Triple-Band Dual-Sense Circularly Polarized Hybrid Dielectric Resonator Antenna

Abstract

In this paper, a triple-band dual-sense circularly polarized (CP) hybrid dielectric resonator antenna is proposed. A modified hexagonal dielectric resonator (DR) is top-loaded with a square microstrip ring (SMR). A vertical-tapered-strip connected to a 50-Ω microstrip line is used to excite the proposed antenna. It is found that the lower and central CP bands correspond to left-handed circular polarization and are produced by the TM11 and TE111 modes of the SMR and modified hexagonal DR, respectively. The upper CP band is formed by the combination of the quasi-TM21 mode of the SMR and quasi-TE111 mode of the DR that exhibits right-handed circular polarization. The measurement results of the fabricated prototype show triple-band response for |S11|< −10 dB with impedance bandwidths (IBWs) of 17.4% (1.75–2.03 GHz), 28.13% (2.23–2.96 GHz), and 2.97% (3.65–3.76 GHz) in the lower, central, and upper bands, respectively. The measured 3 dB axial ratio bandwidths lying within −10 dB IBWs are 3.69% (1.86–1.93 GHz), 5.46% (2.67–2.82 GHz), and 2.15% (3.68–3.76 GHz) along with the peak gains of 5 dBic, 5.28 dBic, and 2.36 dBic in the lower, central, and upper bands, respectively.

Higher-Order-Mode Triple Band Circularly Polarized Rectangular Dielectric Resonator Antenna

“…Over the past few decades, the dielectric resonator antenna (DRA) has been the center of attention among antenna researchers. This is due to the prominent features of DRA over the microstrip patch such as high radiation efficiency, high gain, less metallic loss, wide bandwidth, lightweight, and tunable far-field pattern due to several modes in DRA [1][2][3]. The DRAs can be designed in various shapes; however, basic shapes such as rectangular and cylindrical shapes are preferred because of their low cost and ease of fabrication.…”

“…The mode degeneracy is disfavourable as it increases the cross-pol levels of an antenna and hence limits the antenna performance [5]. On the other hand, considerable attention had focused on the DRAs with circular polarization (CP) as they offered a better quality of signals, alleviate fading and multipath, insensitive to polarization mismatch, which makes them more suitable for wireless communication systems than the linearly polarized (LP) antenna [3,[6][7][8][9][10].…”

Compact circularly polarized triband staired rectangular dielectric resonator antenna using single and dual sections WPD with phase shifter for navigation satellite applications

“…In modern wireless communication technology, small size, low profile, wider bandwidth, high radiation efficiency, better circular and linear polarization, multiple frequency, and multiple polarization antennas are achieving more attraction for wireless communication system such as satellite, mobile, radar, medical, missile, and other wireless communication system . The dielectric resonator antennas (DRAs) are attractive because of low loss, high radiation efficiency, wider impedance bandwidth, and simple feeding network compare to the microstrip antennas . For navigation satellite applications, circularly polarized (CP) antennas are used to enhance the system performance and reduce the effects of multipath interferences .…”

“…2,3 For navigation satellite applications, circularly polarized (CP) antennas are used to enhance the system performance and reduce the effects of multipath interferences. 2,3 Compact DRAs are obtained using high dielectric constant material and optimized aspect ratios of dielectric resonator. 6,7 Design of CP dielectric resonator antenna using wideband feed network was reported at center frequency of 6.5 GHz with ground plane footprint area 42 × 42 mm 2 .…”

“…The dielectric resonator antennas (DRAs) are attractive because of low loss, high radiation efficiency, wider impedance bandwidth, and simple feeding network compare to the microstrip antennas . For navigation satellite applications, circularly polarized (CP) antennas are used to enhance the system performance and reduce the effects of multipath interferences . Compact DRAs are obtained using high dielectric constant material and optimized aspect ratios of dielectric resonator .…”