Optimized Super-Wideband MIMO Antenna with High Isolation for IoT Applications

Khurshid, Adnan; Dong, Jian; Ahmad, Mir Swad; Shi, Ronghua

doi:10.3390/mi13040514

Cited by 19 publications

(5 citation statements)

References 32 publications

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“…Table 1 shows a comparison of the proposed MIMO antenna design to other reported wideband antennae. In contrast to the above-reported antenna designs [27][28][29][30][31][32][33][34][35][36][37][38][39][40][41], the designed SWB MIMO antenna is novel in terms of size, the number of resonating elements, bandwidth ratio, and notch bands. The proposed CPW-fed antenna elements with common ground planes can be easily incorporated into the matching networks or portable monolithic microwave integrated circuits (MMICs).…”

Section: Related Workmentioning

confidence: 98%

“…An SWB MIMO antenna with spade-shaped resonating elements was proposed [38], where DGS and a windmill-shaped decoupler were used to increase isolation. An SWB MIMO antenna consisting of four monopole radiators with separated ground planes was reported in [39]. In [40], a quad-port SWB MIMO antenna configuration was presented with four wheelshaped radiators separated by a windmill-shaped decoupling structure to achieve isolation.…”

Section: Related Workmentioning

confidence: 99%

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Design and Implementation of a Planar MIMO Antenna for Spectrum-Sensing Applications

et al. 2023

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Spectrum sensing is an important aspect in cognitive radio (CR) networks as it involves the identification of unused frequency spectra, which saves both bandwidth and energy. The design of a compact super-wideband (SWB) multi-input multi-output (MIMO)/diversity antenna with triple-band-notched features is presented for spectrum sensing in CR systems. The MIMO antenna comprises four identical semi-elliptical-shaped monopole resonators, which are orthogonally positioned and excited individually via tapered coplanar waveguide feed lines. Also, a mirror-slot analogous to the radiator is etched in the ground conductor of each antenna element to achieve SWB characteristics. In order to avoid interference with the SWB, the antenna radiator is loaded with a staircase-shaped slit and a pair of concentric slits, arranged like a complementary split-ring resonator. The antenna resonates from 1.2 to 43 GHz, exhibiting a bandwidth ratio of 36:1. In the MIMO antenna, the antenna elements are located orthogonally, and the isolation > 18 dB and envelope correlation coefficient < 0.01 are realized in the resonating band. The antenna offers a peak gain of 4 dBi, and a sharp reduction in gain at notch frequencies (3.5 GHz, 5.5 GHz, and 8.5 GHz) is achieved. The size of the MIMO antenna is 52 mm × 52 mm. The proposed compact-size antenna features a high bandwidth ratio and straightforward design procedure, and can be simply integrated into contemporary RF equipment. The presented SWB MIMO antenna outperforms SWB antenna designs reported in the open literature, which featured one or two notched bands, whereas it has three notched bands. Also, the three notches in the SWB are achieved without the use of any filters, which simplifies the antenna development process.

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Section: Related Workmentioning

confidence: 98%

Section: Related Workmentioning

confidence: 99%

Design and Implementation of a Planar MIMO Antenna for Spectrum-Sensing Applications

et al. 2023

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“…Among them, DGS and EBG are more commonly applied in planar antenna array decoupling, due to their trapping properties for electromagnetic waves, which allow surface electromagnetic waves to resonate on the etched grooved surface. In a previous study [15], the resonant currents were concentrated on the edges of radiation patches and the ground plane. By introducing slots on the ground plane, an isolation performance was achieved below −20 dB and showed less impact on impedance matching.…”

Section: Introductionmentioning

confidence: 96%

A Design for a Wide-Band Antenna Pair Applied for Mobile Terminals at the Sub-6 GHz Band

Zhang

et al. 2022

Applied Sciences

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To meet the requirements of a high transmission rate and strong communication quality for mobile terminals, a planar antenna printed on a 0.8-mm-thick FR-4 substrate is proposed in this paper. The structures are compact, with a size of 23×6 mm2. The performance of a single antenna pair in a 75×35 mm2 ground plane shows the advantages of both ultra-wide bandwidth and high isolation. The operating frequency of −6 dB is 54% (3.3 GHz–5.9 GHz). To solve the mutual coupling effects exiting in the antenna pair, a hybrid strip defected grounding structure (DGS) is added in the middle of neighboring antenna elements, and good isolation performance of lower than −13 dB is achieved. The evolution and analysis of the proposed antenna pair are given to investigate the operating principle. To verify its practicality, an eight-port antenna system in 150×70 mm2 ground plane is constructed along two frames of the smartphone board. The MIMO antenna system performance is simulated and texted. The results show a bandwidth of 3.4–5.2 GHz (−6 dB), an isolation performance lower than −10 dB, an ECC lower than 0.01, and a total efficiency of 46–84%. In addition, the performance of the antenna system under single handheld conditions is also discussed. The correlation results show that the designed antenna pair has good data transmission and interference resistance capability, which proves that this is an excellent antenna model for application in mobile terminals.

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“…A triband MIMO antenna is also seen in literature with polarization diversity and a maximum ECC of 0.0471 [18]. A two-slot array antenna is proposed for 5.8 GHz frequency with an efficiency of 94% for ISM (Industrial Scientific and Medical) and Wi-Fi band IoT applications [19].…”

Section: Introductionmentioning

confidence: 99%

A Compact Two-Port Mimo Antenna With Suppressed Mutual Coupling for Iot Applications

Roges¹,

Malik²,

Sharma³

et al. 2022

PIER B

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Compact antenna with good performance characteristics is always preferred for small IoT (Internet of Things) sensor nodes. The novelty of this proposed work is not in terms of design but in terms of application as Log-Periodic antennas has been so far used for UHF/VHF (Ultra High Frequency/Very High Frequency) and TV reception applications, and in this paper, the advantages of Log-Periodic structure have been exploited for IoT applications. This antenna design consists of two Log-Periodic like structured radiating elements on an FR4 substrate of 1.6 mm thickness. The compact antenna of size of 15 mm × 17 mm covers a bandwidth ranging from 2.01 GHz to 4.04 GHz including the WiMAX (2.3 GHz-2.4 GHz, 2.5 GHz-2.7 GHz and 3.4 GHz-3.6 GHz) and WLAN (2.4 GHz and 3.6 GHz) frequency bands. This system employs Defected Ground Structure (DGS) technique to obtain the required range of bandwidth of operation, for improving the isolation and obtaining mutual coupling suppression between the two individual elements. This miniaturized cheap antenna has a very low ECC (Envelope Correlation Coefficient) value and all other MIMO (Multiple Input Multiple Output) parameters in acceptable range. The isolation obtained over the entire range of operation is below −30 dB, and the performance efficiency is as good as 92.8% with a maximum gain of 2.9 dB. The simulated and measured results of the antenna system are also found to be in good agreement. The MIMO system can be considered as a good candidate for medium range IoT applications for its small size and good performance.

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Optimized Super-Wideband MIMO Antenna with High Isolation for IoT Applications

Cited by 19 publications

References 32 publications

Design and Implementation of a Planar MIMO Antenna for Spectrum-Sensing Applications

Design and Implementation of a Planar MIMO Antenna for Spectrum-Sensing Applications

A Design for a Wide-Band Antenna Pair Applied for Mobile Terminals at the Sub-6 GHz Band

A Compact Two-Port Mimo Antenna With Suppressed Mutual Coupling for Iot Applications

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