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2015 International Conference on Microwave, Optical and Communication Engineering (ICMOCE)最新文献

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Broadband E-shaped microstrip reflectarray antenna with microstrip antenna feed 带微带天线馈电的宽带e形微带反射天线
A. Deshmukh, K. Lele, A. Desai, S. Shaikh, S. Agrawal, K. Ray
Broadband reflectarray microstrip antenna with an array and feed element consisting of E-shaped patches is proposed. The reflect array configurations namely, 1 × 3, 3 × 1, plus-shaped and 3 × 3 arrays have been studied. A parametric study for varying distances between the fed E-shaped patch and array of E-shaped patches for varying slot dimensions is presented. The maximum gain of more than 12 dBi with bandwidth of more than 1200 MHz is realized in 3 × 3 reflect array configuration.
提出了一种由e形贴片组成的阵列和馈源单元的宽带反射式微带天线。研究了1 × 3、3 × 1、正形和3 × 3反射阵列的构型。提出了一种参数化的研究方法,研究了不同槽位尺寸下进料e形贴片与e形贴片阵列之间距离的变化。在3 × 3反射阵列配置中实现了大于12dbi的最大增益和大于1200mhz的带宽。
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引用次数: 1
Mode selection and interaction structure design of a megawatt class, sub-THz wave coaxial cavity gyrotron 兆瓦级亚太赫兹波同轴腔回旋管模式选择与交互结构设计
S. Yuvaraj, Sukwinder Singh, G. S. Baghel, M. Kartikeyan
In this paper, mode selection procedure leading to interaction circuit design of a 2 MW, 204 GHz coaxial cavity gyrotron suitable for Electron Cyclotron Resonance Heating of plasmas in future fusion experimental reactor DEMO tokamak is presented. By considering all design constraints, operating mode is selected as TE44,26. Diffractive quality factor, ohmic wall losses and coupling coefficient are calculated for the desired mode and competing modes of the designed structure. Surface Impedance Model (SIM) has been used for the calculation of the ohmic losses.
本文介绍了用于未来聚变实验堆DEMO托卡马克中电子回旋共振加热等离子体的2 MW、204 GHz同轴腔回旋加速器的模式选择过程。综合考虑各设计约束条件,选择工作模式为TE44、te26。计算了所设计结构的期望模式和竞争模式的衍射品质因子、欧姆壁损耗和耦合系数。欧姆损耗的计算采用了表面阻抗模型(SIM)。
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引用次数: 1
Design of a Miniature Ku-Band monopulse waveguide slotted array antenna 小型ku波段单脉冲波导开槽阵列天线的设计
M. Swetha, D. Jahagirdar
Slotted waveguide array antennas find wide applications in many microwave and radar systems requiring narrow beam and low side lobe level. Light weight, geometric simplicity, high power, limited scan volume and reliability make waveguide slotted arrays very useful for airborne radar application. A Miniature Ku-Band monopulse slotted waveguide array antenna in quarter height waveguide configuration for on-board radar application is presented. Antenna consists of five layers including monopulse comparator. All the layers of the antenna have been designed and analyzed using CST Microwave Studio. Taylor's aperture distribution is selected to obtain narrow beam with low sidelobes. This paper describes design, fabrication technique and electrical performance study to produce desired radiation pattern. The gain of the sum pattern is better than 23 dB while the side lobe level is -21dB in H-plane and -14dB in E-plane. The crossover of difference channels in both planes are around 3.8dB and the null depth in H-plane is 36dB and in E-plane is 25dB.
开槽波导阵列天线在许多需要窄波束和低旁瓣电平的微波和雷达系统中得到了广泛的应用。重量轻,几何简单,高功率,有限的扫描体积和可靠性使得波导狭缝阵列在机载雷达应用中非常有用。提出了一种适用于机载雷达的四分之一高度波导结构的微型ku波段单脉冲波导阵列天线。天线由五层组成,包括单脉冲比较器。利用CST Microwave Studio对天线各层进行了设计和分析。采用泰勒孔径分布可获得低旁瓣的窄光束。本文叙述了产生理想辐射图的设计、制造工艺和电性能研究。在h面和e面旁瓣电平分别为-21dB和-14dB的情况下,和型增益优于23db。两个平面的差分通道交叉在3.8dB左右,h平面的零深度为36dB, e平面的零深度为25dB。
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引用次数: 6
Artificial neural network with different learning parameters for crop classification using multispectral datasets 基于多光谱数据集的不同学习参数的人工神经网络作物分类
Pradeep Kumar, R. Prasad, V. Mishra, D. Gupta, A. Choudhary, P. Srivastava
Present study evaluated the performance of artificial neural network (ANN) algorithm using different learning parameters for various crop classification in Varanasi, India. Satellite images such as Linear Imaging Self Scanning (LISS) IV and Landsat 8 Operational Land Imager (OLI) were used for crop classification and comparative analysis study. The following crop such as barley, wheat, lentil, mustard, pigeon pea, linseed, corn, pea, sugarcane and other crops and non-crop such as water, sand, built up, fallow land, sparse vegetation and dense vegetation were identified in the area and classified. Results indicated a better classification accuracy of ANN algorithm for crop classification study when used with LISS-IV data in the comparison to Landsat 8-OLI multispectral satellite data. The larger values of the learning rates resulted high fluctuations and less classification accuracy using LISS-IV data, while less but nearly uniform results were found using the Landsat 8-OLI data.
本研究评估了人工神经网络(ANN)算法在不同学习参数下对印度瓦拉纳西不同作物分类的性能。利用线性自扫成像(LISS) IV和Landsat 8 Operational Land Imager (OLI)卫星影像进行作物分类和对比分析研究。在区域内识别出下列作物如大麦、小麦、扁豆、芥菜、鸽豆、亚麻籽、玉米、豌豆、甘蔗等作物和非作物如水、沙、积、休耕地、疏植被和密植被。结果表明,与Landsat 8-OLI多光谱卫星数据相比,使用LISS-IV数据进行作物分类研究时,ANN算法具有更好的分类精度。使用LISS-IV数据时,学习率值较大,导致波动较大,分类精度较低,而使用Landsat 8-OLI数据时,学习率值较少,但结果几乎一致。
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引用次数: 8
Performance analysis of WDM-free-space optical transmission system with M-QAM modulation under atmospheric and optical nonlinearities 大气和光学非线性条件下M-QAM调制wdm自由空间光传输系统性能分析
R. Jee, S. Chandra
In this paper, we have studied the performance of M-QAM based free-space optical link (FSO) integrated with Wavelength-division multiplexing (WDM) in the presence of both optical nonlinearity and atmospheric turbulence. Our analysis shows that joint effect of optical and FSO channel nonlinearity degrades the transmission performance link performs in terms of BER and EVM. The optimization in terms of optical modulation index (OMI) to mitigate the above detrimental factors is also presented.
在本文中,我们研究了基于M-QAM的自由空间光链路(FSO)与波分复用(WDM)相结合在光学非线性和大气湍流条件下的性能。我们的分析表明,光信道和FSO信道非线性的共同作用会降低链路的传输性能,包括误码率和EVM。本文还提出了基于光调制指数(OMI)的优化方法来减轻上述不利因素。
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引用次数: 7
Design and performance analysis of slotted circular microstrip antenna 开槽圆形微带天线的设计与性能分析
Krishnananda, R. S. Rao
This paper presents about performance analysis of circular microstrip patch antenna over which square and circular slots have been etched. The proposed antenna is designed at 2.4GHz which is suitable for WLAN base station antenna. This antenna provides circular polarization with wide bandwidth.
本文对刻蚀了方槽和圆槽的圆形微带贴片天线进行了性能分析。该天线的设计频率为2.4GHz,适用于WLAN基站天线。这种天线提供宽带宽的圆极化。
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引用次数: 6
Design of multi-layer fractal inductor for RF applications 射频应用中多层分形电感的设计
P. A. Kumar, N. Rao
Multilayered spiral inductor using fractal geometry is proposed. The proposed inductor achieves a high Q factor (Q) of 24.25 at a frequency of 19GHz with 43.5GHz as self resonant frequency (SRF). Design and EM simulations are performed by using high frequency structural simulator (HFSS) for 0.18μm TSMC technology. The results show 84.72% higher Quality factor than planar inductor with no negligible degradation in inductance value for over planar inductors. The results also show an 80% increase in SRF over planar inductor.
提出了一种基于分形几何的多层螺旋电感。该电感器在19GHz频率下实现了24.25的高Q因数,自谐振频率(SRF)为43.5GHz。采用高频结构模拟器(HFSS)对0.18μm TSMC工艺进行了设计和电磁仿真。结果表明,过平面电感的质量因数比平面电感高84.72%,且电感值没有可忽略的下降。结果还表明,与平面电感相比,SRF提高了80%。
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引用次数: 3
Muscle degradation detection — A practical medical application analysis 肌肉退化检测-实际医疗应用分析
Sumant Kumar Mohapatra, Sushil Kumar Mahapatra, Sakuntala Mahapatra, S. K. Tripathy
In biomedical engineering field, signals are broadly used. In medical field, by the help of signal processing which is used to detect the stress and strain factor on body muscles, we can reduce the effect on our muscles. This paper aims at finding an optimum point for muscles breakdown to reduce the use of external elements like drugs and protein medicines to keep muscles intact. Muscles tearing originated due to same undesirable expansion and contraction due to same excess stress. To predict the band and know the maximum point is the goal. MATLAB software signal processing is done for simulating and executing different EMG signals. For modification the process was executed by a single processor unit and sets up a base to send to the main computer. First the muscle signal is extracted and given to the processors for further application like noising and denoising etc, which is the result, can calculate the breakdown level by adding two different components of muscle signal. Doctors can predict medication and therapy for maintain a required level of stress on body muscles which results in detection of management. This leads to proper functioning of muscles and less impact of stress on them to limit breakdown. By referring this concept a new application of same can be developed.
在生物医学工程领域,信号有着广泛的应用。在医学领域,通过信号处理来检测人体肌肉的应力应变因素,可以减少对肌肉的影响。本文旨在寻找肌肉分解的最佳点,以减少药物和蛋白质药物等外部元素的使用,保持肌肉的完整。肌肉撕裂起源于相同的不希望的扩张和收缩,由于相同的过度压力。预测频带并知道最大值是目标。用MATLAB软件进行信号处理,模拟和执行不同的肌电信号。为了进行修改,该过程由单个处理器单元执行,并建立一个发送给主计算机的基地。首先将肌肉信号提取出来,交给处理器进行去噪、去噪等进一步处理,将肌肉信号的两个不同分量相加,就可以计算出击穿电平。医生可以预测药物和治疗,以维持身体肌肉所需的压力水平,从而发现管理。这可以使肌肉正常运作,减少压力对肌肉的影响,从而限制肌肉的崩溃。借鉴这一概念,可以开发出一种新的应用。
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引用次数: 0
Design optimization of PBG based PIFA system using soft computing techniques 基于PBG的PIFA系统软计算优化设计
Pavani Vijay Reddy, B. Lakshmi, B. Choudhury
Planar inverted F antennas have wide range of applications in wireless industry those includes mobile handset antennas, wireless sensors in aircraft fuel tanks to check the fuel availability status etc. One of the game changing technologies of wireless industry is design and development of compact, light weight antenna with low specific absorption rate. The antenna size can significantly be reduced by introducing metamaterial structures. In this paper, design optimization of a photonic band gap structure based compact, high impedance bandwidth planar inverted F antenna has been reported. The optimized antenna shows an impedance bandwidth of 39.9% and a gain of 6.03 dB whereas the conventional PIFA is of 25.4% only.
平面倒F天线在无线工业中有着广泛的应用,包括手机天线、飞机油箱中的无线传感器以检查燃油可用状态等。设计和开发体积小、重量轻、比吸收率低的天线是改变无线产业格局的技术之一。通过引入超材料结构可以大大减小天线的尺寸。本文报道了一种基于光子带隙结构的紧凑、高阻抗带宽平面倒F型天线的优化设计。优化后的天线阻抗带宽为39.9%,增益为6.03 dB,而传统的PIFA仅为25.4%。
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引用次数: 2
A study of influence of fast fading on the performance of mobile communication system 快速衰落对移动通信系统性能影响的研究
J. A. Shrawankar, K. Kulat
In this paper we have emphasized on the short term fading of the mobile communication channel and made an attempt to investigate its influence on the performance of mobile communication system. Level crossing rate and average duration of fade are considered to characterize the fast fading nature of channel. Other factors like carrier frequency, speed of the mobile have been investigated and found that BER performance of the system is greatly influenced by multipath fading.
本文着重研究了移动通信信道的短期衰落问题,并尝试研究其对移动通信系统性能的影响。信道的快速衰落特性考虑了平交速率和平均衰落持续时间。对载波频率、移动速度等其他因素进行了研究,发现多径衰落对系统的误码率性能影响很大。
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引用次数: 1
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2015 International Conference on Microwave, Optical and Communication Engineering (ICMOCE)
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