USE OF A MICROWAVE CAVITY FOR SENSING DIELECTRIC-PROPERTIES OF ARBITRARILY SHAPED BIOLOGICAL OBJECTS

被引：39

作者：

KRASZEWSKI, AW

NELSON, SO

YOU, TS

机构：

[1] Richard B. Russell Agricultural Research Center, Agricultural Research Service, U.S. Department of Agriculture, Athens

来源：

IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES | 1990年 / 38卷 / 07期

关键词：

Dielectric Properties - Microwave Measurements - Resonators; Cavity--Microwaves;

D O I：

10.1109/22.55777

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：

A rectangular waveguide resonator operating in the H105 mode at 3.2 GHz was used in determining the change in resonant frequency, ∆, and the Q factor of the cavity, ∆T, when measured with and without single corn kernels of various shapes and dimensions. By measuring those variables for a kernel oriented in two positions, differing by a 90° rotation with respect to the maximum E-field vector, the average values of ∆T and ∆T were found to be quite independent of shape. The ratio ∆F/∆T is independent of size and is a function of the material properties (ἐ-1)ἒ. This function is shown to be related to the material density, the moisture content, or other characteristics when all other properties except the one selected remain unchanged. © 1990 IEEE

引用

页码：858 / 863

页数：6

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