APPLICATION OF nonPLANAR MICROSTRIP MICROWAVE STRUCTURES FOR gauging the DIELECTRIC PARAMETERS OF LIQUIDS AND SOLID MATERIALS

В данной статье отражаются основные результаты компьютерного моделирования, практической реализации и применения непланарной микрополосковой периодической СВЧ структуры в качестве преобразовательного элемента в задачах контроля диэлектрических параметров материалов и веществ. Основными достоинствами подобной реализации датчика являются большая чувствительность и относительно небольшие линейные размеры по сравнению с аналогичными, реализованными на основе планарных СВЧ структур. Помимо этого, благодаря непланарной форме микрополосковой линии расширяется диапазон областей применения СВЧ датчиков. This article reflects the main results of computer modeling, practical implementation and application of a nonplanar microstrip periodic microwave structure as transducer in the problems of gauging the dielectric parameters of materials and substances. The main advantages of such a sensor implementation are high sensitivity and relatively small linear dimensions in comparison with similar ones based on planar microwave structures. In addition, due to the nonplanar shape of the microstrip line, the range of applications for microwave sensors is expanded.

Microwave Bragg structures in a half-open coaxial line

Bragg microwave structures in a coaxial line have found application as converting elements in devices for dielectric control of liquid and bulk medias. A feature of the measuring conversion of the complex dielectric constant in coaxial structures is the introduction of the substance under study into the inner space of the line. The latter circumstance imposes certain restrictions on the design of the external conductor for express control. In this regard, the consideration of half-open coaxial lines based on an external conductor in the form of longitudinal conducting rods is an urgent problem. The article proposes a method for calculating the wave impedance of a half-open coaxial line using a numerical calculation of electromagnetic fields. Based on the results of modeling Bragg microwave structures in a half-open coaxial line, recommendations are made for the construction of conversion elements based on them.