Wideband circularly polarized rectangular DRA fed with dual pair of right-angled microstrip line

Abstract

In this article, design and development of wideband circularly polarized (CP) rectangular dielectric resonator antenna (RDRA) is presented. To generate wideband CP in proposed antenna, different feeding mechanism have been studied. Three antenna configurations based on different feeding have been discussed using single and dual pair of microstrip lines aligned perpendicular to each other to generate orthogonal modes resulting in circular polarization. It has been claimed here that excitation of RHCP/LHCP field and its direction of radiation could be controlled using height of microstrip feed lines. Finally antenna configuration‐3 is fabricated and measured which shows 36.8% of input impedance bandwidth (3.48–5.05 GHz) and axial ratio bandwidth of 14.46% (3.67–4.24 GHz) in broadside direction (at Φ = 0°, θ = 0°). The final proposed structure exhibits consistent far‐field characteristics with average LHCP gain of 6.4 dB and almost stable radiation efficiency in entire operational frequency range. © 2016 Wiley Periodicals, Inc. Int J RF and Microwave CAE 26:713–723, 2016.

Circularly polarized rectangular DRA coupled through orthogonal slot excited with microstrip circular ring feeding structure for Wi-MAX applications

“…7,8 So far, there are two methods have been reported for the generation of CP in DRA, using single or dual/complex feeding techniques. [9][10][11] Compared with dual feeding technique, single feeding show more attention to the antenna designers because it easily reduces system complexity and also ability to enhance axial ratio bandwidth. To enlarge the CP bandwidth in DRA by using single feeding technique, several methods have been reported.…”

Wideband circularly polarized dielectric resonator antenna coupled with meandered-line inductor for ISM/WLAN applications

“…DRA offers several advantages like wide bandwidth, high radiation efficiency, compact size, low loss, flexible feeding mechanism, and various types shape . In DRA, CP can be achieved by introducing single and dual/complex feeding mechanism . In recent years, antenna engineers have been more focused on single feeding technique to generate wideband CP in a DRA.…”

“…[3][4][5][6] In DRA, CP can be achieved by introducing single and dual/ complex feeding mechanism. 7,8 In recent years, antenna engineers have been more focused on single feeding technique to generate wideband CP in a DRA. A single feeding technique offers cost effective and less complexity in antenna design and capable to generate wideband axial ratio (AR) bandwidth.…”

Circularly polarized rectangular dielectric resonator antenna fed with unequal parallel microstrip lines for Wi‐MAX applications

“…Recently, a significant of research has been carried out on DRAs using single and multiple feeds for realization of circular polarization . To excite orthogonal fields using microstrip lines various arrangements have been proposed in literature . In literature, generation of CP is also achieved by using single probe and deformed DR geometries .…”