查询词典 oscillator

In this dissertation, A Ka band multiplier chain is developed, which can be used for local oscillator.

在无源电路部分，我们首先对微带线、耦合线等基本理论作了简单的介绍。

We use an oscillator and a band pass filter to design a simple but practically distortion surveyor here.

这里以文氏桥振荡器和双T带阻滤波器实现简单实用的失真度计的设计。

The system consists of radio frequency band pass filter, local oscillator and sub-harmonic mixer.

文中对构成电路的鳍线及其不连续性和构成系统的三个部分分别做了研究。

A radio over fiber system to generate optical millimeter wave with four time frequency of the local oscillator frequency using two-cascaded intensity modulators based on optical carrier suppression scheme was investigated numerically and experimentally.

研究了一种采用两个级联外部调制器基于光载波抑制原理产生四倍频毫米波的光纤无线通信系统。

In order to study the characteristics of pulse amplification in multi-stage cascade ytterbium-doped fiber amplifiers,the three-stage high-gain pulse fiber amplifier with all-fiber structure was experimentally studied based on the master oscillator power amplifier technology.

为了探讨多级级联掺镱光纤放大器的脉冲放大特性，采用主振功率放大技术，实验研究了3级级联、全光纤结构的高增益脉冲激光放大器。

Aiming to the problems existing in the applications of clocks received via global position systemreceiver or generated by crystal oscillator ,clock error models are respectively established.

针对全球定位系统接收机输出时钟和晶振时钟在实际应用中存在的问题，建立了相应的误差模型，在误差估计的基础上，提出了一种全新的高精度同步时钟产生方法。

There are three parts included. The first part is the prepositive-amplifier, it gets broadband high gain and flat frequency response. The second part is the U band quadrupler, which composed of two doublers using a PHEMT chip HMMC-5040, a Schottky diode of DMK-2790, a HMMC-5040 amplifier, and a fin-line transitional stage. Maximum output power higher than 60mW is obtained in V band. The third part is a 2nd harmonic gunn oscillator injection locked by the Fundamental Wave,which get about 2GHz locked bandwidth in W band.

电路主要由三部分组成，第一部分为采用HMMC-5618设计的前置放大器，实现了宽带高增益和平坦的频率响应；第二部分为设计的主体，由HMMC-5040设计的二倍频器、DMK-2790设计的二倍频器、HMMC-5040设计的放大器及鳍线过渡段组成的U波段四倍频器，在U波段实现了最高60mW以上的输出功率；第三部分为基波注入锁定谐波Gunn振荡器，在W波段实现了近2GHz锁定带宽。

Similar to other kind of communication systems, the radio frequency modular of RSU in DSRC include many parts such ad antenna, duplexer, low noise amplifier, local oscillator, mixer, filter, modulator, demodulator, and so on. It's difficult to analyze every part in the system fully, so the emphasis is mainly on the parts designed and implemented for the RSU by myself.

和其它通信系统类似，专用短程通信系统路边单元的射频部分包含天线、双工滤波器、低噪声放大器、混频器、本振、滤波器、调制解调器等多个功能模块，论文中要完整地介绍和分析每一个功能模块是困难的，因此本文主要介绍自己亲自完成的部分。

Four new microwave devices revolutionized radar; the British Magnetron (optimized and fanned out into a family by BTL/Western Electric), the American gas discharge duplexer transmit-receive T-R switch tube, the American advanced semiconductor mixer diode (MIT Rad Lab and BTL/WE), and the American klystron local-oscillator tube.

四种新型的微波装置掀起了雷达发展的革M：英国磁控管（为贝尔电话实验室和Western Electric所改良并发展成为一个大家族），美国的气态双工收发转换开关，美国的先进半导体二极管混频器(MIT 电子实验室和 BTL/WE)和美国的可调速本机振荡管。

Based on the ring-shaped laser-diode array side-pumped Nd:YLF high gain amplifier and the conventional plan-concave resonator, a simple structure single-longitudinal-mode single-pulse Q-switched oscillator is demonstrated by taking advantages of mode-selecting property of passive Q-switches (Cr4+:YAG crystal) and etalons (formed by two end of uncoated Nd:YLF rod).

以激光二极管环形阵列侧面抽运Nd：YLF棒高增益放大器模块为基础，在经典的平凹驻波腔中加入一片Cr4+：YAG晶体作为被动Q开关，利用被动Q开关本身所具有的振荡选模功能以及两端不镀膜的Nd：YLF棒所具有的标准具效应，简便地实现了稳定的单脉冲、单纵模调Q输出。

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。