Parametric Analysis of Compact UWB-MIMO Antenna with Improved Isolation Using Parasitic Reflectors and Protruded Ground Strips

Addepalli, Tathababu; Anitha, V. R.

doi:10.1007/s11277-021-09235-z

Cited by 15 publications

(3 citation statements)

References 30 publications

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“…The essential parameter for radiation performance and bandwidth of the system is TARC. Equation () is used to evaluate the TARC, 39,40 and

θ

is considered as 0°.

italicTARC goodbreak= \sqrt{\frac{|{(S_{11} + S_{12} e^{italicjθ})}^{2}| + |{(S_{21} + S_{22} e^{italicjθ})}^{2}|}{2}}

…”

Section: Resultsmentioning

confidence: 99%

An inverted U‐shaped merged stubs hexa‐band 4‐element MIMO antenna for advanced wireless applications

Addepalli,

Vidyavathi,

Chakradhar

et al. 2024

Int J Communication

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SummaryA four‐element hexa‐band inverted U‐shaped merged stubs miniaturized Multiple‐Input Multiple‐Output (MIMO) radiator, operating in 2.10–2.17 GHz for 3G (2.17 GHz) band, 2.52–2.60 GHz for 4G (2.5 GHz) band, 3.31–3.46 GHz for 5G (3.4 GHz [n77 and n78]) bands, 3.66–3.72 GHz for 5G (3.7 GHz [n77 and n78]) bands, 4.53–4.62 GHz for 5G (4.5 GHz [n79]) band, and 5.15–6.02 GHz for 5.5 GHz WLAN bands, is developed. The radiator and ground planes comprise of multiple inverted U‐shaped stubs and slots to form the proposed configuration having overall compact dimensions of 62 × 62 × 1.6 mm3. The peak gain and radiation efficiency of the antenna are found to be 1.31 dBi and 77.48% at 2.17 GHz, 0.98 dBi and 63.3% at 2.55 GHz, 2.9 dBi and 71.13% at 3.38GHz, 1.6 dBi and 66.68% at 3.68 GHz, 2.58 dBi and 77% at 4.57 GHz, and 3.27 dBi and 68.68% at 5.52GHz. The arrangement of four antenna elements is orthogonal (rotationally symmetric) to minimize the mutual coupling, and hence, a minimum isolation of more than 15 dB is noted between all the antenna ports. Furthermore, Envelope Correlation‐Coefficient (ECC) in desired bands is lower than 0.012. Channel Capacity‐Loss (CCL) and Diversity‐Gain (DG) are also good with 0.015 bits/s/Hz and 9.96 dB, respectively. The fabricated structure measurement results agree well with simulation outcomes. These facts result that the proposed MIMO structure is a promising module for the usage in WLAN, 4G, and 5G band applications.

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“…The essential parameter for radiation performance and bandwidth of the system is TARC. Equation () is used to evaluate the TARC, 39,40 and

θ

is considered as 0°.

italicTARC goodbreak= \sqrt{\frac{|{(S_{11} + S_{12} e^{italicjθ})}^{2}| + |{(S_{21} + S_{22} e^{italicjθ})}^{2}|}{2}}

…”

Section: Resultsmentioning

confidence: 99%

An inverted U‐shaped merged stubs hexa‐band 4‐element MIMO antenna for advanced wireless applications

Addepalli,

Vidyavathi,

Chakradhar

et al. 2024

Int J Communication

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“…These are essential parameters for any MIMO antenna to determine whether the antenna is perfectly working in a free space environment or not. In a MIMO system, the ECC parameter is utilised to determine the correlation between the channels [19], [20].The ideal values of ECC are zero (uncorrelated) and one (more correlation). The proposed MIMO antenna ECC values are below 0.05 for both measured and simulation results.…”

Section: Resultsmentioning

confidence: 99%

Compact and asymmetric fed modified hexagonal shaped multiple-input multiple-output (MIMO) antenna for 5G sub: 6 GHz (N77/N78 & N79) and WLAN applications

Gollamudi

Narayana

Prasad

2022

Analog Integr Circ Sig Process

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In the current work, a compact and modi ed hexagonal-shaped circular MIMO antenna for WLAN and 5G sub-6GHz applications is presented. The proposed MIMO antenna works in the band of 2.95 to 6.3 GHz, that covers the complete range of 5G sub: 6 GHz (N77/N78 & N79) and WLAN bands. The overall working region is obtained with isolation of greater than 15 dB. With an impedance of 50 strip line, the suggested MIMO antenna is excited using an asymmetric feeding approach. Simulated and measured results from fabricated prototypes are used to con rm the diversity and radiation performance of the proposed MIMO antenna. The diversity metric parameters ECC, DG, TARC, CCL, and MEG values demonstrate strong agreement. The construction is created on a FR4 substrate with dimensions of 20 × 34 mm 2 , 1.6 mm in height, and 4.4 as the constant. The structure has e ciency and gain values of above 83% and 0.2 to 3 dBi, respectively. IntroductionMultipath fading problems in the free space environment are reduced by a new technology in wireless communication known as the Multiple Input Multiple Output (MIMO) technology. The additional features of MIMO technology are channel capacity improvement, higher data rate, quality transmission, and reliability in transmission. Now a days most electronic gadgets are portable. The users demand portable devices with high-speed data rates and quality of transmission. The MIMO technology is very much suitable for user demands. In MIMO technology number of elements are placed in a limited space, there fore high coupling is introduced between the elements. Few techniques are proposed by the researchers and also checked [1][2][3]. Day by day cellular communication is increasing rapidly. Due to its bene ts, such as increased data rates and channel capacity, 5G wireless communication is in demand. The combination of MIMO with 5G cellular systems play a tremendous role in current wireless cellular communication [4][5][6].A simple planar antenna is proposed for 5G cellular applications [7]. A CPW fed two-element MIMO antenna for dual-band applications is presented [8]. A microstrip patch antenna designed for 5G NR bands is speci ed [9]. For 5G sub: 6 GHz and WLAN applications, a differently fed recon gurable MIMO antenna is proposed [10]. Microstrip patch dipole antenna for 4G LTE and 5G NR bands is designed [11]. A two-element transparent MIMO antenna for 5G sub: 6 GHz applications is designed [12]. A semi-circular arc-shaped MIMO antenna for 5G and WLAN bands with a modi ed strip placed between them to improve the isolation is proposed [13]. For 5G, WLAN, and WiMAX bands, a triple-band MIMO antenna is constructed [14]. Array antenna for 5G cellular applications is presented [15]. A small wideband MIMO antenna for 5G and WLAN applications is designed [16]. Compact two and four-element MIMO antenna for UWB applications with loaded square patch strips is used for isolation enhancement [17]. The twoelement dual-band antenna that covers 5G N77 and N79 bands is developed [18]. Some of the most recent papers in the...

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“…The ECC using S-parameters is represented in Equation ( 1), and compared results are presented in Fig. 7(a) [19,20]. The diversity gain (DG) is also calculated using ECC results.…”

Section: Mimo Performancementioning

confidence: 99%

A NOVEL COW-HEAD SHAPED MULTIPLE INPUT MULTIPLE OUTPUT ANTENNA FOR 5G SUB: 6 GHZ N77/N78 & N79 BANDS APPLICATIONS

Gollamudi¹,

Narayana²,

Prasad³

2022

PIER C

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The present work proposes a novel cow-head shaped multiple input multiple output (MIMO) antenna for 5G sub:6 GHz applications, which include N77/N78 (3.3-4.2 GHz/3.3-3.8 GHz) and N79 (4.4-5.0 GHz) bands. The proposed work is designed and developed on a 30×66 mm 2 size FR4 substrate with a dielectric constant of 4.4 and loss of tangent of 0.002. The proposed design works in the region from 3.3 to 5 GHz, and an isolation above 18 dB is attained. The parametric analysis and surface current distribution are studied for the optimization of parameters, and the coupling between elements is analyzed respectively. The performance of the design is studied in terms of efficiency (≥ 91.5%), peak gain (3.1-4.6 dBi), and radiation patterns (E & H fields). The diversity parameters (ECC, DG, TARC, CCL, & MEG) are calculated and checked, the same as measured results. Then all the measured results of the fabricated prototype are compared with simulated ones, and they are in good agreement.

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Parametric Analysis of Compact UWB-MIMO Antenna with Improved Isolation Using Parasitic Reflectors and Protruded Ground Strips

Cited by 15 publications

References 30 publications

An inverted U‐shaped merged stubs hexa‐band 4‐element MIMO antenna for advanced wireless applications

An inverted U‐shaped merged stubs hexa‐band 4‐element MIMO antenna for advanced wireless applications

Compact and asymmetric fed modified hexagonal shaped multiple-input multiple-output (MIMO) antenna for 5G sub: 6 GHz (N77/N78 & N79) and WLAN applications

A NOVEL COW-HEAD SHAPED MULTIPLE INPUT MULTIPLE OUTPUT ANTENNA FOR 5G SUB: 6 GHZ N77/N78 & N79 BANDS APPLICATIONS

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