Flexible and Deformable Monopole Antenna Based on Silver Nanoparticles for Wearable Electronics

Guo, Xiaohui; Huang, Ying; Pan, Weidong; Kan, Wenqing; Mao, Leidong; Zhang, Yugang

doi:10.1166/nnl.2017.2528

Cited by 11 publications

(6 citation statements)

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“…Microstrip patch antenna sensors are especially attractive due to their compact size, light weight, ease of manufacturing, and low fabrication cost [34]. Moreover, if the antennas are fabricated on flexible substrates, they can easily conform to nonplanar surfaces [35][36][37]. Guo et al proposed a fabrication procedure for flexible conductive fabric [35].…”

Section: Introductionmentioning

confidence: 99%

Microstrip patch antenna for simultaneous strain and temperature sensing

Tchafa

Huang

2018

Smart Mater. Struct.

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A patch antenna, consisting of a radiation patch, a dielectric substrate, and a ground plane, resonates at distinct fundamental frequencies that depend on the substrate dielectric constant and the dimensions of the radiation patch. Since these parameters change with the applied strain and temperature, this study investigates simultaneous strain and temperature sensing using a single antenna that has two fundamental resonant frequencies. 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. A tensile test specimen instrumented with the antenna sensor was subjected to thermo-mechanical tests. Experiment results validated the theoretical predictions that the normalized antenna resonant frequency shifts are linearly proportional to the applied strain and temperature changes. An inverse method was developed to determine the strain and temperature changes from the normalized antenna resonant frequency shifts, yielding measurement uncertainty of 0.4 °C and 17.22 μ for temperature and strain measurement, respectively.

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Section: Introductionmentioning

confidence: 99%

Microstrip patch antenna for simultaneous strain and temperature sensing

Tchafa

Huang

2018

Smart Mater. Struct.

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“…Another additive manufacturing technique is inkjet printing which can successfully be used for an accurate fabrication of several printed circuits and antennas. For instance, the inkjet printing by using silver nanoparticle ink has been used on a flexible polydimethylsiloxane substrate in [38] and on a polyethylene terephthalate (PET) substrate in [39] for a wearable antenna fabrication. Recently, carbon-based compounds such as graphene enhanced nano-composite materials and carbon nanotubes (CNTs) have gained attention in the printable and flexible electronics to replace conductive metal inks.…”

Section: Inkjet Printingmentioning

confidence: 99%

Numerical and experimental analyses of wearable antennas, including novel fabrication and metrology techniques

2021

Metrology for 5G and Emerging Wireless Technologies

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Most fifth-generation (5G) mobile network applications require wearable antennas to be unobtrusive, low-profile, low-power and electrically small. Such antennas are a crucial element in wearable body-centric wireless system designs for delivering 5G user's experience. Wearable antennas can be employed in a wide range of applications from communicating, harvesting energy to sensing capabilities. For this purpose, fabrics and novel materials such as graphene are been explored in order to cope with the wearable device demands in terms of flexibility, conform-ability and lightweight. Similarly, novel fabrication techniques for wearable antenna prototyping such as screen printing, inkjet printing, embroidery and cutters are been investigated to exploit the unique characteristics of various materials. These innovative fabrication methods allow a high degree of fabrication precision enabling their uptake for 5G applications. Due to power absorption by lossy human body tissues, a distorted radiation pattern and lower radiation efficiency are envi-saged when they are worn on and at proximity to the body. Furthermore, when designing the antenna, the body proximity effects must be considered to prevent significant antenna detuning and the consequent mismatch. Numerical and experimental human body phantoms are used with a view to simulate its impact. This chapter presents an analysis of novel fabrication methods for wearable antennas, methodologies and measurement techniques to characterise their perfor-mance in a dynamic body-worn communication environment. This chapter delivers a review of different novel fabrication techniques for wearable antennas such as various printing processes, machine embroidery and laser methods. Follow by a metrology section, where numerical and experimental human phantoms are explained and durability tests described. Three examples of 5G wearable antennas

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“…While the first technique is expensive and environmentally harsh, the second one using polymer EC with benign solvents, such as ethanol, which is inexpensive but requires thermal annealing [18]. Previous research works have explored the inkjet printing process on different flexible substrates: paper [19], polydimethylsiloxane [20], liquid crystal polymers (LCP) [21], polyethylene terephthalate (PET) [22], and Kapton [23]. Polyimide-based films such as Kapton are lightweight and flexible substrates with smooth surfaces that can withstand high temperatures up to 400 • C, turning them into ideal candidates for this type of process.…”

Section: Introductionmentioning

confidence: 99%

Flexible inkjet-printed graphene antenna on Kapton

Ibanez‐Labiano¹,

Alomainy²

2021

Flex. Print. Electron.

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Flexible printed antennas have attracted a great deal of attention due to their significant potential for different technologies. Using novel materials such as graphene and inkjet printing fabrication techniques is key for further developing this technology. Several studies have characterised them separately, but it is still challenging to merge them to produce plausible flexible antennas. This paper presents the whole methodology, covering the design, fabrication process, and characterisation of a flexible, inkjet-printed graphene-based antenna intended to use within flexible electronics. The antenna pattern follows a new optimised quasi-Yagi–Uda design working in the desired range of operational frequencies (5–6 GHz). It consists of four directors and a pair of reflectors to improve the directivity with an efficiency of 42%. A co-planar waveguide feeding method is designed to tune the impedance matching, ensuring the wearer’s comfort. The flexible Kapton film was treated with plasma to improve the ink’s adhesion and coverage. The novel antenna suggested potential in advanced materials devices, suitable for various wireless applications for next-generation conformal and flexible electronic devices and applications.

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Flexible and Deformable Monopole Antenna Based on Silver Nanoparticles for Wearable Electronics

Cited by 11 publications

References 0 publications

Microstrip patch antenna for simultaneous strain and temperature sensing

Microstrip patch antenna for simultaneous strain and temperature sensing

Numerical and experimental analyses of wearable antennas, including novel fabrication and metrology techniques

Flexible inkjet-printed graphene antenna on Kapton

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