{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,1,25]],"date-time":"2026-01-25T14:30:16Z","timestamp":1769351416078,"version":"3.49.0"},"reference-count":31,"publisher":"MDPI AG","issue":"3","license":[{"start":{"date-parts":[[2017,8,17]],"date-time":"2017-08-17T00:00:00Z","timestamp":1502928000000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"DOI":"10.13039\/501100000855","name":"University of Birmingham","doi-asserted-by":"publisher","id":[{"id":"10.13039\/501100000855","id-type":"DOI","asserted-by":"publisher"}]},{"name":"UK Water Industry Research (UKWIR)"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["JSAN"],"abstract":"<jats:p>Unlike terrestrial Wireless Sensor Networks (WSNs), communication between buried nodes in WUSNs happens through the ground. Due to the complexity of soil, accurate estimation of the underground signal attenuation is challenging. Existing path loss models mainly rely on semi-empirical and empirical mixing models for calculating the dielectric properties of the soil. In this paper, two existing models for estimating the path loss in soil (i.e., the CRIM-Fresnel and Modified-Friis models) are compared with measurements obtained at three locations. In addition, an improved method is proposed for estimating the path loss based on a new approach for calculating the dielectric properties of soil from Time Domain Reflectometry (TDR) measurements. The proposed approach calculates the complex permittivity values from TDR waveform based on a new modified method and subsequently use them as inputs into the Modified-Friis model. The results from the field trials were compared with the proposed method and the existing models. The results of this comparison showed that the proposed estimation technique provides a better estimation of Radio Frequency (RF) attenuation than the existing models. It also eliminates the need to take samples back to the laboratory by providing in situ calculation of attenuation based on TDR.<\/jats:p>","DOI":"10.3390\/jsan6030018","type":"journal-article","created":{"date-parts":[[2017,8,21]],"date-time":"2017-08-21T04:12:17Z","timestamp":1503288737000},"page":"18","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":25,"title":["A New Approach to Estimating the Path Loss in Underground Wireless Sensor Networks"],"prefix":"10.3390","volume":"6","author":[{"given":"Ali","family":"Sadeghioon","sequence":"first","affiliation":[{"name":"School of Engineering, University of Birmingham, Edgbaston, Birmingham, B15 2TT, UK"}]},{"given":"David","family":"Chapman","sequence":"additional","affiliation":[{"name":"School of Engineering, University of Birmingham, Edgbaston, Birmingham, B15 2TT, UK"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-6741-8183","authenticated-orcid":false,"given":"Nicole","family":"Metje","sequence":"additional","affiliation":[{"name":"School of Engineering, University of Birmingham, Edgbaston, Birmingham, B15 2TT, UK"}]},{"given":"Carl","family":"Anthony","sequence":"additional","affiliation":[{"name":"School of Engineering, University of Birmingham, Edgbaston, Birmingham, B15 2TT, UK"}]}],"member":"1968","published-online":{"date-parts":[[2017,8,17]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","unstructured":"Balachander, D., Rao, T.R., and Mahesh, G. (2013, January 11\u201312). RF Propagation Investigations in Agricultural Fields and Gardens for Wireless Sensor Communications. Proceedings of the 2013 IEEE Conference on Information and Communication Technologies, Tamil Nadu, India.","DOI":"10.1109\/CICT.2013.6558195"},{"key":"ref_2","doi-asserted-by":"crossref","unstructured":"Hancke, G. (2012, January 26\u201330). Industrial wireless sensor networks: A selection of challenging applications. Proceedings of the 2012 6th European Conference on Antennas and Propagation (EUCAP), Prague, Czech.","DOI":"10.1109\/EuCAP.2012.6206686"},{"key":"ref_3","doi-asserted-by":"crossref","first-page":"669","DOI":"10.1016\/j.adhoc.2006.04.003","article-title":"Wireless underground sensor networks: Research challenges","volume":"4","author":"Akyildiz","year":"2006","journal-title":"Ad Hoc Netw."},{"key":"ref_4","unstructured":"The National Joint Utiities Group (NJUG) (2007). NJUG Guidelines on the Positioning and Colour Coding of Underground Utilities\u2019 Apparatus, NJUG."},{"key":"ref_5","doi-asserted-by":"crossref","unstructured":"Silva, A.R., and Vuran, M.C. (2009). Empirical Evaluation of Wireless Underground-to-Underground Communication in Wireless Underground Sensor Networks, Springer.","DOI":"10.1007\/978-3-642-02085-8_17"},{"key":"ref_6","doi-asserted-by":"crossref","first-page":"18","DOI":"10.1109\/MAP.2016.2630035","article-title":"Path-Loss Modeling for Wireless Sensor Networks","volume":"59","author":"Kurt","year":"2017","journal-title":"IEEE Antennas Propag. Mag."},{"key":"ref_7","doi-asserted-by":"crossref","unstructured":"Alsayyari, A., Kostanic, I., Otero, C., Mohammed, A., and Kusay, R. (2014, January 6\u20138). An Empirical Path Loss Model for Wireless Sensor Network Deployment in a Sand Terrain Environment. Proceedings of the 2014 IEEE World Forum on Internet of Things (WF-IoT), Seoul, Korea.","DOI":"10.1109\/WF-IoT.2014.6803162"},{"key":"ref_8","doi-asserted-by":"crossref","unstructured":"Aisayyari, A., Kostanic, I., and Otero, C.E. (2014, January 7\u20139). An Empirical Path Loss Model for Wireless Sensor Network Deployment in an Artificial Turf Environment. Proceedings of the 11th IEEE International Conference on Networking, Sensing and Control, Miami, FL, USA.","DOI":"10.1109\/ICNSC.2014.6819700"},{"key":"ref_9","unstructured":"Silva, A.R. (2010). Channel Characterization for Wireless Underground Sensor Networks. [Master\u2019s Thesis, University of Nebraska]."},{"key":"ref_10","unstructured":"Sadeghioon, A.M. (2015). Design and Development of Wireless Underground Sensor Networks for Pipeline Monitoring. [Ph.D. Thesis, School of mechanical enginrring, University of Birmingham]."},{"key":"ref_11","unstructured":"Curioni, G. (2013). Investigating the Seasonal Variability of Electromagnetic Soil Properties Using Field Monitoring Data from Time-Domain Reflectometry Probes. [Ph.D. Thesis, University of Birmingham]."},{"key":"ref_12","doi-asserted-by":"crossref","first-page":"1244","DOI":"10.2136\/sssaj2000.6441244x","article-title":"Impacts of the real and imaginary components of relative permittivity on time domain reflectometry measurements in soils","volume":"1252","author":"Topp","year":"2000","journal-title":"Soil Sci. Soc. Am."},{"key":"ref_13","doi-asserted-by":"crossref","unstructured":"Silva, A.R., and Vuran, M.C. (2010). Development of a Testbed for Wireless Underground Sensor Networks. EURASIP J. Wirel. Commun. Netw., 1\u201314.","DOI":"10.1155\/2010\/620307"},{"key":"ref_14","first-page":"3942","article-title":"Overview of wireless underground sensor networks for agriculture","volume":"11","author":"Yu","year":"2012","journal-title":"African J. Biotechnol."},{"key":"ref_15","unstructured":"Yoon, S. (2013). Wireless Signal Networks: A Proof of Concept for Subsurface Characterization and A System Design with Reconfigurable Radio. [Ph.D. Thesis, Lehigh University]."},{"key":"ref_16","first-page":"188","article-title":"Methods for prediction of soil dielectric properties: A review Remke","volume":"5794","author":"Borchers","year":"2005","journal-title":"Def. Secur."},{"key":"ref_17","doi-asserted-by":"crossref","first-page":"803","DOI":"10.1109\/36.387598","article-title":"Dielectric properties of soils in the 0.3\u20131.3-GHz range","volume":"33","author":"Peplinski","year":"1995","journal-title":"IEEE Trans. Geosci. Remote Sens."},{"key":"ref_18","doi-asserted-by":"crossref","first-page":"1340","DOI":"10.1109\/TGRS.1995.477193","article-title":"Corrections to \u201cDielectric Properties of Soils in the 0.3\u20131.3-GHz Range\u201d","volume":"33","author":"Peplinski","year":"1995","journal-title":"IEEE Trans. Geosci. Remote Sens."},{"key":"ref_19","doi-asserted-by":"crossref","first-page":"3556","DOI":"10.1109\/TGRS.2003.823288","article-title":"Generalized refractive mixing dielectric model for moist soils","volume":"42","author":"Mironov","year":"2004","journal-title":"Geosci. Remote Sens. IEEE Trans."},{"key":"ref_20","doi-asserted-by":"crossref","first-page":"444","DOI":"10.2136\/vzj2003.4440","article-title":"A Review of Advances in Dielectric and Electrical Conductivity Measurement in Soils Using Time Domain Reflectometry","volume":"2","author":"Robinson","year":"2003","journal-title":"Vadose Zone J."},{"key":"ref_21","unstructured":"Chaamwe, N., Liu, W., and Jiang, H. (2010, January 11\u201314). Wave Propagation Communication Models for Wireless Underground Sensor Networks. Proceedings of the 12th IEEE International Conference on Communication Technology (ICCT), Nanjing, China."},{"key":"ref_22","doi-asserted-by":"crossref","unstructured":"Sahota, H., and Kumar, R. (2014, January 7\u20139). Network based sensor localization in multi-media application of precision agriculture Part 1: Received signal strength. Proceedings of the 11th IEEE International Conference on Networking, Sensing and Control, Miami, FL, USA.","DOI":"10.1109\/ICNSC.2014.6819624"},{"key":"ref_23","doi-asserted-by":"crossref","first-page":"755","DOI":"10.2136\/vzj2008.0138","article-title":"Hybrid Wireless Underground Sensor Networks: Quantification of Signal Attenuation in Soil","volume":"8","author":"Bogena","year":"2009","journal-title":"Vadose Zone J."},{"key":"ref_24","unstructured":"Li, L., Vuran, M., and Akyildiz, I. (2007, January 12\u201315). Characteristics of underground channel for wireless underground sensor networks. Proceedings of the Sixth Annual Mediterranean Ad Hoc Networking WorkShop, Corfu, Greece."},{"key":"ref_25","doi-asserted-by":"crossref","unstructured":"Ferrari, G. (2009). Communication Through Soil in Wireless Underground Sensor Networks\u2014Theory and Practice. Sensor Networks, Signals and Communication Technology, Springer.","DOI":"10.1007\/978-3-642-01341-6"},{"key":"ref_26","doi-asserted-by":"crossref","first-page":"254","DOI":"10.1109\/JRPROC.1946.234568","article-title":"A note on a simple transmission formula","volume":"34","author":"Friis","year":"1946","journal-title":"Proc. IRE"},{"key":"ref_27","doi-asserted-by":"crossref","unstructured":"Dane, J.H., and Topp, C. (2002). Methods of Soil Analysis: Part 4, Soil Science Society of America, Inc.","DOI":"10.2136\/sssabookser5.4"},{"key":"ref_28","doi-asserted-by":"crossref","first-page":"986","DOI":"10.2136\/vzj2005.0099","article-title":"Advances in Soil Water Content Sensing","volume":"4","author":"Evett","year":"2005","journal-title":"Vadose Zone J."},{"key":"ref_29","doi-asserted-by":"crossref","first-page":"64","DOI":"10.3390\/jsan3010064","article-title":"SmartPipes: Smart Wireless Sensor Networks for Leak Detection in Water Pipelines","volume":"3","author":"Sadeghioon","year":"2014","journal-title":"J. Sens. Actuator Netw."},{"key":"ref_30","unstructured":"British Standards Institution (BSI) (1990). BS 1377-2 Methods of Test for Soils for Civil Engineering Purposes: Part 2: Classification Tests, BSI."},{"key":"ref_31","unstructured":"Rappaport, T.S. (2001). Wireless Communications: Principles and Practice, Prentice Hall. [2nd ed.]."}],"container-title":["Journal of Sensor and Actuator Networks"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/www.mdpi.com\/2224-2708\/6\/3\/18\/pdf","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2025,10,11]],"date-time":"2025-10-11T18:42:32Z","timestamp":1760208152000},"score":1,"resource":{"primary":{"URL":"https:\/\/www.mdpi.com\/2224-2708\/6\/3\/18"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2017,8,17]]},"references-count":31,"journal-issue":{"issue":"3","published-online":{"date-parts":[[2017,9]]}},"alternative-id":["jsan6030018"],"URL":"https:\/\/doi.org\/10.3390\/jsan6030018","relation":{},"ISSN":["2224-2708"],"issn-type":[{"value":"2224-2708","type":"electronic"}],"subject":[],"published":{"date-parts":[[2017,8,17]]}}}