Leaky-wave antenna with high gain and wide beam-scanning angle range based on novel SIW-CRLH transmission line

Wang, Chuan'an; Hu, Bo

doi:10.1002/mmce.20926

Cited by 9 publications

(9 citation statements)

References 20 publications

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“…According to the theory of LWA, the radiation angle ϕ of LWA is determined by the equivalent phase constant β of the corresponding guided wave structure and the wave number in free space k 0 , as described by,

ϕ = \arcsin \frac{β}{k_{0}}

…”

Section: Nematic Lc Properties In Microwave Bandmentioning

confidence: 99%

“…Leaky wave antenna (LWA) is a typical traveling wave antenna, which features frequency scanning capability and strong directionality . To date, it has been widely utilized in conformal aircraft, high‐resolution radar, as well as the enclosed space of mobile terminals and other wireless communication devices . 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.…”

Section: Introductionmentioning

confidence: 99%

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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

show abstract

ϕ = \arcsin \frac{β}{k_{0}}

…”

Section: Nematic Lc Properties In Microwave Bandmentioning

confidence: 99%

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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“…And LWAs array based on SIW structure was proposed to obtain high efficiency [5,6]. Furthermore, to realize beam scanning from backward to forward, SIW LWAs were designed by periodically loading of transversal and longitudinal slots [7], interdigital slots [8,9]. However, it is challenging for the conventional SIW structure to be integrated with the active device.…”

Section: Introductionmentioning

confidence: 99%

A Novel Frequency Scanning Leaky-Wave Antenna Based on Corrugated Substrate Integrated Waveguide

Chen

Zhang

et al. 2018

International Journal of Antennas and Propagation

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In order to facilitate the integration of active devices, a leaky-wave antenna (LWA) based on corrugated substrate integrated waveguide (CSIW) structure is proposed. By introducing rectangular ring slots on the CSIW structure, the proposed LWA is capable of beam scanning from backward to forward. The rectangular ring slots do not only enable energy leaking but also provide series capacitance. In addition, the grounded vias and quarter-wave open-circuit stubs provide shunt inductance. Thus, the proposed CSIW exhibits left-handed characteristic which enables beam scanning through the broadside. To further facilitate the design and suppress open-stopband of beam scanning antenna based on CSIW structure, an equivalent circuit model is developed and the relationships between structure parameters and the equivalent circuit parameters are presented. Based on this design guide, a leaky wave antenna is designed with radiation angle ranging from −53° to 23°. This proposed novel CSIW LWA has great potential in tunable or reconfigurable antenna design due to its ease of integration with active devices.

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“…A LWA based on SIW CRLH transmission line is proposed in Ref. . The most important advantages of this LWA are high gain and wide beam scanning angle.…”

Section: Introductionmentioning

confidence: 99%

A dual band leaky wave antenna based on modified substrate integrated waveguide

Nazarzadeh

Neshati

2017

Int J RF Microw Comput Aided Eng

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In this article, a new leaky wave antenna (LWA) based on modified substrate integrated waveguide (SIW) is introduced. At first, the modified SIW structure is presented and it is shown that it supports propagation of quasi‐TEM with nearly uniform electric field distribution. Then, a new cell based on diagonal‐shaped slots embedded on top surface of the structure is introduced and its dispersion characteristics and its different radiation regions are determined. A LWA made of 15 unit cells is designed and a prototype of the antenna is fabricated. The proposed LWA is simulated using a software package and its radiation characteristics are also measured. It is shown that a good agreement is obtained between simulated and measured results and two frequency bands are obtained. In the frequency range of 7 GHz to 8.25 GHz, it radiates in forward region with maximum gain of 11.3 dB and scan angles from 54° to end‐fire. In addition, it radiates in backward region from −70° to broadside from 14 GHz up to 20 GHz with maximum gain of 16.47 dB. High gain, compactness, and wide scan angles are the advantages of the proposed LWA.

show abstract

Leaky-wave antenna with high gain and wide beam-scanning angle range based on novel SIW-CRLH transmission line

Cited by 9 publications

References 20 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

A Novel Frequency Scanning Leaky-Wave Antenna Based on Corrugated Substrate Integrated Waveguide

A dual band leaky wave antenna based on modified substrate integrated waveguide

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