Frederic Domingue

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A design methodology for the distributed microelectromechanical system (MEMS) impedance matching networks based on the optimization of the uniformity of the Smith chart coverage has been developed. The proposed approach was validated through a comparison between a traditional coplanar waveguide (CPW) design and an improved design based on a slow-wave (SW)(More)
A tunable RF microelectromechanical system (MEMS) impedance-matching network operating at a frequency band from 13 to 24 GHz based on the distributed microelectromechanical transmission line (DMTL) concept is presented in this paper. The network is implemented using a standard 0.35- ¿m CMOS technology and employs a novel suspended slow-wave (SSW) structure(More)
A novel reconfigurable impedance matching network suitable for tunable RF front-ends is presented. The network is based on a transmission line loaded with 8 dual state MEMS capacitive and inductive devices and achieves 256 different impedance states. The application of both the capacitive and inductive elements results in a more uniformly distribution of(More)
This paper presents the design of a reconfigurable RF amplifier based on compact tunable MEMS impedance matching network for low frequency applications. The amplifier uses a pHEMT transistor fabricated in GaAs technology while the MEMS circuits were fabricated using a dedicated RF MEMS process. The reconfigurable network is based on a slow-wave distributed(More)
This paper presents an original passive microwave substrate integrated cavity resonator [substrate integrated waveguides (SIWs)] as an environment sensor for humidity detection. The proposed structures are based on a high quality factor (Q ~ 300) substrate integrated cavity resonator operating at 3.6 and 4.15 GHz. The detection principle is based on a(More)
This paper presents a novel RF-MEMS dielectric-less switched capacitor that exhibits a high capacitance ratio. The proposed design is based on a floating contact element concept that results in a reduced up state capacitance. The switched capacitor was fabricated on 200 mm silicon wafer with an industrial process developed for manufacturing robust and(More)
A working RFID tag used as a The proposed tag has the ability Fig.4 The readings of two tags. Conclusion D C voltage sensor with a spectral signature circuit was produced. to operate in a wireless sensor network since it can be identified by a unique signature. The sensor exhibits a linear range that depends upon the varactor used in the design and allows(More)
This work describes a novel measurement technique for determining the complex permittivity of powdered materials, based on resonant-perturbation of a Substrate Integrated Waveguide (SIW) resonator operating at ~2.5 GHz and calculations from General Dielectric Mixture Model equations. The proposed method is validated with standard powder samples measurement(More)
This paper presents an implementation of a passive wireless hydrogen gas sensor tag operating in ISM band at 900 MHz. The antenna has been designed and fabricated to operate with a MOS hydrogen gas sensor. The preliminary results show a promising integration of MOS hydrogen sensor in wireless systems for future sensors network applications and hydrogen(More)