Frequency Tunable Metamaterial Absorber Using Hygroscopicity of Nature Cork

Autor:	Minyeong Yoo, Kenyu Ling, Sungjoon Lim
Rok vydání:	2015
Předmět:	Materials science Moisture business.industry Analytical chemistry Metamaterial Humidity Substrate (electronics) Molar absorptivity Cork engineering.material engineering Metamaterial absorber Optoelectronics Electrical and Electronic Engineering Absorption (electromagnetic radiation) business
Zdroj:	IEEE Antennas and Wireless Propagation Letters. 14:1598-1601
ISSN:	1548-5757 1536-1225
DOI:	10.1109/lawp.2015.2413939
Popis:	In this letter, a novel frequency tunable metamaterial absorber is proposed for wireless humidity sensor applications made with natural cork. Natural cork has excellent hygroscopicity and its electrical properties can be changed depending on the moisture content. In this work, the absorption ratio of the proposed absorber are simulated and measured in different moisture content ( ${\rm M} = 0\% $ , 1.44%, 5.88%, 13.32%, 18.8%) of the cork substrate. The resonant frequency changed from 4.92 GHz in the dry ( ${\rm M} = 0\% $ ) state to 3.49 GHz in the wet ( ${\rm M} = 18.8\% $ ) state; the measured absorptivity is higher than 90% in all moisture content values. To the best of our knowledge, it is the first metamaterial absorber using natural cork.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::313d3e8654b5da7f6a774147d4d1b117 https://doi.org/10.1109/lawp.2015.2413939 Zobrazit plný text záznamu