BRAGG SENSORY MICROWAVE STRUCTURE ON COAXIAL CABLE

A. R. Nasybullin, O. G. Morozov, A. A. Sevastyanov
Kazan National Research Technical University named after A.N. Tupolev-KAI

 

The paper is received on March 24, 2014

 

Abstract. In the paper the structures of the Bragg microwave coax designed on the base of optical technologies transfer similar to fiber Bragg gratings are discussed. Methods of its analysis and the results of experimental studies are presented. Symmetric two-row and three-row structures are firstly described. It is shown that the Q-factor of the microwave Bragg structure on the design frequency increases with the order of resonance (at fold change of the structure length and period of its irregularities) and a number of rows. Approaches and options for the use of these structures in sensory applications are examined especially for measuring the temperature and the dielectric permittivity.

Keywords: microwave Bragg structure on coaxial cable, the method of wave transmission matrices, the method of directed graphs, two-row and three-row structure, spectral characteristics, sensor applications.