Design of novel compact eight‐element lotus shaped UWB‐MIMO antenna with triple‐notch characteristics on hollow substrate

Addepalli, Tathababu; Manda, Rajasekhar; Vidyavathi, T.; Kamili, Jagadeesh Babu; Kumar, Bandi Kiran

doi:10.1002/dac.5465

Cited by 3 publications

(2 citation statements)

References 43 publications

(46 reference statements)

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“…It is a crucial metric for assessing the MIMO system's diversity performances, and Equation ( 17) is utilized mathematically to calculate MEG. 30 MEG k ¼ 0:5η k,rad ¼ 0:5 1À…”

Section: Mean Effective Gainmentioning

confidence: 99%

“…The amount of average power a diversity antenna receives relative to an isotropic antenna defines the MEG. It is a crucial metric for assessing the MIMO system's diversity performances, and Equation () is utilized mathematically to calculate MEG 30

{MEG}_{k} goodbreak= 0.5 η_{normalk, rad} goodbreak= 0.5 ((), 1 goodbreak- \sum_{normalx = 1}^{N} {|S_{kx}|}^{2}),

where

η_{normalk, rad}

represents radiation efficiency related to Port k and N refers to overall antenna ports.…”

Section: Designed Antenna's Diversity Performance Analysismentioning

confidence: 99%

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Compact body‐worn MIMO antenna with high port isolation for UWB applications

Pandey,

Biswas,

Chakraborty

2024

Int J Communication

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SummaryThis article investigates the mutual coupling reduction of a compact two elements wearable ultra‐wideband (UWB) multiple‐input multiple‐output (MIMO) antenna. The ground plane of the proposed wearable MIMO antenna structure consists of three connected square ring‐shaped stubs and two rectangular slots of narrow height. These ground stubs and slots minimize the mutual coupling effect between antennas and provide high isolation. The suggested MIMO antenna functions from the 1.87 to 13.82 GHz frequency spectrum covering WLAN (2.4–2.484 GHz), UWB (3.1–10.6 GHz), and X band (8–12 GHz) with 152.32% fractional bandwidth. It sustains port isolation above 27 dB throughout the 2 to 13.82 GHz frequency band. Inside the whole working frequency band, the suggested antenna offers a tiny envelope correlation coefficient (ECC < 0.098), greater diversity gain (DG > 9.93 dB), minimum channel capacity loss (CCL < 0.32 bits/s/Hz), and slight magnitude variation in mean effective gain of antenna ports (< 0.1 dB). The recommended antenna yields a SAR level below the designated threshold (<1.6 W/kg), affirming its suitability for body‐worn applications. The designed MIMO antenna structure has an overall volume of 32 × 48 × 1.5 mm3.

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“…It is a crucial metric for assessing the MIMO system's diversity performances, and Equation ( 17) is utilized mathematically to calculate MEG. 30 MEG k ¼ 0:5η k,rad ¼ 0:5 1À…”

Section: Mean Effective Gainmentioning

confidence: 99%

{MEG}_{k} goodbreak= 0.5 η_{normalk, rad} goodbreak= 0.5 ((), 1 goodbreak- \sum_{normalx = 1}^{N} {|S_{kx}|}^{2}),

where

η_{normalk, rad}

represents radiation efficiency related to Port k and N refers to overall antenna ports.…”

Section: Designed Antenna's Diversity Performance Analysismentioning

confidence: 99%

Compact body‐worn MIMO antenna with high port isolation for UWB applications

Pandey,

Biswas,

Chakraborty

2024

Int J Communication

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Four‐element equilateral triangular‐shaped MIMO antenna with connected ground for 5G sub:6 GHz N79 and WiFi‐6E band applications

Addepalli,

Nagaraju,

Medasani

et al. 2024

Int J Communication

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SummaryThe present communication presents a novel compact microstrip line feed dual‐band four‐element MIMO (multiple input multiple output) antenna for 5G sub‐6GHz N79 and WiFi‐6E bands with a defined size of 48 × 48 × 1.6 mm3. The FR4 substrate used in the construction of the designated antenna has a thickness of 1.6 mm, a relative permittivity of 4.4, and loss tangent values of 0.02. The proposed MIMO architecture consists of four equilateral triangle‐shaped antenna elements on top and ground with inverted L‐shaped stubs on the substrate's bottom layer. The ground structure of the antenna is a connected ground and is formed by defected ground parts which are connected with inverted L‐shaped stubs. The orthogonal structure of the MIMO antenna elements, with four armed square stubs among them, enhanced the isolation between surrounding antennas. The proposed four‐port MIMO antenna is built and tested in to validate design, scattering, and radiation performance, as well as MIMO diversity features. The designed antenna has more than 15 dB isolation and operates at 4.75 GHz from 4.45 to 5.2 GHz (5G sub‐6 GHz N79 band) and 6.3 GHz from 5.95 to 7.15 GHz (WiFi‐6E band). Furthermore, the design provides omnidirectional patterns, high gain (6.5dBi) and efficiency (>95%), a low envelope correlation coefficient (<0.00001) and acceptable diversity gain (10 dB), a good total active refraction coefficient (−10 dB) and low channel capacity loss (0.03 bit/s/Hz), and a considerable mean effective gain (MEG = −3 dB) and MEG ratio (0 dB). Because the simulated and tested results match so well, the antenna is a good candidate for 5G sub‐6 GHz N79 band operations.

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