Ultra‐wideband linearly polarised planar bowtie array antenna with feeding network using dielectric‐based inverted microstrip gap waveguide

Zhang, Tianling; Lei, Chen; Moghaddam, Sadegh Mansouri; Zaman, Ashraf Uz; Yang, Jian

doi:10.1049/iet-map.2019.0810

Cited by 17 publications

(4 citation statements)

References 31 publications

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“…A significant number of SIGW microstrip antennas have been constructed employing various radiating components such as magneto-electric (ME) dipoles [50], [51], spiral antennas [52], [53] and metasurface antennas [54]. Furthermore, employing the tightly coupled array concept, numerous GW-based array antennas with UWB performance in either linear or circular polarisation have been realized [55]- [57]. However, even if the array antenna is developed by combining GW technology with microstrip antennas results in increased loss owing to the presence of dielectric substrates, it remains an intriguing and attractive option when compared to the ordinary microstrip array.…”

Section: B Fixed Beam Microstrip Antennamentioning

confidence: 99%

An Overview of Recent Development of the Gap-Waveguide Technology for mmWave and sub-THz Applications

Yong¹,

Bagheri²,

Ven³

et al. 2023

Preprint

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<p>Interest in the mmWave and sub-THz bands for next-generation communication and radar systems is increasingly growing due to the available electromagnetic spectrum. This has led to an urgent need to develop low-loss and low-fabrication-cost technologies that perform well at these frequencies. The Gap Waveguide (GW) technology is an emerging and viable contender for the development of radio frequency passive components and antenna systems. The GW technology is based on the parallel-plate waveguide principle. According to Maxwell's equations, ideally, no wave propagates within a structure if the top plate consists of a perfect electric conductor (PEC) while the bottom plate is a perfect magnetic conductor (PMC), and the distance between the plates is less than a quarter wavelength. This PMC structure creates high surface impedance characteristics which provide cutoff to all propagating modes within the airgap. In practice, these magnetic conductors can be created artificially using an Electromagnetic Band Gap (EBG) structure. Based on this simple principle, considerable research and development of novel components with high performance has seen the light in the past decade. The purpose of this paper is to present an overview of current advancements in the design and technical implementations of GW-based antenna systems and components. Practical applications and the industry interest in the developments of the GW technology for mmWave and sub-THz applications have also been scrutinized.</p>

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Section: B Fixed Beam Microstrip Antennamentioning

confidence: 99%

An Overview of Recent Development of the Gap-Waveguide Technology for mmWave and sub-THz Applications

Yong¹,

Bagheri²,

Ven³

et al. 2023

Preprint

View full text Add to dashboard Cite

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“…1. Periodic structures are a vital aspect of transmission line and waveguide systems, characterized by the presence of reactive elements at regular intervals along the structure [6,28]. These elements can manifest in various forms, depending on the specific type of transmission line employed.…”

Section: Unit Cell Designmentioning

confidence: 99%

“…The proposed bandpass filter is composed of a specific geometric configuration and schematic diagram [6], as illustrated in Fig. 4.…”

Section: Design Of Multi-band (X-ku Band) Rgw Structurementioning

confidence: 99%

Highly-selective Ridge Gap Waveguide Based Filters for Multi-band Satellite Applications

Chhasatia¹,

Chaudhari²,

Patel³

2023

PIER M

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In this paper, a pioneering and innovative approach for multiple-band ridge gap waveguide (MB-RGW) based narrowband bandpass filter for satellite applications is presented. The MB-RGW represents a significant and emerging technological advancement within the domain of microwave and millimeter-wave engineering. It comprises a periodic structure that enables the propagation of electromagnetic waves along its axis. We have provided a detailed analysis of the MB-RGW, which includes its design, simulation, and experimental results. A prototype filter, designed according to specifications, was successfully produced with a fabricated circuit area measuring 42.25 mm×76.25 mm× 8.8 mm. We demonstrate that the MB-RGW can achieve multiple bands with a single structure, making it a versatile and efficient device for a wide range of applications. We also present a detailed analysis of the factors that affect the performance of the MB-RGW, including the geometry of the ridge and the spacing between ridges. Our experimental results show that the MB-RGW can achieve high levels of attenuation and isolation, making it a promising candidate for the use in microwave and millimeterwave circuits and systems. The experimental results show S 11 smaller than −20 dB over relative bandwidths, and S 21 has a maximum of −0.07 dB. The proposed filter demonstrates four resonances at frequencies of 10.6 GHz, 12.6 GHz, 14.7 GHz, and 17.1 GHz, catering to mobile and fixed radio locations as well as satellite applications. It exhibits a fractional bandwidth of 0.44% at 3 dB in the X-Band and approximately 0.57% to 0.61% at 3 dB bandwidth in the Ku-band. The filter offers a compact, cost-effective, and easily implementable solution for satellite communication systems, including space operations, earth exploration, satellite TV broadcasting, and fixed satellite services (FSS). Overall, this paper provides a comprehensive overview of the MB-RGW and its potential for the use in a range of applications.

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“…There are many examples of designs of antennas and circuits made in gap waveguide technology in the literature, but not that many in the case of the inverted microstrip version. Some examples can be found in [5][6][7][8][9][10][11]; also transitions to standard waveguides and transmission lines have been developped [12][13][14][15][16], the study of the optimal numeric port [17]; up to some of the various components that make up a RF front-end like antenna feeds [18][19][20][21][22][23][24][25][26][27][28][29][30][31][32]; beamforming Butler matrix [33,34] or filters [5,[35][36][37][38][39]. Few studies on diplexers with this technology have been published apart from this one using the groove version [40].…”

Section: Introductionmentioning

confidence: 99%

Ka-Band Diplexer for 5G mmWave Applications in Inverted Microstrip Gap Waveguide Technology

2020

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A new cost-efficient, low-loss Ka-band diplexer designed in inverted microstrip gap waveguide technology is presented in this paper. Gap waveguide allows to propagate quasi-TEM modes in the air between two metal plates without the need for contact between them by using periodic metasurfaces. The diplexer is realized by using a bed of nails as AMC (Artificial Magnetic Conductor), first modeled with a PMC (Perfect Magnetic Conductor) surface for design simplification, and two fifth order end-coupled passband filters (BPFs) along with a power divider. The experimental verification confirms that the two channels centered at 24 GHz and 28 GHz with 1 GHz of bandwidth show measured insertion losses of 1.5 dB and 2 dB and 60 dB of isolation between them. A slight shift in frequency is observed in the measurements that can be easily explained by the variation in the permittivity of the substrate.

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Ultra‐wideband linearly polarised planar bowtie array antenna with feeding network using dielectric‐based inverted microstrip gap waveguide

Cited by 17 publications

References 31 publications

An Overview of Recent Development of the Gap-Waveguide Technology for mmWave and sub-THz Applications

An Overview of Recent Development of the Gap-Waveguide Technology for mmWave and sub-THz Applications

Highly-selective Ridge Gap Waveguide Based Filters for Multi-band Satellite Applications

Ka-Band Diplexer for 5G mmWave Applications in Inverted Microstrip Gap Waveguide Technology

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