UHF RFID impedance matching: When is a T-match not a T-match?

Reich, Michael; Bauer-Reich, Cherish

doi:10.1109/rfid.2014.6810708

Cited by 19 publications

(11 citation statements)

References 23 publications

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“…In commercial ultra high frequency (UHF) Radio Frequency IDentification (RFID) tags, the 2 most popular printed matching topologies shown in Figure are first the shunt‐series inductance (SSI) circuit and in the second place the inductively coupled‐loop (ICL) . Neglecting the mutual coupling between the metallic traces, the SSI match (preferred here to the misleading term T‐match) can be modeled by the simple L‐network of 2 inductances in Figure A. The optimization of the SSI match in its double‐tuning version yields an increase of frequency bandwidth by a factor of 2–3 compared to an optimal matching at a single frequency .…”

Section: Introductionmentioning

confidence: 99%

Comparison of two matching techniques for UHF RFID tags

Gourari

Meriah

Protat

et al. 2018

Micro & Optical Tech Letters

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respectively. In the Figure 8A,B, the simulation results for S 11 and S 41 are 44.1 and 37.6 dB and the measurement results for S 11 and S 41 are 42.9 and 36.6 dB, respectively. Table 5 shows the is on for comparison for dimension size of the proposed HBC and other HBCs. In the table, the proposed HBC size is reduced the 83% then conventional HBC (see Figure 1). 1,10,11 | C ONCL US I ONIn general, the kg/4 transmission-line (TL) is used for HBC in the microwave system. The dimension size of the conventional kg/4 TL is increased at the low frequency band due to long wavelength. In this article, the new compact-size of the TL usingp-type parameter is suggested and it applied to the design of a HBC. In this characteristic, the HBC is very small size than conventional HBC and the size of the new and conventional HBCs are 9.86 3 11.1 mm 2 and 28.2 3 28.6 mm 2 , respectively. The new structure of the HBC is used by whole distributed elements. The advantage of the proposed HBC structure has very simple structure and low cost. Also, the proposed HBC consists of planar structure. Thus, the proposed structure can also be adequate in a monolithic microwave integrated circuit fabrication due to planar structure. The proposed HBC using p-type TL can be applied to mobile communication system. ORCID Ki-Cheol Yoon AbstractThis Letter reports a comparison between shunt-series inductance (SSI) and inductively coupled loop (ICL) matching circuits for ultra high frequency (UHF) Radio Frequency IDentification (RFID) tags. It is shown analytically that an optimized ICL circuit is fully equivalent to an optimized SSI circuit provided that some adjustments are made on the dipole antenna geometry. Numerical and GOURARI ET AL. | 1763

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Section: Introductionmentioning

confidence: 99%

Comparison of two matching techniques for UHF RFID tags

Gourari

Meriah

Protat

et al. 2018

Micro & Optical Tech Letters

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“…Dipole structures with meandered arms are effective in the development of miniaturized RFID tag antennas and are widely employed in various designs [7,8]. T-matching technique is widely used in the design of RFID tags for achieving the impedance matching between the tag antenna and the chip [9][10]. Manju et al reported, an UHF RFID tag composed of modified multi-fractal cantor arms for enhanced read range.…”

Section: Introductionmentioning

confidence: 99%

UHF RFID Tag Based on Modified Dihedral Corner for Enhanced Read Range and Broadband Operation

Fijo¹,

Aju²,

Mathew³

2018

AEM

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This paper presents the design and development of a novel UHF RFID tag which exhibits enhanced read range over the entire UHF RFID band of 860-930MHz. This novel UHF RFID tag consists of an antenna based on modified dihedral corner with an embedded double T-match and a Murata LXMS 31ACNA010 chip attached to the terminals of the antenna. Measured read range variations over the azimuth and elevation angular ranges show enhanced read range over wide angular ranges as compared to conventional RFID tags.

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“…A T-matching technique is widely used in the design of RFID tags which enables proper matching between the tag and the chip for maximum power transfer [17,18,26]. Split ring resonator (SRR) [19,20] is a topic of immense interest in electromagnetics and was investigated by many researchers for various applications in antenna design.…”

Section: Introductionmentioning

confidence: 99%

SRR Loaded Compact Uhf Rfid Tag for Broadband Operation

Kunju¹,

Abraham²,

Mathew³

2016

PIER C

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Abstract-An SRR loaded compact RFID tag for broadband operation over the UHF RFID band is presented. The tag antenna structure is composed of a dipole whose arms are symmetrically loaded with square split ring resonators (SRRs) along a short circuited strip between the SRRs. The antenna is made inductive and reduced in overall size by the SRR sections. The measured read range characteristics of the proposed RFID tag with an RFID chip Alien Higgs-3 are presented. The proposed tag operates over the entire UHF RFID band about a maximum read range of 7 meters in the entire elevation angular ranges and over wide azimuthal angular ranges.

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UHF RFID impedance matching: When is a T-match not a T-match?

Cited by 19 publications

References 23 publications

Comparison of two matching techniques for UHF RFID tags

Comparison of two matching techniques for UHF RFID tags

UHF RFID Tag Based on Modified Dihedral Corner for Enhanced Read Range and Broadband Operation

SRR Loaded Compact Uhf Rfid Tag for Broadband Operation

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