查询词典 antennas

Antennas for shortwave communication are normally very large sometimes covering hundreds of feet or meters in length.

天线为短波通信通常是非常大有时包括的上百脚或米在长度。

A balun may be used for single-ended antennas.

平衡- 不平衡变压器也许被使用为single-ended 天线。

Finally, applying the current basis function of three-term sinusoidal expansion, the radiation characteristic and input impedance of the vertical and horizontal antennas above lossy ground are analyzed by the method of moments with the variation of frequency, height from the ground and ground parameters.

最后，用矩量法，采用正弦插值基函数，研究地面上方垂直、水平线天线的辐射特性和输入阻抗随着频率、离地高度、地面参数等变化的情况。

Firstly, the directional beam of smart antennas worsens the hidden terminal, and it even introduces new problem of node deafness.

在MAC协议研究中，引入智能天线和功率控制技术后，有助于减小信号干扰，改善链路的传输质量，从而显著改善MAC协议性能。

All the antennas are controlled from headquarters at the Array Operations Center in Socorro, New Mexico.

所有这些天线，都由新墨西哥州索科罗的阵列控制中心来进行控制。

A simple coded modulation technique, which is called "split-phase coded modulation", is studied in this thesis. Such a technique is especially suitable to be applied in a multi-antenna system. To have an insight into the possible transmit diversity benefits to the proposed scheme, here we consider the employment of multiple transmit antennas and a single receive antenna for the considered system.

本论文探讨一个简单的编码调变技术，我们称为「相位分离编码调变」，此编码调变技术特别适用於多天线系统，为了进一步了解这样的架构在「传送分集」上所造成可能的效益，在此论文中，我们假设传输端布署多重天线，但在接收端仅使用单一天线接收。

People equate antennas with wireless transmissions and when they don't see it, they think it's subpar.

人民等同天线与无线传输，当他们没有看到，他们认为这是51.3 。

The number of simultaneously supportable users with BD-GMD is limited by the number of transmit and receive antennas.

但是，在BD-GMD方案中，发射和接收天线的数量限制了能同时通信的用户数。

The number of simultaneously supportable users 1with BD-GMD is limited by the number of transmitting and receiving antennas.

但是，在BD-GMD方案中，发射和接收天线的数量限制了能同时通信的用户数。

To obtain the RCS of dipole-array antennas, the system of electric field integral equations is turned into a linear algebra system whose coefficient matrix is a symmetric block Toeplitz complex matrix by using Calerkin method with pulse basis functions.

为计算线天线阵列的雷达散射截面，用脉冲函数为基函数的Galerkin法将线天线阵列的电场积分方程组转化为一个线性方程组，其系数矩阵是一个对称的二重复Toeplitz矩阵。

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