A Cylindrical Coaxial-fed Resonant Cavity Antenna with Off-axis Beaming for 5G Applications

Goudarzi, Azita; Honari, Mohammad Mahdi; Gharaati, Alireza; Mirzavand, Rashid

doi:10.23919/eucap51087.2021.9411070

Cited by 5 publications

(4 citation statements)

References 19 publications

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“…The previous systems are not found to meet all the challenging requirements specified in this paper. In [14], [17], [18], θ 2 > 60 • is not met, although N metaplate = 1 is met. In [15], [16] and [19]- [21], the number of metaplates is N metaplate ≥ 2, which is against the main requirement of N metaplate = 1, and the aperture efficiency is low, i.e., it does not reach η aperture > 40%, despite of N metaplate ≥ 2.…”

Section: Introductionmentioning

confidence: 97%

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Realization of Deep Tilt Angle, High Aperture Efficiency, and Low Sidelobe Using a Single Metaplate and a Patch Antenna

2022

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A beam-forming system for a patch antenna is proposed to realize a deeply tilted beam with high-gain, high aperture efficiency, and low sidelobe level. The proposed system uses only one novel metaplate, where the total system height is less than one wavelength. Firstly, a T-shaped metatwin is created as an element for the metaplate. It is revealed that the metatwin can provide a phase shift of more than 450 • with change in the metatwin arm length. Based on this, secondly, a simulation is performed where a normally incident plane wave is refracted at a deep angle of 65 • using a single metaplate. Thirdly, the incident plane wave is changed to a quasi-spherical wave using a small patch antenna. It is found that a 65 • tilted beam is formed by virtue of a newly designed single metaplate. It is also found that a gain of 18.1 dBi is realized with an aperture efficiency of 49% and a maximum side lobe level of −14.6 dB. Fourthly, all simulated results, including the frequency response of the gain and S11, are validated using measured results.INDEX TERMS Beam forming, deep tilt angle, metaplate, patch antenna.

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Section: Introductionmentioning

confidence: 97%

“…However, the research in [11]- [17] has provided a solution for this antenna tilting issue, where a feed antenna is with N metaplate dielectric plates on which parasitic elements are printed. Such a dielectric plate is called a metaplate or metasurface.…”

Section: Introductionmentioning

confidence: 99%

Realization of Deep Tilt Angle, High Aperture Efficiency, and Low Sidelobe Using a Single Metaplate and a Patch Antenna

2022

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“…This displays primary beam scanning between 80 and 120. Beam-scanning techniques other than LWAs, such as SIW edge-radiation, near-field transformation, and end-fire antennas, may be employed [40][41][42][43][44][45][46][47][48][49][50].…”

Section: Introductionmentioning

confidence: 99%

SIW Leaky Wave Antenna for THz Applications

Arya

Garg

Al-Khafaji³

2023

Electronics

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This paper proposes a new design of leaky wave antenna (LWA) based on substrate integrated waveguide (SIW) technology for THz applications. The suggested LWA structure has a combination of longitudinal and transverse slots and makes a 10-element linear array of radiating elements. To address the problem of open-stop-band (OSB), four additional smaller slots were etched on the corners of longitudinal and transversal slots. At the broadside, this LWA provided a gain of 12.33 dBi, and a continuous wide beam scanning range from +78° to −6° via the broadside while exhibiting efficient radiation performance over the operating frequency bands of 105 GHz to 109 GHz with a peak gain of 16.02 dBi.

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“…It exhibits the main beam scanning from 80 • to 120 • . Apart from LWAs, other methods, such as near-field transformation, SIW edge-radiation and end-fire antennas can potentially been used for beam-scanning purposes [33][34][35][36][37].…”

Section: Introductionmentioning

confidence: 99%

A Wide-Angle Scanning Sub-Terahertz Leaky-Wave Antenna Based on a Multilayer Dielectric Image Waveguide

et al. 2021

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This paper presents a new layered dielectric leaky-wave antenna (LWA) for the sub-terahertz (THz) frequency range capable of efficient operation at the broadside with a wide beam scanning angle and stable gain. It consists of a conductor-backed alumina dielectric image line (DIL) with two different dielectric layers mounted on top of each other for performance improvement. The upper layer is a high permittivity RO6010 substrate to enhance the directivity as a superstrate and the lower layer is a low-permittivity RT/duroid 5880 substrate stacked on the alumina DIL to prevent the probable excitation of higher-order modes in the DIL channel. A 15-element linear array of radiating overlapped discs is used to mitigate the open stop-band (OSB) problem, fed by the mentioned waveguide, was designed and simulated at frequencies around 170 GHz. The dominant mode of the layered dielectric waveguide is perturbed by the infinite space harmonics generated by two sets of overlapped discs periodically sandwiched between the layers. It exhibited a relatively wide impedance bandwidth of 28.19% (157.5–206 GHz). Its radiation mechanism has been widely studied through simulations. The results revealed that the antenna provides a wide scanning capability through the broadside from −23° to 38°, covering the frequency range between 157.5 GHz and 201.5 GHz. For an array with 15 radiating elements, the simulated peak gain in the band is 15 dBi and the broadside gain is 13.6 dBi at 172 GHz.

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A Cylindrical Coaxial-fed Resonant Cavity Antenna with Off-axis Beaming for 5G Applications

Cited by 5 publications

References 19 publications

Realization of Deep Tilt Angle, High Aperture Efficiency, and Low Sidelobe Using a Single Metaplate and a Patch Antenna

Realization of Deep Tilt Angle, High Aperture Efficiency, and Low Sidelobe Using a Single Metaplate and a Patch Antenna

SIW Leaky Wave Antenna for THz Applications

A Wide-Angle Scanning Sub-Terahertz Leaky-Wave Antenna Based on a Multilayer Dielectric Image Waveguide

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