Showing papers by "Kamaljit Rangra published in 2018"
TL;DR: In this article, a rectangular paddle micro-cantilever-based wind speed sensor along with its analytical model has been presented, which uses the closed-form solution to the bending stress caused by static deflection.
Abstract: In this paper, fabrication of a rectangular paddle micro-cantilever-based wind speed sensor along with its analytical model has been presented. The analytical model uses the closed-form solution to the bending stress caused by static deflection. Simulations of the device were done using finite-element analysis. The simulation, analytical, and experimental results have been compared for a better insight into the sensor behavior. Piezo-resistive deflection detection mechanism has been utilized to measure the wind speed. The experimental results show that the fabricated sensor can detect wind speed up to 29 ms−1 and has a sensitivity of 0.071 mV/ms−1 – V.
11 citations
TL;DR: In this article, the aging behavior of near atmospheric Ar and Ar+N2 (1:1) ambient sputtered infrared absorber Au thin films was investigated and compared with twenty-five weeks room temperature/vacuum aged thin films.
6 citations
TL;DR: In this paper, the fabrication and characterization of a Film Bulk Acoustic Resonator (FBAR) was reported. But the performance characteristics of the FBARs were not analyzed and it was shown that they have a central frequency at 1.77 GHz with a return loss of −10.7
5 citations
01 Sep 2018-Microsystem Technologies-micro-and Nanosystems-information Storage and Processing Systems
TL;DR: In this paper, a mixed release process of wet and dry is presented to release the stiction free suspended microstructures, which is removed by plasma cleaning, which improves the isolation of the device under test to 22 dB from 15 dB after plasma exposure.
Abstract: RF MEMS switches have moving microstructures which are realized either by dry release method or by wet releasing process. In dry release process, suspended bridges gets curled up due to high process temperature while in wet release method, surface of the released devices is get contaminated which affects the final performance of the device. In this paper, a mixed release process of wet and dry is presented to release the stiction free suspended microstructures. Contamination from the devices is removed by plasma cleaning. Isolation of the device under test has been improved to 22 from 15 dB after plasma exposure.
4 citations
01 Mar 2018-Microsystem Technologies-micro-and Nanosystems-information Storage and Processing Systems
TL;DR: In this article, the authors proposed use of micromachined SiO2 thin membrane as thermal insulation layer in bulk micromACHined pyroelectric infrared sensor. And the study is supported by the comparative radiation heat transfer, finite element analysis and the practical thermal measurements on fabricated pyro electric infrared sensor using non destructive thermal imaging method.
Abstract: Pyroelectric infrared sensors utilize interfacial polymer bonding, thick porous silica layer and Si3N4 thin film as conventional methods of reducing heat sinking with substrate. The thick polymer and porous silica layers cause additional enhancement in thermal time constant (?D) as well thermal mass (Cth) of pyroelectric sensor which reduces the rate of temperature change (dT/dt) and limits responsivity at lower frequencies. The SiO2 thin layer posses lower heat conductivity than Si3N4 thin films and often used in Si bulk micromachining as etch barrier. This paper proposes use of micromachined SiO2 thin membrane as thermal insulation layer in bulk micromachined pyroelectric infrared sensor. The study is supported by the comparative radiation heat transfer, finite element analysis and the practical thermal measurements on fabricated pyroelectric infrared sensor using non destructive thermal imaging method.
4 citations
1 citations
01 Jan 2018
TL;DR: In this article, experimental results due to the continuous exposure to external cell phone radiation on the nervous system are reported, where data are stored using DSO and analyzed by ORIGIN software.
Abstract: Conduction of an external sensed signal in the human nervous system can be defined in the form of electrical RC circuit equivalent which is realized very well by the researchers. In this paper, experimental results due to the continuous exposure to external cell phone radiation on the nervous system are being reported. Experimental data are stored using DSO and analysed by ORIGIN software. Comparison of rise/fall time of electrochemical KCL in the presence and absence of cell phone radiation is shown for this purpose.
1 citations
TL;DR: In this paper, a design to alleviate charging issues for RF MEMS switches is proposed to alleviate the stiction and drift in pull-in voltage caused by dielectric charging.
Abstract: The presence of dielectric charging in a switch causes stiction and drift in pull-in voltage. A design to alleviate charging issues for RF MEMS switches is proposed. An RF MEMS capacitive switch has been fabricated and characterized. Measured pull-in of the switch is <20 V and pull-up voltage is 17 V with a switching time of 78 μs. Insertion loss and isolation of the switch are measured by varying RF power from 0 to 15 dBm at room temperature. Insertion loss and isolation of the switch are better than 0.1 and 17 dB, respectively. Resonant frequency of the device is 8.4 kHz. The switch has completed 600 million cycles.
1 citations