Determination of the input impedance of RFID transponder antennas with novel measurement procedure using a modified on-wafer-prober

Camp, M.; Herschmann, R.; Zelder, T.; Eul, H.

doi:10.5194/ars-5-115-2007

Cited by 11 publications

(4 citation statements)

References 1 publication

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“…The extension, which can be a SMA connector [12,13], a wafer probe [14], or other type of the structure, has two tips probing the feed of the tag antenna. Fig.…”

Section: Single-ended Probementioning

confidence: 99%

An Accurate Method for Impedance Measurement of Rfid Tag Antenna

Kuo¹,

Chen²,

Lin³

2008

PIER

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Abstract-This paper presents a method of antenna impedance measurement for RFID tag antenna based on a differential probe. The importance of accurate impedance measurement in optimal design of tag antenna, especially for the metal tags, is first addressed. Afterwards, an overview of the existing methods based on the singleended probe and the balun probe is presented. The proposed method using the differential probe is explained based the well-known two port network model. Experiments for both balanced and unbalanced tag antenna measurement demonstrate the differential probe can provided better agreement with simulated results.

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“…The extension, which can be a SMA connector [12,13], a wafer probe [14], or other type of the structure, has two tips probing the feed of the tag antenna. Fig.…”

Section: Single-ended Probementioning

confidence: 99%

An Accurate Method for Impedance Measurement of Rfid Tag Antenna

Kuo¹,

Chen²,

Lin³

2008

PIER

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“…There are several RFID Tag antenna characteristics measurement techniques in the literature [32–39]. In [36–38], very feasible, inexpensive technique for the measurement of the balance RFID tag antenna was proposed which is known as differential probe method.…”

Section: Resultsmentioning

confidence: 99%

A single-sided meandered-dual-antenna structure for UHF RFID tags

Kamalvand

Pandey

Meshram

2017

Int. J. Microw. Wireless Technol.

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A meandered-dual-antenna structure is proposed for UHF radiofrequency identification (RFID) tag. It is composed of two independent antennas printed on the one side of the substrate board. One of the antennas is exclusively used for receiving and harvesting sufficient energy to the tag chip having the complex conjugate impedance of the receiving antenna. The other is for backscatter to enhance maximum differential radar cross-section with purely real input impedance, to enhancement the read range. The receiving antenna is formed by a rectangular loop and a parasitic meandered line. The rectangular loop is used as a feeding element for the meandered line. The backscattering antenna is made using a meandered dipole along with a thin rectangular strip. The input impedance of the receiving antenna is designed to be conjugate matched to the chip impedance (13.5-j110 Ω), whereas the input impedance of backscattering antenna alternatively switched to open and short circuit for modulating the backscattered field. The input impedance of receiving and backscattering antennas is measured using differential probe technique. The simulated and measured results are found in good agreement. It is also demonstrated that the read range of UHF RFID system increased considerably by using the dual-antenna structure.

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“…There are several measurement techniques of the RFID tag antenna characteristics in the literature . In , very feasible, inexpensive technique for the measurement of the balance RFID tag antenna was proposed which is known as Differential Probe Method.…”

Section: Resultsmentioning

confidence: 99%

A single sided dual-antenna structure for UHF RFID tag applications

Kamalvand

Pandey

Meshram

et al. 2015

Int J RF and Microwave Comp Aid Eng

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In this article, a dual-antenna structure is presented for UHF RFID tag. The proposed structure is made of two L-shaped strip antennas along with a cross-shaped slot loaded patch. One antenna is exclusively used for receiving and harvesting full energy with complex conjugate of tag chip, whereas another used as backscatter to enhance maximum differential radar cross section with purely real input impedance, which results in the enhancement of read range. Further, electromagnetic band gap structure is used around the dual-antenna structure to increase the gain which results in improved read range. The proposed antennas are fabricated and the S-parameters are measured with the help of differential probe technique. Simulation and measurement results are found in good agreement. The performance of the proposed antenna is also investigated when it placed on different materials such as metal, wood, glass, and plastic. The study shows that the read range of antenna increases considerably when it is mounted on a metallic surface, while the maximum performance is observed when the antenna is attached on a glass surface with highest relative permittivity. V C 2015 Wiley Periodicals, Inc. Int J RF and Microwave CAE 25:619-628, 2015.

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Determination of the input impedance of RFID transponder antennas with novel measurement procedure using a modified on-wafer-prober

Cited by 11 publications

References 1 publication

An Accurate Method for Impedance Measurement of Rfid Tag Antenna

An Accurate Method for Impedance Measurement of Rfid Tag Antenna

A single-sided meandered-dual-antenna structure for UHF RFID tags

A single sided dual-antenna structure for UHF RFID tag applications

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