Compact Sub-6 GHz and mmWave 5G Wideband 2 × 1 MIMO Antenna with High Isolation Using Parasitically Placed Double Negative (DNG) Isolator

Sharma, Rashbha; Khanna, Rajesh; Geetanjali, .

doi:10.1007/s11277-021-09032-8

Cited by 12 publications

(4 citation statements)

References 36 publications

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“…The utilization of a fractal geometry of modified Sierpinski, incorporating a squared stub in the ground plane, has been shown to offer improved bandwidth and isolation, as seen in reference [24]. Metamaterials have been employed to achieve improved isolation, as indicated by previous studies [25,26]. Shorting pins are also used for isolation enhancement [27].…”

Section: Introductionmentioning

confidence: 99%

Design of a Modified MIMO Antenna Based on Tweaked Spherical Fractal Geometry for 5G New Radio (NR) Band N258 (24.25–27.25 GHz) Applications

Bisht,

Malik,

Das

et al. 2023

Fractal Fract

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This article describes a fractal-based MIMO antenna for 5G mm-wave mobile applications with micro-strip feeding. The proposed structure is a fractal-based spherical configuration that incorporates spherical slots of different iterations on the patch, as well as rectangular slots on the ground plane. These additions are meant to reduce patch isolation. The two-element MIMO antenna has closely spaced antenna elements that resonate at multiple frequencies, 9.5 GHz, 11.1 GHz, 13.4 GHz, 15.8 GHz, 21.1 GHz, and 26.6 GHz, in the frequency range of 8 to 28 GHz. The antenna’s broadest operational frequency range spans from 17.7 GHz to 28 GHz, encompassing a bandwidth of 10,300 MHz. Consequently, it is well-suited for utilization within the millimeter wave (mm wave) application, specifically for the 5G new radio frequency band n258, and partially covers some other bands X (8.9–9.9 GHz, 10.4–11.4 GHz), and Ku (13.1–13.7 GHz, 15.4–16.2 GHz). All the resonating bands have isolation levels below the acceptable range of (|S12| > −16 dB). The proposed antenna utilizes a FR4 material with dimension of 28.22 mm × 44 mm. An investigation is conducted to analyze the effectiveness of parameters of the antenna, including radiation pattern, surface current distributions and S parameters. Furthermore, an examination and assessment are conducted on the efficacy of the diversity system inside the multiple input multiple output (MIMO) framework. This evaluation encompasses the analysis of key performance metrics such as the envelope correlation coefficient (ECC), diversity gain (DG), and mean effective gain (MEG). All antenna characteristics are determined to be within a suitable range for this suggested MIMO arrangement. The antenna design underwent experimental validation and the simulated outcomes were subsequently verified.

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Section: Introductionmentioning

confidence: 99%

Design of a Modified MIMO Antenna Based on Tweaked Spherical Fractal Geometry for 5G New Radio (NR) Band N258 (24.25–27.25 GHz) Applications

Bisht,

Malik,

Das

et al. 2023

Fractal Fract

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“…The world is transitioning to 5G technology to accommodate the exponential rise of global mobile data traffic and the billions of existing wireless devices [2]. Due to its capacity to transmit large amounts of data across vast distances, the sub-6 GHz band is an excellent choice for 5G systems [3], [4]. A multi-band antenna is always better than separate antennas operating at different frequencies.…”

Section: Introductionmentioning

confidence: 99%

A Compact Two-Element Linearly and Orthogonal Circularly Polarized MIMO Antenna System for 5G Cellular and WLAN/Wi-Fi 6E Application

Neamah,

Sabbagh,

Al-Rizzo

2023

IEEE Access

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This paper presents the design, analysis, and experimental validation of a compact 21 MIMO antenna operating in two bands. Band 1 is Linearly Polarized (LP) with spatial diversity operating in the sub-6 GHz band for the Fifth Generation (5G). Band 2 is Circularly Polarized (CP) for polarization and pattern diversity with an axial ratio below 3 dB for WLAN, Wi-Fi 6E, and C-band applications. The proposed single antenna consists of a Squared Shape Modified Monopole with partially Defected Ground (SMMDG) fed by Co-Planar Waveguide CPW. The partial ground has a defect on its upper left side and an I-shaped strip on the right side. The two MIMO radiators are arranged in oppositely flipped shapes. The decoupling and common partial ground structure consists of an opposite, Double T-Shaped Strip (DTSS) with a common strip head that performs as a band-stop filter. The overall dimensions of the MIMO antenna are 31.5451.6 mm 3 . The simulated impedance bandwidth of the first band with LP lies between 3.1 and 4.7 GHz, for which S 11 and S 22 < -10 dB, while the measured values are between 3.45 GHz and 4.8 GHz. The simulated impedance bandwidth for the second band for S 11 and S 22 < -10 dB lies between 5.24 and 7.9 GHz, while the measured one lies between 5.65 GHz and 9 GHz. The simulated 3-dB Axial Ratio Bandwidth (ARBW) within Band 2 is (5.6-8.5) GHz, while the measured 3-dB ARBW is (5.95-8.1) GHz. The minimum simulated isolation between the two ports is 17 dB in Band 1 and 26 dB in Band 2, while the minimum measured isolation is 21 dB in Band 1 and 26 dB in Band 2. Wi-Fi 6E (n96) (5.925-7.125) GHz is covered with right-hand circular polarization (RHCP) in the positive Z direction and left-hand circular polarization (LHCP) in the negative Z direction, covering Band 2 with an axial ratio less than 3 dB. Other crucial MIMO metrics are also calculated, such as the Envelope Correlation Coefficient (ECC), Mean Effective Gain (MEG), and Diversity Gain (DG). The antenna provides excellent MIMO diversity performance, which makes it an excellent candidate for many portable wireless applications.

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“…Different types of dielectrics materials are available for wearable antennas such as jeans [1][9], silk [2], Teflon [10], felt [4][11] [12], polyester [6][13], FR4 [7], flexible rogers [14], polyimide [3], Taconic-RF [8], and cotton [15]. Low dielectric constants fabrics are used to reduce surface wave loss and improve bandwidth [2].…”

Section: Introductionmentioning

confidence: 99%

“…Low dielectric constants fabrics are used to reduce surface wave loss and improve bandwidth [2]. Wearable structures for various applications can be found, such as patch antenna for tumor and cancer detection [2][8] [9], MIMO antenna for sub 6 GHz and millimeter wave [14], patch antenna for Wi-MAX/ WLAN/Wi-Fi/5G applications [1][5][6] [11]. In general, simple patch antenna designs suffer from low gain, low bandwidth, and low efficiency, which can be overcome by advert of Vivaldi antenna having advantages such as wider bandwidth, low cross polarization, high directivity, and high efficiency etc.…”

Section: Introductionmentioning

confidence: 99%

Compact Wideband Wearable Antipodal Vivaldi Antenna for 5G Applications

Sahoo

Al‐Hadi

Azemi

et al. 2022

2022 IEEE International RF and Microwave Conference (RFM)

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In this paper, a compact wearable antipodal Vivaldi antenna resonating at 3.5 GHz is proposed for 5G n77 and n78 bands. It is designed on a flexible polyester substrate with a dielectric constant (ɛr) of 2 and loss tangent (tan δ) of 0.005. The antenna parameters were optimized via parametric analyses using CST software with a size of 33 × 33 mm 2 (length × width). The antenna is evaluated in terms of reflection coefficient (S11), gain, efficiency, radiation pattern and surface current density and itsreflection coefficient is verified with measurement. This antenna attained a maximum simulated gain of 4.17 dBi and an efficiency of 98.18 % in the resonating band.

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Compact Sub-6 GHz and mmWave 5G Wideband 2 × 1 MIMO Antenna with High Isolation Using Parasitically Placed Double Negative (DNG) Isolator

Cited by 12 publications

References 36 publications

Design of a Modified MIMO Antenna Based on Tweaked Spherical Fractal Geometry for 5G New Radio (NR) Band N258 (24.25–27.25 GHz) Applications

Design of a Modified MIMO Antenna Based on Tweaked Spherical Fractal Geometry for 5G New Radio (NR) Band N258 (24.25–27.25 GHz) Applications

A Compact Two-Element Linearly and Orthogonal Circularly Polarized MIMO Antenna System for 5G Cellular and WLAN/Wi-Fi 6E Application

Compact Wideband Wearable Antipodal Vivaldi Antenna for 5G Applications

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