Microwave Sensor Applications in Industry

Tiuri, M.

doi:10.1109/euma.1987.333693

Cited by 12 publications

(9 citation statements)

References 16 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Namely, the electrical variables are not only sensitive to the measurand, but also to other physical quantities. For instance, in resonance-based permittivity sensors, variations in temperature or moisture (environmental factors) may cause unintentional frequency shifts [15], [19], which in turn may produce systematic sensing errors. One solution to partially alleviate the effects of cross sensitivity, particularly those derived from changing environmental conditions, is differential sensing.…”

Section: Introductionmentioning

confidence: 99%

Splitter/Combiner Microstrip Sections Loaded With Pairs of Complementary Split Ring Resonators (CSRRs): Modeling and Optimization for Differential Sensing Applications

Mata-Contreras

Vélez

et al. 2016

IEEE Trans. Microwave Theory Techn.

168

View full text Add to dashboard Cite

This paper focuses on the analysis of splitter/ combiner microstrip sections where each branch is loaded with a complementary split ring resonator (CSRR). The distance between CSRRs is high, and hence their coupling can be neglected. If the structure exhibits perfect symmetry with regard to the axial plane, a single transmission zero (notch) at the fundamental resonance of the CSRR, arises. Conversely, two notches (i.e., frequency splitting) appear if symmetry is disrupted, and their positions are determined not only by the characteristics of the CSRRs but also by the length of the splitter/combiner sections. A model that includes lumped elements (accounting for the CSRR-loaded line sections) and distributed components (corresponding to the transmission lines) is proposed and used to infer the position of the transmission zeros. Frequency splitting is useful for the implementation of differential sensors and comparators based on symmetry disruption. Using the model, the length of the splitter/combiner sections necessary to optimize the sensitivity of the structures as sensing elements is determined. Parameter extraction and comparison to electromagnetic simulations and measurements in several symmetric and asymmetric structures is used to validate the model. Finally, a prototype device sensor/comparator based on the proposed CSRRloaded splitter/combiner microstrip sections is presented.

show abstract

Section: Introductionmentioning

confidence: 99%

Splitter/Combiner Microstrip Sections Loaded With Pairs of Complementary Split Ring Resonators (CSRRs): Modeling and Optimization for Differential Sensing Applications

Mata-Contreras

Vélez

et al. 2016

IEEE Trans. Microwave Theory Techn.

168

View full text Add to dashboard Cite

show abstract

“…ermittivity sensors are prominent electromagnetic sensors whose development begun in the mid-twentieth century [1], [2]. These sensors are highly versatile, as the measurand (the physical quantity of interest) can be either the permittivity or another physical variable directly related to it.…”

Section: Introductionmentioning

confidence: 99%

“…A general drawback of resonance-based sensors is that, as permittivity depends on environmental conditions (e.g., temperature), the resonance frequency can be unintentionally shifted by spurious effects [2], [17]. As is well known, ideal sensors are designed to be linear or linear to some simple mathematical function with the measurand.…”

Section: Introductionmentioning

confidence: 99%

Transmission Lines Loaded With Pairs of Stepped Impedance Resonators: Modeling and Application to Differential Permittivity Measurements

Naqui

Damm

Wiens

et al. 2016

IEEE Trans. Microwave Theory Techn.

110

View full text Add to dashboard Cite

Differential techniques are widely used in communication and sensor systems, as these techniques have been shown to improve the performance. This paper shows how differential sensing of permittivity can be conducted in a simple way. For that purpose, a microstrip line loaded with a pair of stepped impedance resonators is used in two different resonator connections: parallel and cascade. Each resonator is individually perturbed dielectrically so that: (i) when the two individual permittivities are identical, the structure exhibits a single resonance frequency; (ii) when the permittivies are different, resonance frequency splitting occurs, giving rise to two resonances (all these resonances are seen in the form of transmission zeros). The two sensing approaches are successfully validated through electromagnetic simulations and experiments. By virtue of a differential measurement, robustness against changing ambient factors that may produce sensor miscalibration is expected.

show abstract

“…This change in resistance could be exploited for pulse microwave signal measurements. [5] The electric field of a microwave pulse can heat electrons in semiconductors and by measuring the subsequent resistance changer of semiconductor placed in the transmission line, the microwave pulse power can be determined. Investigations of I-V characteristics of different semiconductors have revealed that the most suitable material for the use as a resistive sensor is n-type Silicon.…”

Section: Principle Performance Of Resistive Sensormentioning

confidence: 99%

A Study of Industrial Microwave Sensors for New Millennium

Jha¹

2015

jtasr

View full text Add to dashboard Cite

Infrared and mm waves have become very useful for night vision equipments, heat seeking missiles, molecular spectroscopy and infrared astronomy. Among other things the trapping of infrared radiations by atmospheric gases is also the basis of green house effects. In infrared astronomy, we make study of astronomical objects by observing infrared radiations they emit. Such celestial bodies can not be seen from the earth, because they do not emit much visible light or that light is blocked by dust and cloud, which infrared radiation can penetrate. Thus infrared and mm wave devices have become a challenging issue in the coming time. So it becomes the duty of each and every science loving scholar to add a step in this direction.

show abstract

Microwave Sensor Applications in Industry

Cited by 12 publications

References 16 publications

Splitter/Combiner Microstrip Sections Loaded With Pairs of Complementary Split Ring Resonators (CSRRs): Modeling and Optimization for Differential Sensing Applications

Splitter/Combiner Microstrip Sections Loaded With Pairs of Complementary Split Ring Resonators (CSRRs): Modeling and Optimization for Differential Sensing Applications

Transmission Lines Loaded With Pairs of Stepped Impedance Resonators: Modeling and Application to Differential Permittivity Measurements

A Study of Industrial Microwave Sensors for New Millennium

Contact Info

Product

Resources

About