Abstract-In this communication, a dual-sense dual-polarized hybrid rectangular dielectric resonator antenna (RDRA) is explored. Two leading aims of the present article include: (i) to obtain dualpolarization characteristics, i.e., the combination of linear and circular polarizations; (ii) to achieve quad-band features by using the concept of hybrid antenna. Modified printed line is used to excite dual radiating modes in RDRA, i.e., TE x δ11 and TE y 1δ1 . In order to authenticate the proposed radiator, archetype of the proposed antenna is fabricated and tested. Good accord is established between measured and simulated outcomes. The proposed radiator is operated over four different frequency bands, i.e., 1.81 GHz-2.06 GHz, 2.37 GHz-2.7 GHz, 3.35 GHz-4.4 GHz, and 4.62 GHz-5.62 GHz. Left Hand Circularly Polarized (LHCP) and Right Hand Circularly Polarized (RHCP) waves are obtained form 4.1-4.39 GHz and 4.78-5.2 GHz respectively. All these properties of the proposed radiator make it appropriate for 3G/WLAN/WiMAX applications.
In this communication, conceptual design guidelines for a tri-band dual sense circularly polarized ceramic-based antenna is explored. An asymmetrical S-shaped aperture is used to stimulate the ring-shaped ceramic. Some exclusive features are obtained in the designed antenna: (i) creation of five different hybrid modes (HEM 11δ , HEM 11δ+2 , HEM 12δ-like , HEM 12δ , and HEM 13δ ) is helpful for getting dual wideband impedance bandwidth; (ii) proposed aperture assists in achieving CP waves in three different frequency ranges with two different senses. Its experimental results confirm the simulated outcomes. The proposed antenna is operated within the dual-frequency ranges, i.e., 2.2-4.19 GHz and 4.74-6.11 GHz, respectively. The measured 3-dB axial ratio is achieved in three different frequency ranges within the operating band, i.e., 2.71-2.98 GHz, 3.6-3.79 GHz, and 5.5-5.81 GHz, respectively. The proposed antenna design is left-handed circularly polarized (LHCP) in the first and third frequency ranges, while it is right-handed in the second one. These features, along with broadsided far-field patterns, recommend the proposed antenna design for potential application in WLAN (2.4/5.5 GHz) and WiMAX (3.3/5.0 GHz) wireless networks.
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