查询词典 antennas

Antennas are now lighter and less expensive and can be installed on everything from a Jumbo 747 to a regional jet.

如今，天线的重量更轻，价格下降，并能装载到从大到庞大的波音747，小到域内飞行的喷气机上。

In this paper, broadband and dual-polarized planar microstrip array antennas in Ku band are studied.

本文的主要工作是Ku波段的宽带双极化微带平面阵天线的研究。

The present invention relates a method and apparatus for receiving signal in MIMO CDMA system, charactered in that: on transmitting side, transmit signal by at least two antennas; on receiving side, receive at least one antenna, and obtaining channel paraneters by estimation of channel, using the channel parenters and maximum likelihood principle into MIMO+CDMA system, solving the problem of receiving signal in multiple mobile environment in effect.

本发明为一种基于MIM0 CDMA的接收方法及装置，其特征在于，发射端：至少采用两个发射天线发射信号；接收端：至少采用一个接收天线接收发射天线发射的信号，并且通过对信道的估计获得信道参数，采用该信道参数和最大似然原理的步骤得到输出信号。本发明将ML原理应用于MIMO+CDMA系统中。

The company has leading products: 1 W, 10W, 40W broadband microwave power amplifiers ,2-18 GHz microwave broadband hybrid integrated amplifier, 6-18GHz microwave broadband hybrid integrated amplifier, broadband low-noise amplifier, millimeter-wave power amplifiers, high-speed high-power microwave switch , Multi-channel switch filters, multi-channel receiver components, microwave, millimeter wave components RT ,1-18 GHz broadband limiter, broadband, such as ultra-wideband microwave antennas, of which 1 W has established mass production of microwave power amplifiers, 40 W microwave power Amplifiers ,2-18 GHz broadband hybrid integrated microwave power amplifiers, and other domestic fill the gaps, for the military plant, provided by the various military microwave devices and micro-electronic devices, for the modernization of national defense have made contributions to the building, the company also created a good Economic and social benefits.

公司的主导产品已有：1W、10W、40W宽带微波功率放大器、2-18GHz微波宽带混合集成放大器、 6-18GHz微波宽带混合集成放大器、宽带低噪声放大器、毫米波功率放大器、高速大功率微波开关、多通道开关滤波器、多通道接收组件、微波、毫米波R-T组件、1-18GHz宽带限幅器、宽带、超宽带微波天线等，其中1W微波功率放大器已定型批量生产，40W微波功率放大器、2-18GHz宽带混合集成微波功率放大器等填补了国内空白，为军工厂、所提供了各种军用微波器件和微电子器件，为国防现代化建设做出了贡献，也为公司创造了良好的经济效益和社会效益。

The basic principle for the layout of GPR survey line was summarized on the three basic operation modes,i.e.,reflection mode,common mid point mode and transillumination mode,and the basic principles for the choice of GPR field operation parameters were introduced,which included the center frequency of antenna,the maximum time window,the spatial and temporal sampling intervals,and the separation 'between' the transmitting and receiving antennas.

概括了探地雷达野外工作的基本方法，介绍了探地雷达现场工作测线布置的基本原则，并总结了探地雷达野外测量时工作参数的选择原则。这些工作参数包括工作天线主频、采样时间窗的大小、空间采样步长、时间采样间隔、天线距大小。

This geometry, which has been used to model complex objects found in nature such as clouds and coastlines, has space-filling properties that can be utilized to miniaturize antennas.

这样的图形构成方式已经被用来塑造描述在大自然中存在的一些复杂的物体，例如天空中的云以及海岸线的轮廓等等。

This invention relates to MIMO test method in a multi-user MIMO radio communication system including: estimating the channel matrixes of all users at the base station, computing an orthogonal projecting matrix M of the interference matrix of each user and transmitting M to each user periodically, receiving data sent by the base station at the user end and getting the orthogonal projecting matrix M from the received data, transforming the MIMO test of a desired user to the minimum value of a K-element secondary convex function, in which, K expresses the number of sending antennas and getting estimation of the test data by a ball test method.

一种多用户多输入多输出无线通信系统中的MIMO检测方法，包括步骤：在基站估计所有用户的信道矩阵；计算每个用户的干扰用户矩阵的正交投影矩阵M，并将每个用户的正交投影矩阵M定期发送给每个用户；在用户端接收基站发送的数据，并从接收的数据中得到正交投影矩阵M；利用正交投影矩阵M将期望用户的MIMO检测转化为K元二次凸函数的极小值，其中K表示对期望用户而言，发送天线的个数；利用球检测的方法，得到检测数据的估计。

The coupling of linear antennas parallel to the minor axis in a elliptic waveguide are discussed by means of dyadic Green s function and reaction principle.

采用并矢格林函数和反应原理，讨论了椭圆波导中平行于短轴的线天线的互耦合。

The mutual coupling effects between the BS diversity antennas are analyzed using the Method of Moments in this thesis.

本文采用矩量法分析了基站分集天线间的相互耦合影响。

Scientists believe antennas are critical to the navigation of the Monarch butterfly.

科学家认为，天线是至关重要的君主蝴蝶导航。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。