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A method for determining the complex permittivity and permeability of liquids in a unmatched coaxial cell is presented. This approach is an extension of the well known Nicolson-Ross-Weir (NRW) algorithm. A g-factor is introduced in the reflection coefficient to account for the cell impedance mismatch. Its value can be calculated from theory and adjusted by calibration. The focus of this work is to...
Planar resistance temperature detector, RTD, can be manufactured with microelectronics processing techniques. However, the manufactured planar resistor requires an extra step for adjustment of the 0degC reference resistance, R0. In this paper, we have evaluated the fabrication of nickel-RTD transducers for smart temperature sensors. By applying the smart sensor concept, the resistance adjustment...
Communication modules are required for smart sensors interface with the sensor network. In this paper, a VHDL (VHSIC hardware description language) implementation of a CAN (controller area network) interface for smart sensors is presented. The scope of this paper is the medium access control (MAC) sublayer. Therefore, it deals with the transfer protocol, control of frames, arbitration, error checking...
The effect of the pre-heating temperature on the deposition of c-axis oriented thin ZnO films has been investigated, after fixing a low annealing temperature. The deposition process is optimized to be compatible with silicon/silicon-dioxide substrates, to make piezoelectric coatings for integrated smart sensors. Deposition is carried out on glass and oxidized silicon substrates. The dependence of...
Based on design equations taken from the conformal mapping theory, the authors have investigated the frequency response of a miniaturized coplanar power splitter for instantaneous frequency measurement subsystems application. Devices in different scales are fabricated and measured. The results of insertion loss through both arms of each structure are presented and compared. The devices were made on...
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