Impact of UAV structure on antenna radiation patterns at different frequencies

Rizwan, Asif; Biswas, Diptiman; Ramachandra, Vikas

doi:10.1109/iaim.2017.8402597

Cited by 9 publications

(5 citation statements)

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“…When the antenna is installed on the surface of the fuselage, the antenna patterns are affected considerably by the location of the antenna and direction of the main beam. 8 To minimize this effect, the antenna was installed on the narrow rear wing section of the UAV ( Figure 1A). To install the antenna to the UAV that is relatively small compared with the wavelength of the operating frequency band of 110-170 MHz (center frequency: 140 MHz, wavelength: 2142.9 mm), surface mount-type configuration of planer monopole antenna was adopted, and the feeding structure was transformed to a tapered structure for realizing wider bandwidth.…”

Section: Antenna Designmentioning

confidence: 99%

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Modified wideband monopole antenna for unmanned aerial vehicle communication

Lee

Woo

2020

Micro & Optical Tech Letters

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In this article, a novel surface-mounted type wideband monopole antenna for VHF band unmanned aerial vehicle (UAV) communication is presented. The proposed antenna constitutes a planar monopole structure such that taper-feeding configuration is adopted for wideband impedance matching and the radiation element of the antenna is formed on the vertical and horizontal parts of the narrow tail wing of the UAV to obtain monopole-like radiation pattern. After designing the antenna, simulation was performed in the VHF band of 0.11-0.17 GHz and the results showed the characteristics of the monopole. Because the antenna size of VHF band is too large to be tested, after 1/7 size scaling, the simulation and the measurement were performed in the frequency band of seven times the original band. The results show that the 10 dB return-loss band is 0.732-1.242 GHz (52.0%), the average gain in the H-plane is −0.23 dBi, and the radiation patterns are very similar to those of the monopole antenna.

show abstract

Section: Antenna Designmentioning

confidence: 99%

“…When the antenna is installed on the surface of the fuselage, the antenna patterns are affected considerably by the location of the antenna and direction of the main beam 8 . To minimize this effect, the antenna was installed on the narrow rear wing section of the UAV (Figure 1A).…”

Section: Antenna Designmentioning

confidence: 99%

Modified wideband monopole antenna for unmanned aerial vehicle communication

Lee

Woo

2020

Micro & Optical Tech Letters

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show abstract

“…One common assumption in all the works in [5]- [12], is that the UAV is assumed to have a perfect isotropic radiating antennas. However, in reality this is not true and several complications arise with UAV BSs as opposed to static BSs: a) The UAV altitude and heading changes depending on its mobility pattern, hence the antenna gain changes with the UAV location and orientation [13] b) The radiation pattern of the antenna mounted on UAV is affected by the chassis, and hence it is difficult to measure the actual antenna pattern while UAV is flying [14], [15]. The work in [16] has demonstrated that the 3D radiation pattern of an antenna mounted on a drone can significantly influence the RSS of the A2G link.…”

Section: Introductionmentioning

confidence: 99%

UAV-aided Wireless Node Localization Using Hybrid Radio Channel Models

Esrafilian¹,

Gangula²,

Gesbert³

2022

Preprint

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This paper considers the problem of ground user localization based on received signal strength (RSS) measurements obtained by an unmanned aerial vehicle (UAV). We treat UAV-user link channel model parameters and antenna radiation pattern of the UAV as unknowns that need to be estimated. A hybrid channel model is proposed that consists of a traditional path loss model combined with a neural network approximating the UAV antenna gain function. With this model and a set of offline RSS measurements, the unknown parameters are estimated. We then employ the particle swarm optimization (PSO) technique which utilizes the learned hybrid channel model along with a 3D map of the environment to accurately localize the ground users. The performance of the developed algorithm is evaluated through simulations and also real-world experiments.

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“…UAVs can accomplish extremely difficult or dangerous tasks for human beings, such as firefighting, disaster relief, and search and rescue [ 1 , 2 , 3 ]. Owing to UAVs’ ability to sense, monitor, and maneuver on a broader area within a short period of time, their use is becoming more popular in many applications [ 4 , 5 , 6 , 7 , 8 ]. UAVs have also played very significant roles in the face of the global COVID-19 pandemic.…”

Section: Introductionmentioning

confidence: 99%

Hybrid Path Planning for Efficient Data Collection in UAV-Aided WSNs for Emergency Applications

Poudel

Moh

2021

Sensors

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In unmanned aerial vehicle (UAV)-aided wireless sensor networks (UWSNs), a UAV is employed as a mobile sink to gather data from sensor nodes. Incorporating UAV helps prolong the network lifetime and avoid the energy-hole problem faced by sensor networks. In emergency applications, timely data collection from sensor nodes and transferal of the data to the base station (BS) is a prime requisite. The timely and safe path of UAV is one of the fundamental premises for effective UWSN operations. It is essential and challenging to identify a suitable path in an environment comprising various obstacles and to ensure that the path can efficiently reach the target point. This paper proposes a hybrid path planning (HPP) algorithm for efficient data collection by assuring the shortest collision-free path for UAV in emergency environments. In the proposed HPP scheme, the probabilistic roadmap (PRM) algorithm is used to design the shortest trajectory map and the optimized artificial bee colony (ABC) algorithm to improve different path constraints in a three-dimensional environment. Our simulation results show that the proposed HPP outperforms the PRM and conventional ABC schemes significantly in terms of flight time, energy consumption, convergence time, and flight path.

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Impact of UAV structure on antenna radiation patterns at different frequencies

Cited by 9 publications

References 0 publications

Modified wideband monopole antenna for unmanned aerial vehicle communication

Modified wideband monopole antenna for unmanned aerial vehicle communication

UAV-aided Wireless Node Localization Using Hybrid Radio Channel Models

Hybrid Path Planning for Efficient Data Collection in UAV-Aided WSNs for Emergency Applications

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