Shear sensing based on a microstrip patch antenna

Irshad, Mohammad; Huang, Haiying

doi:10.1088/0957-0233/23/10/105705

Cited by 19 publications

(12 citation statements)

References 23 publications

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“…The dimensions of the radiation patch and the ground plane as well IV. ANTENNA SENSOR FABRICATION The procedure to fabricate the antenna sensor on a dielectric substrate with copper clads on both sides is similar to the printed circuit board (PCB) fabrication technique described by [28]. First, the geometry of the radiation patch and the transmission line was drawn in computer-aided design software and laser printed on a sheet of PCB image transfer film (Techniks Inc., PNPB20).…”

Section: Substrate Selection and Antenna Designmentioning

confidence: 99%

Microstrip Patch Antenna Temperature Sensor

2015

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The resonant frequencies of a microstrip patch antenna are dependent on the dielectric constant of its substrate and the physical dimensions of its radiation patch. Both of these parameters are temperature-dependent. In this paper, we investigated the effects of temperature on the antenna resonant frequencies for the purpose of studying the microstrip patch antenna as a temperature sensor. First, the relationship between the antenna resonant frequency shift and the temperature change is derived based on the transmission line model. To validate the theoretical prediction, antenna sensors bonded on different metal bases were tested in a temperature chamber. By comparing the measured temperature-frequency relationship with the theoretical predictions, we discovered that the dielectric constant of the substrate is not only dependent on temperature but also influenced by the base material. After calibrating the thermal coefficient of the substrate dielectric constant using the measurement data, the differences between the measurements and the theoretical predictions were within the expected systematic error of the reference thermocouple, validating that a microstrip patch antenna can serve as a temperature sensor.

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Section: Substrate Selection and Antenna Designmentioning

confidence: 99%

Microstrip Patch Antenna Temperature Sensor

2015

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“…In addition to the more prevalent sensing techniques described above, wireless sensing methods have also been reported for the measurement of plantar load distributions. In 2012, Mohammad and Huang [106] proposed an antennabased sensing method to measure plantar pressure. As shown in Figure 10(a), the sensor consisted of a reflector and a loop antenna, separated by a dielectric substrate.…”

Section: F Wireless Sensing Methodsmentioning

confidence: 99%

A Review of Wearable Sensor Systems to Monitor Plantar Loading in the Assessment of Diabetic Foot Ulcers

Wang

Jones

Chapman

et al. 2020

IEEE Trans. Biomed. Eng.

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Diabetes is highly prevalent throughout the world and imposes a high economic cost on countries at all income levels. Foot ulceration is one devastating consequence of diabetes, which can lead to amputation and mortality. Clinical assessment of diabetic foot ulcer (DFU) is currently subjective and limited, impeding effective diagnosis, treatment and prevention. Studies have shown that pressure and shear stress at the plantar surface of the foot plays an important role in the development of DFUs. Quantification of these could provide an improved means of assessment of the risk of developing DFUs. However, commerciallyavailable sensing technology can only measure plantar pressures, neglecting shear stresses and thus limiting their clinical utility. Research into new sensor systems which can measure both plantar pressure and shear stresses are thus critical. Our aim in this paper is to provide the reader with an overview of recent advances in plantar pressure and stress sensing and offer insights into future needs in this critical area of healthcare. Firstly, we use current clinical understanding as the basis to define requirements for wearable sensor systems capable of assessing DFU. Secondly, we review the fundamental sensing technologies employed in this field and investigate the capabilities of the resultant wearable systems, including both commercial and research-grade equipment. Finally, we discuss research trends, ongoing challenges and future opportunities for improved sensing technologies to monitor plantar loading in the diabetic foot.

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“…Similar to the antenna strain sensors, these antenna crack sensors operate on the principle that a crack changes the electric dimensions of the antenna and thus can be detected from the resulting frequency shift. Mohammad and Huang (2012b) also demonstrated an antenna shear sensor based on the same principle.…”

Section: Antenna As Sensor Historical Reviewmentioning

confidence: 96%

Antenna Sensors in Passive Wireless Sensing Systems

Huang

2015

Handbook of Antenna Technologies

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Antenna sensors have received considerable interests in recent years due to their passive wireless operation, simple configuration, compact size, multiplexing capability, and multimodality sensitivity. Based on the principle of antenna backscattering, an antenna sensor can be wirelessly interrogated at middle range distances without an onboard battery. Since the antenna serves the dual function of sensing and communicating, an antenna sensor can be implemented with minimum number of components. As narrowband resonators, antenna sensors can be easily multiplexed based on the principle of frequency division multiplexing. In addition, different types of antenna sensors that are sensitive to a variety of physical measurands have been demonstrated. Due to these unique features, antenna sensor technology could play a vital role in our drive toward ubiquitous sensing. This chapter provides a comprehensive review of this exciting technology with detailed descriptions on the operational principle and wireless interrogation of batteryless antenna sensors. Four application examples of using antenna sensors for moisture, dynamic strain, temperature, and crack sensing are discussed. Future research directions and open problems are suggested.

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Shear sensing based on a microstrip patch antenna

Cited by 19 publications

References 23 publications

Microstrip Patch Antenna Temperature Sensor

Microstrip Patch Antenna Temperature Sensor

A Review of Wearable Sensor Systems to Monitor Plantar Loading in the Assessment of Diabetic Foot Ulcers

Antenna Sensors in Passive Wireless Sensing Systems

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