Reconfigurable Antennas for Advanced Wireless Communications: A Review

Karthika, K.; Kavitha, K.

doi:10.1007/s11277-021-08555-4

Cited by 34 publications

(9 citation statements)

References 152 publications

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“…The electrical properties of pure water are a function of frequency and temperature. At higher frequencies, the loss of signal increases linearly with frequency hence water is not a good dielectric for the upper band of microwave frequencies [19]. The large plexiglass object serves as a substrate whereas the smaller plexiglass on the top serves as supporting water patch material.…”

Section: Problem Statement and Proposed Solutionmentioning

confidence: 99%

Design and Validation of Water Based Dense Dielectric Patch Antenna (DDPA) for Microwave Communication around Frequency of 1GHz

Mukhtar,

Niazi,

Kumar

et al. 2024

SSURJET

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Liquid antennas are distinct types of antennas that have been widely used due to their low profile, reconfigurable, and tunable features with steering abilities. In this paper, a low profile, high directivity, and good efficiency reconfigurable Water-Dense Dielectric Patch Antenna (DDPA) fed by the coaxial probe is presented. Distilled water becomes lossy above 1 GHZ frequency, so it is best suitable for lower-frequency applications. A thick substrate between the water patch and the ground plane is used. An impedance bandwidth of 7% with a maximum gain of 7.78 dBi, and radiation efficiency up to 71 % is obtained. This antenna can operate over the 967 to 1038 MHz band without a reduction in radiation efficiency. Simulated results are presented to validate the new design in both CST microwave studio and ANSYS HFSS which are the best simulating software for antenna designing. The comparison shows that the new antenna has a more compact size, and simpler structure, and is suitable for low-frequency applications.

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Section: Problem Statement and Proposed Solutionmentioning

confidence: 99%

Design and Validation of Water Based Dense Dielectric Patch Antenna (DDPA) for Microwave Communication around Frequency of 1GHz

Mukhtar,

Niazi,

Kumar

et al. 2024

SSURJET

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show abstract

“…Reconfigurable antennas have the capability of changing or switching various characteristics i.e., frequency, radiation pattern and polarization. For that reason, they have been reported to be used in various applications such as communication systems, military devices, cognitive radio systems, and biomedical applications [1][2][3].…”

Section: Introductionmentioning

confidence: 99%

“…On the other hand, mechanical reconfiguration techniques for antennas such as beam steering using motors also require active devices and may face wear-and-tear issues. Therefore, there is a need for a suitable and sustainable method without the need of integrating any active devices, and a good potential method for reconfiguring antenna properties is by changing its physical structure [1][2][3].…”

Section: Introductionmentioning

confidence: 99%

Passively Reconfigurable Antenna Using Gravitational Method

Satitchantrakul,

Manapreecha,

Phongpatrawiset

et al. 2024

Communications in Computer and Information Science

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This paper proposes a passive reconfigurable antenna by using liquid metal and gravity mechanism. When the antenna rotates to different angles, the liquid metal will flow to the lowest point of the container due to gravitational force, thereby acting as a reflector to redirect the main antenna radiation pattern at predefined angles at 5.8 GHz (ISM band). The upper section patterns can be maintained when antenna is tilted at 45°, 90°, 135°, 225°, 275° and 315° whereas the rotated antenna at 0° and 180° causes a forward radiation. More importantly, additional directors surrounding the main patch can be used to increase the directivity of these radiation patterns. Simulation results in terms of reflection coefficient, radiation patterns and gain indicate that the proposed antenna operated passively with a consistent bandwidth of approximately 400 MHz.

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“…Antenna array plays a vital role in next-generation wireless communication (5G-Massive MIMO and beyond). New age antennas like reconfigurable antennas adapt themselves with operating frequency, radiation pattern, and polarization as per the user's requirement [25]. Adaptive antennas can now be used for very fast-moving vehicles [26].…”

Section: Introductionmentioning

confidence: 99%

Performance of Smart Antenna Under Different Fading Conditions

Senapati

Patro

Sooksood

et al. 2021

Wireless Pers Commun

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Optimizing the current distribution of an evenly spaced antenna array has shown to be an efficient approach for reducing side lobe levels. In this article, the Tchebyscheff distribution-based antenna array synthesis approach is combined with an adaptive signal processing algorithm for beamforming and side lobe level reduction in smart antennas in various fading situations. The performance of smart antennas in uniformly spaced linear, planar, circular, and semi-circular arrays are evaluated. The presence of Rayleigh and Rician channels is examined in the network. The least mean square (LMS) and normalised least mean square (NLMS) algorithms are applied as adaptive algorithms. In fading environments, the NLMS algorithm with Tchebyscheff distribution outperforms than the LMS algorithm with Tchebyscheff distribution, with a side lobe level decrease of 11.23 dB. The lowest side lobe achieved with the NLMS algorithm with Tchebyscheff distribution is − 45.59 dB for uniform planar array.

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Reconfigurable Antennas for Advanced Wireless Communications: A Review

Cited by 34 publications

References 152 publications

Design and Validation of Water Based Dense Dielectric Patch Antenna (DDPA) for Microwave Communication around Frequency of 1GHz

Design and Validation of Water Based Dense Dielectric Patch Antenna (DDPA) for Microwave Communication around Frequency of 1GHz

Passively Reconfigurable Antenna Using Gravitational Method

Performance of Smart Antenna Under Different Fading Conditions

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