查询词典 in-line antenna

Based on these theories, this paper discusses the method of the design of the low noise amplifier integrated active microstrip patch antenna, which considers the low noise amplifier and the microstrip antenna and takes both mutual matching into account. The size of the active integrated antenna and the circuit configuration of the low noise amplifier are obtained at the specified operation frequency.

根据这些理论，把低噪声放大器和微带天线结合起来，并考虑两者之间的匹配，讨论了一种集成低噪声放大器的有源微带贴片天线的设计，得到了在给定工作频率下的有源集成天线尺寸和低噪声放大器的电路结构。

Was founded Tyrone and in 1998, fixed assets 18 million, building the production area of 30,800 square meters, is a new professional development, production and marketing of satellite communication and mobile communication antenna technology-intensive enterprises, Products widely used in satellite communications and radio and television field, has an excellent cost-effective to receive the trust of users, with the country in recent years on the antenna of the Product Quality Control,"North" antenna with a strong wind resistance, transportation convenience, and IMPREGNATION electrostatic process, with antiseptic, sunscreen, a more elegant features such as showing its powerful strength, the market brand, sales nationwide and exported to Europe, Oceania, the Middle East, Southeast Asia more than a dozen countries and regions.

廊坊兴泰隆通信器材有限公司始建与一九九八年，固定资产1800万，建筑生产面积30800平方米，是一家新兴专业研制、生产和销售卫星通信及移动通信天线的科技密集型企业，产品广泛用于卫星通信和广播电视领域，一直以优良的性价比得到广大的用户信赖，随着近年来国家对天线产品的质量控制，&中北&天线具有抗风能力强，运输方便，并采用静电浸塑工艺，具有防腐、防晒、美观大方等特点更显示出其强大实力，成为市场名牌，销售全国，并出口欧洲、大洋洲、中东、东南亚等十几个国家和地区。

deviation of the antenna radiation resistance seems larger in some textbooks about the electromagnetic theory for the editors have made some similar treatment when discussing the radiation power of short antenna.combining the concept of physical with mathematical tools and the precise results are gained,that is the real radiation resistance of electric dipole antenna is about ten times smaller than that of the approximate results in the actual literature by researching the electromagnetic field theory and average energy density.this offers evidence to grasp the radiated ability accurately.

小 摘要：在部分有关电磁场理论的教材中，编者讨论短天线的辐射功率时，由于作了某些近似处理而所得天线的辐射电阻值偏差较大。从天线辐射的电磁场理论和平均能流密度出发，使物理概念和数学工具相结合，运用矢量运算推导出精确的结果，即电偶极子天线的实际辐射电阻要比文献中的近似结果小数十倍，因而为准确把握天线的辐射能力提供了依据。

The single mode dipole antenna is designed by the dipole microstrip theory, and two single-band antennas are combined with the two switches, forming a dual-band antenna. The performance of switch and antenna are obtained by HFSS software simulation, respectively.

根据偶极子天线原理，设计了单模微带偶极子天线，使用开关结构将两个单模偶极子天线连接在一起，实现了双模天线的功能。

The system comprises first and second antennas for receiving first and second RF signals of first and second frequencies, respectively; a mobile switch for measuring performance characteristics of the second antenna; and a switch circuit connected between the second antenna and the mobile switch for controlling flow of the first RF signal to the second antenna.

在移动通信终端内，一开关电路，用于根据工作模式控制CDMA天线的输入阻抗，该开关电路被连接在CDMA天线和移动开关之间，以便在GPS工作模式下维持CDMA天线的输入阻抗为高阻抗，来切断GPS信号的流入，以及在CDMA工作模式下维持CDMA天线的输入阻抗为低阻抗以接收CDMA信号。

This new kind of smart antenna system has the advantages both of the smart antenna and the switched beam antenna, enlarges the system capacity and is easy to realize.

这种新的智能天线系统结合了两种天线系统的优点，最大限度的扩大了系统容量，而且易于实现。

Besides,muti-frequency of E-shaped antenna and lower back lobe of inverted F antenna are embodied by the antenna.

该天线兼备E形天线的多谐振特性和倒F型天线的低后瓣特性。

A new method based on E-shaped antenna and inverted F antenna is developed in order to meet requirement of 840~845 MHz and 920~925 MHz in China.The novel antenna is designed in this paper.

针对射频识别系统UHF频段的中国标准840~845 MHz和920~925 MHz，提出一种基于E形天线和共面倒F形天线相结合的设计方案，设计了一款新颖的双频微带天线。

They are mainly: the probe-fed square patch antenna with shorting pins,and the probe-fed rectangular patch antenna with a pair of wide slits (E-shaped patch). The analyses were carried out using method of moments software package. It is shown that the probe-fed square patch antenna can be made resonate at three different frequencies of 1.83 GHz,2.16 GHz and 2.74 GHz respect...

同时，采用基于MOM的软件包分析了天线性能，证明方形天线可以工作在3个频率点，即1.83GHz、2.16GHz和2.74GHz，其最大的增益达到9.4dB；E形天线工作在2.13GHz和2.5GHz，当中心频率为2.4GHz时，带宽达到33.33%(反射损耗≤-10dB)，其最大增益为9.25dB。

The printed UWB antenna is comprised of a planar monopole radiator and the ground plane which are connected to a coaxial cable to launch RF signals. This kind of ground and antenna system is essentially an unbalanced design, where electric currents are distributed on both radiator and ground plane, and then leakage to the outer conductor of the feeding cable. The impedance matching and radiation pattern will be influenced in the low band, which are our focus. Finally, some techniques will be proposed to reduce the cable effect on the antenna performance.

进行超宽频天线量测时，吾人会利用同轴缆线连接到网路分析仪，这时的同轴缆线不只是扮演一个传输讯号的工具而已，由於单极天线的不平衡结构，对低频而言，接地回流电流会泄漏到同轴接地的导体外部，造成同轴缆线也是一个辐射体，影响到天线低频时的阻抗匹配与辐射特性，因此本论文将探讨同轴缆线对於天线一些参数的影响，并研究提出解决的办法。

Article 144 The Government of the Hong Kong Special Administrative Region shall maintain the policy previously practised in Hong Kong in respect of subventions for non-governmental organizations in fields such as education, medicine and health, culture, art, recreation, sports, social welfare and social

第一百四十四条香港特别行政区政府保持原在香港实行的对教育、医疗卫生、文化、艺术、康乐、体育、社会福利、社会工作等方面的民间团体机构的资助政策。原在香港各资助机构任职的人员均可根据原有制度继续受聘。

Small wonder, then, that the Chinese spend more in the shop than any other group of foreign visitors do .

这样的小惊喜，使中国顾客比任何国家的人消费得更多。