Latest developments in the field of textile antennas

Vallozzi, Luigi; Hertleer, Carla; Rogier, Hendrik

doi:10.1016/b978-0-08-100574-3.00026-6

Cited by 18 publications

(8 citation statements)

References 34 publications

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“…Four of the most used fabrics (organic cotton, jeans, viscose and lycra) were tested in order to take into consideration a broad selection of daily use textiles (Figure 1a-d) [38,39]. In the pictures, the different porosity of the fabrics can be seen; these air voids have an impact on the variation of the effective permittivity.…”

Section: Materials Characterizationmentioning

confidence: 99%

Dielectric Characterization of Non-Conductive Fabrics for Temperature Sensing through Resonating Antenna Structures

Ibanez‐Labiano

Alomainy

2020

Materials

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Seamless integration of electronics within clothing is key for further development of efficient and convenient wearable technologies. Therefore, the characterization of textile and fabric materials under environmental changes and other parametric variations is an important requirement. To our knowledge, this paper presents for the first time the evaluation of dielectric characterization over temperature for non-conductive textiles using resonating structures. The paper describes the effects of temperature variations on the dielectric properties of non-conductive fabrics and how this can be derived from the performance effects of a simple microstrip patch antenna. Organic cotton was chosen as the main substrate for this research due to its broad presence in daily clothing. A dedicated measurement setup is developed to allow reliable and repeatable measurements, isolating the textile samples from external factors. This work shows an approximately linear relation between temperature and textile’s dielectric constant, giving to fabric-based antennas temperature sensing properties with capability up to 1 degree Celsius at millimeter-wave frequencies.

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Section: Materials Characterizationmentioning

confidence: 99%

Dielectric Characterization of Non-Conductive Fabrics for Temperature Sensing through Resonating Antenna Structures

Ibanez‐Labiano

Alomainy

2020

Materials

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“…Initially AVA is designed considering microstrip patch of proper dimensions, which depends on required frequency of operation of antenna along with the microstrip transmission line launched on denim jeans as substrate whose relative permittivity ɛ is 1.7 and tan ∂ of 0.025, respectively as shown in figure 3(a) [12]- [19].A balun structure is introduced to match 50Ω microstrip feed line and patch antenna as the AVA is of balanced structure. The balun structure is the parallel plate transmission line which is connected into patch and microstrip feed line by slotting and uniting them [6], [7].Generally the balun structure is developed based on the band width required, operating frequency and physical architecture.…”

Section: Antenna Design-1mentioning

confidence: 99%

A Novel Approach of Designing Insubstantial AVA operating in UWB for GPR Applications

2020

IJETER

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ABSTRACTGround Penetrating Radar (GPR) is one of the capable technologies for exposure and recognition of both metallic and non metallic objects masked under the ground. Bandwidth is one of the parameter for GPR system performance, very high frequencies are required for better resolution of microscopic objects. Ultra wide band GPR system can able to meet the current requirement with more efficiency. An Anti-podal Vivaldi Antenna (AVA) is proposed such that its operating frequency range varies from wideband to ultra wide band. A novel approach of designing Anti-podal Vivaldi Antenna is designed to increase the performance characteristics like gain, frequency of operation, radiation pattern, to reduce return loss, to reduce side lobes levels and to reduce the fabrication cost. In order to reduce the cost of fabrication, the substrate material preferred as denim material. The reason for choosing denim material is, it can be easily incorporated and it is homogeneous in nature. Anti-podal Vivaldi Antenna is designed, simulated using HFSS software and it is fabricated. The results obtained in the simulation process and the fabricated antennas are very relative to each other. The performance characteristics measured by simulation process achieves a maximum gain of more than 7dB and practical antenna achieves around 6.92dB with an operating frequency range from wide band to ultra wide band range from 5.2GHz to 13GHz.

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“…Aunque las antenas textiles son muy apreciadas por sus ventajas (Vallozzi et al, 2016), su proceso de diseño, manufactura y limitantes en materiales conductores que se adhieran al textil de manera correcta, hacen que la evolución de esta clase de antenas sea lenta. En las antenas textiles se emplean diferentes fibras tejidas como sustratos, por lo tanto, es necesario conocer sus propiedades electromagnéticas (εr, tan(δ)) para el diseño eficiente de antenas.…”

Section: Introduciónunclassified

“…Los sustratos textiles más utilizados para antenas textiles son: seda, fieltro, nylon, poliéster, etc. (Yan et al, 2014, Memon et al, 2021 Para el desarrollo de las antenas textiles se debe tener en cuenta algunos factores para el diseño y desarrollo, por ejemplo los tejidos del cuerpo humano interfieren en el funcionamiento de la antena y en su forma de propagación, además cuando la antena textil absorbe humedad se verá afectado su parámetro de scattering (Vallozzi et al, 2016).…”

Section: Introduciónunclassified

Antena Textil para Aplicaciones de Internet de las Cosas Analizada con la Teoría de Modos Característicos

2023

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En este artículo se ha presentado el diseño de una nueva antena textil usada para aplicaciones de IoT. La antena propuesta esta diseñada por dos elementos resonantes esbozados sobre un material de tela mezclilla con un εr = 1.78. Para describir el comportamiento y encontrar la zona óptima para alimentar la estructura se ha utlizado la Teoría de Modos Característicos, la antena está alimentada por proximidad de forma capacitiva a través de dos líneas de transmisión, la alimentación posteriormente se transforma en un divisor de potencia que genera una buena adaptación de impedancia (S11 < -10 dB) que va desde 2 GHz a 3,6 GHz con una directividad máxima de alrededor de 4,84 dBi y un diagrama de radiación bidireccional estable en todo el rango de frecuencias, que en presencia del cuerpo humano se transforma en un diagrama unidireccional. Finalmente, la estructura ha sido fabricada y los resultados del coeficiente de reflexión obtenidos son muy similares a aquellos de la simulación.

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Latest developments in the field of textile antennas

Cited by 18 publications

References 34 publications

Dielectric Characterization of Non-Conductive Fabrics for Temperature Sensing through Resonating Antenna Structures

Dielectric Characterization of Non-Conductive Fabrics for Temperature Sensing through Resonating Antenna Structures

A Novel Approach of Designing Insubstantial AVA operating in UWB for GPR Applications

Antena Textil para Aplicaciones de Internet de las Cosas Analizada con la Teoría de Modos Característicos

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