查询词典 indoor antenna

Feeding patterns of antenna array are researched and feeding network is designed. Three-unit and four-unit models for the cylindrically conformal microstrip antenna array are set up and their directivities are simulated respectively. Through the comparison of the simulation results, the four-unit array is proved to be feasible.

对天线阵列的馈电方式进行了研究，设计了天线阵列的馈电网络，建立了三单元和四单元柱面共形微带天线阵列模型，对方向性分别进行了仿真分析，比较仿真结果，选用了满足工程需要的四单元阵列。

Different antenna frequency have different using, underground utilities or dewater box can use antenna frequency 100 MHz with 250 MHz.

4不同天线频率有其适用性，地下管线及箱涵可搭配天线频率100 MHz和250 MHz相互使用。

This paper chooses a normal mode helical antenna to replace the short dipole antenna to improve efficiency.

本文采用法向模螺旋天线代替以前采用的短偶极子天线以提高效率。

With the narrow bandwidth of microstrip antenna, a microstrip antenna with the substrates of double negative media is designed by the software HFSS which is based on finite element method.

针对微带天线带宽较窄的问题，采用基于有限元法的HFSS软件，设计1种以双负材料为衬底的微带天线。

Antenna mutual coupling is considered and the general coupling coefficients matrix from the equivalent network model of the multiple-antenna is obtained.

考虑多天线间互耦，建立了多天线系统等效网络模型，导出通用耦合系数矩阵。

In this paper the effects of scanning truncation error, scanning position error, random amplitude and phase error, and multiple-reflection error in near-field antenna measurement are analyzed; error equations and the uncertainty of measurement are obtained through computer simulation; compensated techniques for reducing the effects of measurement errors in near-field antenna measurement are presented and the formula and arithmetic of phaseless near-field techniques are derived.

本文从解析法和数值仿真两个角度深入分析口面天线近场测量中扫描面截断误差、扫描面位置误差、随机幅相误差、多次反射误差等误差源对天线远场特性测量精度的影响，一方面从理论上给出相应的误差方程，另一方面建立误差分析模型，通过计算机模拟，得到不同误差条件下测量结果的不确定度，并介绍了减小这些误差的修正方法，推导无相位近场测量的公式和算法。

On the basis of studying law of Farad Electromagnetic Induction and the antenna theories in electrodynamics,We can improve the device — semi-wavelength antenna —which is used for receiving electromagnetic waves and apply it to Farad Electromagnetic Induction Experiment.

在研究法拉第电磁感应定律和电动力学中有关天线理论的基础上，将电磁波的接收装置—半波天线加以改进，应用到法拉第电磁感应实验中去，即能方便直观地验证法拉第电磁感应定律，也能形象地诠释麦克斯韦方程的物理意义。

Based on the project of Cruise Antenna for Receiving DBS Video Signal, we analyze and design the foreside antenna and the circuit of comparing intensity of signal received f...

本文结合"DBS数字卫星广播移动接收天线"项目，对其前端天线进行了研究与实现，并对天线在载体移动过程中寻星和锁定卫星的关键电路—接收信号幅度比较器进行了研制。

Design the foreside antenna with ring-focus array antenna within no more than 7.8cm* VOcm* 88cm.

这种环焦阵列天线不仅可以克服初级馈源喇叭所引起的遮挡大于副镜所造成的次级遮挡的缺点。

Based on the project of Cruise Antenna for Receiving DBS Video Signal, we analyze and design the foreside antenna and the circuit of comparing intensity of signal received from DBS satellite in this paper.The project has the great achievements as below.?

本文结合"DBS数字卫星广播移动接收天线"项目，对其前端天线进行了研究与实现，并对天线在载体移动过程中寻星和锁定卫星的关键电路—接收信号幅度比较器进行了研制。

Listen,point and check your answers.

听，指出并且检查你的答案。

Warming needle is one of effective treatment methods for knee arthralgia aggravated by cold,and it is simple,safety,so it should be developed in clinical acupuncture and moxibustion extensively.

但以本院科针灸门诊在2005年1月—2006年6月期间共收治膝痛患者100余例，经过临床的诊断后，其中施以温针治疗的48例，疗效显著，报道如下。1临床资料本组病例48