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2022 IEEE Wireless Antenna and Microwave Symposium (WAMS)最新文献

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Design of a Wide-Band Circuit Analog Absorber Using Modified Square Loop Loaded with Lumped Resistors 一种带有集总电阻的改进方环宽带电路模拟吸收器的设计
Pub Date : 2022-06-05 DOI: 10.1109/WAMS54719.2022.9848412
A. Ovhal, Aparna Parameswaran, Debidas Kundu, H. Sonalikar
In this paper, a modified square loop based circuit analog absorber with improved performance is presented. The absorber consists of a substrate with two FR4 dielectric layers separated by an air gap. On the top of the layer, a modified square loop loaded with lumped resistors is used. There is a continuous metal ground plane at the bottom layer. The proposed absorber produces three resonance frequencies in the absorption band, increasing the 10 dB reflection reduction bandwidth. It has the thickness of $0.08lambda_{mathrm{L}}$, where $lambda_{mathrm{L}}$ is a wavelength corresponding to the lowest frequency of the absorption bandwidth. It offers 10 dB absorption bandwidth of 99.24% from 3.98 GHz to 11.82 GHz which includes C band and a major part of X band, making it suitable for radar signature related applications. The simulation results show stable absorption performance for oblique incidences up to 30 degree for both the TE and TM polarized waves.
本文提出了一种改进的基于方回路的电路模拟吸收器,其性能得到了提高。吸收体由具有两个由气隙分隔的FR4介电层的衬底组成。在层的顶部,使用了一个带有集总电阻的改进的方形环路。在底层有一个连续的金属接地面。所提出的吸收器在吸收带产生三个共振频率,增加了10 dB的反射衰减带宽。它的厚度为$0.08lambda_{mathrm{L}}$,其中$lambda_{mathrm{L}}$是吸收带宽的最低频率对应的波长。它在3.98 GHz至11.82 GHz范围内提供99.24%的10db吸收带宽,其中包括C波段和X波段的主要部分,使其适合雷达特征相关应用。仿真结果表明,TE和TM极化波在30度斜入射范围内具有稳定的吸收性能。
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引用次数: 0
Miniaturized Dual Band U-Shaped Structure Microstrip Patch Antenna for Wireless Applications 用于无线应用的小型化双频u型结构微带贴片天线
Pub Date : 2022-06-05 DOI: 10.1109/WAMS54719.2022.9848140
S. Kannadhasan, R. Nagarajan, Kanagaraj Venusamy
In this paper, a U-shaped microstrip slot antenna with dual frequencies of 1.68GHz and 2.78GHz is created. The suggested antenna construction provides a wide range of communications capabilities for the operating frequencies, as well as a large bandwidth and double band. The substrate for the proposed antenna is FR4. The substrate thickness is 1.6 mm, and the U-shaped antenna has a relative permittivity of 4.2 and a dielectric loss tangent of 0.002. The suggested U-shaped structure has simulated and analyzed the gain, return loss, VSWR, and radiation pattern using a modelling tool.
本文设计了一种双频1.68GHz和2.78GHz的u型微带槽天线。建议的天线结构为工作频率提供了广泛的通信能力,以及大带宽和双频。所提天线的基板为FR4。衬底厚度为1.6 mm, u形天线的相对介电常数为4.2,介电损耗正切为0.002。使用建模工具模拟和分析了所建议的u形结构的增益、回波损耗、驻波比和辐射方向图。
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引用次数: 0
Design of a Narrowband and a Wideband Switchable Absorber/Reflector Using an Active Frequency Selective Surface With Embedded Biasing Network 窄带和宽带可切换吸收/反射器的有源频率选择表面嵌入偏置网络设计
Pub Date : 2022-06-05 DOI: 10.1109/WAMS54719.2022.9847730
Priyanka Bajaj, Debidas Kundu, D. Singh
This paper presents the design of an active frequency selective surface (AFSS)-based switchable absorber/reflector with polarization-insensitive characteristics. Initially, a narrowband absorber/reflector is realized. Later, lumped resistors are loaded in the same FSS geometry to obtain a switchable absorber/reflector for broadband frequencies. Both the designs consist of an AFSS layer printed at the uppermost surface of one dielectric substrate and a metal ground at the bottom of another dielectric substrate. The switchability between the absorption and reflection state is realized by regulating the PIN diode's OFF/ON states, respectively, employed at the top AFSS layer. The simulated results show that the proposed narrowband structure resonates at 3.24 GHz with a reflection coefficient lower than −10 dB in absorber mode. It acts as a perfect reflector at the same frequency when switched to the reflector mode. In addition, the same structure acts as an absorber for broadband frequencies ranging from 4.89 GHz to 10.28 GHz with less than −10 dB reflection coefficients and a reflector from 4.89-7.95 GHz with a peak return loss of less than 3 dB after proper loading of lumped resistors and air-spacer. Furthermore, the biasing networks for the PIN diodes used in both the structures are embedded within the geometry, which eliminates the requirement of additional bias lines.
提出了一种基于有源频率选择表面(AFSS)的具有偏振不敏感特性的可切换吸收/反射器的设计。最初,实现了窄带吸收/反射器。之后,集总电阻被加载到相同的FSS几何结构中,以获得宽带频率的可切换吸收/反射器。这两种设计都包括印刷在一个介电基板最上面表面的AFSS层和在另一个介电基板底部的金属接地。吸收和反射状态之间的切换是通过分别调节AFSS顶层的PIN二极管的OFF/ON状态来实现的。仿真结果表明,该窄带结构谐振频率为3.24 GHz,在吸收模式下反射系数小于−10 dB。当切换到反射器模式时,它在相同的频率下充当完美的反射器。此外,该结构在4.89 GHz至10.28 GHz的宽带频率范围内作为吸收器,反射系数小于- 10 dB;在4.89 GHz至7.95 GHz的宽带频率范围内,在适当加载集总电阻和空气间隔器后,反射器的峰值回波损耗小于3 dB。此外,在这两种结构中使用的PIN二极管的偏置网络都嵌入在几何结构中,从而消除了对额外偏置线的要求。
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引用次数: 0
A Neural Network Model to Predict the Radiation Resistance of Dipole Antenna 偶极子天线辐射电阻预测的神经网络模型
Pub Date : 2022-06-05 DOI: 10.1109/WAMS54719.2022.9847856
N. K. Sahoo, Swapnil Gaul, Devikrishna L, Malavika Menon S, Swapnil Sinha, A. Mohamed
This paper presented a multi-layer neural network model for the calculation of the radiation resistance of a dipole antenna. The network is trained using the data generated from the TaraNG solver. The data consist of radiation resistances and their corresponding frequencies. The proposed neural network structure is 1-20-20-20-1. The model contains one input layer, three hidden layers and one output layer. The predicted result is well agreed with TaraNG solver results.
提出了一种计算偶极子天线辐射电阻的多层神经网络模型。网络使用TaraNG求解器生成的数据进行训练。数据包括辐射电阻及其相应的频率。提出的神经网络结构为1-20-20- 1。该模型包含一个输入层、三个隐藏层和一个输出层。预测结果与TaraNG求解结果吻合较好。
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引用次数: 0
Computationally Stable MIMO Digital Predistortion for Power Amplifier based on Orthogonal Polynomial 基于正交多项式的功率放大器计算稳定MIMO数字预失真
Pub Date : 2022-06-05 DOI: 10.1109/WAMS54719.2022.9848258
Shipra, Ashish Kumar, M. Rawat
This study introduces orthogonal polynomials, a useful tool for simulating power amplifier behaviour and linearizing utizing Digital Predistortion (DPD). The numerical stability of the system is improved by using an orthogonal polynomial basis. The representation is compared to the conventional polynomial in terms of numerical stability for the $4times 4$ MIMO system. LTE-OFDM signals were used to test the performance of the proposed DPD. The observed ACPR and NMSE of the OFDM signal were enhanced from −29 dB to −50 dB and from −8 dB to −35 dB by adopting the suggested DPD linearization topology.
本研究引入正交多项式,这是模拟功放行为和利用数字预失真(DPD)进行线性化的有用工具。采用正交多项式基提高了系统的数值稳定性。在$4 × 4$ MIMO系统的数值稳定性方面,将该表示与传统多项式进行了比较。使用LTE-OFDM信号测试了所提出的DPD的性能。采用所提出的DPD线性化拓扑,OFDM信号的ACPR和NMSE分别从−29 dB和−8 dB提高到−50 dB和−35 dB。
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引用次数: 0
UWB Monopole Antenna with Triple Band Suppression Characteristics 具有三波段抑制特性的超宽带单极天线
Pub Date : 2022-06-05 DOI: 10.1109/WAMS54719.2022.9848376
NS Vamsi, M. Vamshi, K. Murali
A UWB Monopole Antenna is proposed in this paper which is able to notch at three different frequency bands. It operates in the frequency range between 3.1GHz to 10.6GHz which meets the requirements of ultra-wide band applications. The notching obtained at different bands is of high rejection which has maximum value of VSWR up to 28. The proposed antenna is modeled on a RO4003TM substrate which has dimensions of $28times 24 text{mm}^{2}$. The proposed antenna is being integrated with stub and in the lower layer of the patch two axe like structures are removed which helps in filtering out the three different bands without disturbing the performance of the antenna.
本文提出了一种能够在三个不同频段陷波的超宽带单极天线。它的工作频率范围在3.1GHz到10.6GHz之间,满足超宽带应用的要求。在不同波段得到的陷波抑制效果好,最大驻波比可达28。所提出的天线在RO4003TM基板上建模,其尺寸为$28 × 24 text{mm}^{2}$。所提出的天线与短段集成在一起,并且在贴片的下层移除了两个斧状结构,这有助于在不干扰天线性能的情况下过滤掉三个不同的频段。
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引用次数: 0
Design and Simulation of Microstrip Antenna on High-Temperature Super Conductor and Copper 高温超导体和铜微带天线的设计与仿真
Pub Date : 2022-06-05 DOI: 10.1109/WAMS54719.2022.9848078
B. K. Pandey, D. Pujara, V. Singh, M. Mahajan
In this paper theoretical comparison of the efficiency of planar microstrip antenna for normal metal copper and high temperature superconducting (HTS) metal is discussed. Expressions for electrical conductivity and surface impedance in copper and high-temperature superconductor YBa2Cu3O7 are evaluated at 10GHz frequency. Direct fed rectangular microstrip patch has been selected for the comparison. The electrically small antenna has been designed at 10 GHz frequency on high permittivity substrate LaAlO3 with a low dielectric loss tangent. The radiation patterns at 10GHz and the radiation efficiency as a function of frequency for microstrip antenna have been compared using software simulation.
本文从理论上比较了普通金属铜和高温超导金属的平面微带天线的效率。计算了铜和高温超导体YBa2Cu3O7在10GHz频率下的电导率和表面阻抗表达式。选择直接馈电矩形微带贴片进行比较。在具有低介电损耗正切线的高介电常数LaAlO3衬底上设计了10 GHz频率的电小型天线。通过软件仿真比较了微带天线在10GHz时的辐射方向图和辐射效率随频率的变化规律。
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引用次数: 0
Polarization and Angle Insensitive Fractal based Absorber for Multiband Application 偏振角不敏感分形多波段吸收器
Pub Date : 2022-06-05 DOI: 10.1109/WAMS54719.2022.9848076
S. D. P. Bikkuri, S. Bhavanam
A low-profile, metamaterial absorber with wide angles of incidence and polarization insensitive behaviour is reported in this paper. The proposed structure consists of a L shaped resonator with Pythagorean tree fractal structure capable of exhibiting near unity absorption in three frequency bands. The proposed structure provides absorption of more than 90% over three frequency bands namely 5.9GHz, 11.9GHz and 15.01GHz respectively. Over these frequency bands the structure remained polarization insensitive upto 70 degree and angle insensitive upto 30 degree.
本文报道了一种具有宽入射角和偏振不敏感特性的低姿态超材料吸收体。所提出的结构由一个L形谐振腔组成,该谐振腔具有毕达哥拉斯树分形结构,能够在三个频段内表现出接近统一的吸收。所提出的结构在分别为5.9GHz、11.9GHz和15.01GHz的三个频段上提供90%以上的吸收。在这些频带上,该结构在70度范围内保持极化不敏感,在30度范围内保持角度不敏感。
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引用次数: 0
Double Ridge Conical Horn Antenna with Dielectric Loading for Microwave Imaging of Human Breast 用于人体乳房微波成像的介电负载双脊锥形喇叭天线
Pub Date : 2022-06-05 DOI: 10.1109/WAMS54719.2022.9848224
Athul O. Asok, G. J, Ayush Tripathi, Suraj Chauhan, Kadiyam Sai Kiran, Sukomal Dey
This work describes a compact Double Ridge Conical Horn (DRCH) antenna utilized for ultra-wideband (UWB) Microwave Imaging (MI) applications. The proposed DRCH is appended with a dielectric lens to improve its radiation performance. The proposed antenna achieves a bandwidth from 3.4 GHz to around 20 GHz with good impedance matching. The designed antenna attains a peak gain of 25.22 dBi at 19 GHz. The applicability of the proposed antenna for microwave imaging applications is tested by checking its Specific Absorption Rate (SAR) value. Finally, the proposed antenna is used to image breast tumours in a planar breast phantom with a reduced Delay and Sum (DAS) algorithm.
本工作描述了一种用于超宽带(UWB)微波成像(MI)应用的紧凑型双脊锥形喇叭(DRCH)天线。为了提高DRCH的辐射性能,在DRCH上增加了一个介电透镜。该天线实现了3.4 GHz到20 GHz左右的带宽,阻抗匹配良好。所设计的天线在19 GHz时的峰值增益为25.22 dBi。通过检查天线的比吸收率(SAR)值来测试天线在微波成像应用中的适用性。最后,利用减少延迟和和(DAS)算法将该天线用于平面乳房幻象中的乳腺肿瘤成像。
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引用次数: 6
Metamaterial based triple-band Circular Patch antenna for 5G Sub 6 GHz Applications 5G Sub 6 GHz应用的基于超材料的三波段圆形贴片天线
Pub Date : 2022-06-05 DOI: 10.1109/WAMS54719.2022.9847734
Shankar. M. Patil, R. V.
A triple-band compact circular patch antenna with hexagonal complementary split ring resonators (CSRR) is proposed for sub-6 GHz 5G applications. A circular patch antenna is created on the top plane of the proposed triband antenna. The ground plane is etched with hexagonal CSRRs, multiple band generation and size reduction (at the lower bands). The circular patch antenna's initial resonance is likewise shifted from 5.25 GHz to 6.52 GHz and 4.88 GHz due to the CSRR. WiMAX, 5G sub-6 GHz, and WLAN operating frequencies can all be covered by the proposed triple antenna band of 3.35 GHz (3.27-3.83 GHz), 4.46 GHz (4.20-4.69 GHz), and 5.63 GHz (5.54-5.99 GHz) respectively. This can be performed by meticulously calculating the CSRR's size and location on the ground plane. The design is $32times 36 text{mm}^{2}$ in size and is made on a low-cost FR-4 substrate.
提出了一种基于六方互补分环谐振器(CSRR)的三频带紧凑型圆形贴片天线,用于6ghz以下的5G应用。在所提出的三带天线的顶平面上创建圆形贴片天线。地平面蚀刻了六边形csrr,多波段生成和尺寸减小(在较低的波段)。由于CSRR,圆形贴片天线的初始共振同样从5.25 GHz转移到6.52 GHz和4.88 GHz。WiMAX、5G sub-6 GHz和WLAN的工作频率都可以被提议的三天线频段3.35 GHz (3.27-3.83 GHz)、4.46 GHz (4.20-4.69 GHz)和5.63 GHz (5.54-5.99 GHz)覆盖。这可以通过仔细计算CSRR的大小和在地平面上的位置来实现。该设计尺寸为$32 × 36 text{mm}^{2}$,采用低成本FR-4基板制作。
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引用次数: 0
期刊
2022 IEEE Wireless Antenna and Microwave Symposium (WAMS)
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