Wideband circularly polarized sectored conical dielectric resonator antenna excited by S‐shaped slot

Abstract

A conical sectored dielectric resonator antenna (DRA) loaded on S‐shaped slot square patch for wideband circular polarization is investigated. Wideband circular polarization (CP) is achieved by single tab extended at right top corner of the square patch along with the introduction of sectors on the top of DRA and S‐shaped slot on the patch. Calculated size of slot along with optimized height and size of DRA through parametric study helps to get wide impedance bandwidth. In addition, optimized size of single tab gives the wide axial ratio bandwidth. The −10 dB impedance bandwidth is 100.18% (2.1–6.0 GHz) and 3‐dB axial ratio (AR) bandwidth is 69.52% (3.0–6.2 GHz). The gain variation is around 3 dBi and radiation efficiency is around 80%–95% within the AR bandwidth. The proposed model is fabricated and measured which agree well with the simulated results.

Super‐wideband multi‐input–multi‐output dielectric resonator antenna

“…In this regard, the techniques have been reported to enhance the bandwidth of DRA like stacking [4,5] and inserting the air gap in the DR [6]. Besides these techniques, the wideband response was achieved by utilising the specific DR geometry like H-shaped [7], bow-tie [8], hemispherical with apollonian gasket structure [9], dumbbell [10], E-shaped [11], inverted umbrella [12] and conical [13][14][15].…”

A thin‐layer dielectric and metamaterial unit‐cell stack loaded miniaturized SRR‐based antenna for triple narrow band 4G‐LTE applications

“…3 The design of MIMO antenna with a shaped dielectric resonator (DR) solves the problem of achieving a low-frequency band of LTE band 12 and 17. 4 In such a design, a coaxial probe and microstrip line are employed simultaneously and placed in the close vicinity of the DR. [5][6][7] In addition to this, different shapes like C-shape, 8 F-shape, 9 sectored conical, 10 and tetraskelion 11 are either coupled with the feed line or placed above the slotted patch for wideband applications. Recently, dual-band antennas integrated into the last stage of the filter are being proposed for LTE systems.…”