RF evanescent-mode cavity resonator for passive wireless sensor applications

Zhao, Yirong; Li, Yuan; Pan, Bo; Kim, Seong Hyok; Zhan, Liu; Tentzeris, Manos M.; Papapolymerou, John; Allen, Mark G.

doi:10.1016/j.sna.2010.04.017

Cited by 35 publications

(24 citation statements)

References 10 publications

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“…Afterwards, Cheng et al designed a low-profile temperature sensor based on planar patch resonator which can realize temperature measurement up to 1050 ∘ C [8]. And for pressure measurement, Zhao innovatively proposed a wireless passive sensing technique based on evanescent-mode cavity resonator, successfully demonstrating airflow and displacement measurements by integrating an UWB monopole antenna [9]. But the sensor was not fabricated in high temperature resistant material.…”

Section: Introductionmentioning

confidence: 99%

Highly Sensitive Reentrant Cavity-Microstrip Patch Antenna Integrated Wireless Passive Pressure Sensor for High Temperature Applications

Guo

Tan

et al. 2017

Journal of Sensors

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A novel reentrant cavity-microstrip patch antenna integrated wireless passive pressure sensor was proposed in this paper for high temperature applications. The reentrant cavity was analyzed from aspects of distributed model and equivalent lumped circuit model, on the basis of which an optimal sensor structure integrated with a rectangular microstrip patch antenna was proposed to better transmit/receive wireless signals. In this paper, the proposed sensor was fabricated with high temperature resistant alumina ceramic and silver metalization with weld sealing, and it was measured in a hermetic metal tank with nitrogen pressure loading. It was verified that the sensor was highly sensitive, keeping stable performance up to 300 kPa with an average sensitivity of 981.8 kHz/kPa at temperature 25 ∘ C, while, for high temperature measurement, the sensor can operate properly under pressure of 60-120 kPa in the temperature range of 25-300 ∘ C with maximum pressure sensitivity of 179.2 kHz/kPa. In practical application, the proposed sensor is used in a method called table lookup with a maximum error of 5.78%.

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Section: Introductionmentioning

confidence: 99%

Highly Sensitive Reentrant Cavity-Microstrip Patch Antenna Integrated Wireless Passive Pressure Sensor for High Temperature Applications

Guo

Tan

et al. 2017

Journal of Sensors

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“…However, quality (Q) factors of LC resonators are usually very limited, especially at high temperatures. For example, Q factor of the pressure sensor in [9] is only 6 at 400 o C. Alternatively, evanescent-mode resonators, with high Q factors, were utilized to wirelessly detect pressure [12], air flow [13] and temperature [14] by measuring cavity deformations. In these sensors [12,13], antennas were designed separately therefore adding additional volume to the entire sensor structure.…”

Section: Introductionmentioning

confidence: 99%

“…For example, Q factor of the pressure sensor in [9] is only 6 at 400 o C. Alternatively, evanescent-mode resonators, with high Q factors, were utilized to wirelessly detect pressure [12], air flow [13] and temperature [14] by measuring cavity deformations. In these sensors [12,13], antennas were designed separately therefore adding additional volume to the entire sensor structure. In addition, the aforementioned evanescent-mode sensors operate below 90 o C. In this paper, we will demonstrate a compact wireless passive pressure sensor for harsh-environment applications using high-Q evanescent-mode resonators, robust ceramic and metallic materials, and integrated antenna.…”

Section: Introductionmentioning

confidence: 99%

Evanescent-mode-resonator-based and antenna-integrated wireless passive pressure sensors for harsh-environment applications

Cheng

Shao

Ebadi

et al. 2014

Sensors and Actuators A: Physical

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“…Earlier it was considered many approaches of establishing the various sensors. For example, a radio-frequency evanescent-mode cavity resonator for passive wireless sensor applications has been presented in [5,6]. These papers considered such structures for the various airflow measurements.…”

mentioning

confidence: 99%

“…These papers considered such structures for the various airflow measurements. The purpose of this paper is investigation of a novel structure of an initial transducer on the base of ideas of [5,6].The structure of proposed insertion is shown in Fig. 1 (a).…”

mentioning

confidence: 99%

The open-ended waveguide transducer with wire in circular window

Grymalyuk

Drobakhin

2013

2013 International Kharkov Symposium on Physics and Engineering of Microwaves, Millimeter and Submillimeter Waves

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Development of microwave scanning near-field microscopy and introscopy in millimeter-wave range is the problem of keen interest [1][2][3][4] due to perspectives of applications in novel technologies. The detection of defects in dielectric slabs and measurements of parameters of materials are urgent tasks of the applied physics. A method of employing waveguide-type microscopic aperture probe has been proposed in [1]. It has been shown that the microscopic aperture has allowed one to get high spatial resolution of scanning microscopy for surface topography. Structures consisting with a conducting plate, placed outside a waveguide-fed rectangular aperture were proposed for non-destructive measurements of the dielectric samples [2,3]. Specifically, λ/4 -resonator and ring microwave one can be used for this purpose as an initial transducer. But the problem is to improve the spatial resolution and sensitivity. The advantage of waveguide structures is excellent shielding effect due to its metallic walls, thus avoiding radiation loss even in the millimeter-wave range. Thus, creation of the sensors in millimeter range on the basis of the waveguide structures is rather perspective. Earlier it was considered many approaches of establishing the various sensors. For example, a radio-frequency evanescent-mode cavity resonator for passive wireless sensor applications has been presented in [5,6]. These papers considered such structures for the various airflow measurements. The purpose of this paper is investigation of a novel structure of an initial transducer on the base of ideas of [5,6].The structure of proposed insertion is shown in Fig. 1 (a). Its cross-section dimensions of the waveguide were of 7.2×3.4 mm. Circular window diameter was of 2 mm, the diameter of the wire was of 0.6 mm. The dielectric layer placed right against the insertion flange is presented in Fig. 1 (b). a) b) Figure 1. The structure of the insertion with wire in circular window (a) and the longitudinal section of structure with dielectric layer placed right against the insertion flange (b)The material of the waveguide insertion was copper. The dielectric layer with loss angle tangent of 0.001 had sizes of 7.2×3.4×1 mm. The calculations were carried out by the finite element method. The reflection coefficient (R) versus frequency for the suggested insertion with the dielectric layer has shown in Fig. 2. The dielectric permittivity of the slab was varied from 4 to 7. The graphs of the reflection coefficient has been presented only for some selected values of the permittivity in order to present the behavior of two different resonance frequencies which have been induced by different properties of the structure. The resonance curve 442 978-1-4799-1068-7/13/$31.00 ©2013 IEEE

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RF evanescent-mode cavity resonator for passive wireless sensor applications

Cited by 35 publications

References 10 publications

Highly Sensitive Reentrant Cavity-Microstrip Patch Antenna Integrated Wireless Passive Pressure Sensor for High Temperature Applications

Highly Sensitive Reentrant Cavity-Microstrip Patch Antenna Integrated Wireless Passive Pressure Sensor for High Temperature Applications

Evanescent-mode-resonator-based and antenna-integrated wireless passive pressure sensors for harsh-environment applications

The open-ended waveguide transducer with wire in circular window

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