نتایج جستجو برای: سوئیچ mems
تعداد نتایج: 9668 فیلتر نتایج به سال:
This paper presents complete behavioral analysis of a surface micro-machined MEMS varactor for frequency tuning application in voltage controlled oscillators in RF applications with high Quality factor and tunability. The dimensions of the MEMS device have been optimized with Finite Element Method based CoventorWare analysis and verified through lumped parameter analysis in Saber platform. The ...
رشد روز افزون به کارگیری سیستم های فرکانس بالا، نیاز به مدارها و سیستم های کم هزینه تر و کوچک تر با مشخصات فرکانس بالای بهتر را بیشتر کرده است. سوئیچ های میکروالکترومکانیکی، یکی از انواع سوئیچ های فرکانس بالا هستند که در سال های اخیر به دلیل ویژگی های فرکانس بالای بهینه از جمله ایزولاسیون بالا، تلفات کم، خطی بودن، قابلیت ساخت با حجم و هزینه کم و قابلیت مجتمع شدن با تکنولوژی ارزان قیمت cmos، در ...
Modelling MEMS involves a variety of software tools that deal with the analysis of complex geometrical structures and the assessment of various interactions among different energy domains and components. Moreover, the MEMS market is growing very fast, but surprisingly, there is a paucity of modelling and simulation methodology for precise performance verification of MEMS products in the nonline...
This paper reviews mass spectrometers based on micro-electro-mechanical systems (MEMS) technology. The MEMS approach to integration is first briefly described, and the difficulties of miniaturizing mass spectrometers are outlined. MEMS components for ionization and mass filtering are then reviewed, together with additional components for ion detection, vacuum pressure measurement and pumping. M...
Cost and space constraints are currently driving manufacturers of Mobile Mapping Systems (MMS) and location based services to investigate and develop next generation of low cost and small size navigation systems to meet the fast growing mobile mapping and location services market demands. Advances in Micro-Electro-Mechanical Systems (MEMS) technology have shown promising light towards the devel...
A knowledge-based computer-aided design tool for microelectromechanical systems (MEMS) design synthesis called case-based synthesis of MEMS (CaSyn-MEMS) has been developed. MEMS-based technologies have the potential to revolutionize many consumer products and to create new market opportunities in areas such as biotechnology, aerospace, and data communications. However, the commercialization of ...
The expending development of wireless communication requires strong demands for components with improved capabilities. RF MEMS devices offer a variable alternative to conventional communication components because they consume less DC power, have lower losses, higher linearity and higher Q factor. However, the commercialization of RF MEMS devices is hindered by technological issues such as their...
Modern microwave and millimeter wave phased array antennas are attractive because of their ability to steer wave beams in space without physically moving the antenna element. A typical phased array antenna may have several thousand elements fed by a phase shifter for every antenna, which can steer the resulting array beam to different directions. Their low loss, low cost and lightweight phase s...
پیشرفت های صورت گرفته در زمینه پزشکی محققان را به این سو رهنمون کرده است که با دریافت سیگنالهای عصبی و پردازش آن می توان اکثر بیماری ها را تشخیص و در درمان آنها اقدام نمود. از آنجا که سیگنالهای عصبی به شکل آنالوگ بوده و در پردازش، بیشتر از شکل دیجیتال سیگنال استفاده می شود ضرورت طراحی مبدل آنالوگ به دیجیتال در کاربردهای پزشکی نیز احساس می شود. در این پایان نامه یک مبدل آنالوگ به دیجیتال خط لو...
We propose a tuning method for MEMS gyroscopes based on evolutionary computation to efficiently increase the sensitivity of MEMS gyroscopes through tuning. The tuning method was tested for the second generation JPL/Boeing Post-resonator MEMS gyroscope using the measurement of the frequency response of the MEMS device in open-loop operation We also report on the development of a hardware platfor...
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