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A new methods for controlling leakage power in handheld device was proposed. This paper presents the use of a MEMS switch as a replacement for the sleep transistor method to reduce leakage current allowing for significant improvement in the battery life of portable electronic systems.
Future military and commercial communication systems and sensors will require a new generation of circuits with cognitive, deployable, agile, versatile, survivable and sustainable capabilities. The requirement to accommodate arbitrary-bandwidth signals, poses significant challenges to traditional time-invariant matching networks because of the gain-bandwidth restrictions and their inability to ensure...
In this paper a time-varying matching network is proposed for signal-centric systems. This antenna matching network achieves significantly higher bandwidth than conventional designs with the same circuit topology and complexity. This is achieved by exploiting information about the incident pulse. Time- varying elements control the initial conditions of the reactive components so that excellent matching...
This paper presents a novel and efficient leakage control technique suitable for battery operated systems. In this paper we propose to completely cut off the power supply of combinational digital logic of the baseband processor in the standby mode of operation using an integrated MEMS switch. Measurement results of thermally actuated MEMS switches illustrate extremely low ON resistances (<3Omega)...
In this paper we report the first high-frequency MEMS capacitive switch based on a liquid metal droplet that controls the impedance of a coplanar waveguide line. The droplet forms an RF short or open circuit depending on its distance from the transmission line. The range of the droplet movement is approximately 370mum perpendicular to the line and requires 110V. Unlike conventional MEMS capacitive...
A microresonator concept based on 1:2 internal resonance between the modes of the resonator is explored in this study. The response of the structure under electrostatic actuation is computed and the simulated currents at the input and output ports are presented. Results show that the output current for the T-beam is non-zero for a very small band of frequencies. Unlike linear filters, the proposed...
In this paper, an actuation scheme of RF microelectromechanical systems (MEMS) switches based on a combined DC and AC actuation voltage (AC actuation) is proposed and numerically simulated. Compared to the conventional electrostatic actuation, AC actuation requires a much smaller actuation voltage, which is more suitable for low-voltage application, including wireless phones and sensors. The frequency...
This paper reports on the growth, patterning, and characterization of plasma-enhanced chemical vapor deposition (PECVD) thin diamond film for DC-65 GHz applications. Nanocrystalline films are successfully demonstrated with an average grain size of less than 60 nm that can replace conventional low-quality dielectrics in RF MEMS switches. In addition to their excellent surface properties, the diamond...
In this paper we focus on electromechanical modeling of high-tuning range MEMS varactors with a focus on failures caused by residual compressive stress. In particular, we quantitatively evaluate for the first time a high-tuning range parallel-plate MEMS varactor in the presence of residual compressive stress. A 3D model generated in ANSYS agrees very favorably with the measured data and explains non-ideal...
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