Wideband adaptive isolator for UHF RFID reader

Autor:	Ilkka Marttila, Kaj Nummila, Pekka Pursula
Jazyk:	angličtina
Rok vydání:	2009
Předmět:	Engineering business.industry Isolator Transmitter Electrical engineering Ultra high frequency Return loss Electronic engineering Radio-frequency identification Hybrid coupler Electrical and Electronic Engineering Wideband Antenna (radio) business
Zdroj:	Pursula, P, Marttila, I & Nummila, K 2009, ' Wideband adaptive isolator for UHF RFID reader ', Electronics Letters, vol. 45, no. 12, pp. 636-637 . https://doi.org/10.1049/el.2009.0512
ISSN:	1350-911X 0013-5194
DOI:	10.1049/el.2009.0512
Popis:	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.
Databáze:	OpenAIRE
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