Engineered smart substrate with embedded patterned permalloy thin film for radio frequency applications

Peng, Yujia; Rahman, Bushra; Wang, Tengxing; Nowrin, Chamok; Ali, Mohammod; Wang, Guoan

doi:10.1063/1.4908299

Cited by 11 publications

(4 citation statements)

References 12 publications

(10 reference statements)

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“…The S 11 degrades with bending which may be due to reduction in current distribution at the edge of the patch [25,26]. Bending changes the effective length of the antenna, which may be the reason for marginal shift in resonance frequency [27][28][29]. −10 dB bandwidth and directivity of the antenna does not show significant variation with bending.…”

Section: Analysis Of the Resultsmentioning

confidence: 99%

“…Bulk ferrites are rigid and have high magnetic loss at microwave frequencies which deteriorates the performance of the antenna [18][19][20]. Magneto-dielectric (MD) substrate material with nano ferrites inclusions in polymer matrix can be considered as an alternate substrate material [12,13,[21][22][23][24][25][26][27][28]. Nano-sized ferrites are reported to have low saturation magnetization and low eddy current losses [29,30].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

CPW-Fed Body Worn Monopole Antenna on Magneto-Dielectric Substrate in C-Band

Gogoi¹,

Bhattacharyya²,

Bhattacharya³

2018

PIER C

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Body worn antennas generally face the problem of isolation when operated in close proximity to human body. Use of magneto-dielectric material as substrate for antenna makes the system compact and reduces the influence of body on performance of antenna. In addition, miniaturization of antenna size also takes place. 7 wt.% of nano-sized Ni 0.5 Zn 0.5 Fe 2 O 4 is dispersed as magnetic filler in flexible linear low density polyethylene matrix. Beyond 7 wt.%, the sample stiffens and loses flexibility because of percolation limit of the polymer. Verification of the composite as a potential substrate for a body worn antenna is carried out by fabricating a coplanar waveguide fed simple rectangular monopole antenna, using transmission line model at 6 GHz. Antenna performance is studied by wearing the patch on human wrist. S 11 of −21.78 dB at 5.32 GHz and −10 dB bandwidth of 49.62% is observed. For comparison, an antenna at the same resonant frequency is developed on linear low density polyethylene with magnetic inclusions. The antenna on magneto-dielectric substrate shows better performance than dielectric substrate. The magnetic and dielectric properties of the Nickel Zinc Ferrite-linear low density polyethylene composite magneto-dielectric substrate reduces the influence of the human body which makes the antenna system compact and robust as additional techniques are not required for shielding of human body influence on antenna performance.

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Section: Analysis Of the Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

CPW-Fed Body Worn Monopole Antenna on Magneto-Dielectric Substrate in C-Band

Gogoi¹,

Bhattacharyya²,

Bhattacharya³

2018

PIER C

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“…Although compared with different technologies, magnetically tunable inductors with ferromagnetic materials can provide high quality factor, they could not meet the miniaturization requirement of the modern communication system when a large and cumbersome external biased magnetic field is required. An electrically tunable antenna based on ferromagnetic materials has been developed and reported on an engineered smart substrate [5], which preliminary demonstrates a unique method in designing tunable RF components with DC current. This paper presents the implementation of an electrically tunable band-pass filter enabled with an engineered substrate embedded with patterned Permalloy (Py) thin film.…”

Section: Introductionmentioning

confidence: 99%

Electrically Tunable Bandpass Filter With Patterned Permalloy Thin-Film-Enabled Engineered Substrate

et al. 2015

Self Cite

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An electrically tunable band-pass filter based on engineered substrate embedded with patterned permalloy (Py) thin film has been designed, implemented and characterized. The band-pass filter is designed with metamaterial resonators to achieve a compact size; the designed filter is fabricated on a multi-layered engineered substrate which is composed of a layer of liquid crystal polymer (LCP), a layer of patterned Py thin film, and silicon substrate. The tunability of center frequency for the designed band-pass filter is dependent on the radio frequency characteristics of the implemented engineered substrate. The equivalent permeability of Py thin film embedded in the engineering substrate is electrically tunable with DC current which thus provides high and tunable inductance density for the split-ring resonators (SRRs) in the designed filter; the center frequency of the implemented band-pass filter is thus electrically tunable. The measured results show that the center frequency of the designed band-pass filter shifts from 2.37GHz to 2.45GHz continuously when the applied tuning DC current is changed from 0mA to 500mA. The introduced unique concept of engineered substrate provides design feasibility of filters with continuous frequency tunability, and the implementation of engineered substrate enabled with patterned Py thin film is suitable for the cost effective fabrication of arbitrary tunable RF devices.Index Terms-Patterned Py thin film, split-ring resonators (SRRs), engineered substrate, tunable filter

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“…The wavelength in air is close to 22 m, which involves the use of wire antenna, more precisely a loop antenna. Usually, in classic electronics, NFC antennas are realized on a PCB rigid substrate; but in recent years, flexible substrate NFC antennas have been largely developed [11]. The evolution of printing techniques enables to engrave them on several new materials, for example on thin films [12,13].…”

Section: Introductionmentioning

confidence: 99%

Textile NFC antenna for power and data transmission across clothes

Garnier

Mariage²,

Rault

et al. 2020

Smart Mater. Struct.

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In this article, it is shown how a smartphone can be used together with an e-textile structure, such as smart clothing, or any other smart home textile structure, smart composite, etc, to power it and to send and receive data generated by the e-textile by using the magnetic induction phenomenon through textile materials. This has been achieved using the NFC communication protocol and NFC compatible fully textile antennas without any electronic components such as resistors, inductors or capacitors. Our NFC antennas have been realized by embroidery and geometrical shapes using conductive threads. All the antennas realized have been tested to show their capacity to send the power and to send and receive data from sensors, in particular by testing their resonant frequencies, which are 13.7 MHz and 13.83 MHz, and their quality factor, which are 45 and 55, respectively. The approach used in this work facilitates the design and production of smart textiles and their reliability and washability, as they do not need any more to be equipped with power supplies such as batteries and data acquisition and interface cards, that are not laundering and cleaning friendly and are very difficult to be realized on flexible structures making them textile compatible. Therefore, we believe that in the future, a smartphone placed in specific locations in our clothing (pockets) equipped with our antennas will help the development and the market readiness of future generations of smart textile structures. The realized prototypes will enable to create a sensor network by acting as a current extension transmitting power and data.

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Engineered smart substrate with embedded patterned permalloy thin film for radio frequency applications

Cited by 11 publications

References 12 publications

CPW-Fed Body Worn Monopole Antenna on Magneto-Dielectric Substrate in C-Band

CPW-Fed Body Worn Monopole Antenna on Magneto-Dielectric Substrate in C-Band

Electrically Tunable Bandpass Filter With Patterned Permalloy Thin-Film-Enabled Engineered Substrate

Textile NFC antenna for power and data transmission across clothes

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