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The radio frequency microelectromechanical systems (RF MEMS) based switch experiences pull-in instability due to electrostatic actuation mechanism. The switch actuating element is thin parallel plate capacitor electrodes separated by air gap and dielectric material. This paper simulates the RF MEMS switch in MATLAB software to evaluate its performance in terms of pull-in voltage and displacement at...
This paper deals with the project execution experience of ITER-India, the agency for delivery of India's ‘inkind’ contributions to ITER. We look at the changes that have occurred so far and are being incorporated during the construction or manufacturing of the systems in some of the packages. As these systems are linked through the interfaces with other systems (beyond the scope of ITER-India), one...
In this paper, an efficient design method of nearly perfect reconstruction cosine modulated transmultiplexer (CM TMUX) is presented for the prescribed stopband attenuation (AS), passband attenuation (AP), and roll off factor (RF). The method employs the weighted constrained least squares (WCLS) technique for the design of a prototype filter for CM TMUX. Here, the cut-off frequency is iteratively varied...
We demonstrate advanced modeling and optimization of 32nm high-K metal gate (HKMG) SOI CMOS technology for high-speed digital and RF/analog system-on-chip applications. To enable high-performance RF/analog circuit design, we present challenging device modeling features and their enhancements. At nominal Lpoly, floating-body NFET and PFET demonstrate peak fT of 300GHz and fMAX of higher than 350GHz...
In this work, the graded channel concept has been introduced into a fully-depleted 0.15 μm SOI CMOS technology through a commercial industrial fabrication process in order to improve the RF noise performance of deep submicron scale devices. The benefits of using a graded channel transistor are explicit. An improved minimum noise figure is achieved while relaxing the minimum feature size to, at least,...
The superior performance of Graded-Channel MOSFET over classical MOSFET transistors is demonstrated to extend to down scaled channel lengths. While keeping a normal down scaling trend, Graded-Channel devices continue to show favoured static and analog performances in comparison to classical devices. Graded-Channel devices are also characterized in high temperature and high frequency regimes of operation.
This paper presents an RF MEMS capacitive switch using nanocrystalline diamond as the dielectric. The switch is electro-statically actuated and small signal measurements are presented in the frequency range of 1-65 GHz. The measured insertion loss in the up-state is ~ 1.1 dB at ~50 GHz with 30 dB isolation in the off-state. Dielectric characterization was performed using the Corona-Kelvin technique...
Advances in indoor short-range wireless communication technology and the proliferation of lightweight handheld devices with built-in high-speed radio access have made wireless LAN deployments increasingly common and the indoor wireless LANs are emerging as an ideal solution for providing high speed connectivity for in-building communications operating in 2 GHz frequency band. The proliferation of...
This paper describes the implementation of a wireless sensor network for the temperature monitoring of shellfish catches over the internet. Temperature loggers in shellfish boxes transmit data through radio frequency to a base station. The information is transferred to a server via the GSM network, where it is processed and uploaded to a database. The web-based interface allows configuration of the...
The paper describes design, modeling and simulation of MCM technology based MM wave RF transceiver. Electrical imperfections of the circuit like non-linearity, gain compression, mixer inter modulation, spurious, harmonic level, gain/ level variation over frequency band have been simulated for the prediction of the performance based on dual conversion transmitter and receiver modules. To realize RF...
A wireless health recording and alert system for use by the elderly, athletes in training and firefighters has been devised and implemented. The system has a number of features that can be customized according to the user and type of service required. System consists of three units, i.e. sensor unit, base unit and server unit. The sensor unit basically measures a few physiological parameters in an...
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