Optimum design of inserted segment (IS) in multi-segment dielectric resonator antenna (MSDRA)

This paper introduces a simple method for optimum design of IS in MSDRAs. It is assumed that IS acts like an impedance transformer between the feedline and the main segment. The method avoids former time-consuming trial and error for achievement of optimum dielectric constant and thickness of IS, and directly gives these parameters in which best possible bandwidth and feedline-MSDRA coupling is attained. To show the efficiency of the proposed method, many examples are examined and numerical and experimental results are presented.