FSS-based dual-band cassegrain parabolic antenna for RadarCom applications

Brandão, T. H.; Filgueiras, H.R.D.; Cerqueira, S. Arismar; Mologni, Juliano Fujioka; Bogoni, Antonella

doi:10.1109/imoc.2017.8121131

Cited by 10 publications

(9 citation statements)

References 10 publications

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“…The current manuscript represents an extension of two previous works from our research group [12], [13], which reported numerical and preliminary experimental results of a dual-band Cassegrain parabolic antenna based on frequency selective surfaces (FSS), designed to simultaneously operate at 2.525 and 9.925 GHz [19]. Here, we present the antenna full characterization and application in conjunction with a photonic-based radar transceiver, previously proposed by our group [5], for multiple radar detections of helicopters and airplanes in the S-and X-bands.…”

Section: Introductionmentioning

confidence: 98%

“…The FSS properties can be varied by choosing the element type, dimensions and volumetric structure, as well as the dielectric material electromagnetic properties [21]. In dual-reflector systems, a FSS can be applied to the subreflectorin order to combine focal-point and Cassegrain parabolic antennas into a single structure [12], [13], [23].…”

Section: Introductionmentioning

confidence: 99%

“…The final antenna dimensions were: F = 77.1 cm; L = 30.84 cm; D = 29.14 cm. The FSS-based subreflector design has been conducted aiming to obtain a band-reject filter[12]-[13], by considering the following parameters: dipole length (ld) and width (td); spacing between elements (delements); Arlon Diclad 880 dielectric constant r = 2.2 and thickness h = 1.6 mm. The FSS cell has been designed considering the average relative permittivity ef = 1.60, since the EM wave travels in either air and dielectric substrate.…”

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confidence: 99%

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Dual-band System composed by a Photonics-based Radar and a Focal-Point/Cassegrain Parabolic Antenna

Brandão

Filgueiras

Alves

et al. 2018

J. Microw. Optoelectron. Electromagn. Appl.

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This work reports a dual-band radar system composed of aphotonics-based transceiver and a unique dual-band antenna. The proposed antenna consists of an integration of conventional focal-point and Cassegrain parabolic antennas in the same structure, ensured by using a subreflector based on a frequency selective surface. Numerical and experimental results in terms of the antenna reflection coefficient, radiation pattern and gain are reported with excellent agreement over both frequency ranges. The innovative dual-band photonics-based radar transceiver operates simultaneously in the Sand X-bands. The radar system has been properlyvalidated by multiple detections of helicopters and airplanes in real conditions.

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Section: Introductionmentioning

confidence: 98%

Section: Introductionmentioning

confidence: 99%

mentioning

confidence: 99%

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Dual-band System composed by a Photonics-based Radar and a Focal-Point/Cassegrain Parabolic Antenna

Brandão

Filgueiras

Alves

et al. 2018

J. Microw. Optoelectron. Electromagn. Appl.

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“…FSS applications cover a wide range of the electromagnetic spectrum, from microwave to terahertz. These applications include dual-band operating antennas [3], [4], [14], [15], reconfigurable antennas [5], [6], sensors [17], [18], optimization efficiency of communication systems [8] - [11] and energy harvesting [19]. Basically, the frequency response of the FSS is determined by the characteristics of the dielectric, the unit cell geometry, the periodicity of the FSS, and the incident wave polarization, Fig.…”

Section: Introductionmentioning

confidence: 99%

Triple Band Reject Frequency Selective Surface with Application to 2.4 GHz Band

Neto

Silva

Coutinho

et al. 2020

JCIS

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This paper presents the development of a frequency selective surface, FSS, with three bands of rejection, with the central bandwidth applied to the 2.4 GHz frequency band. Despite the fact that the main applications are in the 2.4 GHz frequency band, as emphasized in this paper, to reduce costs with scale production, it is interesting to note when the same FSS can be used for different applications such as wireless and cellular communications (1.71 GHz-1.93 GHz) and radio frequency localization (3.1 GHz-3.3GHz). The three rejection bands are obtained from the association of crossed-dipoles and matryoshka ring geometries. For each geometry the initial design equations are proposed. The procedure to obtain the matryoshka geometry is described step by step. Numerical results are presented for each geometry, and also to the associated geometries, considering different incident angles (θ=0°, 15°, 30° and 45°). The current distribution of each resonant frequency was shown, making it possible to visualize the respective excited geometry. After the numerical results, we verified that the resonant frequencies associated to the respective geometry remained practically unchanged even for the associated geometries. A FSS prototype with the associated geometries was designed, fabricated, and characterized, with a very good agreement between numerical and experimental results, obtaining an attenuation of at least 15 dB in the 2.4 GHz frequency band.

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“…As aplicações das FSS abrangem uma ampla faixa do espectro eletromagnético, desde as ondas milimétricas até terahertz. Entre essas aplicações, podem ser citadas as antenas com banda dupla de operação [3], [4], [10], [11], antenas reconfiguráveis [5], [6], sensores [12], [13], otimização da eficiência dos sistemas de comunicação [7]- [9] e colheita de energia (energy harvesting) [14]. Basicamente, a resposta em frequência da FSS é determinada pelas características do dielétrico, pela geometria da célula unitária, pela periodicidade da FSS e pela polarização da onda incidente, Figura 1.…”

Section: Introductionunclassified

Superfície Seletiva em Frequência com Três Bandas de Rejeição com Aplicação à Faixa de 2,4 GHz

Neto¹,

Silva²,

Coutinho³

et al. 2019

Anais De XXXVII Simpósio Brasileiro De Telecomunicações E Processamento De Sinais

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Resumo-Este artigo apresenta o desenvolvimento de uma superfície seletiva em frequência, FSS, com três bandas de rejeição, com a banda central aplicada à faixa de frequência de 2,4 GHz. As três bandas de rejeição são obtidas a partir da associação das geometrias dipolos cruzados e anel matrioska. Para cada geometria são propostas as equações iniciais de projetos e apresentados resultados numéricos. Foi projetada, fabricada e caracterizada experimentalmente uma FSS com a geometria proposta, verificando-se uma concordância muito boa entre os resultados numéricos e experimentais, obtendo-se uma atenuação de no mínimo 15 dB na faixa de frequência de 2,4 GHz.

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FSS-based dual-band cassegrain parabolic antenna for RadarCom applications

Cited by 10 publications

References 10 publications

Dual-band System composed by a Photonics-based Radar and a Focal-Point/Cassegrain Parabolic Antenna

Dual-band System composed by a Photonics-based Radar and a Focal-Point/Cassegrain Parabolic Antenna

Triple Band Reject Frequency Selective Surface with Application to 2.4 GHz Band

Superfície Seletiva em Frequência com Três Bandas de Rejeição com Aplicação à Faixa de 2,4 GHz

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