Trang T. Thai

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A highly sensitive wireless passive radio frequency strain transducer is designed and developed based on a patch antenna loaded with an open loop. A novel idea of utilizing a cantilever at the gap of the open loop significantly improves the sensitivity of resonant frequency shifts. The ground plane allows the sensitivity of the sensor to be independent from(More)
A novel design of a highly sensitive wireless passive radio frequency strain transducer is presented based on a patch antenna loaded with an open loop that is capable of sensing strain remotely. The new idea of utilizing a cantilever at the gap of the open loop significantly improves the sensitivity of resonant frequency shifts. In measurements, the(More)
A wireless passive ultrasensitive temperature transducer is presented in this paper. The transducer consists of micro bimorph cantilevers (Aluminum-Silicon) and split ring resonators, operating at millimeter wave frequencies around 30 GHz. As the temperature changes, the bilayer cantilevers deflect and thus alter the resonant frequencies of the resonators.(More)
A highly sensitive and compact radio frequency transducer is designed for differential pressure sensing that utilizes a stacked-patch resonator. This device, the first of its kind to be reported, functions as both a pressure sensing agent and a wireless communicating front-end, thus allowing miniaturization and easy integration. The resonator consists of a(More)
The wireless measurement of various physical quantities from the analysis of the RADAR Cross Sections variability of passive electromagnetic sensors is presented. A millimetre-wave Frequency-Modulated Continuous-Wave RADAR is used for both remote sensing and wireless identification of sensors. Long reading ranges (up to some decameters) may be reached at(More)
In this paper, we present the wirelessmeasurement of various physical quantities from the analysis of the radar cross section variability of passive electromagnetic sensors. The technique uses a millimeter frequency-modulated continuous-wave radar for both remote sensing and wireless identification of sensors. Long reading ranges (up to some decameters) are(More)
Temperature sensing is critical in many automotive, medical, and industrial systems for applications such as engine operations, space shuttle and aircraft in-flight conditions, and road and bridge health. A passive wireless temperature sensor would enable remote sensing and long term monitoring for those applications. Most existing temperature sensors(More)
The millimetre-wave passive temperature transducer consists of micro bimorph cantilevers (Au-Silicon) and split ring resonators, operating around 30 GHz. The temperature change causes a deflection on the bimorph cantilevers, thus results in a shift of resonant frequencies of the split ring structure. The design achieves sensitivity of 2.62 GHz/um in terms(More)
and would to thank Per O. Iversen, SATIMO USA for supplying the microwave chamber in the antenna radiation measurement. In addition, I am profoundly grateful to my advisors, Prof. Manos Tentzeris and Dr. Gerald DeJean, who have given me the guidance that has significantly influenced my academic career through the last two years of my undergraduate study at(More)
A new highly sensitive radio frequency pressure transducer has been designed to operate in the millimeter wave frequency range that can be seamlessly integrated with other RF circuits in the LTCC multilayer packaging technology. The resonator consists of a stacked-patch based on LTCC multilayer packaging technology, having an air cavity embedded by a(More)