Compact Size Directional Coupler for Mobile RFID Reader

Jung, Jinwook; Nae, Kwan-Kyu; Lee, Eun-Jin; Oh, Ha-Ryoung; Seong, Yeong-Rak; Park, Jun‐Seok

doi:10.1109/mwsym.2007.380185

Cited by 5 publications

(2 citation statements)

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“…Because of the extremely small dimension (1581 ϫ 873 m 2 ) of complete package models and wire bonding processes by hand, where possible retarding condition is being measured, the results are of comparatively poor-grade than simulated results. It is expected to have less difference between simulated and measured results by using the Probe Station system, which enables measurement with no need of evaluation board implementation or bonding wires [3].…”

Section: Simulation and Experiments Resultsmentioning

confidence: 99%

Micro balun design and fabrication at 910 MHz and mobile RFID reader miniaturization thereby

Kim¹,

Jung²,

Roh³

et al. 2008

Micro & Optical Tech Letters

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This article represents a microchip balun for UHF mobile RFID system at 910 MHz. This balun is designed by transforming coupled transmission lines into lumped‐element equivalent circuit, and thus monolithic elements that are fabricated by IPD technology replace it for entirely miniaturized size. The corresponding balun performs under 3 dB return loss, with nearly 176 (176.42) degree of phase difference characteristic; therefore, this meets the UHF mobile RFID reader system consideration. © 2008 Wiley Periodicals, Inc. Microwave Opt Technol Lett 50: 2203–2206, 2008; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.23617

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Section: Simulation and Experiments Resultsmentioning

confidence: 99%

Micro balun design and fabrication at 910 MHz and mobile RFID reader miniaturization thereby

Kim¹,

Jung²,

Roh³

et al. 2008

Micro & Optical Tech Letters

Self Cite

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“…The RFID reader transmits continuous radio waves to supply power to the tags and concomitantly receives the back‐scattered signals from the tags in the same frequency band, which is essential to ensure isolation between the transmitter and the receiver. Therefore, a directional coupler that has a property of high isolation is widely used because it is competitive in the aspect of complexity, isolation, and cost compared with the active CMOS circulator or the ferrite material circulator .…”

Section: Introductionmentioning

confidence: 99%

A compact spiral‐coupled directional coupler for a mobile RFID reader via integrated passive technology

Jeon

Kim

2015

Micro & Optical Tech Letters

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This article presents the design and implementation of a high‐performance, compact spiral‐coupled directional coupler using an advanced integrated passive device (IPD) fabrication process on a GaAs substrate for use in mobile radio frequency identification (RFID) reader applications. The IPD fabrication step is introduced specifically to enable the directional coupler, which is constructed by the transformation of the intertwined mutual inductors and air‐bridges, to have a compact size and high Q‐factor. The fabricated coupler achieves only 0.43 dB of insertion loss S21 and it exhibits the coupling S31 of 15.7 dB and the isolation S41 of 27.2 dB. This presented coupler has an extra small size of only 0.72 × 0.82 mm2 and an operational frequency of 910 MHz, which is appropriate for use in an RFID reader system. © 2015 Wiley Periodicals, Inc. Microwave Opt Technol Lett 57:2142–2146, 2015

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Bandwidth enhancement of multisection directional coupler for S band application

Mistry¹,

Ardeshana²

2017

2017 International Conference on Signal Processing and Communication (ICSPC)

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Compact Size Directional Coupler for Mobile RFID Reader

Cited by 5 publications

References 0 publications

Micro balun design and fabrication at 910 MHz and mobile RFID reader miniaturization thereby

Micro balun design and fabrication at 910 MHz and mobile RFID reader miniaturization thereby

A compact spiral‐coupled directional coupler for a mobile RFID reader via integrated passive technology

Bandwidth enhancement of multisection directional coupler for S band application

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