Millimeter-Wave Multi-Beam Waveguide Lens Antenna

Basavarajappa, Vedaprabhu; Pellon, Alberto; Montesinos-Ortego, I.; Exposito, Beatriz Bedia; Cabria, L.; Basterrechea, J.

doi:10.1109/tap.2019.2916388

Cited by 25 publications

(3 citation statements)

References 16 publications

(16 reference statements)

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“…Conventional multibeam antennas are mainly classified into three types: reflector multibeam antennas [5], lens multibeam antennas [6][7][8] and phased array multibeam antennas [9][10][11][12][13]. Multibeam lens antennas and multibeam reflector antennas use quasi optical method to generate multiple beams.…”

Section: Introductionmentioning

confidence: 99%

Multibeam antennas with customized elevation angles based on near-field magnetic field coupling of metamaterials

Zhang¹,

Wang²,

Han³

et al. 2022

J. Phys. D: Appl. Phys.

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In this letter, we propose the design of multibeam antennas with customized elevation angles based on near-field magnetic field coupling of metamaterials. The antenna consists of a monopole feed and four identical metamaterial transmission-line (MTL) structures surrounding the feed. The MTL structure is composed of two pairs of broadside-coupled omega rings (BCORs) that are connected by two straight strip-lines. Under such a framework, magnetic fields within the near-field zone of the monopole feed can be coupled efficiently by the inner BCOR, converted to travelling waves along the double strip-lines, guided toward the outer end of the MTL structure, and radiated by the outer BCOR like a loop antenna. Due to travelling wave nature of the MTL structure, there is phase lag along the MTL structure and the radiation main lobes are tilted towards the outward direction. By arranging several MTL structures around the feed monopole, multi-beam directional radiation can be realized. More interestingly, by adjusting structural parameters and pitch angles of the MTL structures, elevation angle of the radiation main lobes can be customized. To validate the design, we simulated, fabricated and measured four prototypes with pitch angles 0°, 15°, 30° and 45°. Both the simulated and measured results verify the design and show that multiple-beam radiation with customized elevation angle can be obtained. This work provides an alternative method of designing multi-beam antennas and may find applications in communication, surveillance, etc.

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Section: Introductionmentioning

confidence: 99%

Multibeam antennas with customized elevation angles based on near-field magnetic field coupling of metamaterials

Zhang¹,

Wang²,

Han³

et al. 2022

J. Phys. D: Appl. Phys.

View full text Add to dashboard Cite

show abstract

“…With the rapid development of wireless communication technology, miniaturized multifunctional antennas have drawn tremendous attention. A single multifunctional antenna, such as a multi-band antenna [1], a multi-polarized antenna [2], or a multi-beam antenna [3], can achieve the functionalities of two or more antennas combined. Reconfigurable antennas, as a form of multifunctional antennas, have many advantages over traditional antennas, such as miniaturization and integration.…”

Section: Introductionmentioning

confidence: 99%

Wideband Pattern- and Polarization-Reconfigurable Antenna Based on Bistable Composite Cylindrical Shells

Zhang

Lin

et al. 2020

IEEE Access

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This paper presents a wideband pattern-and polarization-reconfigurable antenna based on bistable composite cylindrical shells. This antenna, which includes seven radiating metal strips, uses bistable anti-symmetric glass fiber-reinforced polymer (GFRP) composite cylindrical shells as the substrate to achieve reconfigurability without the need for redundant structures or semiconductor devices. This bistable GFRP substrate has two stable cylindrical configurations: extended structure and coiled-up structure. Therefore, by transforming the configuration, the radiation patterns of the proposed antenna are changed, and simultaneously, the polarization is switched between left-handed circular polarization (LHCP) and right-handed circular polarization (RHCP). A prototype of the proposed antenna is fabricated and measured. The measured results indicate that the antenna can operate in the frequency range from 2.3 to 3 GHz in the two configurations. The proposed antenna can be utilized as the payload of a satellite.INDEX TERMS Wideband, pattern-reconfigurable antenna, polarization-reconfigurable antenna, bistable cylindrical shells.

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“…12 Illustration depicting the way of refractive index retrieval Basavarajappa et al EURASIP Journal on Wireless Communications and Networking (2019) 2019:181energy towards the centre increasing the gain of the antenna. The simulation results of the antenna have been presented in[11].…”

mentioning

confidence: 99%

Quasi-optics-inspired low-profile endfire antenna element

Basavarajappa

Exposito

Cabria

et al. 2019

J Wireless Com Network

Self Cite

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In this paper, the design, operational principle and experimental validation of an endfire antenna element that is inspired by the energy-focusing characteristics of graded-index optical fibre are presented. The antenna operates with a bandwidth of 1.5 GHz centred around 14 GHz. It has a gain of around 5.5 dBi along the band of interest and a good pattern stability over the band. The antenna derives its unique nature from the arrangement of the arc-shaped parasitics, that couple onto the antenna´s driver dipole. An electromagnetic refractive index retrieval mechanism is used to guide the placement of the parasitics to enhance the gain. In addition to the design principle, a parametric study of the main parameters and their influence on the antenna behaviour is presented. The antenna is a potential candidate for use in multiuser massive MIMO antenna arrays for 5G communications where space is premium and in antenna array applications where a low-profile antenna element with a high gain is a necessity.

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Millimeter-Wave Multi-Beam Waveguide Lens Antenna

Cited by 25 publications

References 16 publications

Multibeam antennas with customized elevation angles based on near-field magnetic field coupling of metamaterials

Multibeam antennas with customized elevation angles based on near-field magnetic field coupling of metamaterials

Wideband Pattern- and Polarization-Reconfigurable Antenna Based on Bistable Composite Cylindrical Shells

Quasi-optics-inspired low-profile endfire antenna element

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