Design of an Endfire Microstrip Antenna for Aircraft Collision Avoidance System

De, Debajit; Sahu, Prasanna Kumar

doi:10.1109/lawp.2019.2907477

Cited by 8 publications

(3 citation statements)

References 15 publications

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“…Recent advances in the most cutting-edge engineering disciplines, such as tracking applications or collision avoidance systems, come along with the necessity of new millimeter-wave technologies and more compact antenna designs [1]- [2]. Millimeter-wave band applications require highly directive antenna beam patterns to compensate the large attenuation losses.…”

Section: Introductionmentioning

confidence: 99%

3D Printed Directive Beam-Steering Antenna Based on Gradient Index Flat Lens With an Integrated Polarizer for Dual Circular Polarization at W-Band

Melendro-Jimenez¹,

Tamayo‐Domínguez²,

Tamayo-Dominguez³

et al. 2023

IEEE Trans. Antennas Propagat.

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In this communication, the design of a circularly polarized perforated gradient index flat lens antenna with directive beam-steering properties is presented for millimeter-wave applications at W-band (75 -95 GHz). The dielectric lens, fed by an open-ended square waveguide located in the lens focal plane, enhances the radiation in a particular direction, generating a high-directivity beam with planar wavefront. The integration of a dielectric polarizer with the lens allows the conversion from a linearly polarized incident wave to a circularly polarized emitted wave over the whole bandwidth. Horizontally and vertically polarized waves, achieved by the excitation of the fundamental square waveguide TE01 and TE10 modes are transformed to left-hand circularly polarized and right-hand circularly polarized waves, respectively. A ±30º scan range in both azimuth and elevation planes is demonstrated for the whole frequency range, attained by displacing the feed along the focal plane of the lens. Lens and polarizer are manufactured as a single piece by stereolithography 3D printing technology with Form 3 Formlabs 3D-printer. Measured results show maximum measured directivity values that range from 23.5 to 23.8 dB, a remarkable circular polarization purity as a wide axial ratio bandwidth of 20.58% (< 3 dB), from 77.5 GHz to 95 GHz, is achieved for the principal beam steers and an aperture efficiency for broadside beam direction between 90.32% and 57.34% in the frequency band of interest.

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Section: Introductionmentioning

confidence: 99%

3D Printed Directive Beam-Steering Antenna Based on Gradient Index Flat Lens With an Integrated Polarizer for Dual Circular Polarization at W-Band

Melendro-Jimenez¹,

Tamayo‐Domínguez²,

Tamayo-Dominguez³

et al. 2023

IEEE Trans. Antennas Propagat.

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“…Traditional conflict detection and collision avoidance algorithms often rely on collaborative systems (e.g., traffic collision avoidance system (TCAS) [16]), or non-cooperative systems (e.g., stand-alone photoelectric sensors and airborne radars used for obstacle detection [17]). However, information provided by the TCAS and radars is generally two-dimensional and the maintenance cost is relatively high [18], [19]. Nevertheless, ADS-B messages obtained from the distributed ADS-B stations can provide a wealth of aerial vehicles-related information, and the maintenance cost of the ADS-B stations is much lower.…”

Section: Introductionmentioning

confidence: 99%

Machine-Learning-Aided Trajectory Prediction and Conflict Detection for Internet of Aerial Vehicles

Cheng

Guo

et al. 2022

IEEE Internet Things J.

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As exploitation of low and medium airspace for air traffic management (ATM) is gaining more attention, aerial vehicles' security issues pose a major challenge to the Air-Ground Integrated Vehicle Networks (AGIVN). Traditional surveillance technology lacks the capacity to support the intensive air traffic management (ATM) of the future. Therefore, an advanced automatic dependent surveillance-broadcast (ADS-B) technique is applied to track and monitor aerial vehicles in a more effective manner. In this paper, we propose a grouping-based conflict detection algorithm based on the preprocessed ADS-B dataset, and analyze the experimental results and visualize the detected conflicts. Then, in order to further improve flight safety and conflict detection, the trajectories of the aerial vehicles are predicted based on machine learning-based algorithms. The results are fed into the conflict detection algorithm to execute conflict prediction. It was shown that the trajectory prediction model using long short-term memory (LSTM) can achieve better prediction performance, especially when predicting the longterm trajectory of aerial vehicles. And the conflict detection results based on the trajectory prediction methods show that the proposed scheme can make it possible to detect whether there would be conflicts within seconds.

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“…An EBG structure is proposed in [7] to reduce mutual coupling between meanderline MIMO antennas. In [8] a conformal metamaterial lens-based radome is used to suppress surface waves which resulted in gain enhancement and reduction of side-lobes. A compact FSS multilayer structure composed of reactive impedance surfaces is used in [9] to convert linear into circular polarization.…”

mentioning

confidence: 99%

Effects of an FSS Reflector on a Microstrip Line Fed Bow-Tie Slot Antenna

Brito

Abreu

D’Assunção

et al. 2020

J. Microw. Optoelectron. Electromagn. Appl.

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This paper describes the analysis of the effects of a frequency selective surface (FSS) on the characteristics of a microstrip line fed antenna with a bow-tie slot in the ground plane for operation in the frequency range 1 to 10 GHz. The use of the FSS is proposed to miniaturize the antenna structure and increase the number of resonance frequencies and the gain. Air gaps can be inserted between the antenna and the FSS to allow for the adjustment of the resonance frequencies and increase the bandwidth. To prove the concept, antenna prototypes printed on a 30×30 mm 2 FR4 low-cost substrate are designed, fabricated and tested. Good agreement is obtained between numerical simulations and experimental results, thus validating the proposed design procedure. The obtained miniaturization and multiband effects can be most convenient for multiservice wireless system applications such as WLAN, WiMAX, 4G, and 5G mobile communication systems.

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Design of an Endfire Microstrip Antenna for Aircraft Collision Avoidance System

Cited by 8 publications

References 15 publications

3D Printed Directive Beam-Steering Antenna Based on Gradient Index Flat Lens With an Integrated Polarizer for Dual Circular Polarization at W-Band

3D Printed Directive Beam-Steering Antenna Based on Gradient Index Flat Lens With an Integrated Polarizer for Dual Circular Polarization at W-Band

Machine-Learning-Aided Trajectory Prediction and Conflict Detection for Internet of Aerial Vehicles

Effects of an FSS Reflector on a Microstrip Line Fed Bow-Tie Slot Antenna

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