Broadside-Coupled Microstrip Lines as Low Loss Metamaterial for Microwave Circuit Design

Gong, Shaofang; Xu, Xin; Karlsson, Magnus

doi:10.1155/2019/9249352

Cited by 4 publications

(5 citation statements)

References 15 publications

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“…In [ 26 ], a completely customized protocol stack, WirelessHP, is proposed for high performance critical industrial control applications, which is able to reach multi-Gbps data rate, sub-microsecond scheduling unit and very high reliability. The research in [ 27 , 28 ] show low-loss metamaterial for ultra-high-speed data transmission at low cost. These studies have the potential to disrupt the landscape of current industrial communication technologies, thus may benefit future communications in plant factories, though delay time from software layer running on edge computing units and in the cloud needs further investigation.…”

Section: Preliminary Proofs-of-conceptmentioning

confidence: 99%

Plant Factory: A New Playground of Industrial Communication and Computing

Liu

Mousavi²,

Pang

et al. 2021

Sensors

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Plant Factory is a newly emerging industry aiming at transforming crop production to an unprecedented model by leveraging industrial automation and informatics. However, today’s plant factory and vertical farming industry are still in a primitive phase, and existing industrial cyber-physical systems are not optimal for a plant factory due to diverse application requirements on communication, computing and artificial intelligence. In this paper, we review use cases and requirements for future plant factories, and then dedicate an architecture that incorporates the communication and computing domains to plant factories with a preliminary proof-of-concept, which has been validated by both academic and industrial practices. We also call for a holistic co-design methodology that crosses the boundaries of communication, computing and artificial intelligence disciplines to guarantee the completeness of solution design and to speed up engineering implementation of plant factories and other industries sharing the same demands.

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Section: Preliminary Proofs-of-conceptmentioning

confidence: 99%

Plant Factory: A New Playground of Industrial Communication and Computing

Liu

Mousavi²,

Pang

et al. 2021

Sensors

Self Cite

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“…Filtering power divider (FPD) [1][2][3][4][5][6][7][8][9][10][11][12] shows obvious advantages in frequency selectivity, compared with the traditional power divider. With the development of wideband communication multi-input and multioutput (MIMO) technology, the FPD with large bandwidth is highly required in the system.…”

Section: Introductionmentioning

confidence: 99%

“…Until now, several filtering circuits with broadside-coupled lines are reported. [10][11][12] In the reported results, highperformance dielectric materials, including Rogers, 10 LTCC 11 , and metamaterial, 12 are usually adopted. The corresponding fabrication processes are very complex, which inevitably increase the cost and degrade the property.…”

Section: Introductionmentioning

confidence: 99%

“…Broadside‐coupled lines can be used to realize tight coupling with large coupling coefficient, which is always considered as simple and effective solution for the wideband bandpass filter. Until now, several filtering circuits with broadside‐coupled lines are reported 10–12 . In the reported results, high‐performance dielectric materials, including Rogers, 10 LTCC 11 , and metamaterial, 12 are usually adopted.…”

Section: Introductionmentioning

confidence: 99%

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Novel 6‐GHz/80.8% fractional bandwidth filtering power divider with ultra‐large coupling coefficient using air‐dielectric broadside‐coupled lines

Wang,

Jiang,

2024

Micro & Optical Tech Letters

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In the letter, a wideband filtering power divider (FPD) with ultra‐large coupling coefficient using air‐dielectric broadside‐coupled lines is proposed. The broadside‐coupled line and single transmission line are alternately connected to construct three resonators, which can be used for large bandwidth and high selectivity filtering. An improved substrate‐integrated suspended line (SISL) structure with two inner layers is developed. In the structure, the broadside coupling occurs by the air. The overall structure is implemented based on the low‐cost FR4 dielectric material. The designed FPD is simulated and fabricated. The results demonstrate its excellent performance, with center frequency of 6 GHz, a fractional bandwidth (FBW) of 80.8%, a maximum coupling coefficient of 0.84, an insertion loss of less than 0.29 dB, and an out‐of‐band rejection of more than 52 dB.

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“…Leakage of metal pipes can cause economic loss [4][5][6][7][8]. The defect inspection methods of metal pipes mainly include infrared thermal imaging inspection, ultrasonic inspection, eddy current inspection, optical fiber sensing inspection, and microwaves, etc [9][10][11][12][13][14][15]. The ultrasonic method is used for internal defect inspection and wall thickness measurement of metal pipes.…”

Section: Introductionmentioning

confidence: 99%

Research of Crack Defect Detection in Metal Pipes Based on Microwave Antenna Array

Qiu

Tian

Yuan

2022

Wireless Communications and Mobile Computing

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This study evaluates the feasibility of using antenna array to detect crack defects in metal pipes. Antenna arrays are set at the port of a metal pipe in radial direction, and the microwave signal can be effectively coupled into the metal pipe. It can produce orbital angular momentum (OAM) waves. The cracks in the pipe will change the microwave transmission characteristics, and they can be inspected by time domain reflectometry (TDR) of vector network analyzer (VNA). By studying the transmission characteristics of current on the inner surface of the metal pipe, the feasibility of linearly polarized TE11 mode microwaves for crack inspection was preliminarily verified. Three galvanized metal pipes with an inner diameter of 8 cm and a total length of about 270 cm were used in the experiment. Axial slits and circumferential slits were used to simulate the crack, respectively. The slits penetrated the pipe wall with a breach of approximately 10 cm × 0.7 cm . The experimental results demonstrated that the radial direction antenna array can detect both the axial slit and circumferential slit through TDR and standing wave ratio (SWR) at the port, especially effective for the axial slit. It provides a new inspection method for metal pipe defect evaluation.

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Broadside-Coupled Microstrip Lines as Low Loss Metamaterial for Microwave Circuit Design

Cited by 4 publications

References 15 publications

Plant Factory: A New Playground of Industrial Communication and Computing

Plant Factory: A New Playground of Industrial Communication and Computing

Novel 6‐GHz/80.8% fractional bandwidth filtering power divider with ultra‐large coupling coefficient using air‐dielectric broadside‐coupled lines

Research of Crack Defect Detection in Metal Pipes Based on Microwave Antenna Array

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