Asymmetrical fed Calendula flower-shaped four-port 5G-NR band (n77, n78, and n79) MIMO antenna with high diversity performance

Addepalli, Tathababu; Vidyavathi, T.; Neelima, K.; Sharma, Manish; Kumar, Dinesh

doi:10.1017/s1759078722000800

Cited by 27 publications

(12 citation statements)

References 36 publications

(66 reference statements)

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“…Compared with the antennas reported in Mathur and Dwari, 12 Tang et al, 13 Chacko et al, 16 and Gao et al, 18 the proposed antenna has higher isolation. In Addepalli et al, 21 the suggested antenna offers a significantly smaller bandwidth, and the isolation between antenna elements is below −15 dB, which is relatively low compared to the proposed antenna. In Mirzababaee et al, 23 the antenna does not show MIMO characteristics and reconfigurability.…”

Section: Description Of the Antennamentioning

confidence: 78%

“…The radiating patch is made out of an inverted T‐shaped stub that filters the WiMAX band and two elliptical slots that reduce interference from the WLAN and satellite downlink systems. Addepalli et al 21 describe a four‐port MIMO antenna built for 5G‐NR band applications such as n77: 3.30–4.20 GHz, n78: 3.30–3.80 GHz, and n79: 4.40–5.00 GHz. The suggested design is divided into a single‐element asymmetrical fed Calendula flower‐shaped antenna and a four‐port modified MIMO antenna with a connected ground.…”

Section: Introductionmentioning

confidence: 99%

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A reconfigurable wideband MIMO antenna combines RF energy harvesting

Das,

Karmakar

2023

Int J Communication

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SummaryThis article introduces a novel and groundbreaking approach combining multiple‐input‐multiple‐output (MIMO) technology with radio frequency (RF) energy harvesting. The proposed antenna consists of two semi‐circular monopole antenna components, optimized with dimensions of 89 × 51.02 × 1.6 mm3, that share a common ground plane to achieve MIMO characteristics. A series of split‐ring resonators on the ground plane significantly enhances the isolation between the two radiating components. Band‐notched features are performed in the 3.5 GHz WiMAX and 5.5 GHz WLAN bands through modified C‐shaped slots in the radiating patch and two rectangular split‐ring resonators serving as parasitic devices near the feed line. The reconfiguration of band‐notching is made possible by controlling the modes of the embedded PIN diodes. The two antenna elements maintain mutual coupling below −18 dB from 1.5–13 GHz, achieving an impressive 158.62% impedance bandwidth. The antenna's efficiency and gain experience significant drop, indicating effective interference suppression at the center frequencies of the notch bands, and its performance in MIMO systems is assessed through parameters including envelope correlation coefficient, port isolation, radiation patterns, efficiency, gain, and diversity gain. The simulated properties of the designed antenna closely align with the measured outcomes, demonstrating its reliability and consistency. Moreover, the article evaluates the antenna's potential for RF energy harvesting, achieving a maximum harvested energy of 4.88 V. This proposed antenna can be used in multiple applications, like wideband, band‐notching MIMO, and RF energy harvesting. This proposed antenna is an efficient, reconfigurable wideband MIMO antenna with novel RF energy harvesting capability.

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Section: Description Of the Antennamentioning

confidence: 78%

Section: Introductionmentioning

confidence: 99%

A reconfigurable wideband MIMO antenna combines RF energy harvesting

Das,

Karmakar

2023

Int J Communication

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“…The challenges encountered in designing these antennas have fuelled the advancement in the field of the antenna due to reasons such as the need for antennas with smaller physical size, lower weight, and cost, multi-wideband bandwidths, the capability of reconfigurable, etc. Therefore, the breakthrough in designing these antennas has emerged in the form of the TCMs [28][29][30] which gives freedom to analyze the physics behind the key attributes including bandwidth polarization and distribution of surface current density (SCD) on a patch of antenna and ground. The theory behind TCM is older than 50 years which was proposed by Garbacz in 1965.…”

Section: Tcm Analysis Implementation On 2 × 2 Mimo Configurationmentioning

confidence: 99%

“…High rejection triple notched band UWB-X band is achieved on high permittivity dielectric substrate with permittivity 11.2 [27]. CMA analysis is carried out by using 7-modes which achieves n77/n78/n79 bands [28], and assymetrical Calendula-shape radiating patch also exhibits of achieveing three bands [29]. The modal analysis is applied to sloteed anteena [30] for UWB applications with the use of 5-modes.…”

Section: Introductionmentioning

confidence: 99%

A detailed insight of 2 × 2 high isolation wideband dual notched band MIMO antenna with evolution initiated by theory of characteristics mode

Sharma

Addepalli²,

Manda³

et al. 2023

Int. J. Microw. Wireless Technol.

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This research investigates the MIMO antenna by using the Theory of Characteristics Mode (TCM) where 10 modes are subjected in designing. Also, 5 modes are the significant mode and 2 modes correspond to non-significant which defines the operating bandwidth and notched bands. The proposed 2 × 2 MIMO antenna configuration is designed for wideband applications with a size of 0.44 × 0.68 mm2. The two isolated 12-sided polygons radiating patches placed adjacent to each other share a common ground which is printed on an FR4 substrate. The measured impedance bandwidth covers bandwidth 3.11–11.98 GHz with two bands rejecting capability: Wireless Local Area Network (WLAN) and Downlink-Uplink Satellite (DUS) system. These two interfering bands are mitigated by etching a C-type slot on the radiating patch and an inverted U-type slot in the microstrip feed. The simulated and measured results are also compared in the far-field region (Normalized Radiation Efficiency (NRE), Peak Gain (PG), and 2-D/3-D radiation pattern). Proposed MIMO antenna also offers good diversity performance with ECC2×2 < 0.00001, DG2×2 > 9.999 dB, TARC2×2 < −15.0 dB, CCL2×2 < 0.001 b/s/Hz and MEG2×2 ≅ −3.0 dB.

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“…The recent developments in UWB MIMO antennas with improved isolation and notch characteristics is presented in detail in the literature [5]. This reduction in coupling in achieved by using various methods like polarisation diversity with parasitic stubs [6], meta‐materials [7], parasitic elements [8], matching networks [9], shared radiators [10] and so on.…”

Section: Introductionmentioning

confidence: 99%

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

Addepalli

Manda²,

Vidyavathi

et al. 2023

Int J Communication

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The design of novel compact two-element and eight-element lotus shaped multiple-input-multiple-output (MIMO) antenna system employing pattern diversity with enhanced isolation characteristics is presented. The proposed two-element antenna system is arranged rotationally on a square-hollow substrate resulting in an eight-element MIMO antenna system employing pattern diversity. The developed eight-element MIMO antenna system resonates in the frequency range 3.1 to 14.6 GHz housing the complete UWB band with triple band-notch characteristics at 3.7-4.5 GHz (C-band satellite down link [3.7-4.2 GHz]), 5.1-5.9 GHz (WLAN) and 6.8-8.25 GHz (X-band satellite down link (7.25-7.75 GHz) and up link (7.9-8.4 GHz)) bands. The antenna system gives element-to-element isolation of more than 25 dB in the majority of the operating band with a peak gain of 6.8 dBi and a maximum 90% efficiency. The important MIMO metrics like ECC (envelope correlation coefficient), DG (diversity gain), total active reflection coefficient (TARC), channel capacity losses (CCL) and MEG (mean effective gain) are presented for both twoelement and eight-element to estimate the performance the proposed antennas in multi-antenna environments. The both two-and eight-element designs are fabricated and the measured results of those are well agreed with simulation results.

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Asymmetrical fed Calendula flower-shaped four-port 5G-NR band (n77, n78, and n79) MIMO antenna with high diversity performance

Cited by 27 publications

References 36 publications

A reconfigurable wideband MIMO antenna combines RF energy harvesting

A reconfigurable wideband MIMO antenna combines RF energy harvesting

A detailed insight of 2 × 2 high isolation wideband dual notched band MIMO antenna with evolution initiated by theory of characteristics mode

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

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