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2013 Cross Strait Quad-Regional Radio Science and Wireless Technology Conference最新文献

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Comparative analysis on the fast rising edge pulse source with two kinds of avalanche transistor 两种雪崩晶体管快速上升沿脉冲源的对比分析
Pub Date : 2013-07-21 DOI: 10.1109/CSQRWC.2013.6657451
Qingxi Yang, Zhou Xing, Qing-guo Wang, Zhao Min
A fast rising edge pulse can be generated by Marx circuit based on avalanche transistors. The avalanche principle of a Marx circuit is analysed. and the triggering circuit and ten stages Marx circuit board are designed. A series of negative pulses with falling edge time about 2ns,voltage amplitude from about 700V to 1600V and pulse width below 6ns are obtained when the Marx circuit is ten stages based on the FMMT415 and FMMT417 by changing the charging voltage and the capacity. The pulse waveforms based two kinds of avalanche transistors are compared. The results are that a higher peak pulse can be get based on the FMMT417 than the FMMT415, the peak value will be lager when the charging voltage is higher, and pulse-width will be lager when the capacities are bigger within a certain limit.
基于雪崩晶体管的马克思电路可以产生快速上升沿脉冲。分析了马克思电路的雪崩原理。设计了触发电路和十级马克思电路板。在FMMT415和FMMT417的基础上,通过改变充电电压和容量,得到了一系列降边时间约为2ns、电压幅值约为700V ~ 1600V、脉冲宽度小于6ns的负脉冲。比较了两种雪崩晶体管的脉冲波形。结果表明:基于FMMT417的脉冲峰值比基于FMMT415的脉冲峰值高,充电电压越高脉冲峰值越大,在一定范围内容量越大脉冲宽度越大。
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引用次数: 6
An insert-fed Ku-band microstrip antenna array for DBS application 用于DBS应用的插入馈电ku波段微带天线阵列
Pub Date : 2013-07-21 DOI: 10.1109/CSQRWC.2013.6657386
Hui Zhang, Zeng Li, Junhong Wang, Xueqin Zhang, Yaoqing Yang
This paper presents the design and implementation of a novel Ku -band microstrip antenna array with an insert feeding network for direct broadcast satellite (DBS) application. The proposed antenna array features fewer elements, lower profile, and better performance than existing designs. The insert microstrip feeding network makes it convenient to adjust input impedance of the array. The optimal structure of the antenna array was determined by investigating the effect of antenna structure parameters on return loss of the array. The antenna array with optimal structure dimension was fabricated and measured. Both simulation and measurement results show that the operating frequency bandwidth of the antenna array for |S11| >10 dB covers a wider bandwidth of 11.4 GHz - 12.8GHz. Far field measurements in the E and H planes show that the proposed design can achieve the desired radiation patterns.
本文设计并实现了一种新型的带插入馈电网络的Ku波段微带天线阵列,用于卫星直播。所提出的天线阵列具有比现有设计更少的元件,更低的轮廓和更好的性能。插入式微带馈电网络便于调整阵列的输入阻抗。通过研究天线结构参数对天线阵回波损耗的影响,确定了天线阵的最佳结构。制作并测量了最优结构尺寸的天线阵。仿真和测量结果表明,该天线阵列在|S11| > 10db下的工作频率带宽覆盖了11.4 GHz - 12.8GHz的更宽带宽。在E和H平面的远场测量表明,所提出的设计可以达到期望的辐射方向图。
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引用次数: 3
Design of a passive self-interference cancellation network with high cancellation ratio 高对消比无源自干扰对消网络的设计
Pub Date : 2013-07-21 DOI: 10.1109/CSQRWC.2013.6657345
Jinxin Li, Shiwen Yang, Z. Nie
A passive self-interference cancellation network (SICN) is proposed in this paper. The network is composed of three directional couplers and microstrip delay lines. By adjusting the coupling factor of the two parallel coupled line directional couplers and the length of the delay lines, the proposed SICN is able to produce an optimized reference signal with approximate equal amplitude and 180° phase difference to the self-interference signal (SIS), and the cancellation of SIS is thus achieved. Numerical simulation results of the proposed network shows a better reflection coefficient level less than -23 dB over the LTE band of 2.5GHz - 2.57GHz. The cancellation ratio is more than 12dB, while the insertion loss of receive channel is about 0.12dB. Another numerical example for the band of 2.62GHz - 2.69GHz is also simulated and discussed. Details of the proposed cancellation network designs are described and the simulated results are presented and discussed.
提出了一种无源自干扰消除网络(SICN)。该网络由三个定向耦合器和微带延迟线组成。通过调整两个平行耦合线定向耦合器的耦合系数和延迟线的长度,所提出的SICN能够产生与自干扰信号(SIS)幅值近似相等、相位差为180°的优化参考信号,从而实现自干扰信号的消除。数值仿真结果表明,该网络在2.5GHz ~ 2.57GHz LTE频段上的反射系数水平小于-23 dB。对消比大于12dB,而接收信道的插入损耗约为0.12dB。本文还对2.62GHz ~ 2.69GHz频段的另一个数值算例进行了仿真和讨论。详细描述了所提出的对消网络设计,并给出了仿真结果并进行了讨论。
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引用次数: 2
The design of layered luneberg lens with radially-drilled-hole-structure 径向钻孔结构层状luneberg透镜的设计
Pub Date : 2013-07-21 DOI: 10.1109/CSQRWC.2013.6657394
Xiaofeng He, Shiwen Yang, Long Yuan, Z. Nie
In this paper, a novel design method for layered concentric Luneberg lens with radially drilled holes in the low loss dielectrics is presented, based on the effective medium theories (EMT's). The radially-drilled-holes structure of the effective dielectric is illustrated and the formulas for calculating the dielectric constant are also presented. Base on the design method, a 30cm two-layered luneberg lens, operating at Ku/K band, is then designed, and a hemisphere lens with reflective ground plane is also taken into account in the design to reduce the profile height and the weight of the antenna. Simulated results are then presented. The gain/efficiency of the antenna is 31.0dBi/81.6% and 34.5dBi/67.9% at 12.5G and 20.45G respectively. It is shown that the lens made from this effective material with radially-drilled-hole structure has the advantage of low loss and isotropy as compared to those made from the traditional foamed dielectric.
基于有效介质理论,提出了一种在低损耗介质中径向钻孔的层状同心圆吕内伯格透镜的设计方法。给出了有效介质的径向钻孔结构和介电常数的计算公式。在此设计方法的基础上,设计了工作在Ku/K波段的30cm双层luneberg透镜,并考虑了带反射地平面的半球透镜,以降低天线的轮廓高度和重量。然后给出了仿真结果。在12.5G和20.45G时,天线的增益/效率分别为31.0dBi/81.6%和34.5dBi/67.9%。结果表明,与传统的泡沫介质相比,用这种径向钻孔结构的有效材料制成的透镜具有低损耗和各向同性的优点。
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引用次数: 0
A hybrid belief propagation decoding algorithms of LDPC codes for fast convergence 一种LDPC码快速收敛的混合信念传播译码算法
Pub Date : 2013-07-21 DOI: 10.1109/CSQRWC.2013.6657436
Tso-Cho Chen, Chia-Jung Li, E. Lu
A hybrid belief propagation (BP) decoding algorithm for low-density parity-check code is proposed to accelerate the convergence of decoding and reduce the number of decoding iterations. The hybrid scheme is presented by integrating the BP algorithm with the bit-flipping function which is used as adaptive weighted factor in the BP iteration decoding. The adaptive weighting factor is based on the average weighted reliability measure of the hard output of decoder. The proposed hybrid adaptive weighted iteration scheme can efficiently increase the convergence speed of the belief propagation decoding and therefore improve the error performance. Simulation results show that the proposed algorithm can significantly reduce the decoding complexity and achieve better error performances as compared with the sum-product algorithm.
针对低密度奇偶校验码,提出了一种混合信念传播(BP)译码算法,以加快译码的收敛速度,减少译码迭代次数。将BP算法与作为BP迭代译码自适应加权因子的比特翻转函数相结合,提出了BP迭代译码的混合方案。自适应加权因子基于解码器硬输出的平均加权可靠性度量。提出的混合自适应加权迭代方案可以有效地提高信念传播译码的收敛速度,从而改善误差性能。仿真结果表明,与和积算法相比,该算法能显著降低译码复杂度,获得更好的误码性能。
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引用次数: 3
Aquaculture monitoring system based on fuzzy-PID algorithm and intelligent sensor networks 基于模糊pid算法和智能传感器网络的水产养殖监测系统
Pub Date : 2013-07-21 DOI: 10.1109/CSQRWC.2013.6657435
Bo Chang, Xinrong Zhang
According to the development needs of aquaculture modernization, the wireless sensor network (WSN) technology is introduced into the development of aquaculture monitoring system, which can effectively solve the problem of complex work environment, scattered monitoring locations, and high wiring cost in the aquaculture. The system uses CC2530 as the core to develop wireless sensor nodes which follow the ZigBee protocol, uses the data collection terminal with high-precision sensor to collect data of the environment for achieving real-time monitoring of aquaculture environment and uses the fuzzy PID control algorithm to process environmental parameters for improving the accuracy of test data. The management function of various sensor nodes is achieved based on embedded database. The system realized the real time measurement and control for the dissolved oxygen, temperature, pH and other parameters of the culture water, reduced energy consumption, reduced latency and increased intensification and intelligent level of aquaculture. The monitoring results have shown that this system is usefulness and efficiency and can meet the application requirement of monitoring environmental parameters in aquaculture.
根据水产养殖现代化的发展需要,将无线传感器网络(WSN)技术引入到水产养殖监测系统的开发中,可以有效解决水产养殖中工作环境复杂、监测地点分散、布线成本高等问题。本系统以CC2530为核心,开发遵循ZigBee协议的无线传感器节点,采用具有高精度传感器的数据采集终端采集环境数据,实现对水产养殖环境的实时监测,并采用模糊PID控制算法对环境参数进行处理,提高测试数据的准确性。基于嵌入式数据库实现了各传感器节点的管理功能。该系统实现了对养殖水溶解氧、温度、pH等参数的实时测量和控制,降低了能耗,减少了延迟,提高了养殖的集约化和智能化水平。监测结果表明,该系统具有实用性和高效性,能够满足水产养殖环境参数监测的应用需求。
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引用次数: 13
Research on the influence of tactic maneuver of target detection 战术机动对目标探测的影响研究
Pub Date : 2013-07-21 DOI: 10.1109/CSQRWC.2013.6657425
Zhou Chao, Zhang Xiao-kuan, Zhuang Ya-qiang, Zhang Chen-xin, Liu Cang
In view of the application problem of the tactic maneuver of stealth target, the electromagnetic model of one typical stealth target is established and all airspace static RCS is gained in firstly. Secondly, the relationship between tactic maneuver and the line of sight of radar is analyzed. And then the dynamic RCS series is exhibited through different yaw, pitch and rolling maneuver. Finally, the detection probability calculation model is structured and the influence on detection probability is simulated through MATLAB programs when tactic maneuver is adopted by stealth target. Also the conclusions are generally obtained through simulation and the simulation provided a method foundation and experiment evidence for application of tactic maneuver of stealth aircraft.
针对隐身目标战术机动的应用问题,首先建立了一个典型隐身目标的电磁模型,获得了全空域静态RCS。其次,分析了战术机动与雷达瞄准线的关系。然后通过不同的偏航、俯仰和滚转机动来展示动态RCS系列。最后,构建了探测概率计算模型,并通过MATLAB程序仿真了隐身目标采用战术机动对探测概率的影响。仿真结果为隐身飞机战术机动的应用提供了方法依据和实验依据。
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引用次数: 1
Influences of loading layout on parameters and coaxial cable coupling laws in reverberation chamber 加载布置对混响室参数及同轴电缆耦合规律的影响
Pub Date : 2013-07-21 DOI: 10.1109/CSQRWC.2013.6657339
Wang Shuqiao, W. Qingguo, Jia Rui
Through the test of field intensity, power and the S21 of reverberation chamber, the Q value and the independent sampling points with absorbing material loaded in different positions are calculated in this paper, and the result show that as the loading position varies the parameters of reverberation chamber mentioned above differ. And this paper presents the method of using network analyzer and electro-optical conversion equipment to test the laws of coaxial cable coupling. The impact of loadings on coaxial cable coupling is also analyzed.
本文通过对混响室的场强、功率和S21的测试,计算了不同位置加载吸波材料的Q值和独立采样点,结果表明,随着加载位置的不同,混响室的上述参数也不同。本文介绍了利用网络分析仪和电光转换设备测试同轴电缆耦合规律的方法。分析了载荷对同轴电缆耦合的影响。
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引用次数: 0
Study on electromagnetic scattering from Gaussian rough surface of layered medium with circular polarized wave incidence 圆极化波入射层状介质高斯粗糙表面电磁散射研究
Pub Date : 2013-07-21 DOI: 10.1109/CSQRWC.2013.6657416
X. Ren
The electromagnetic scattering from the rough surface of layered medium with circular polarized wave incidence is studied, the formulae of the scattering coefficient for different polarization is derived using the small perturbation method. A Gaussian rough surface is presented for describing the natural surface of layered medium, the formulae of the bistatic scattering coefficient is deduced. The angular distribution of the bistatic scattering coefficient that the incident wave and scattering wave are right-handed circular polarization are obtained by numerical implementation, the influence of the permittivity of substrate medium, the permittivity and the mean layer thickness of intermediate medium, the roughness surface parameters and the frequency of the incident wave on the bistatic scattering coefficient is discussed. The numerical results show that the influence of the permittivity of substrate medium, the permittivity and the mean layer thickness of intermediate medium, the roughness surface parameters and the frequency of the incident wave on the bistatic scattering coefficient is very complex.
研究了圆极化波入射层状介质粗糙表面的电磁散射,利用小摄动法推导了不同极化下的散射系数公式。提出了一种描述层状介质自然表面的高斯粗糙表面,推导了双稳态散射系数的计算公式。通过数值实现得到了入射波和散射波均为右旋圆偏振的双基地散射系数的角分布,讨论了基片介质的介电常数、中间介质的介电常数和平均层厚、表面粗糙度参数和入射波频率对双基地散射系数的影响。数值结果表明,衬底介质的介电常数、中间介质的介电常数和平均层厚、表面粗糙度参数和入射波频率对双基地散射系数的影响是非常复杂的。
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引用次数: 1
The analysis and measurement of FSS radome for antenna RCS reduction FSS天线罩降低天线RCS的分析与测量
Pub Date : 2013-07-21 DOI: 10.1109/CSQRWC.2013.6657413
Wenming Tian, X. Hou, Yongxing Che
This paper investigates the application of bandpass FSS radome with an enclosed antenna to reduce its backward RCS outside of its operating band. A planar array antenna covered with FSS radome is designed and constructed. In order to study the effects of a dielectric embedded FSS on an enclosed antenna pattern, we adopt the ray tracing technique to compute the near field pattern of the antenna-FSS configuration, from which the transmission coefficient and the far field patterns can be calculated. The results show that the backward RCS of antenna array with FSS radome has dramatically reduced than the common antenna array at out of operating band.
本文研究了封闭天线带通FSS天线罩在降低其工作频带外的反向RCS方面的应用。设计并构造了一种覆盖FSS天线罩的平面阵列天线。为了研究电介质嵌入FSS对封闭天线方向图的影响,我们采用射线追迹技术计算天线-FSS结构的近场方向图,由此计算出传输系数和远场方向图。结果表明,在非工作频带时,FSS天线罩天线阵列的后向RCS比普通天线阵列显著降低。
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引用次数: 6
期刊
2013 Cross Strait Quad-Regional Radio Science and Wireless Technology Conference
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