Title :
Dielectric loaded tm01 to te11 mode converter for S-band applications
Author :
Chittora, Ashish ; Mukherjee, Jayanta ; Singh, Sandeep ; Sharma, Archana
Author_Institution :
Electr. Eng. Dept., Indian Inst. of Technol. Bombay Mumbai, Mumbai, India
Abstract :
In this paper, a compact, high efficiency TM01 to TE11 mode converter is presented. In the proposed structure, dielectric material is loaded below a tapered centre conductor, in lower section of a circular waveguide. The input TM01 mode is initially transformed to TEM mode by the tapered centre conductor. The loaded dielectric material is designed to provide the desired phase shift for the mode conversion. Different dielectric materials are analyzed for loading to achieve high conversion efficiency and wide bandwidth. The proposed mode converter is fabricated with PTFE as dielectric for mode conversion and the results are verified through far field radiation pattern measurements. The mode conversion efficiency is more than 90% for 2.95-3.60 GHz band. Due to compactness and high conversion efficiency for wide bandwidth, it is suitable for S-band high power microwave (HPM) applications.
Keywords :
circular waveguides; conductors (electric); dielectric materials; dielectric-loaded waveguides; power convertors; pulsed power technology; HPM application; PTFE; S-band high power microwave application; TEM mode; circular waveguide; dielectric loaded mode converter; dielectric material; far field radiation pattern measurement; frequency 2.95 GHz to 3.60 GHz; tapered centre conductor; Bandwidth; Conductors; Dielectric materials; Dielectrics; Electric fields; Loading; Mathematical model; Dielectric loaded waveguides; microwave propagation; pulse power system;
Journal_Title :
Dielectrics and Electrical Insulation, IEEE Transactions on
DOI :
10.1109/TDEI.2015.005038
