饱和器

Study on Magnetostrictive Material of Fe-Ga Alloy Abstract In application of numerous sensors and actuators, the study of giant magnetos...

在声纳换能器和传感器技术应用领域，具有大的磁致伸缩应变系数、低的饱和磁化场、高的机械强度的磁致伸缩材料的研究一直受到人们的关注。

We have prepared a series of low saturation magnetization Ti-substituted Li ferrites used in S-band phase shifters.

采用常规的氧化物法制备了用于S波段移相器的低饱和磁化强度锂铁氧体材料。

It possesses the advantages such as small volume , wide transmission belt of frequency , no saturation problem and without harmonic vibration point etc.

采用电阻分压器来替代电磁式电压互感器，可将初级电压直接转化为10 V 以内的微信号，具有体积小、传输频带宽、不存在饱和问题、无谐振点等优点。

In the last new years , as the demands of wireless communication system grows rapidly , the bands of microwave frequency had been saturated with various communication applications . To achieve wider spectrum for high-speed and high-capacity transmission , bands of millimeter-wave frequency are the solution of this problem . The advantage of MMW wireless communication systems is wider bandwidth comparing with microwave communication systems . To utilize the spectrum efficiently , many methods of complexly digital modulation is proposed . The more complex modulation , the higher linearity is required , and more various phase of signals are required to accomplish process of modulation . Therefore high-linearity and quadrature-phase modulator and demodulator are the emphasis of this thesis . For high level of integration , high performance and low cost , this chip is fabricated by the complementary oxide semi-conductor 0.13um process . A compact size of direct down-conversion and direct up conversion circuits will be presented in this thesis .

近年来随著无线通讯产业的蓬勃发展，微波频带已经趋近於饱和，为了追求更宽的频谱来达到更快传输速率及高资料容量的传输，宽频的毫米波频段提供了解决此问题的途径，毫米波无线通讯系统提供了相对於微波通讯系统宽频的优点，且为了更有效的使用频谱，各种不同且复杂的数位调变方式及方法被发表出来，越复杂的调变方式其所需的线性度越高，且需要更多不同的相位讯号来完成调变的过程，因此高线性度及四相位的调变及解调器将是此篇论文的研究重点，为了达到高整合性，高效能，及低成本的电路设计，我门利用互补式金氧半导体制程来完成此电路设计，因此一小面积的直接降频(Direct down-conversion)及直接升频(direct up-conversion)电路将在文中介绍。

The mechanics of the FCL is analyzed based on a three-line ψ-i curve model of the iron cores.

在此基础上，提出了饱和铁芯型限流器的一种设计方法。

The medicinal plant resources of Gentianaceae in Sichuan Province.

四川省龙胆科药用植物资源。

"Some fortuneteller," scoffed the man, I'm the father of THREE children.

" "一些算命"，嘲笑他，"我的父亲有三个孩子。