A Null-Filled Axisymmetric Secant-Square-Shaped Beam Antenna for Unmanned Aerial Vehicles

Article Engineering, Electrical & Electronic

Compact Multimode Quadrifilar Helical Antenna for GNSS-R Applications

Ashifa M. Musthafa et al.

Summary: In this letter, a compact circularly polarized multimode antenna for global navigation satellite system reflectometry is presented. The antenna design provides broad beam coverage, high isolation, and high delay accuracy.

IEEE ANTENNAS AND WIRELESS PROPAGATION LETTERS (2022)

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Article Engineering, Electrical & Electronic

Wideband Isotropic Antenna With Miniaturized Ground for Enhanced 3 dB Coverage Ratio

Yongjian Zhang et al.

Summary: This paper proposes a wideband three-dimensional isotropic antenna with improved 3 dB coverage ratio. By investigating the impact of metallic ground size on isotropic radiation, a compact sequential-phase feeding network made of lumped components with miniaturized ground is elaborately designed to achieve wide operating bandwidth and enhanced 3 dB coverage ratio in 3-D space. The measurement results demonstrate that the proposed antenna provides a 6 dB gain variation fractional bandwidth of 4% and a 3 dB coverage ratio of more than 80%, indicating promising potential for wideband isotropic radiation applications.

IEEE ANTENNAS AND WIRELESS PROPAGATION LETTERS (2022)

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Article Engineering, Electrical & Electronic

A Wideband Monoconical Antenna for Airborne Applications With a Null-Filled Radiation Pattern

Wonkyo Kim et al.

Summary: This paper presents a wideband monoconical antenna with a null-filled radiation pattern for airborne applications. By using a proposed slotted structure, a rotating current distribution is formed to radiate an electric field at the null point of an omnidirectional radiation pattern. Experimental results show that the proposed antenna performs better than conventional monoconical and fan-dipole antennas used in airborne applications within the null-point frequency range.

IEEE ANTENNAS AND WIRELESS PROPAGATION LETTERS (2022)

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Article Engineering, Electrical & Electronic

Dual-Resonant Wideband Microstrip Annular Sector Patch Antenna With Increased Backfire Radiations

Jian Yu et al.

Summary: This paper proposes a novel design approach for wideband, dual-resonant microstrip annular sector patch antenna (MASPA), which allows for increased backfire radiation without the need for extra multiple radiators or additional reactance compensation techniques. By mathematically analyzing the dominant eigen-equation, the MASPA can be evolved from a truncated microstrip leaky-wave antenna. The relationships between the ratios of outer/inner radii, flared angles, and operational modes are deduced. The design technique is validated through the implementation of a dual-resonant MASPA with specific parameters.

IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION (2022)

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Article Engineering, Electrical & Electronic

Wideband Polarization Agile Dielectric Resonator Antenna With Reconfigurable Broadside and Conical Beams

Yuan Ji et al.

Summary: A new reconfigurable dielectric resonator antenna with multiple polarizations is presented in this study. The antenna is designed to operate in both unidirectional and omnidirectional modes and is capable of providing different phase distribution strategies. A prototype is fabricated and measured to validate the design.

IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION (2022)

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Article Engineering, Electrical & Electronic

Planar Dual-Mode Dipole Antenna Formed by Artificial Microstrip Arms Loaded With Multiple H-Slots for Broadband Operation of Vertically Polarized Radiation on UAV Platform

Hsi-Tseng Chou et al.

Summary: This article presents an antenna design for long-distance transmission in unmanned aerial vehicle (UAV) applications. The antenna utilizes dual-mode operations and has good polarized radiation and maximum gains. Using H-slot loaded microstrips for the dipole arms ensures good integration of both modes.

IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION (2022)

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Article Engineering, Electrical & Electronic

Omnidirectional Dual-Polarized Antenna Using Colocated Slots With Wedgy Profile

Yongjian Zhang et al.

Summary: This article presents an omnidirectional dual-polarized antenna with low windage within a wedge-profiled structure for supersonic onboard systems. The antenna design is based on aerodynamic analysis, with colocated slots for omnidirectional and dual-polarized radiation. The proposed antenna shows promising potentials in supersonic onboard communication systems, considering both electromagnetic and aerodynamic factors.

IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION (2021)

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Article Engineering, Electrical & Electronic