Multichannel W-Band SAR System on a Multirotor UAV Platform With Real-Time Data Transmission Capabilities

Kim, Sumin; Jeon, Soo-Young; Kim, Jeongbae; Lee, Ui Min; Shin, Seungha; Choi, Yun Chang; Ka, Min Ho

doi:10.1109/access.2020.3014700

Cited by 15 publications

(6 citation statements)

References 42 publications

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“…[24, 25], or even relying on deep learning approaches as proposed in ref. [26]. Our synthesis method is direct, and can provide the array weighting coefficients for any value of P , as demonstrated in ref.…”

Section: Resultsmentioning

confidence: 99%

Design of Wide‐Beam Leaky‐Wave Antenna Arrays Based on the Bilinear Transformation of IIR Digital Filters and the Z Transform

Verdú‐Monedero,

Gómez‐Tornero,

Morales‐Sánchez

2023

Advcd Theory and Sims

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In the pioneering work, the radiation diagrams of leaky wave antenna arrays can achieve attenuation nulls and gains at specific angles by manually placing the zeros and the poles in the Z domain of the corresponding discrete linear time‐invariant (LTI) system. This handcrafted design procedure does not allow radiation diagrams with wide beams since the interaction between poles involved in the wide beam and their corresponding leaky modes cannot be easily handled. To overcome this limitation, this paper describes a novel method for designing radiation diagrams of leaky‐wave antenna arrays based on the theory of IIR discrete filters. The proposed method relies on the design of discrete filters with the prototypes of analog low‐pass filters defined by Butterworth and Chebyshev type I polynomials, whose roots along with the bilinear transformation provide the location of the poles and the zeros of the discrete LTI system and, therefore, the parameters of the leaky‐wave antenna array. Results with different designs and a comparison with other approaches show the utility and effectiveness of this novel method to design wide‐beam leaky‐wave antenna arrays.

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Section: Resultsmentioning

confidence: 99%

Design of Wide‐Beam Leaky‐Wave Antenna Arrays Based on the Bilinear Transformation of IIR Digital Filters and the Z Transform

Verdú‐Monedero,

Gómez‐Tornero,

Morales‐Sánchez

2023

Advcd Theory and Sims

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“…Low-frequency ultrawideband (UWB) millimeter radar has good penetration capacity and offers potential for imaging building interiors. Previous demonstrations of UAV SAR include the P, L, and C bands [212] for civil and deformation monitoring applications; X band [213] for calculating the scattering characteristics of complex targets; P and C bands for estimating the terrain height of a eucalyptus forest [214]; UWB [215] for snow coverage scanning; and W band [216] to minimize the size and weight of the hardware, among others, and different or full polarization combinations, e.g., horizontal and vertical backscatters.…”

Section: Sensors and Platformsmentioning

confidence: 99%

Close-Range Remote Sensing of Forests: The state of the art, challenges, and opportunities for systems and data acquisitions

Liang

Kukko

Balenović

et al. 2022

IEEE Geosci. Remote Sens. Mag.

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“…Local areas could also be monitored using drones or unmanned aerial vehicles (UAVs), which are easy-to-deploy and low-cost platforms for the investigation of remote scenes and local areas [33][34][35][36][37][38][39]. SAR systems on drones are usually equipped with radars with transmit signals spanning over multiple frequency bands and therefore leading to high resolutions.…”

Section: Introductionmentioning

confidence: 99%

Volume Structure Retrieval Using Drone-Based SAR Interferometry with Wide Fractional Bandwidth

Kim,

Krieger,

Villano

2024

Remote Sensing

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Synthetic aperture radar (SAR) interferometry (InSAR) is a well-established remote sensing technique capable of providing accurate topographic information of an area. Multiple scattering occurring at different heights within a single resolution cell, however, cannot be resolved using a single baseline and results in a degradation of the height accuracy. Techniques such as polarimetric InSAR and SAR tomography tackle this problem using additional measurements to obtain the three-dimensional structure of the volume. However, polarimetry-based methods assume orthogonal and deterministic scattering mechanisms and tomography requires numerous observations. This paper presents a novel approach to retrieving the three-dimensional structure of semitransparent media using wide fractional bandwidth InSAR. The frequency dependency of the InSAR coherence is exploited to retrieve the three-dimensional structure, assuming that signals with wide fractional bandwidth are available, as is the case for unmanned aerial vehicles (UAVs) or drones. As the extinction is, in general, frequency-dependent, a third observation may improve the inversion results. Simulations of different scenarios show that the frequency profile can be inverted to obtain information about the three-dimensional scattering structure. The acquired data also enable retrieval of the phase center depth as a function of frequency. This method allows for frequent and accurate monitoring of semitransparent targets, e.g., forests and vegetation, using a swarm of two or three drones.

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Multichannel W-Band SAR System on a Multirotor UAV Platform With Real-Time Data Transmission Capabilities

Cited by 15 publications

References 42 publications

Design of Wide‐Beam Leaky‐Wave Antenna Arrays Based on the Bilinear Transformation of IIR Digital Filters and the Z Transform

Design of Wide‐Beam Leaky‐Wave Antenna Arrays Based on the Bilinear Transformation of IIR Digital Filters and the Z Transform

Close-Range Remote Sensing of Forests: The state of the art, challenges, and opportunities for systems and data acquisitions

Volume Structure Retrieval Using Drone-Based SAR Interferometry with Wide Fractional Bandwidth

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