Inductively Coupled Loop Antenna Design for Uhf Rfid on-Body Applications

Tsai, Min-Chuan; Chiu, Chien‐Wen; Wang, Hwang-Cheng; Wu, Ter-Feng

doi:10.2528/pier13080707

Cited by 34 publications

(20 citation statements)

References 13 publications

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“…A possible antenna layout, that is compatible with the above requirements is the planar loop [13] which has been already proposed as wearable tag in view of the known superior radiation performance over dipoles, in close proximity to lossy materials. Hereafter we will refer to the configuration in [13] wherein an external resonating loop is connected to the RFID microchip through a loop-match impedance transformer [20].…”

Section: Dual-loop Epidermal Tagmentioning

confidence: 99%

“…Hereafter we will refer to the configuration in [13] wherein an external resonating loop is connected to the RFID microchip through a loop-match impedance transformer [20].…”

Section: Dual-loop Epidermal Tagmentioning

confidence: 99%

“…However, the cohabitation of passive antenna elements with the human skin, or with living matters in general, represents an intrinsic challenge due to the high losses of tissues which strongly degrade the radiation efficiency of the device and, accordingly, of the length of the communication link. This problem has been widely addressed by the research on wearable antennas; the goal is however to decouple as much as possible the antenna radiation from the body loss by means of ground planes (patch-like antennas) [9], [10] or multi-layer spacers placed between the body and a dipole [11], a slot [12] or a loop antenna [13]. An RFID tag for epidermal applications has to play as both a sensor as well as an antenna and therefore, unlike wearable tags, it has to be placed at direct touch with the body.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Performance of Epidermal RFID Dual-loop Tag and On-Skin Retuning

Amendola

Milici

Marrocco

2015

IEEE Trans. Antennas Propagat.

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Originally introduced by the Material Science community, the Epidermal Electronics is now collecting interest also among Antenna engineers for the potentiality to achieve thin and flexible sensing transponders that are suitable to application over the epidermis. Unlike conventional wearable antennas, which are generally decoupled by the lossy human body by means of spacers or shielding sheets, epidermal tags need to be placed at a very close touch with the skin thus providing poor communication capabilities. This paper investigates, by means of a detailed numerical and experimental study, the performance of an epidermal dual-loop tag for UHF Radiofrequency Identification (RFID) depending on the specific placement over different parts of the human body and for a variety of volunteers. An on-body tuning mechanism is also introduced and demonstrated in real applications at the purpose to improve the tag response and hence to enable the use of a same tag layout for all the UHF RFID bands and for several placement loci.

show abstract

Section: Dual-loop Epidermal Tagmentioning

confidence: 99%

“…Hereafter we will refer to the configuration in [13] wherein an external resonating loop is connected to the RFID microchip through a loop-match impedance transformer [20].…”

Section: Dual-loop Epidermal Tagmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Performance of Epidermal RFID Dual-loop Tag and On-Skin Retuning

Amendola

Milici

Marrocco

2015

IEEE Trans. Antennas Propagat.

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show abstract

“…It has found widespread application in supply chain management, health care, inventory, animaltracking, and security [1]. An RFID system consists of an electronic data-carrying device called the tag, an interrogator or reader, and a host computer with application software.…”

Section: Introductionmentioning

confidence: 99%

Dual-Band Uhf Rfid Tag Antenna Using Two Eccentric Circular Rings

Barman¹,

Bhaskar²,

Singh³

2018

PIER M

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Abstract-A low profile dual-band passive Ultra High Frequency Radio Frequency Identification (UHF RFID) tag antenna designed to operate at two RFID bands allocated for use in and Japan (950-956 MHz) is proposed. The antenna has two eccentric circular rings of different radii to provide dual band response. An arc-shaped strip with Impinj Monza-4 IC chip is used to feed the two rings simultaneously by microstrip-line coupling-feed technique. The proposed design is simulated using Ansoft HFSS, and the prototype is fabricated. The return losses at 866 MHz and 952 MHz are measured to be −12.25 dB and −12.99 dB, respectively, which are in good agreement with the simulated results. The proposed antenna exhibits a 10 dB bandwidth of 9 MHz from 862 to 870 MHz and an 8 MHz 10 dB bandwidth from 949 to 956 MHz covering the UHF RFID bands in Europe and Japan. The maximum read ranges are measured to be around 3 m in the 865-868 MHz band and 2.6 m in the 950-956 MHz band.

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“…After decades of development, radio frequency identification (RFID) technology has made great progress [1][2][3]. However, there are different frequency bands for UHF RFID application in different regions [4], such as 952-955 MHz in Japan, 840.5-844.5 MHz and 920.5-924.5 MHz in China, 866-869 MHz in Europe, and 920-926 MHz in Australia.…”

Section: Introductionmentioning

confidence: 99%

A Uhf Rfid Antenna Using Double-Tuned Impedance Matching for Bandwidth Enhancement

Wang¹,

Liu²,

Li³

et al. 2017

PIER Letters

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Abstract-A broadband ultra-high-frequency (UHF) Radio Frequency Identification (RFID) antenna using double-tuned impedance matching theory is proposed. This paper presents a proximity coupled vertical meandered strip feed technique based on double-tuned impedance match which results in a wide bandwidth. This antenna mainly consists of a rectangular ground plane, a U-shaped radiation patch, and a suspended vertical meandered strip (VMS) by mesas of rotated Γ-shaped strip. The Ushaped radiation patch is fed by the VMS. The simulated and measured results show that the antenna has a very wide impedance matching bandwidth of 150 MHz (820-970 MHz) or 16.8% with the voltage standing wave ration (VSWR) less than 1.5 and achieves a high gain level about 8.5 dBi. Therefore, the proposed antenna can cover the entire UHF band of 840-960 MHz and is a good candidate for universal UHF RFID applications.

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Inductively Coupled Loop Antenna Design for Uhf Rfid on-Body Applications

Cited by 34 publications

References 13 publications

Performance of Epidermal RFID Dual-loop Tag and On-Skin Retuning

Performance of Epidermal RFID Dual-loop Tag and On-Skin Retuning

Dual-Band Uhf Rfid Tag Antenna Using Two Eccentric Circular Rings

A Uhf Rfid Antenna Using Double-Tuned Impedance Matching for Bandwidth Enhancement

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