Wideband Printed Half Bow-Tie Antenna Array Based on a Quad-Mode Reconfigurable Feeding Network for UAV Communications

Jeong, Ye-Yeong; Lee, Wang‐Sang

doi:10.1109/ojap.2021.3057067

Cited by 12 publications

(10 citation statements)

References 30 publications

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“…In general, two methodologies are commonly followed. On the one hand, reconfigurable radiators as in [4], [5], [6] and, on the other hand, complex reconfigurable feeding networks as in [7], [8], [9]. In general terms, these patch-based contributions suffer from low antenna efficiency.…”

Section: Introductionmentioning

confidence: 99%

Switchable T-Slot for Dual-Circularly-Polarized Slot-Array Antennas in Ka-Band

Ferrando-Rocher

Herranz-Herruzo

Valero‐Nogueira

et al. 2021

Antennas Wirel. Propag. Lett.

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This paper presents two slotted array antennas working in the Ka-band with switchable circular polarization capability. The first prototype is a series-fed slotted-waveguide linear array composed of ten T-shaped slots. The second antenna is a two-dimensional array with 2×2 T-shaped slots fed by a corporate distribution network. In both cases, a reflection coefficient below −10 dB has been experimentally observed within the targeted frequency band between 29.5 and 30.5 GHz. Good polarization purity is achieved for both polarization senses and in both prototypes. The fundamental contribution of the paper is to propose a simple mechanism to switch the circular polarization sense in a low-cost, low-profile and high-efficient antenna. The design and experimental results confirm that the solution is suitable for both one-and two-dimensional arrays in the millimeter-wave band.

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Section: Introductionmentioning

confidence: 99%

Switchable T-Slot for Dual-Circularly-Polarized Slot-Array Antennas in Ka-Band

Ferrando-Rocher

Herranz-Herruzo

Valero‐Nogueira

et al. 2021

Antennas Wirel. Propag. Lett.

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“…UAVs are used to carry out a variety of missions such as environmental monitoring, agricultural plant protection, and aerial photography, which leads to a worldwide upsurge of research in this field [1][2][3]. Unmanned aerial vehicles usually need to communicate with ground controllers [4,5]. Therefore, the antenna for UAVs should possess a horizontal omnidirectional radiation pattern and vertical polarisation, which guarantees that UAVs receive the signal from ground controllers in any direction.…”

Section: Introductionmentioning

confidence: 99%

A low‐profile dual‐mode antenna for unmanned aerial vehicles applications

Zhang

Sun

Huang

2022

IET Microwaves Antenna & Prop

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A low‐profile dual‐mode antenna is proposed in this paper. The antenna is composed of a semi‐rectangular‐annular (SRA) coaxial line with sleeve loading structures vertically mounted on the ground plane. The proposed antenna has two radiation modes, mode 1 of the vertically polarised (VP) radiation characteristics at 500 MHz and mode 2 of the horizontally polarised (HP) radiation characteristics at 588 MHz. The two vertical components of the SRA coaxial line contribute to the VP radiation, which is achieved with the in‐phase electric currents on the two vertical components by adjusting the length of the in‐body inductive loading structures. The horizontal component of the SRA coaxial line is mainly contributed to HP radiation when the electric currents on two vertical components are reversed. And the antenna is well matched with the additional impedance matching network, which consists of two inductors and a capacitor. The height of the fabricated prototype is only 25.9 mm (about 0.04λ) at 500 MHz. The fabricated prototype possesses monopole‐like radiation pattern at 500 MHz and loop‐antenna‐like radiation pattern at 588 MHz. The measured maximum gain of the proposed antenna at 500 MHz is −6.8 dBi, and the measured maximum gain of the proposed antenna at 588 MHz is 2.5 dBi. The antenna is suitable for unmanned aerial vehicles communication systems due to its advantages of low‐profile and dual‐mode radiation.

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“…Thus, they might not be suitable for the UAV applications requiring high directivity reconfigurable beam patterns. Although some reconfigurable pattern antennas with Yagi-Uda dipoles [18], half bow-tie [19], magnetic dipole [20] and planar super Jpole [21] structures have been also investigated for UAV applications, they provide LP patterns only or relatively low directivity. Therefore, to satisfy all dual-CP, high directivity and reconfigurable pattern performances, a switched-angle antenna module including both feed and control networks is proposed for UAV applications in this paper.…”

Section: Introductionmentioning

confidence: 99%

Reconfigurable Antenna for UAV-Assisted Wide Coverage Air-to-Ground Communications

2022

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A wide-coverage unmanned aerial vehicle (UAV) antenna system for air-to-ground communications is proposed in this paper. The proposed antenna system has reconfigurable beam patterns based on five sets of dual-polarization and high gain antennas. Each antenna set is configured by a dualpolarization crossed inverted-V radiator and switched feed network to drive switched beamforming operations. Depending on the switch modes of the proposed antenna, main beam direction and circular polarization types can be independently selected. Further, each antenna set is faced toward the ground level at different angles from the center of UAV to provide wide beam coverage. To verify the antenna performance, each antenna set is designed at the center frequency of 5.7 GHz and total five sets are integrated with a switched feed network and a microcontroller. To implement the wide angle switched beamforming with 2-D angle-shifted main beams, a 3-D printed conformal fixture is used to connect both the antenna module and a drone body. The maximum measured bandwidth was more than 22% and the measured peak gain with the de-embedded switch feed network loss was about 10.2 dBic.

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Wideband Printed Half Bow-Tie Antenna Array Based on a Quad-Mode Reconfigurable Feeding Network for UAV Communications

Cited by 12 publications

References 30 publications

Switchable T-Slot for Dual-Circularly-Polarized Slot-Array Antennas in Ka-Band

Switchable T-Slot for Dual-Circularly-Polarized Slot-Array Antennas in Ka-Band

A low‐profile dual‐mode antenna for unmanned aerial vehicles applications

Reconfigurable Antenna for UAV-Assisted Wide Coverage Air-to-Ground Communications

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