Nonreciprocal and Magnetically Scanned Leaky-Wave Antenna Using Coupled CRLH Lines

Apaydin, Nil; Sertel, Kubilay; Volakis, John L.

doi:10.1109/tap.2014.2314308

Cited by 35 publications

(22 citation statements)

References 14 publications

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“…Traditional LWA is only amenable to achieve continuous beam scanning in a broad frequency band; however, electronically controlled LWA loaded with tunable devices or materials such as ferrites, diode, and Micro‐Electro‐Mechanical System, (MEMS), is capable of beam steering at a given frequency. Although ferrites hold high permittivity and permeability, as well as fast tuning speed, high production cost and high magnetic field, which have significant effect on the microwave devices . Varactor featuring low‐cost and wide‐tunable range is widely used in microwave components.…”

Section: Introductionmentioning

confidence: 99%

Electronically controlled beam steering leaky wave antenna in nematic liquid crystal technology

Wang

Meng

et al. 2020

Int J RF Microw Comput Aided Eng

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A novel nematic liquid crystal (LC) technology-based electronically controlled leaky wave antenna (LWA) with microstrip-waveguide conversion working mechanism and wide beam steering range is presented in this article. The LWA is a combination of an inverted microstrip structure and rectangular waveguide. According to the characteristics of LC materials in microwave band, a broadband microstrip-waveguide conversion device is proposed. The gradient slot leaky wave structure is combined with the microstrip-waveguide conversion device to form an electronically controlled LWA with continuous tunable beam. Simulation and experiment results show that the LWA proposed in this article has a 32 beam scanning range at 12 GHz and good impedance matching and stable gain, suggesting the great potential of nematic LC materials for extensive applications in microwave band in the future. K E Y W O R D S beam steering, leaky wave antenna (LWA), liquid crystal (LC), microstrip-waveguide conversion, nematic

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Section: Introductionmentioning

confidence: 99%

Electronically controlled beam steering leaky wave antenna in nematic liquid crystal technology

Wang

Meng

et al. 2020

Int J RF Microw Comput Aided Eng

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“…Since the first experimental demonstration of a left-handed (LH) structure with simultaneously negative effective permittivity and permeability [1][2][3][4][5] in the microwave frequencies, [6] some authors [7][8][9][10] adopted an engineering approach and developed the generalized transmission line (TL) theory to exhibit unprecedented features [11][12][13][14][15] in terms of performances or functionalities. These efforts resulted in the elaboration of the powerful CRLH concept, in which the right-handedness and left-handedness accompanying the positive/negative refraction index achieved in the higher and microwave frequency bands, respectively, and the CRLH-TL led to a suite of novel guided-wave, [16] radiated-wave, [17] and refracted-wave devices and structures.…”

Section: Introductionmentioning

confidence: 99%

Monochromatic Composite Right/Left Handedness in the Quantized Composite Right/Left Handed Transmission Line

Zhao

Lin

2019

Annalen der Physik

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Macro composite right/left handedness (CRLH) signifies positive/negative refraction index in different frequency bands in the composite right/left handed transmission line (CRLH‐TL). In this paper, the refraction index of a quantized CRLH‐TL in the thermal squeezed state is visited. Performing explicit calculations on the squeezed parameters and electronic components' parameters, a novel regime for implementing CRLH with a single operating frequency via the squeezed parameters and electronic components' parameters is found. The definitely different monochromatic CRLH enriches the initial definition of CRLH, and may propose a novel direction to implement CRLH in metamaterials.

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“…In the the antenna application, the fractional bandwidth can be enhanced from 0.31% to 12.5% in a resonant antenna with an asymmetric coplanar waveguide based on the CRLH-TL [18]. And a new class of miniaturized nonreciprocal leaky-wave antenna is proposed for miniaturization, nonreciprocal properties and wide-angle scanning at the same time [19]. With four unit cells of CRLH-TL a wide-band loop antenna is proposed in a compact size [20].…”

Section: Introductionmentioning

confidence: 99%

The thermal effect on the left-handedness of the mesoscopic composite right-Left handed transmission line

Wei

Zhao

Guo

2017

Superlattices and Microstructures

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Starting from the quantum fluctuation of current in the mesoscopic composite rightleft handed transmission line (CRLH-TL) in the thermal Fock state, we investigate the left-handedness dependent of the frequencies, intensity and quantum fluctuations of the current field in the CRLH-TL under different thermal environment. The results show that the intensity and quantum fluctuations of current field in lower frequency bands affect the left-handedness distinctly under different thermal environment. The thermal effect on the left-handedness in the mesoscopic CRLH-TL deserves further experimental investigation in its miniaturization application.

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Nonreciprocal and Magnetically Scanned Leaky-Wave Antenna Using Coupled CRLH Lines

Cited by 35 publications

References 14 publications

Electronically controlled beam steering leaky wave antenna in nematic liquid crystal technology

Electronically controlled beam steering leaky wave antenna in nematic liquid crystal technology

Monochromatic Composite Right/Left Handedness in the Quantized Composite Right/Left Handed Transmission Line

The thermal effect on the left-handedness of the mesoscopic composite right-Left handed transmission line

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