Effects of Soil Characteristics on Passive Wireless Sensor Interrogation

被引：8
|
作者：
Frolik, Jeff [1 ]
Lens, John E. [2 ]
Dewoolkar, Mandar M. [2 ]
Weller, Thomas M. [3 ]
机构：
[1] Univ Vermont, Dept Elect & Biomed Engn, Burlington, VT 05405 USA
[2] Univ Vermont, Dept Civil & Environm Engn, Burlington, VT 05405 USA
[3] Univ S Florida, Dept Elect Engn, Tampa, FL 33620 USA
来源：
IEEE SENSORS JOURNAL | 2018年 / 18卷 / 08期
基金：
美国国家科学基金会;
关键词：
Propagation losses; soil moisture; wireless sensor;
D O I：
10.1109/JSEN.2018.2810132
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
Applications, such as the long term in-situ monitoring of geotechnical structures and of agricultural soils, motivate the use of wireless sensors that are of a passive design. However, the effectiveness of such passive devices will be dependent on the power received via a forward interrogation link and the power returned to a data collector via a reverse link. For these applications, link losses will be determined by the transmission medium, i.e., soil. This paper presents a pathloss study of microwave attenuation versus soil type and moisture. Then, we present results for a passive frequency doubling reflectenna (FDR), operating at 1.3 GHz for the forward link and 2.6 GHz for the reverse, buried at various depths in agricultural soil of different moistures. Results indicate that a FDR-based wireless sensors operating in this frequency range could be effectively embedded to a depth of 0.5 m or more, significantly deeper than reported for other passive technologies.
引用
收藏
页码：3454 / 3460
页数：7
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