Novel Composite Right/Left-Handed Leaky-Wave Antennas Based on the Folded Substrate-Integrated-Waveguide Structures

Yang, Tao; Chi, Pei‐Ling; Xu, Ruimin

doi:10.2528/pierc12040215

Cited by 12 publications

(5 citation statements)

References 23 publications

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“…Various LWA designs based on metamaterial structures have been considered in the past. Such designs include (1) an LWA with a composite right/left-hand (CRLH)-folded substrate-integrated waveguide (SIW) structure that is shown to provide beam scanning from of −58 • to 65 • with a gain of 1 dBi [10]; (2) an interdigital-shaped slotted-SIW-based LWA that is reported to achieve a scanning angle of −60 • to 70 • with gain of around 8 dBi [11]; (3) a CRLH LWA based on a rectangular waveguide structure that has been demonstrated for a continuous main beam scanning range from −70 • to 70 • with gain of 8.64 dBi [12]; and (4) a planar slotted SIW LWA that provides a scanning range of −66 • to 78 • with consistent gain [13].…”

Section: Introductionmentioning

confidence: 99%

High-Isolation Leaky-Wave Array Antenna Based on CRLH-Metamaterial Implemented on SIW with ±30o Frequency Beam-Scanning Capability at Millimetre-Waves

et al. 2019

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The paper presents a feasibility study on the design of a new metamaterial leaky-wave antenna (MTM-LWA) used in the construction of a 1 × 2 array which is implemented using substrate-integrated waveguide (SIW) technology for millimetre-wave beamforming applications. The proposed 1 × 2 array antenna consists of two LWAs with metamaterial unit-cells etched on the top surface of the SIW. The metamaterial unit-cell, which is an E-shaped transverse slot, causes leakage loss and interrupts current flow over SIW to enhance the array’s performance. The dimensions of the LWA are 40 × 10 × 0.75 mm3. Mutual-coupling between the array elements is suppressed by incorporating a metamaterial shield (MTM-shield) between the two antennas in the array. The LWA operates over a frequency range of 55–65 GHz, which is corresponding to 16.66% fractional bandwidth. The array is shown to exhibit beam-scanning of ±30° over its operating frequency range. Radiation gain in the backward (−30°), broadside (0°), and forward (+30°) directions are 8.5 dBi, 10.1 dBi, and 9.5 dBi, respectively. The decoupling slab is shown to have minimal effect on the array’s performance in terms of impedance bandwidth and radiation specifications. The MTM-shield is shown to suppress the mutual coupling by ~25 dB and to improve the radiation gain and efficiency by ~1 dBi and ~13% on average, respectively.

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Section: Introductionmentioning

confidence: 99%

High-Isolation Leaky-Wave Array Antenna Based on CRLH-Metamaterial Implemented on SIW with ±30o Frequency Beam-Scanning Capability at Millimetre-Waves

et al. 2019

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“…Composite right/left-handed (CRLH) transmission line (TL) structures have been studied extensively over the past decades due to their unusual properties such as supporting backward and forward wave propagations simultaneously and infinite wavelength propagation [1]. Numerous CRLH TL structures have been proposed so far, and they can be generally classified into two categories: planar structures [2][3][4][5][6][7][8][9][10] and three-dimensional (3D) waveguide structures [11][12][13][14]. Planar CRLH TLs have the advantages of low profile, low weight, low cost and easy fabrication, etc.…”

Section: Introductionmentioning

confidence: 99%

Electromagnetic Analysis on Propagation Characteristics of CRLH Waveguide Loaded With Double Ridge Corrugations

Yang¹,

Zhao²,

Zhang³

2017

PIER C

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The propagation characteristics of a composite right/left-handed (CRLH) waveguide loaded with air-filled double ridge corrugations (DRCs) is studied intensively in this paper. It is analyzed from the perspective of electromagnetic (EM) fields other than equivalent circuit method used by many other CRLH structures. First, the EM fields inside the CRLH waveguide are derived theoretically based on the EM fields in the rectangular waveguide and the DRC, as well as the boundary conditions on the interface, respectively. Then the propagation characteristics of the CRLH waveguide including the dispersion relation, surface current and transmitted power are determined according to the EM fields. The properties of the surface current are focused on for analyzing the application possibility of this CRLH waveguide to the leaky-wave antennas (LWAs). The transmitted power of the CRLH waveguide is calculated to demonstrate the high power capacitance of this CRLH waveguide. All the theoretical results are verified through full-wave simulations.

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“…A left-handed transmission line can be created by stacking unit cells together, such as a T-shaped electrical circuit made of series capacitors, shunted inductors, and transversal/longitudinal slots. The parasitic influences of the capacitors and the inductor culminate in a combination behavior that gives rise to the so-called artificial composite right/left-handed transmission lines (CRLH) [ 71 , 72 ], making it impossible to implement a fully left-handed transmission line in reality. Backward waves can travel on a pure left-handed transmission line (LHTL).…”

Section: Antenna Configurationmentioning

confidence: 99%

A Miniaturized Full-Ground Dual-Band MIMO Spiral Button Wearable Antenna for 5G and Sub-6 GHz Communications

Saeidi

Al-Gburi

Karamzadeh

2023

Sensors

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A detachable miniaturized three-element spirals radiator button antenna integrated with a compact leaky-wave wearable antenna forming a dual-band three-port antenna is proposed. The leaky-wave antenna is fabricated on a denim (εr = 1.6, tan δ = 0.006) textile substrate with dimensions of 0.37 λ0 × 0.25 λ0 × 0.01 λ0 mm3 and a detachable rigid button of 20 mm diameter (on a PTFE substrate εr = 2.01, tan δ = 0.001). It augments users’ comfort, making it one of the smallest to date in the literature. The designed antenna, with 3.25 to 3.65 GHz and 5.4 to 5.85 GHz operational bands, covers the wireless local area network (WLAN) frequency (5.1–5.5 GHz), the fifth-generation (5G) communication band. Low mutual coupling between the ports and the button antenna elements ensures high diversity performance. The performance of the specific absorption rate (SAR) and the envelope correlation coefficient (ECC) are also examined. The simulation and measurement findings agree well. Low SAR, <−0.05 of LCC, more than 9.5 dBi diversity gain, dual polarization, and strong isolation between every two ports all point to the proposed antenna being an ideal option for use as a MIMO antenna for communications.

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Novel Composite Right/Left-Handed Leaky-Wave Antennas Based on the Folded Substrate-Integrated-Waveguide Structures

Cited by 12 publications

References 23 publications

High-Isolation Leaky-Wave Array Antenna Based on CRLH-Metamaterial Implemented on SIW with ±30o Frequency Beam-Scanning Capability at Millimetre-Waves

High-Isolation Leaky-Wave Array Antenna Based on CRLH-Metamaterial Implemented on SIW with ±30o Frequency Beam-Scanning Capability at Millimetre-Waves

Electromagnetic Analysis on Propagation Characteristics of CRLH Waveguide Loaded With Double Ridge Corrugations

A Miniaturized Full-Ground Dual-Band MIMO Spiral Button Wearable Antenna for 5G and Sub-6 GHz Communications

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