析。在这项工作中,使用 MNM 技术分析了不规则形状的六边形贴片天线。天线被分解成矩形和直角三角形段。根据相应形状的格林函数计算所有元件的多端口阻抗 (Z) 矩阵。最后,利用 Z 矩阵将这些元素连接起来,就得到了整个贴片的电流分布。我们制作了不规则形状的贴片天线,并对其响应进行了测量,以验证 MNM 分析得出的结果。就天线性能参数而言,MNM 估算的天线性能与模拟响应的平均误差约为 3.5%。
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引用次数: 0
Mounted Director Element on Dual-Band Vivaldi Antenna for Wireless Energy Harvesting Application 用于无线能量收集应用的双波段 Vivaldi 天线上安装的导向元件
IF 0.9 4区 工程技术 Q4 COMPUTER SCIENCE, INTERDISCIPLINARY APPLICATIONS Pub Date : 2024-07-25 DOI: 10.1155/2024/5552790
Saeed Hosseini, Changiz Ghobadi, Javad Nourinia, Majid Shokri

This paper presents radio frequency energy harvesting (RFEH) using a rectenna system for 3.1 and 5.75 GHz frequencies. The antenna used in this work is a Vivaldi antenna with a new structure. Mounting the newly designed parasitic element on the proposed Vivaldi antenna has improved the gain and directivity of the antenna. The parasitic element is introduced as the director element. The arms of the director element are expanded exponentially. We simulated the proposed antenna design in CST Studio Suite and simulated the proposed rectifier in an advanced design system (ADS). The substrates chosen for the antenna and rectifier are of low-cost type. We have used the voltage doubler technique for the rectifier. Good impedance matching using two stubs has made it possible to connect the rectifier to the antenna. We obtained RF to DC measurement results for the proposed design, which are 56.3% for 3.1 GHz at 8.5 dBm input power and 33.4% for 5.75 GHz at 6.5 dBm input power, respectively. After combining the antenna and the rectifier, the maximum efficiency measured for the power input of 5 dBm at the frequency of 3.1 GHz is equal to 50.8%, which is suitable for energy harvesting.

本文介绍了使用整流天线系统在 3.1 和 5.75 千兆赫频率上进行射频能量采集(RFEH)的情况。这项工作中使用的天线是一种具有新结构的 Vivaldi 天线。在拟议的 Vivaldi 天线上安装新设计的寄生元件提高了天线的增益和指向性。寄生元件被引入作为导向元件。导向元件的臂呈指数扩展。我们在 CST Studio Suite 中模拟了拟议的天线设计,并在高级设计系统 (ADS) 中模拟了拟议的整流器。天线和整流器选用的基板都是低成本类型。我们在整流器中使用了电压倍增器技术。使用两个存根的良好阻抗匹配使整流器与天线的连接成为可能。我们获得了拟议设计的射频至直流测量结果,在输入功率为 8.5 dBm 的情况下,3.1 GHz 的测量结果为 56.3%;在输入功率为 6.5 dBm 的情况下,5.75 GHz 的测量结果为 33.4%。将天线和整流器组合后,在 3.1 GHz 频率下,输入功率为 5 dBm 时测得的最大效率等于 50.8%,适合用于能量收集。
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引用次数: 0
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International Journal of RF and Microwave Computer-Aided Engineering
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