Transverse deformation effect on sensitivity of strainsensing patch. Microstrip patch antenna can be an ideal choice for the wearable antenna applications 9. Uta advanced sensor technology laboratory the university of. The antenna is reconfigurable because the resonant frequency is a function of the applied tensile strain. Request pdf microstrip patch antenna for simultaneous strain and temperature sensing a patch antenna, consisting of a radiation patch, a dielectric substrate, and. Leon3 1 school of civil and environmental engineering, georgia institute of technology, atlanta, ga 30332, usa 2 school of electrical and computer engineering, georgia institute of technology, atlanta, ga 30332, usa. Exploiting a patch antenna for strain measurements request pdf. Singh, 2017, a stacked dualfrequency microstrip patch antenna for simultaneous shear and pressure displacement sensing, ieee sensors journal, v17, n24, 83148323. The relationship between the antenna resonant frequency shift and temperature variation is first derived based on the transmission line model. The effects of strain and temperature on the antenna resonant frequency must be decoupled to measure strain and temperature independently.
Click here to go to our page on circular patch antennas new for september 2018. Present paper describes the effects of temperature variations on the performances of rectangular patch antenna exposed to different temperatures. Utilising microstrip patch antenna strain sensors for. Resonance frequency of the rfid patch antenna is closely related with its dimension. Distributed wireless antenna sensors for boiler condition. Development of a strain measurement method utilizing a. Pdf effect of temperature variation on microstrip patch. International journal of distributed transverse deformation. Design of a novel passive wireless integrated sawbased. Improving bandwidth rectangular patch antenna using different. Stretchable and reversibly deformable radio frequency. This journal is a supplement to the current record. Temperature chamber tests on patch antenna sensors bonded to three different test samples were carried out.
The strain of patch antenna in length direction is mh 21e aly, which causes the resonant frequency shift k ymh 21e aly. From equation 3, the conductive loss can be reduced by increasing the conductivity of the patch and the ground plane. Microstrip patch antenna for simultaneous strain and temperature sensing journal, may 2018. Microstrip patch antenna for simultaneous strain and temperature sensing, smart materials and structures, v27, 065019. In this work, a flexible multilayer graphene film fgf with a high conductivity of 10 6 sm for antenna based wearable sensors is investigated. Investigating the temperature response of microstrip patch antennas will lead to a simpler temperature sensor that is inexpensive to produce and. Request pdf microstrip patch antenna for simultaneous strain and temperature sensing a patch antenna, consisting of a radiation patch, a dielectric substrate. Batteryfree antenna sensors for strain and crack monitoring. A 3ghz microstrip patch antenna and a 6ghz 2element patch array are fabricated. Oct 26, 2017 the antenna sensor consists of a dualfrequency patch antenna, a superstrate, and a rectangular director. Also the effect of strain direction on the frequency shift is studied.
The antenna is designed at room temperature 300 0 k with operating frequency 2. It is a popular printed resonant antenna for narrowband microwave wireless links that require semihemispherical coverage. Abstractin this paper the feasibility of using a circular microstrip patch antenna to detect strain has been investigated. The antenna temperature is related to the measured noise power as. Microstrip patch antenna for simultaneous strain and temperature. The antenna sensor consists of a dualfrequency patch antenna, a superstrate, and a rectangular director. Microstrip patch antenna for simultaneous strain and. The straincrack induced resonance frequency shift of the antenna can be wirelessly detected and utilized to estimate the surface strain and crack propagation. Microstrip patch strain sensor miniaturization using sierpinski. Antenna projects using hfss electronics electrical projects.
Analysis and design of a strain sensor based on a microstrip patch. There are various benefits of microstrip patch antenna as it is lightweight, compact, flexible and able to resist mechanical strain without affecting antenna performance significantly 10. Slotted 0 82 r c f ll h 6a slotted slotted slotted0 0 r 1 8 1 2 1 c f ff ll h hhh 6b a folded patch antenna b slotted patch antenna fig. Design and simulation of a slotted patch antenna sensor. Temperature chamber tests on patch antenna sensors bonded to three different test. The two fundamental resonant frequencies of the patch antenna are influenced by the lateral and vertical positions of the director with respect to its radiation patch. They are the original type of microstrip antenna described by howell in 1972. The quality factor due to dielectric losses can be improved by using low loss materials for the antenna substrate. It consists of a flat rectangular sheet or patch of metal, mounted over a larger sheet of metal called a ground plane. The sensor node is equipped with an ultrawideband microstrip antenna as the transmittingreceiving txrx antenna and a microstrip patch antenna serving as the temperaturesensing element. Improving bandwidth rectangular patch antenna using. In this research, the initial slotted patch antenna design in yi et al.
In practice, the q c will be lower than equation 3 because of the surface roughness of the patch and the ground plane. Rendering a microstrip patch antenna with simultaneous strain and temperature sensing capabilities will enable temperature compensated strain measurements, resulting in more robust operation of. Slotloaded microstrip patch sensor antenna for high. This project studies a wireless patch antenna as a novel straincrack sensing technique for structural health monitoring shm. The theoretical relationship between the antenna resonant frequency shifts, the temperature, and the applied strain was first established to guide the selection of the dielectric substrate, based on which an antenna sensor with a rectangular radiation patch. Highly sensitive wearable sensor based on a flexible multi. The advanced sensor technology laboratory focuses on developing stateoftheart sensor technologies for structural health monitoring and biomedical applications and providing a multidisciplinary learning environment for the students to participate in world class research activities.
Antenna temperature is not about physical temperature of the antenna parts in degrees celsius or fahrenheit antenna temperature is an equivalent to the noise power per band width that a hypothetical resistor at a noiseless receivers input would have to generate to produce same noise level as the antenna captures from the environment through its pattern characteristics s. A rectangular microstrip patch antenna was used as the strain. The theoretical relationship between the antenna resonant frequency shifts, the temperature, and the applied strain was first established to guide the selection of the dielectric substrate, based on which an antenna sensor with a rectangular radiation patch was designed and fabricated. The relationship between the normalized frequency shift of the antenna sensor and temperature changes up to 280 c was derived and it was veri. Effects of temperature variations on microstrip antenna. If interrogation frequency f is in the neighborhood of fr0 resonance frequency of the receiving patch antenna at sen. The equation describes the basic strain sensing mechanism of the antenna sensor. A patch antenna is a type of radio antenna with a low profile, which can be mounted on a flat surface. A slotted patch antenna for wireless strain sensing. Cho et al passive wireless frequency doubling antenna sensor for strain and crack sensing 5727 during operation, a wireless interrogation signal is emitted from the reader side through a transmitting reader antenna. The theoretical relationship between the antenna resonant frequency shifts, the temperature, and the applied strain was first established to guide the selection of. Exploiting a patch antenna for strain measurements.
The strain sensor based on microwave patch antenna is proposed to monitor structural strain in structural health monitoring. Circular microstrip patch antennas cmpas are one of the promising devices to measure strain in different aerospace materials both conductive and nonconductive. Nevertheless, they are very sensitive to temperature variance 8. Request pdf microstrip patch antenna for simultaneous strain and temperature sensing a patch antenna, consisting of a radiation patch, a dielectric substrate, and a ground plane, resonates at. Apr 10, 2014 the relationship between the antenna resonant frequency shift and temperature variation is first derived based on the transmission line model. Also, the effect of strain direction on the frequency shift is studied.
For the slotted patch antenna sensor, the initial resonance frequency and the shifted resonance frequency under strain can be estimated as. Strain measurement in composite materials using microstrip. Quality factor effect on the wireless range of microstrip. The strain sensor based on microwave patch antenna is proposed to. However, temperature fluctuation can generate some unwanted changes in resonance frequency and introduce. However, temperature fluctuation can generate some unwanted changes in. The slotted patch antenna is modeled using a commercial software package comsol for mechanicselectromagnetics coupled simulation.
Paper te mperature variation effect on a rectangular microstrip patch antenna 4. Thermal effects on a passive wireless antenna sensor for. Tentzeris b a school of civil and environmental eng. Design of wearable patch antenna for wireless body area. Wireless strain measurement using circular microstrip patch. Transverse deformation effect on sensitivity of strain. Similarly, for a transversally pasted antenna, when the longitudinal strain of the plate is e ply, and the resonant frequency shift is k 1e ply. A circular patch antenna has been designed and fabricated to work at 1. Slot antenna saw temperature sensor saw strain sensor saw systems can be connected to a broad variety of customer systems via the following interfaces. Circular microstrip patch antenna strain sensor for wireless structural health monitoring daliri, a, galehdar, a, sabu, j, rowe, w and ghorbani, k 2010, circular microstrip patch antenna strain sensor for wireless structural health monitoring, in stewart liockie, david bissell, alastair greig, maria hynes, david marsh, larry saha, joanna sikora, and dan woodman ed.
Wireless antenna sensors for boiler condition monitoring. The two fundamental resonant frequencies of the patch antenna are influenced by the lateral and vertical positions of the. When the temperature is decreased the value of frequency. The strain crack induced resonance frequency shift of the antenna can be wirelessly detected and utilized to estimate the surface strain and crack propagation. The response of the integrated antenna sensor is related to the mutual coupling of several fields. Direction sensitive strain evaluationmicrostrip patch antenna for simultaneous strain and temperature sensing f mbanya tchafa and h huangthis content was downloaded from ip address 207. Strain and temperature sensing using the resonant frequency shift of the patch antenna. A microstrip patch antenna mpa consists of a conducting patch of any planar or nonplanar geometry on one side of a dielectric substrate with a ground plane on other side. The resonant frequencies of the patch antenna are dependent on the. Temperature sensing without electronics is demonstrated through wireless interrogation of passive antennasensors. Microstrip patch sensor antenna for relative permittivity. A substrate material was selected to achieve a linear sensor response.
The resonant frequency of the patch antenna varied as a function of the tensile strain it experiences. Leon c a school of civil and environmental engineering, georgia institute of technology, atlanta, ga 30332, usa b school of electrical and computer engineering, georgia institute of technology. Changes in strain or temperature cause shifts in the. As antennaenabled passive sensors for sensing temperature, strain. A, the antenna temperature t a is exactly equal to the objects temperature t b if the antenna is lossfree. Circular microstrip patch antenna strain sensor for. In this paper, we studied the microstrip patch antenna for the purpose of temperature sensing. The theoretical model shows a linear relationship between strain and the shift in the resonant frequency of the antenna. Surface acoustic wave devices for wireless strain measurement. Alnbased ceramic patch antennatype wireless passive hightemperature sensor an aluminum nitride aln based patch antennatype hightemperature wireless passive sensor is reported to operate as both a sensor and an antenna, which integrates in situ measurementsensing with remote wireless communication at the same time. A multiband antenna which can be used as a strain sensor for structural health monitoring is proposed. For application in structural health monitoring, a folded patch antenna has been previously designed as a wireless sensor that monitors strain and crack in metallic structures. Circular microstrip patch antenna strain sensor for wireless. Deschamps in 1953, but didnt become practical until the 1970s when it was developed further by researchers such as robert e.
First, a coupled thermalstructural analysis is performed to obtain the thermal expansion at various temperatures, as illustrated in figure 6a. The theoretical model shows a linear relationship between strain and the shift in the resonant frequency of the antenna in any material. Thermal effects on a passive wireless antenna sensor for strain and crack sensing xiaohua yi a, rushi vyas b, chunhee cho a, chiahung fang a, james cooper b, yang wang a, roberto t. A circular microstrip patch antenna is designed and fabricated to work at 1. Uta advanced sensor technology laboratory the university. When patch antenna experiences deformation, the resonant frequency of. This paper presents a simultaneous shear and pressure displacement sensor based on the microstrip patch antenna technology. Utilising microstrip patch antenna strain sensors for structural health monitoring daliri, a, galehdar, a, john, s, rowe, w and ghorbani, k 2011, utilising microstrip patch antenna strain sensors for structural health monitoring, journal of intelligent material systems and structures, vol. Alnbased ceramic patch antenna type wireless passive high temperature sensor an aluminum nitride aln based patch antenna type high temperature wireless passive sensor is reported to operate as both a sensor and an antenna, which integrates in situ measurementsensing with remote wireless communication at the same time.
Design and implementation of broad band and narrow band. Wireless strain measurement using circular microstrip. Radiating properties of the antennas are characterized under tensile strain and agree well with the simulation results. When the antenna sensor is under strain deformation together with the base structure, the antenna resonance frequency varies accordingly.
When the antenna sensor is under straindeformation together with the base structure, the antenna resonance frequency varies accordingly. To measure stress concentration in a base structure, the sensor is bonded to the structure like a traditional. A slotted patch antenna for wireless strain sensing xiaohua yi1, chunhee cho1, benjamin cook2, yang wang1, manos m. The idea is to correlate the strain applied along the length or. Temperature and strain are extracted from the resonant frequencies of the patch antenna as these frequencies are dependent on the dielectric constant of the pcb and the patch dimensions, which are subject to change with applied strain and temperature variations.
A stacked dualfrequency microstrip patch antenna for. Design and simulation of a slotted patch antenna sensor for. Measurement science and technology recent citations. Farfield interrogation of microstrip patch antenna for. Design and simulation of a slotted patch antenna sensor for wireless strain sensing xiaohua yi a, chunhee cho a, benjamin cook b, yang wang a, manos m. Surface acoustic wave saw devices are small, robust, inexpensive solidstate components in which a wave propagates along the surface of a piezoelectric material, and such devices are used in large numbers commercially as delay devices and as filters. This project studies a wireless patch antenna as a novel strain crack sensing technique for structural health monitoring shm.
In this article, the feasibility of using a circular microstrip patch antenna to measure strain and the effects of different materials on sensitivity of the patch antenna are investigated. Saw reader are specialized for different applications, by their performance, interfaces and protection class. A microstrip patch antenna strain sensor operating at 5 ghz has been. Hence 18, 19 have validated the strain sensing capability of microstrip patch antennas and temperature sensing capabilities enabling temperature compensated strain measurements resulting in a. In order to evaluate the deformation of the antenna patch under the influence of strain and temperature, the integrated antenna sensor is modeled in comsol and a twostep simulation is made. To measure stress concentration in a base structure, the sensor is bonded to the structure like a traditional strain gage. Simultaneous strain and temperature sensing using a.
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