Smart Antennas for Advanced Communication Systems

Chang, Dau‐Chyrh; Hu, Cheng-Nan

doi:10.1109/jproc.2012.2187409

Cited by 35 publications

(5 citation statements)

References 42 publications

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“…Not only the data rates can be increased and error rates can be improved by deploying multiple antennas, but also the SNR at the receiver site can be improved and the co-channel interference in a multi-user scenario can be suppressed by using it. Both goals can be accomplished by means of smart antennas and the use of beam-forming techniques (Chang, & Hu, 2012).…”

Section: Smart Antennasmentioning

confidence: 99%

Diversity Techniques in Wireless Communication Systems: A Review

Keti

2023

ejtas

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Fading can be considered as the major impairment of wireless communication channels. To overcome this problem, diversity techniques have been proposed. Diversity is a powerful communication technique that can be applied in time, frequency, and spatial domains in order to enhance communication system performance. The doctrine of diversity is based on the idea of deploying multiple antennas to transmit/receive multiple copies from the desired signals over independent paths to avoid simultaneous fading. In this paper a review of diversity techniques is done. An overview of differently proposed diversity techniques is made to highlight the problem statement in each of it and how the solutions are suggested and applied to conclude the best proposed ones to mitigate the problem of fading in wireless communication channels. The use of multiple antennas at both ends of the system and the principles of MIMO systems is also discussed in this article. Finally, the application of MIMO systems into 5G communication systems is reviewed.

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Section: Smart Antennasmentioning

confidence: 99%

Diversity Techniques in Wireless Communication Systems: A Review

Keti

2023

ejtas

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“…Researchers have tended to solve the limited frequency spectrum by using different techniques to improve and enhance the data transmission, as well as to reduce energy consumption [7]- [9]. Smart antennas are considered one of the most promising technologies to handle these problems, where it's simply produced by attaching an ordinary antenna with certain algorithms to steer the main radiation pattern into the desired users while reducing the energy consumed by minimizing the sidelobes level (SLL) [10], [11]. This can be achieved through direct beamforming [12]- [23].…”

Section: Introductionmentioning

confidence: 99%

Sidelobe level minimization for uniform circular smart antenna array using cultural algorithm

Mohsin¹,

Daghal

Sallomi

2021

IJEECS

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Cultural algorithm (CA) is a new evolutionary program inspired by sociology and archaeology theories that assisting formulating cultural evaluation. Its use to solve optimization problems. This paper analyzed the beamforming of a uniform circular antenna array (UCAA) via using the CA algorithm. The sidelobe level (SLL) is minimized by adjusting the appropriate weight for each element. In addition, the optimal beam pattern is achieved by using CA for UCAA, which means that the main beam is steering to the desired user, while the nulls represent the interference signals. The excitation amplitude is supposed to be constant while the elements are assumed isotropic. The circular array number elements and the interspacing distance between them are setting as optimization parameters. The simulation results show that the CA rationally reacts to the changing environments, and it is valuable for SLL reduction. A −25 dB of relative SLL is achieved under beam scanning (0º) and (15º), respectively.

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“…Instead, low-profile antennas with directive beams are demanded for ease of integration with radio-frequency circuits for achieving compact transceiver structures. At microwave frequencies, this can be realized with printed dipole antenna arrays 4 , microstrip antenna arrays 5 , leaky-wave antennas 6 , Fresnel–zone plate antennas 7 , Fabry-Perot antennas 8 , or metasurface antennas 9 , using conventional photolithography techniques. Microfabrication technologies similar to those used in the semiconductor industry have been applied to form on-chip integrated antenna arrays on silicon (Si) substrates 10–12 .…”

Section: Introductionmentioning

confidence: 99%

A microfabricated low-profile wideband antenna array for terahertz communications

Luk

Zhou

et al. 2017

Sci Rep

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While terahertz communications are considered to be the future solutions for the increasing demands on bandwidth, terahertz equivalents of radio frequency front-end components have not been realized. It remains challenging to achieve wideband, low profile antenna arrays with highly directive beams of radiation. Here, based on the complementary antenna approach, a wideband 2 × 2 cavity-backed slot antenna array with a corrugated surface is proposed. The approach is based on a unidirectional antenna with a cardiac radiation pattern and stable frequency characteristics that is achieved by integrating a series-resonant electric dipole with a parallel-resonant magnetic dipole. In this design, the slots work as magnetic dipoles while the corrugated surface radiates as an array of electric dipoles. The proposed antenna is realized at 1 THz operating frequency by stacking multiple metallized layers using the microfabrication technology. S-parameter measurements of this terahertz low-profile metallic antenna array demonstrate high efficiency at terahertz frequencies. Fractional bandwidth and gain are measured to be 26% and 14 dBi which are consistent with the simulated results. The proposed antenna can be used as the building block for larger antenna arrays with more directive beams, paving the way to develop high gain low-profile antennas for future communication needs.

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Smart Antennas for Advanced Communication Systems

Cited by 35 publications

References 42 publications

Diversity Techniques in Wireless Communication Systems: A Review

Diversity Techniques in Wireless Communication Systems: A Review

Sidelobe level minimization for uniform circular smart antenna array using cultural algorithm

A microfabricated low-profile wideband antenna array for terahertz communications

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