A Two Step Stair Shaped Dielectric Resonator Antenna with AMC for UWB Applications

This paper presents an ultra-wide band (UWB) antenna with two steps stair shaped dielectric resonator (SSDR) antenna. The two steps SSDR is placed precisely on the aperture to achieve an ultra-wide bandwidth of 136.2%. The first step of SSDR (DR1 and DR2) is fed directly by the microstrip line through aperture coupling technique whereas the second step (DR3) is a parasitic DR placed adjacent to DR1. The SSDR is radiating with TE(y)1 delta 1 - like mode at 5.32 GHz and TEx delta 11 - like mode at 6.3 GHz. The parasitic DR is improving the impedance matching and increasing the bandwidth by 11.3% due to the dielectric loading effect. Further a dual band artificial magnetic conductor (AMC) is placed below the UWB antenna to improve the antenna radiation characteristics. The improvement in average gain and gain variation is 36.7 % and 13.5% respectively. The antenna radiation efficiency is 81.6% with AMC reflectors.

Automated summary

This paper presents an ultra-wide band antenna with a two steps stair shaped dielectric resonator. The antenna achieves an ultra-wide bandwidth of 136.2% and improves its performance through the use of a parasitic resonator and an artificial magnetic conductor.