Wideband adaptive isolator for UHF RFID reader

Research output: Contribution to journalArticleScientificpeer-review

5 Citations (Scopus)

Abstract

A wideband adaptive isolator for a UHF RFID reader with a minimum component count is introduced. The operation of the device is based on a reflection from a variable load, which is connected to a port of a hybrid coupler. The other ports are connected to the receiver (RX), transmitter (TX) and antenna ports of the reader. The isolator provides an isolation of 50 dB from TX to RX at the 800 MHz-1 GHz band, covering the worldwide UHF RFID bands. The adaptive system ensures high isolation up to an antenna return loss of 6 dB, or reflection coefficient of 0.5. The measured loss in the TX-to-antenna and antenna-to-RX paths is 4 dB.
Original languageEnglish
Pages (from-to)636-637
Number of pages2
JournalElectronics Letters
Volume45
Issue number12
DOIs
Publication statusPublished - 2009
MoE publication typeA1 Journal article-refereed

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Radio frequency identification (RFID)
Antennas
Adaptive systems
Transceivers

Cite this

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title = "Wideband adaptive isolator for UHF RFID reader",
abstract = "A wideband adaptive isolator for a UHF RFID reader with a minimum component count is introduced. The operation of the device is based on a reflection from a variable load, which is connected to a port of a hybrid coupler. The other ports are connected to the receiver (RX), transmitter (TX) and antenna ports of the reader. The isolator provides an isolation of 50 dB from TX to RX at the 800 MHz-1 GHz band, covering the worldwide UHF RFID bands. The adaptive system ensures high isolation up to an antenna return loss of 6 dB, or reflection coefficient of 0.5. The measured loss in the TX-to-antenna and antenna-to-RX paths is 4 dB.",
author = "Pekka Pursula and Ilkka Marttila and Kaj Nummila",
year = "2009",
doi = "10.1049/el.2009.0512",
language = "English",
volume = "45",
pages = "636--637",
journal = "Electronics Letters",
issn = "0013-5194",
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Wideband adaptive isolator for UHF RFID reader. / Pursula, Pekka; Marttila, Ilkka; Nummila, Kaj.

In: Electronics Letters, Vol. 45, No. 12, 2009, p. 636-637.

Research output: Contribution to journalArticleScientificpeer-review

TY - JOUR

T1 - Wideband adaptive isolator for UHF RFID reader

AU - Pursula, Pekka

AU - Marttila, Ilkka

AU - Nummila, Kaj

PY - 2009

Y1 - 2009

N2 - A wideband adaptive isolator for a UHF RFID reader with a minimum component count is introduced. The operation of the device is based on a reflection from a variable load, which is connected to a port of a hybrid coupler. The other ports are connected to the receiver (RX), transmitter (TX) and antenna ports of the reader. The isolator provides an isolation of 50 dB from TX to RX at the 800 MHz-1 GHz band, covering the worldwide UHF RFID bands. The adaptive system ensures high isolation up to an antenna return loss of 6 dB, or reflection coefficient of 0.5. The measured loss in the TX-to-antenna and antenna-to-RX paths is 4 dB.

AB - A wideband adaptive isolator for a UHF RFID reader with a minimum component count is introduced. The operation of the device is based on a reflection from a variable load, which is connected to a port of a hybrid coupler. The other ports are connected to the receiver (RX), transmitter (TX) and antenna ports of the reader. The isolator provides an isolation of 50 dB from TX to RX at the 800 MHz-1 GHz band, covering the worldwide UHF RFID bands. The adaptive system ensures high isolation up to an antenna return loss of 6 dB, or reflection coefficient of 0.5. The measured loss in the TX-to-antenna and antenna-to-RX paths is 4 dB.

U2 - 10.1049/el.2009.0512

DO - 10.1049/el.2009.0512

M3 - Article

VL - 45

SP - 636

EP - 637

JO - Electronics Letters

JF - Electronics Letters

SN - 0013-5194

IS - 12

ER -