Title :
Microwave (1-100 GHz) dielectric model of leaves
Author :
Mätzler, Christian
Author_Institution :
Inst. of Appl. Phys., Bern Univ., Switzerland
fDate :
7/1/1994 12:00:00 AM
Abstract :
A semiempirical formula for the complex dielectric permittivity of leaves from different plants is found from a comparison of published measurements covering the frequency range from 1 to 100 GHz. The explicit parameters are the dry-matter fraction md of the leaf and the permittivity εSW of saline water with a salinity of about 1 percent. The physical part of the formula is its basis on εSW while the empirical part is its linearity with md. The formula is applicable to fresh leaves; their m d values are in the range 0.1<md<0.5. A test indicates that besides the md variation and the spectral dependence the formula also describes the temperature variation correctly
Keywords :
backscatter; dielectric properties of substances; geophysical techniques; radar cross-sections; remote sensing; remote sensing by radar; 1 to 100 GHz; SHF EHF UHF; backscatter; complex dielectric permittivity; dielectric model; dielectric property; dry-matter fraction; geophysical measurement technique; leaf; leaves; microwave; radar remote sensing; radar scattering; radiowave reflection; saline water; semiempirical formula; vegetation; Dielectric materials; Dielectric measurements; Electromagnetic coupling; Electromagnetic radiation; Frequency measurement; Linearity; Permittivity measurement; Temperature dependence; Testing; Vegetation mapping;
Journal_Title :
Geoscience and Remote Sensing, IEEE Transactions on
