2019
DOI: 10.1002/mop.31917
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An umbrella‐shaped broadband circularly polarized antenna with wide beamwidth for global navigation satellite systems applications

Abstract: A novel umbrella‐shaped wideband circular polarization (CP) antenna with a wide half‐power beamwidth (HPBW) and a wide axial ratio (AR) bandwidth is proposed in this article. Two pairs of symmetrical patch dipoles are attached to the surface of an umbrella‐shaped substrate to broaden both the impedance bandwidth (IBW) and the HPBW. A parasitic metallic ring is located immediately above the umbrella substrate to provide further enhancement of the HPBW. Each patch dipole is excited via a coaxial line, while a co… Show more

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Cited by 4 publications
(2 citation statements)
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“…The antenna operates within the frequency band of 3.1-10.6 GHz. Yan et al [8] proposed a circularly polarized wideband umbrella-shaped patch antenna by modifying an elliptical-shaped radiator. Likewise, utilizing different slotted geometry over the patch and ground layer of umbrella-shaped antenna designs in [9] and [10], a wide operational bandwidth of 3.1-13.4 GHz, and 7.5-12.5 GHz is retained, respectively.…”
Section: Introductionmentioning
confidence: 99%
“…The antenna operates within the frequency band of 3.1-10.6 GHz. Yan et al [8] proposed a circularly polarized wideband umbrella-shaped patch antenna by modifying an elliptical-shaped radiator. Likewise, utilizing different slotted geometry over the patch and ground layer of umbrella-shaped antenna designs in [9] and [10], a wide operational bandwidth of 3.1-13.4 GHz, and 7.5-12.5 GHz is retained, respectively.…”
Section: Introductionmentioning
confidence: 99%
“…This significant HPBW of nearly 120°, wide ARBW and IBW is attained due to inverted L-shaped structures and defects in the ground. Recently to achieve the wide HPBW and IBW, Yan et al [17] proposed an umbrella-shaped CP antenna consisting of two couples of identical patch dipoles connected to an umbrella-shaped material (substrate). To increase the HPBW further (more than 120°), a freeloading metallic ring is placed just on top of this material substrate.…”
Section: Introductionmentioning
confidence: 99%