Study of THz-Plasmon hybridization of a loop Yagi-Uda absorber

Pattanayak, Arnab; Roy, Sandipta; Rana, Goutam; Duttagupta, Siddhartha P.; Achanta, Venu Gopal; Prabhu, S. S.

doi:10.1038/s41598-017-17311-3

Cited by 7 publications

(4 citation statements)

References 46 publications

(27 reference statements)

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“…Through pyramiding three major QTLs, the BC 1 F 8 line gained approximately 35% resistance when compared to the B. napus parent (Mei et al 2020 ). Another strong source of resistance to SSR was found in Brassica fruticulosa (Rana et al 2017 ). Subsequently, this resistance was transferred into a susceptible B. juncea genotype, producing introgressed lines with increased resistance, with a reduced lesion size of up to 69%.…”

Section: Useful Traits Identified In Brassica Crops and Wild Alliesmentioning

confidence: 99%

“…Subsequently, this resistance was transferred into a susceptible B. juncea genotype, producing introgressed lines with increased resistance, with a reduced lesion size of up to 69%. From the introgressed material it was also possible to select euploid and high pollen fertility lines, making it an excellent source to be utilized in future breeding programs (Rana et al 2017 ).…”

Section: Useful Traits Identified In Brassica Crops and Wild Alliesmentioning

confidence: 99%

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Using wild relatives and related species to build climate resilience in Brassica crops

et al. 2021

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Climate change will have major impacts on crop production: not just increasing drought and heat stress, but also increasing insect and disease loads and the chance of extreme weather events and further adverse conditions. Often, wild relatives show increased tolerances to biotic and abiotic stresses, due to reduced stringency of selection for yield and yield-related traits under optimum conditions. One possible strategy to improve resilience in our modern-day crop cultivars is to utilize wild relative germplasm in breeding, and attempt to introgress genetic factors contributing to greater environmental tolerances from these wild relatives into elite crop types. However, this approach can be difficult, as it relies on factors such as ease of hybridization and genetic distance between the source and target, crossover frequencies and distributions in the hybrid, and ability to select for desirable introgressions while minimizing linkage drag. In this review, we outline the possible effects that climate change may have on crop production, introduce the Brassica crop species and their wild relatives, and provide an index of useful traits that are known to be present in each of these species that may be exploitable through interspecific hybridization-based approaches. Subsequently, we outline how introgression breeding works, what factors affect the success of this approach, and how this approach can be optimized so as to increase the chance of recovering the desired introgression lines. Our review provides a working guide to the use of wild relatives and related crop germplasm to improve biotic and abiotic resistances in Brassica crop species.

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Section: Useful Traits Identified In Brassica Crops and Wild Alliesmentioning

confidence: 99%

Section: Useful Traits Identified In Brassica Crops and Wild Alliesmentioning

confidence: 99%

Using wild relatives and related species to build climate resilience in Brassica crops

et al. 2021

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“…In particular, Yagi-Uda structures have drawn attention due to their inherent resonance capabilities and directionality, properties that make them effective absorbers for selected wavelengths 36 , 37 . This has allowed for the extension of their application beyond traditional communication systems to fields, such as electromagnetic interference reduction and stealth technology.…”

Section: Introductionmentioning

confidence: 99%

Liquid crystal-enabled tunability of Yagi-Uda antenna resonant properties

Yakovkin,

Reshetnyak

2023

J. Optical Microsystems

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We demonstrate the application of liquid crystals to modulate the resonance properties of Yagi-Uda metamaterial absorbers. The absorbance and reflectance peak frequencies and amplitudes were found to be adjustable by reorienting the liquid crystal, irrespective of the polarization of the incident light. Notably, the lowest resonant frequencies were observed when the liquid crystal was in the homeotropic orientation, whereas a reorientation toward the y -axis showed a significant frequency increase, up to 1 GHz. Incorporating liquid crystals to the Yagi-Uda antenna arrays can also serve as a method for eliminating undesired modes, not associated with the antenna resonance. This can be achieved by taking advantage of the sensitivity differences of these modes to refractive index components. The results presented in this study highlight the potential of liquid crystals to deliver dynamic manipulation and real-time adaptability of Yagi-Uda antennas.

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“…However, for such applications, in general a microstrip antenna is used which has low bandwidth and low gain [3][4][5]. Recently, due to easy availability of additive manufacturing technology (AM) and threedimensional printing technology, three-dimensional (3-D) antennas have become a popular component among research communities [6][7][8]. The horn antenna reported in [9] has broadband and high gain, but the design is non-planar and bulky in size, and the design requires an external feeding antenna.…”

Section: Introductionmentioning

confidence: 99%

Novel Broadband High Gain Antenna Designed by Suspended Cylinder and Shorting Pin

Duttagupta¹

2018

PIER C

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Desire for a broadband, high gain, unidirectional and low cost antenna in the field of communications is everlasting. In this paper, a novel broadband high gain antenna is presented using a suspended cylinder and a ground connected cylinder geometry. The bandwidth of the proposed antenna is enhanced by shorting these two cylinders with a pin in the direction orthogonal to the plane of coaxial probe. This low profile antenna structure is simple and easy to fabricate. The cylinders, shorting pin and ground plane are fabricated by a copper sheet of thickness 0.4 mm. Shorting pin and SMA connector provide mechanical support to the suspended cylinder. Simulations are done to analyze the radiation performance of the antenna. Prototype of the antenna is fabricated, and the measured results show good agreement with the simulated ones to confirm the enhanced bandwidth offered by the proposed antenna. We achieve impedance bandwidth of 63% (2.6-5 GHz) with the peak broadside gain of 9.87 dB. The bandwidth of the proposed antenna can be tuned by changing the radius of the shorting pin. The designed antenna possesses broadband high gain with stable broadside unidirectional radiation pattern which is suitable for Base station antenna such as WiMax (Worldwide Interoperability for Microwave Access) and LTE (Long Term Evolution). The metallic antenna has high power handling capacity as compared to microstrip and dielectric antennas. Therefore, this antenna can also be used for high power transfer application.

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Study of THz-Plasmon hybridization of a loop Yagi-Uda absorber

Cited by 7 publications

References 46 publications

Using wild relatives and related species to build climate resilience in Brassica crops

Using wild relatives and related species to build climate resilience in Brassica crops

Liquid crystal-enabled tunability of Yagi-Uda antenna resonant properties

Novel Broadband High Gain Antenna Designed by Suspended Cylinder and Shorting Pin

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