Yet research shows consumers also dislike the hassle of external whip antennas, or having to always carry headsets ( which serve as an FM antenna wire). 然而研究显示消费者也不喜欢玩的时候外部鞭子天线,或不得不总是随身带着耳机(FM天线作为线)。
As the product of the intersecting of the fractal geometry and antenna technology, fractal-shaped wire antennas can increase the working band and reduce the size. 作为分形几何和天线技术交叉的产物,分形天线振子能够增加天线的工作频带、减小天线尺寸。
The recent progress and trend of antenna technology faced to the 21 th century are briefly reviewed in this article, according to three loci of wire antennas, aperture antennas, and array antennas respectively. 文中就线天线、面天线、阵列天线三条发展轨迹,介绍和评述天线技术面临廿世纪/廿一世纪之交的发展状况和趋势。
High power pulse radiation antenna with wire frame TEM horn feedback paraboloid 线框馈电抛物反射面高功率电磁脉冲辐射天线
An antenna was developed to radiate high power, sub nanosecond EM pulse, which consists of a high power wideband mode convertor, a wire frame TEM horn feedback set and a parabolic reflector. 研制了一种由高功率宽带模式转换结构、导电线框TEM喇叭馈电结构及抛物反射面构成的天线,用其辐射高功率亚纳秒电磁脉冲。
On antenna with quasi 1-D quantum wire array structure 准一维量子线阵列天线研究
The article introduces some ways of repair, analyse of maintain and also common breakdown of the antenna wire and feed line of the microwave station based on the conclusion of maintain and repair system. 在总结修理、维护实践的基础上,介绍了微波站天线、馈线系统常见故障,以及故障的分析、检修方法。
Firstly, the coordinates of suspension points on the side rope sling can be obtained in two-dimensional plane by the suspended-cable equations, and their ordinates are corrected by the moment equations, then the lengths of antenna wire segments are determined. 在二维平面内应用悬垂线方程式计算边吊索上各悬挂点的坐标,应用力矩公式修正以上计算结果,确定各振子线的长度。
In order to analyze the shorting pin and the probe feed of a microstrip antenna using FDTD method, an approach is presented by integrating a one-dimensional transmission line model and a thin wire model. 给出了一种FDTD法分析短路探针加载同轴馈电的微带天线。该方法利用一维传输线模型描述同轴线部分;
The Principle and Test Analysis of Impedance Convertor in the System of Antenna and Feed Wire 天馈线系统中阻抗变换器的原理和测试分析
The Characteristic impedance and attenuation characteristic calculation of the antenna tuner for wire antennas are derived in this paper. And some analysis methods are given. 本文导出线天线的天线调谐器的特性阻抗和衰减特性的计算,并对其进行了分析。
The magnetic current frill excitation model is introduced to simulate the feed structure, thereafter, the properties of coaxially fed microstrip antenna are calculated with additional mode basis functions being introduced to simulate the current distribution at the wire/ patch junction. 最后结合磁流环模型,采用附加模基函数模拟线面结合处的电流分布,计算了同轴线馈电的微带天线的电性能。
The construction and circuit principle of automatic antenna, legth calculation of the rolling wire drawing, and the power analysis of overall load moment at the normal operation and the maximum moment during the moter braking are introduced. 介绍自动天线的结构及电路原理,计算卷曲拉线的长度,对正常运转时的总负载力矩及电动机堵转时的最大力矩进行动力分析。
Microstrip antennas feeding position determines the pattern of antenna radiated wave and the matching of antenna and feeding wire. 微带天线馈点的位置决定天线辐射波的模式和天线与馈线的匹配情况。
Antenna Radiation Pattern Measurement Using Near-Field Wire Scattering Technique 应用近场线散射技术测量天线辐射方向图
The Breakdown and Repair for the System of Antenna Wire and Feed Line of the Microwave Station 微波站天馈线系统的故障与维检
With the development of network and Community antenna television, and the popularization of Subscription Television, it is becoming so important to provide Uninterruptable Power Supply for them, and we need more and more wire network special power supply. 随着我国网络通信、有线电视的发展及收费电视的普遍,保证这些设备的不间断供电就显得意义重大,所需的有线网络专用电源日益增多。
By adopting an analysis model close to the actual sleeve monopole antenna, a new efficient and accurate modeling for moderately thick cylindrical wire antennas, the accuracy is greatly improved. 采用与实际天线较为接近的矩量法分析模型和一种新的粗圆柱线天线快速精确计算模型,大大提高了分析计算的精度;
Attenuation Characteristic of the Antenna Tuner for Wire Antennas 线天线的天线调谐器衰减特性
The antenna approximated with wire grid is analyzed with Method of Moment and synthesized using Genetic Algorithm to realize expected pattern. 采用矩量法对天线模型进行分析,并采用遗传算法对阵列的结构、各阵元位置及激励相位等参数进行了优化。通过这两种方法的结合应用,综合出了期望的方向图。
The simulation results show that the antenna performance has been greatly improved after the use of arcs instead of serrated. 3. Through adding metal wire and loading slot, the miniaturization and dual-band were achieved. 仿真表明,利用圆弧代替锯齿之后,天线的性能得到很大的提高。3.通过添加金属线和缝隙加载实现了天线的小型化和双频工作。
In order to improve product qualification rates and saving cost, the antenna was installed in the circuit board directly instead of the enameled wire. 为了提高产品合格率和节约成本,放弃了使用漆包线作为天线的方案,而是将天线直接布在电路板上。
Based on the Hallen method and antenna theory, the equivalent principle of wire model, and the reasons for its increasing error at high frequency were researched. 根据Hallen方法和天线理论,研究了线模型的等效依据及其计算偏差随频率增大而增大的原因。