Microwave Dielectric Behaviour of Wet Soils


Book Description

This book offers detailed discussion of dielectric measurement and behaviour of wet soil, from theoretical and experiment points of view. The author describes numerous microwave measurement techniques and protocols, and shows how to evaluate and choose among them. The book is written primarily with the requirements of interdisciplinary researchers in agriculture and soil science in mind.







Microwave Dielectric Behaviour of Wet Soils


Book Description

This book offers detailed discussion of dielectric measurement and behaviour of wet soil, from theoretical and experiment points of view. The author describes numerous microwave measurement techniques and protocols, and shows how to evaluate and choose among them. The book is written primarily with the requirements of interdisciplinary researchers in agriculture and soil science in mind.













Microwave Dielectric Behavior of Soils. Report 1. Summary of Related Research and Applications


Book Description

As a precursor to developing a well-documented database of complex electrical properties of soils as a function of signal frequency, sample moisture, sample temperature, and soil type, a comprehensive study of existing data collection methodology and analytical modeling was undertaken. Of particular utility are chronological tables of experimental and analytical milestones as well as an extensive reference list. Several appendices are included that are helpful in understanding soil-electromagnetic wave interactions and new concepts in modeling soil structure. Complex dielectric constant, Microwave, Soil, Conductivity, Permittivity.







Microwave Dielectric Behavior of Soils. Report 3. Measurement and Modeling


Book Description

Making use of a coaxial reflection/transmission experimental procedure described in Report 2 of this series, a large number of complex dielectric property measurements were made of soil samples that ranged in texture from a poorly graded sand to a pure nonswelling clay mineral. Two methods of modeling the results are discussed. One is an equivalent circuit representation that accounts for both low-frequency conductivity and higher frequency dielectric relaxation losses in the soil/water mixture. The other model consists of a fractal description of soil structure combined with the concept of long-range electrical connectivity at less than 100 percent saturation. Complex dielectric constant, Microwave, Conductivity, Permittivity, Equivalent circuits, Soil.




Microwave Dielectric Behavior of Soils. Report 2. A Unique Coaxial Measurement Apparatus


Book Description

A reflection/transmission laboratory apparatus and data collection methodology are described that can be used to measure the complex dielectric response of moist soils over the 100 MHz-18 GHz frequency range. The experimental setup includes a square cross-sectional coaxial sample holder, a vector network analyzer system for signal generation and detection, and an external bath for sample temperature control. Data collected on liquids whose dielectric response is well known verify that the electrical property calculation algorithm functions properly. Complex dielectric constant, Permittivity, Conductivity, Soil, Microwave.