Stacked rectangular dielectric resonator antenna with different volumes for wideband circular polarization coupled with step‐shaped conformal strip

Abstract

This paper presents a wideband circularly polarized broadside radiation characteristics by using stacked rectangular dielectric resonator antenna (DRA) with different volumes. In this designed antenna, the wide input impedance-and axial ratio (AR)bandwidths come from three factors: stacked rectangular DR with different volumes, stepped-shaped conformal strip associated with microstrip line as a feed and different type of partial ground plane. Here, the orthogonal TE x δ11 and TE y 1δ1 modes have been responsible for the generation of CP radiation in stacked rectangular DRA. Measured results show that the proposed stacked rectangular DRA with different volumes achieves input impedance bandwidth of 54.84% while AR bandwidth has been found to be 11.53%. The proposed antenna provides broadside righthanded CP radiation pattern with gain ranges from 2.27-5.80 dBic and offers an average radiation efficiency of 89.48%, across the entire working bandwidth, respectively. Therefore, this antenna is very much useful for the ISM 2400 band applications.

A compact Ultra Wideband dielectric resonator antenna with dual‐band circular polarization characteristics

“…Axial ratio (AR), which is by far the most popular parameter for measuring the purity of circular polarization, is the ratio of the major to the minor axes of the polarization ellipse, traced out by the tip of the electric field vector, measured along the boresight of the proposed antenna, that can be obtained from the well‐known Equation () 13 . Where E max and E min represent the length of the major and the minor axes of the polarization ellipse, respectively. …”

“…In recent years, also the concept of circular polarization has received significant attention due to its attractive features such as insensitivity toward equipment's orientation, suppression of multipath fading, and resistance to the inclement weather conditions 12‐14 …”

A chronological review of circularly polarized dielectric resonator antenna: Design and developments

“…This section highlights the state‐of‐the‐art developments of CPDRA using single point feed 11‐64 and multi‐point feed power divider, 65‐76 along with modification of three dimensional DR shapes 77‐103 . In this review article, the authors have segregated CP mechanism in terms of excitation of feeding techniques like microstrip line, coaxial probe, and aperture coupled feed, which will be helpful to the researcher to get the complete idea about the developments of particular excitation feeding method …”

“…This leads in generating of the orthogonal modes needed for CP excitation. This section highlights the rapid development of CPDRA using modified DR structure utilizing different feeding mechanism such as microstrip line feed, coaxial probe feed and aperture coupled feed 77‐103 …”

Broadband circularly polarized dielectric resonator antenna with L‐shaped dielectric resonator strips

“…In order to improve the CP bandwidth of DRAs with single‐feed structure, many single‐feed methods are reported in References 8‐20, which involves coaxial‐probe feeding, 8 microstrip‐line feeding, 9,10 a stair‐shaped microstrip‐line feeding, 11 stepped‐shaped conformal strip‐line feeding, 12 and slot‐coupled feeding, 12‐15 such as asymmetrical U‐slot 13 Archimedean spiral slot 14 et. In Reference 16, 3‐dB axial ratio bandwidth (ARBW) of 21.5% could be obtained by using an inclined slot to feed a trapezoidal DRA.…”