Study of Various Beamformers and Smart Antenna Adaptive Algorithms for Mobile Communication

Britto, Elizabeth Caroline; Danasegaran, Sathish Kumar; Xavier, Susan Christina; Sridevi, A.; Batcha, Abdul Rahim Sadiq

doi:10.1007/978-3-030-76636-8_10

Cited by 9 publications

(2 citation statements)

References 39 publications

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“…Beamforming is operated by varying the amplitude and the phase of the signal fed to each radiating element of the phased array [11]. While phase shifters are crucial to control the orientation of the radiation pattern, attenuators are crucial to the control of its shape [12].…”

Section: Introductionmentioning

confidence: 99%

Discussion and Demonstration of RF-MEMS Attenuators Design Concepts and Modules for Advanced Beamforming in the Beyond-5G and 6G Scenario—Part 2

Tagliapietra,

Giacomozzi,

Michelini

et al. 2024

Preprint

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In this paper, different concepts of reconfigurable RF-MEMS attenuators for beamforming applications are proposed and critically assessed. Capitalizing on the previous part of this work, the 1-bit attenuation modules featuring series and shunt resistors and low-voltage membranes (7-9 V) are employed to develop a 3-bit attenuator for fine-tuning attenuations (&lt; -10 dB) in the 24.25-27.5 GHz range. More substantial attenuation levels are investigated by means of fabricated samples of coplanar waveguide (CPW) sections equipped with Pi-shaped resistors aiming at attenuations of -15, -30, and -45 dB. The remarkable electrical features of such configurations, showing flat attenuation curves and limited return losses, and the investigation of a switched-line attenuator design based on them led to the final proposed concept of a low-voltage 24-state attenuator. Such simulated device combines the Pi-shaped resistors for substantial attenuations with the 3-bit design for fine-tuning operations, showing a maximum attenuation level of nearly -50 dB while maintaining steadily flat attenuation levels and limited return losses (< -11 dB) along the frequency band of interest.

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Section: Introductionmentioning

confidence: 99%

Discussion and Demonstration of RF-MEMS Attenuators Design Concepts and Modules for Advanced Beamforming in the Beyond-5G and 6G Scenario—Part 2

Tagliapietra,

Giacomozzi,

Michelini

et al. 2024

Preprint

View full text Add to dashboard Cite

show abstract

“…Because of its non-ionizing characteristics, the THz band is helpful in THz imaging, which includes skin, oral, breast, gastric, and colorectal cancers. MPA antenna plays a significant role in realizing all these applications, and it has more advantages [7][8][9][10][11] than other antennas. The MPA performances and limitations are enhanced by various methods like defected ground, metamaterials, 12,13 patched array, and photonic crystal.…”

Section: Introductionmentioning

confidence: 99%

Investigation of the antenna characteristics with the impact of hexagonal metamaterial

Ponnupillai

Arunakiri

Danasegaran³

et al. 2023

Int J Communication

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Antenna miniaturization is a typical trend in contemporary wireless systems, notably for current wireless technology, to meet multiband needs while preserving high transmission qualities. The terahertz (THz) regime is helpful in advanced applications and significantly impacts wireless technology. This paper proposes a double-layered hexagonal split ring resonator (HSRR) based on a microstrip patch antenna (MPA) and analyzes the simulated characteristics. The HSRR width is varied for different thickness "w" values and compares the analysis of with and without HSRR in the antenna. Due to the impact of metamaterials, the optimized antenna produces À44.02-dB return loss, 1.012 voltage standing wave ratio (VSWR), 6.47-dBi gain, and 4.78-dB directivity at 1.8-THz frequency. This proposed antenna is suitable for THz applications, which include high-speed data rate in wireless communication, bio-medical field, and THz spectrometer.

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Analysis of Wave Propagation in Hybrid Metamaterial Structure for Terahertz Applications

Lalithakumari,

Danasegaran,

Rajalakshmi

et al. 2023

Braz J Phys

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Study of Various Beamformers and Smart Antenna Adaptive Algorithms for Mobile Communication

Cited by 9 publications

References 39 publications

Discussion and Demonstration of RF-MEMS Attenuators Design Concepts and Modules for Advanced Beamforming in the Beyond-5G and 6G Scenario—Part 2

Discussion and Demonstration of RF-MEMS Attenuators Design Concepts and Modules for Advanced Beamforming in the Beyond-5G and 6G Scenario—Part 2

Investigation of the antenna characteristics with the impact of hexagonal metamaterial

Analysis of Wave Propagation in Hybrid Metamaterial Structure for Terahertz Applications

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