多工器

For example, IEEE 802.16e supports vehicle speed up to 120 km/hour, and IEEE 802.20 supports vehicle speed up to 250 km/hour. OFDM systems can be used efficiently in time invariant environments with one-tap equalizers. However, subcarriers are no longer orthogonal to each other in time-varying channels, and this causes the intercarrier interference and degrades the system performance.

传统的正交分频多工系统可以有效率地使用在非时变通道中，且仅需简单的等化器，即可修正通道效应，但在移动的环境中，通道随著时间改变，使得接收端的子载波失去正交性，因而导致子载波之间的相互干扰，使得解调变后的效能降低。

For example, IEEE 802.16-2005 supports vehicle speed up to 120 km/hour. OFDM systems can be used efficiently in time invariant environments with one-tap equalizers. However, subcarriers are no longer orthogonal to each other in time-varying channels, and this causes the intercarrier interference and degrades the system performance.

传统的正交分频多工系统可以有效率地使用在非时变通道中，且仅需简单的等化器，即可修正通道效应，但在移动的环境中，通道随著时间改变，使得接收端的子载波失去正交性，因而导致子载波之间的相互干扰，使得解调变后的效能降低。

A H-plane waveguide duplexer is analysized with a multi-mode microwave network method in this paper.

摘要该文用多模微波网络的方法来分析波导频率双工器。

Thus, we can apply the very algorithm to make their numerical analysis much quickly and precisely. We will take the following two devices, the multiple branch rectangular waveguide directional coupler and the H-plane T-junction duplexer, as examples, systematically analyze and discuss the "Network segment and de-segment algorithm" presented and GA application in the computer aided design of complex microwave structures.

本论文将以矩形波导分支电桥耦合器和H面T型接头双工器的优化设计为例，比较系统地分析讨论将&多模网络分解—重组算法&和遗传算法应用于微波电路器件CAD的理论、算法和计算技术问题，并给出主要的器件性能特性曲线，以全面报告我们研究工作的心得体会和研究成果。

Ltd, which was founded in 2002, designs and manufactures a series of passive devices, such as filters, duplexers, couplings and multi-frequency band mixers in communication frequency bands of DCS, GSM, CDMA and 3G.

南京震宇通信技术有限公司成立于2002年，创业以来，公司先后在DCS、GSM、CDMA、3G通信频段内设计生产了一系列滤波器、双工器、耦合器、多频合路器等无源器件。

Miner , in 1903, used an electro-mechanical commutator for time-division multiplex of multiple telegraph signals, and also applied this technology to telephony.

Miner 使用一种电力驱动的机械交换器真正达成分时多工，让一条线负载许多电报讯号，并将其应用於电话机上。

In this work, novel E-plane filters and diplexers based on cross-coupled resonators or over-moded cavities are analysed and designed.

本文将分析和设计基于交叉耦合和多模腔的E面滤波器和双工器。

Finally, new, compact millimeter-wave diplexers which employ cross-coupled E-plane filters and E-plane filters with over-moded cavities are analysed.

最后，设计了使用E面交叉耦合滤波器和E面多模腔滤波器的构成的紧凑结构毫米波双工器。

As the field of microwave communications professional manufacturer of passive components, Bo Xiang Electronics since its inception is committed to research and development, production and marketing of power splitter, coupler, Combiner, diplexers, filters, power load, such as small and medium-sized 6 Series more than 100 kinds of products, widely used in GSM, CDMA, PHS and other communications networks a variety of distribution systems to low-loss, wideband, high reliability, waterproof dust characterized, its production, processing capability, stable performance , delivered quickly and cost-effective, at present is the biggest kind of passive components, one of professional supplier in 2005, output value of more than 6000 million.

作为微波通信领域的无源器件专业制造商，博翔电子自成立以来致力于研发、生产和销售功分器、耦合器、合路器、双工器、滤波器、中小功率负载等6个系列100多种产品，广泛应用于GSM、CDMA、小灵通等通讯网络的各种分布系统中，以低损耗、宽频带、高可靠性、防水防尘为特点，其生产、加工能力强、性能稳定、交付迅速、性价比高，目前是国内该类无源器件最大的专业供应商之一，2005年产值6000多万元。

A series of microwave filters and diplexers are designed by optimization and fabricated based on HFSS and the programs written by myself.A combline SIR cross-coupled filter is designed by HFSS. Cha.5 presented the design of dual-band bandpass filter and corner diplexer.

第六章利用自编程序设计了几种较为新颖的基片集成波导滤波器，其中包括多频带阻滤波器、交叉耦合吸收式滤波器和带Triplet拓扑的广义切比雪夫平面双工器。

Cynanchum Lingtai apricot production in the average weight 65 grams, the brightly-colored fruit, juicy rich, sweet-sour taste, sweet from the nucleolus, when the late Qing Dynasty famous Shaanxi, Gansu provinces, the Qing imperial court Tongzhi tribute for years.

灵台生产的牛心杏平均单果重65克，果实色泽鲜艳，汁多味浓，甜酸适口，离核仁甜，清末时就驰名陕、甘两省，清同治年间曾为朝廷贡品。

Chenopodium album,Solanum nigrum, and Amaranthus retroflexus were very susceptible to the herbicides. Polygonum persicaria and Abutilon theophrasti were relatively less susceptible to the herbicides, and Lycopersicon esculentum was not susceptible to it. The relationship between reduction rates of weed biomass and PPM values of weed leaves 2,4, and 6 days after treatment was established.

供试的6种杂草对该混剂的敏感性存在显著差异：红心藜Chenopodium album、龙葵Solanum nigrum和反枝苋Amaranthus retroflexus对该混剂最敏感，ED90值分别为47.65、71.67和29.17g/hm2；春蓼Polygonum persicaria和苘麻Abutilon theophrasti敏感，ED90值分别为96.91、114.20g/hm2；而番茄不敏感。