Design and Analysis of UWB MIMO Antenna for Smart Fabric Communications

Govindan, Thennarasi; Palaniswamy, Sandeep Kumar; Kanagasabai, Malathi; Kumar, Sachin

doi:10.1155/2022/5307430

Cited by 7 publications

(8 citation statements)

References 45 publications

(46 reference statements)

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“…The diversity gain (DG) is used in MIMO-system gain enhancement and gives insight into the effects of the diversity on the wireless links. It is calculated using Equation (4) [41]:…”

Section: Diversity Gain (Dg)mentioning

confidence: 99%

“…It depends on the antenna S parameters and defines the return loss in the MIMO antenna. For the case of a two-element MIMO antenna, it can be estimated using the following equation [35,41], in which an ideal value of zero is desired:…”

Section: Total Active Reflection Coefficient (Tarc)mentioning

confidence: 99%

“…For a better performance, the CCL must be less than 0.4 bits/Hz/s [36,37]. It is calculated using the S parameters using Equations ( 6)-( 8) [36,39,41]:…”

Section: Channel Capacity Loss (Ccl)mentioning

confidence: 99%

See 2 more Smart Citations

Low-Profile UWB-MIMO Antenna System with Enhanced Isolation Using Parasitic Elements and Metamaterial Integration

Tighilt,

Bensid,

Sayad

et al. 2023

Electronics

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A new compact UWB multiple-input–multiple-output (MIMO) antenna is presented in this paper. The proposed antenna, with a compact size of 30 × 20 × 1.6 mm3, consists of a two-element microstrip line-fed pentagonal-shaped patch associated with a parasitic element and a partial ground plane. Three complementary split-ring resonator (CSRR) structures are integrated into the defected ground with the aims of reducing the mutual coupling and enhancing the bandwidth. A UWB impedance bandwidth is achieved covering the FCC band (3.1–10.6 GHz), corresponding to a reflection coefficient below −10 dB and a reduced mutual coupling below −22 dB. Additionally, acceptable limits of the diversity performance parameters are obtained. Furthermore, all the simulated outcomes of the suggested antenna are convenient for UWB-MIMO wireless applications. Measures carried out on the fabricated prototype of the antenna demonstrate good agreement between both the simulation and measurement results of the optimized two-port MIMO antenna.

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“…The diversity gain (DG) is used in MIMO-system gain enhancement and gives insight into the effects of the diversity on the wireless links. It is calculated using Equation (4) [41]:…”

Section: Diversity Gain (Dg)mentioning

confidence: 99%

Section: Total Active Reflection Coefficient (Tarc)mentioning

confidence: 99%

See 1 more Smart Citation

Low-Profile UWB-MIMO Antenna System with Enhanced Isolation Using Parasitic Elements and Metamaterial Integration

Tighilt,

Bensid,

Sayad

et al. 2023

Electronics

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“…Various DTs to reduce mutual coupling are presented in the literature. For example, placing AEs at 90 • [37][38][39][40][41][42][43][44][45][46] and 180 • [47][48][49], introducing DS [50][51][52][53][54][55][56][57][58][59], NL [60,61], DGS [62][63][64], metamaterial [65][66][67], PE [68][69][70], CBF [71], and SES [72].…”

Section: Decoupling Techniques (Dts) In Ultra-wideband Mimo Antennas ...mentioning

confidence: 99%

“…The AE was further developed into a MIMO antenna configuration with four elements placed orthogonally to each other in a single plane. In paper [44], the MIMO antenna was composed of four octagonal-shaped radiators with several slots loaded into them, which were placed orthogonally, as displayed in Figure 2h. In [45], the AE consisted of a circular patch that offers better impedance matching over the UWB range without the use of a feeding line, as shown in Figure 2i.…”

Section: Placing Aes At 90 • and 180 •mentioning

confidence: 99%

Decoupling Methods in Planar Ultra-Wideband Multiple-Input-Multiple-Output Antennas: A Review of the Design, State-of-the-Art, and Research Challenges

Jayant,

Srivastava,

Kumar

et al. 2023

Electronics

Self Cite

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Ultra-wideband (UWB) antennas cover a frequency range of 3.1 to 10.6 GHz and have sparked a lot of research interest as an essential part of wireless communication systems as they provide high data transmission speeds, are less expensive, and consume less power. UWB antennas are widely used in radar imaging, radio frequency identification, public security, and other high-accuracy positioning devices such as altimetry. Some smart applications of UWB antennas are vehicular radar systems, surveillance systems, software-defined radios, spectrum analysis, proximity fuses, etc. Multiple-input-multiple-output (MIMO) is a multiplexing technology that adopts multiple antennas both at the transmitter and receiver, which can enhance the channel capacity. MIMO technology is extensively used in several applications, such as in portable devices, wireless body area networks (WBANs), vehicular communication, and satellite–terrestrial networks. Generally, the MIMO antennas are used to obtain high reliability, high capacity, high throughput, and high security. The UWB MIMO antennas (UMAs) are considered the best choice for wireless communication systems as they offer reliability and wide transmission capacity, in contrast to unit antenna elements (AEs), without increasing system bandwidth or transmission power. The present-day and future communications systems need higher throughput to meet the demands of users. The signal transfer rate can be improved by improving channel bandwidth or increasing the number of receiving antennas. However, the main issue in designing UMAs is to provide high isolation between AEs because mutual coupling interactions between them affect the generated radiation patterns, leading to worse performance and failing to meet the operative constraints and requirements. When introducing decoupling techniques (DTs), researchers experience numerous challenges, including an increase in antenna size, design complexity, and cross-polarization. This article offers an organized review and simulated study of the various DTs in UMAs. The simulated study has been carried out through the implementation of various types of DTs on the same two-port UMA, which consists of two microstrip-fed circular-shaped AEs with open-end slotted partial ground. In contrast with previously reported review articles, this article provides a detailed study of various types of DTs reported so far and a better understanding for selecting appropriate DTs, which help in designing UMAs with better performance.

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