Modeling the Microwave Transmissivity of Row Crops

Authors

  • Jeil Park Department of Electrical and Computer Engineering Iowa State University, Ames, Iowa 50011-1046, USA
  • Praveen Gurrala Department of Electrical and Computer Engineering Iowa State University, Ames, Iowa 50011-1046, USA
  • Brian K. Hornbuckle Department of Agronomy Iowa State University, Ames, Iowa 50011-1051, USA
  • Jiming Song Department of Electrical and Computer Engineering Iowa State University, Ames, Iowa 50011-1046, USA

Keywords:

HFSS, scattering, SMOS, SMAP, soil moisture, S-parameters, transmissivity, vegetation optical depth

Abstract

We develop a method to model the microwave transmissivity of row crops that explicitly accounts for their periodic nature as well as multiple scattering. We hypothesize that this method could eventually be used to improve satellite retrieval of soil moisture and vegetation optical depth in agricultural regions. The method is characterized by unit cells terminated by periodic boundary conditions and Floquet port excitations solved using commercial software. Individual plants are represented by vertically oriented dielectric cylinders. We calculate canopy transmissivity, reflectivity, and loss in terms of S-parameters. We validate the model with analytical solutions and illustrate the effect of canopy scattering. Our simulation results are consistent with both simulated and measured data published in the literature.

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Author Biographies

Jeil Park, Department of Electrical and Computer Engineering Iowa State University, Ames, Iowa 50011-1046, USA

Jeil Park was born in Seoul, Korea. He received the B.E. degree from Korea Military Academy, Korea, in 2011 and the M.S. degree in Electrical Engineering from Iowa State University, USA, in 2020. He is servicing active duty in the ROK army. His research interests focus on modeling and simulations of vegetation canopy and scattering parameter analysis.

Praveen Gurrala, Department of Electrical and Computer Engineering Iowa State University, Ames, Iowa 50011-1046, USA

Praveen Gurrala received the B.Tech degree from Indian Institute of Technology Madras in 2014, and the Ph.D. degree from Iowa State University in 2020, both in electrical engineering. He is currently an EMI characterization engineer at Micron Technology, Inc. His research interests include computational modeling of ultrasonic and eddy current NDE inspections, fast-multipole boundary element methods, and capacitance tomography.

Brian K. Hornbuckle, Department of Agronomy Iowa State University, Ames, Iowa 50011-1051, USA

Brian K. Hornbuckle received the Ph.D. degree in Electrical Engineering and Atmospheric Science from the University of Michigan in 2003. He is presently a Professor in the Department of Agronomy at Iowa State University. Hornbuckle's research goal is to use satellite microwave remote sensing to monitor the movement of water among the soil, vegetation, and atmosphere in agricultural regions. He is a member of the IEEE Geoscience and Remote Sensing Society, the American Geophysical Union, the Soil Science Society of America, and the American Society of Agronomy.

Jiming Song, Department of Electrical and Computer Engineering Iowa State University, Ames, Iowa 50011-1046, USA

Jiming Song received Ph.D. degree in Electrical Engineering from Michigan State University in 1993. From 1993 to 2000, he worked as a Postdoctoral Research Associate, a Research Scientist and Visiting Assistant Professor at the University of Illinois at Urbana-Champaign. From 1996 to 2000, he worked part-time as a Research Scientist at SAIC-DEMACO. Song was the principal author of the Fast Illinois Solver Code (FISC). He was a Principal Staff Engineer/Scientist at Semiconductor Products Sector of Motorola in Tempe, Arizona before he joined Department of Electrical and Computer Engineering at Iowa State University as an Assistant Professor in 2002.
Song currently is a Professor at Iowa State University’s Department of Electrical and Computer Engineering. His research has dealt with modeling and simulations of electromagnetic, acoustic and elastic wave propagation, scattering, and non-destructive evaluation, electromagnetic wave propagation in metamaterials and periodic structures and applications, interconnects on lossy silicon and radio frequency components, antenna radiation and electromagnetic wave scattering using fast algorithms, and transient electromagnetic fields. He received the NSF Career Award in 2006 and is an IEEE Fellow and ACES Fellow.

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Published

2021-11-04

How to Cite

[1]
J. . Park, P. . Gurrala, B. K. . Hornbuckle, and J. . Song, “Modeling the Microwave Transmissivity of Row Crops”, ACES Journal, vol. 36, no. 06, pp. 816–823, Nov. 2021.

Issue

2021: Vol 36 Iss 6

Section

General Submission