Millimetre wave textile integrated waveguide beamforming antenna for radar applications

Alonso, Leticia; Hoeye, S. Ver; Fernández, M.; Vázquez, C.; Camblor, R.; Hotopan, George; Hadarig, Andreea; Las-Heras, Fernando

doi:10.1109/gsmm.2015.7175440

Cited by 11 publications

(5 citation statements)

References 10 publications

(8 reference statements)

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“…A waveguide slot antenna made of a textile-filled waveguide is presented in [12], but the waveguide walls are made of copper foil, which is impractical for wearable applications. The application of surface-integrated waveguides (SIWs), adapted for textiles as textile-integrated waveguides (TIWs) [13][14][15][16][17], has also been proposed. A TIW comprises three layers: the top and bottom conductive layers are typically constructed from conductive fabric, while the central dielectric layer typically consists of traditional materials such as wool felt or polyester-based textile.…”

Section: Introductionmentioning

confidence: 99%

Design and Realization of Wearable Textile Slotted Waveguide Antennas

Mikulić,

Šopp,

Bonefačić

et al. 2023

Sensors

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The design of wearable antennas presents a challenge from multiple perspectives, as they must meet technical requirements and satisfy safety standards while also being suitable for integration into clothing and aesthetically pleasing. In recent years, the development of conductive fabrics has, in many ways, allowed for significant progress in the manufacturing of wearable antennas, and in previous work, we developed textile slotted waveguide antennas using conductive textiles and traditional sewing processes. However, various aspects of the design and realization of such antennas remain challenging. In particular, this work investigates the issue of using foam-based molds, which enables the realization of thin, flexible, wearable antennas, as well as the issue of antenna feed, specifically the transition from a classic coaxial transmission line to a waveguide. The design of the transition was focused on simplicity and robustness, due to which we limited the number of degrees of freedom in the design process in order to achieve a structure suitable for mounting on textile waveguide antennas. In addition, the antenna design procedure and the body-channel model were considered in order to optimize the performance of the antennas and the wireless body-centric system itself. Several prototypes of different kinds were developed in the 5.8 GHz ISM band, confirming the feasibility of the proposed concepts through experimental results.

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Section: Introductionmentioning

confidence: 99%

Design and Realization of Wearable Textile Slotted Waveguide Antennas

Mikulić,

Šopp,

Bonefačić

et al. 2023

Sensors

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“…Even though, the integration of the antenna into a single textile structure can contribute to an easier and faster industrial manufacturing process, and can also reduce the incurrences due to the hand-made manufacturing process. This concept was already presented in [ 15 , 16 , 17 ].…”

Section: Introductionmentioning

confidence: 99%

Textile Antenna for Bio-Radar Embedded in a Car Seat

et al. 2021

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A bio-radar system is presented for vital signs acquisition, using textile antennas manufactured with a continuous substrate that integrates the ground plane. Textile antennas were selected to be used in the RF (Radio Frequency) front-end, rather than those made of conventional materials, to further integrate the system in a car seat cover and thus streamline the industrial manufacturing process. The development of the novel substrate material is described in detail, as well as its characterization process. Then, the antenna design considerations are presented. The experiments to validate the textile antennas operation by acquiring the respiratory signal of six subjects with different body structures while seated in a car seat are presented. In conclusion, it was possible to prove that bio-radar systems can operate with textile-based antennas, providing accurate results of the extraction of vital signs.

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“…10 In, 11 the research reported four beam SIW slotted antenna array with À20 -+20 beam scanning. The textile integrated waveguide (TIW) beamforming antenna is reported in, 12 90 twisted SIW multibeam antennas are presented in 13 where beam scanning is achieved through four 90 twisted SIW in which the two horizontal couplers fed vertical couplers. The frequency agile SIW slot antenna is presented in 14 to solve the problem of uniconductor SIW, which could not be used for electronically tunable applications, the top metallic layer consisting of a single slot.…”

Section: Introductionmentioning

confidence: 99%

Circularly polarized hybrid mode substrate integrated waveguide antenna for two quadrant scanning beamforming applications for 5G

Verma

Raghava

2021

Int J RF Microw Comput Aided Eng

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Electromagnetic band gap (EBG) based two ports multiple-input and multipleoutput (MIMO) substrate integrated waveguide (SIW) antenna for two quadrant beamforming applications using metasurfaces (MS) is addressed. A novel SIW structure is employed to achieve beamforming. This work comprises two types of vias having different diameters and lengths in order to achieve multibeam in the first and second quadrant with 120 coverage. Two cross slots tilted at AE45 are etched on top of the structure. The width variation of one of the cross slots achieved beam scanning in first quadrant with coverage of 90 . Additionally, four circular slots are etched on the top metallic layer to improve the axial ratio and the gain of the antenna. Apart from that, two diagonally etched slots help to enhance the gain and radiation properties of the antenna. Furthermore, to get the good mutual coupling and isolation between the two ports, EBG unit cells are deployed on the ground. The proposed antenna shows good right hand circularly polarized radiation within the band with the help of MS deployed on an extended part of the substrate. MS also improves the return loss bandwidth. In the end, the diversity properties of the MIMO have been studied as well. The proposed antenna shows good performance in all respects for 5G applications.

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Millimetre wave textile integrated waveguide beamforming antenna for radar applications

Cited by 11 publications

References 10 publications

Design and Realization of Wearable Textile Slotted Waveguide Antennas

Design and Realization of Wearable Textile Slotted Waveguide Antennas

Textile Antenna for Bio-Radar Embedded in a Car Seat

Circularly polarized hybrid mode substrate integrated waveguide antenna for two quadrant scanning beamforming applications for 5G

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