Compact wideband MIMO antenna for 4G WI-MAX, WLAN and UWB applications

Nirmal, Pratima; Nandgaonkar, Anil; Nalbalwar, Sanjay L.; Gupta, Rajiv

doi:10.1016/j.aeue.2018.12.008

Cited by 25 publications

(6 citation statements)

References 26 publications

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“…Along with the neutralization line, four slits have been etched in the ground (Yang et al., 2016) to reduce MC between the elements of the multiband MIMO antenna working for GSM, DCS, and long term evolution (LTE) indoor applications. Two slots (Addaci et al., 2014), a wide slot and a pair of narrow slots (Nandi & Mohan, 2017) as represented in Figure 9a, six slits (Jaglan et al., 2017, 2018), simple wide slot (Ouyang et al., 2011), a vertical slot along with T‐shaped ground stub (Liu et al., 2015) as represented in Figure 9b, inverted T‐shaped slot along with a capacitor (Park et al., 2012), one T‐shaped slot and two‐stepped slots (Jetti & Nandanavanam, 2018) as described in Figure 10a, a narrow slot (Ren et al., 2014) as represented in Figure 10b, slitted pattern (Chiu et al., 2007), two symmetric stepped “L”‐shaped open ground slots (Biswal & Das, 2018b), T‐shaped slot impedance transformer (Zhang et al., 2012), two λ /4 slots (Zuo et al., 2010), E‐shaped slot on the radiator and narrow ground slot (Bhanumathi & Sivaranjani, 2019), slot line based DGS (Hussain et al., 2019), six pair of slits (Wu & Chu, 2014), n shaped slot etched below the feed‐line (Ul Haq & Koziel, 2018), meandered slot (Ayatollahi et al., 2012), L‐shaped slot (Huang et al., 2015a), series of slits (Li et al., 2009), four slots etched (Ikram et al., 2018), H‐shaped slot (Kang et al., 2016), as represented in Figure 11a, quasi‐cross‐shaped slot (Lu et al., 2011), two T‐slots, and a rectangular slot (Marzudi et al., 2015), as described in Figure 11b, triangular slots and meshed metal strip (Nirmal et al., 2019), again a pair of slits (Sharawi et al., 2012), two λ /2 slots (Sonkki & Salonen, 2010), cross‐shaped slot and a sickle‐shaped metallic strip (Srivastava & Mohan, 2015), two U‐shaped slots (Zhou et al., 2012) as represented in Figure 12a, two asymmetric dumbbells shaped slot, and one decoupling slot (Yang et al., 2018) as depicted in Figure 12b while a P‐shaped slot and two F‐shaped strips (Zhai et al., 2013) have been inserted in the ground p...…”

Section: Isolation Techniques Discussionmentioning

confidence: 99%

A Review on Different Techniques of Mutual Coupling Reduction Between Elements of Any MIMO Antenna. Part 1: DGSs and Parasitic Structures

et al. 2021

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With the advancement in the high data rates wireless transmission, the demand for high channel capacity planar antennas, especially for handheld devices, has shown a significant market. Multiple-Input-Multiple-Output (MIMO) antennas can fulfill the top requirement. MIMO antenna helps in increasing data throughput and link coverage without sacrificing additional bandwidth or increased transmit power (Kumar et al., 2018a, 2018b). The MIMO antenna's other advantages are: high data throughput and link range without additional spectrum requirement, increased transmit power, spatial diversity and pattern diversity, and less signal dropout (Kumar et al., 2019a). In MIMO, multiple antennas radiate simultaneously and act as a transmitter or receiver depending upon its purpose. Multiple antennas placed on a single substrate sharing at least one standard radiating frequency will be considered an MIMO antenna. The MIMO antenna should have a common ground, easing the integration with monolithic integrated circuits (ICs) (Kumar et al., 2020a). However, sometimes the MIMO antenna does not have a common ground plane, but such cases should be avoided for better integration purposes and standard voltage levels. MIMO antenna should be more compact to have a reduced form factor. The MIMO antenna's compactness is another primary concern when multiple antennas are placed on a single substrate. If the antenna element spacing is less than the λ 0 /2, i.e., half of the free-space wavelength, then the antenna suffers from the surface wave and the space wave coupling effect between the antenna elements (Dama et al., 2011). For that reason, as the compactness increases, the chances of MC effect increase, resulting in degradation in the MIMO antenna performance due to power losses in a rich scattering environment. Therefore, an effective isolation technique is a must in the design of a compact MIMO antenna. Besides this, pattern and spatial diversity

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Section: Isolation Techniques Discussionmentioning

confidence: 99%

A Review on Different Techniques of Mutual Coupling Reduction Between Elements of Any MIMO Antenna. Part 1: DGSs and Parasitic Structures

et al. 2021

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“…The use of ultra-broadband technology with MIMO technical arrays can transmit data at high speeds [19]. Because a wide range of wireless applications can benefit from this method's superior diversity gain and network interconnection quality.…”

Section: Introductionmentioning

confidence: 99%

A tapered feed UWB-MIMO antenna with high characteristics based on fractal method

Sediq

2023

Phys. Scr.

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A miniaturized antenna based on fractal method and Tapered-feeder technique for ultra-wideband (UWB) applications is developed in this research. The structure of the component cell monopole antenna is designed by using a half circle-shaped fractal method and merging material implementation with the L-stub shape. These techniques provide a wide impedance bandwidth for the innovative wireless antenna with high characteristics, which operates from 2.73 to 12.21 GHz. The planned module cell dimensions are 20 by 16 square millimetres ( 0.181 λ L × 0.145 λ L ), where the wavelength ( λ L ) is 110 mm. This low-profile antenna has then been employed to design an array of 1 × 2 Multi Input Multi Output (MIMO) antennas with an overall size of 20 ×34 mm 2 . Two symmetric geometries are arranged in the designed miniaturized MIMO system with an inverted T-shaped decoupling copper between them. Measurement results show that the dual antenna with multiple diversity metrics has great characteristics for MIMO applications due to providing low mutual coupling value, lower than 0.33 bits per s./Hz of channel capacity loss, minor envelope correlation coefficient of fewer than 0.005, lower −11 dB of total active reflection coefficient, greater than 9.93 dB of diversity gain and proper mean effective gain (MEG ratio≈1, MEG ≤ 0.5). A high peak gain magnitude of 5.42 dBi is provided at an operating frequency of 10.5 GHz for the recommended single antenna.

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“…Furthermore, its inter-port isolation greatly improves with the introduction of end-loaded line into the ground plane. Table 1 highlights the comparison between the proposed antennas with the existing reported articles [13–19]. Mao et al .…”

Section: Introductionmentioning

confidence: 99%

“…[18] and Nirmal et al . [19] presented compact 2 × 2 UWB-MIMO antenna with enhanced isolation using fractal slots, although their study fulfills the requirement of isolation criteria but their impedance bandwidth is quite lower and also relatively larger footprint than the proposed design. Hence, from the table, one can clearly observe that the proposed antenna is much more simpler and compact which offers much wider impedance bandwidth (3.1 to 16.9 GHz) along with desirable inter-port isolation.…”

Section: Introductionmentioning

confidence: 99%

A compact dual-polarized co-radiator MIMO antenna for UWB applications

Kaur

Singh

Upadhyay

2021

Int. J. Microw. Wireless Technol.

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In this research study, a compact dual-polarized co-radiator ultra-wideband (UWB) multiple-input multiple-output (MIMO) antenna with improved impedance bandwidth and isolation is proposed for wireless applications. The designed co-radiator has an overall area of 0.3λo × 0.3λo mm2 (where, λo is free space wavelength corresponding to the lower cut-off frequency, i.e., 3.1 GHz). The proposed resonator comprises of a hybrid geometry which is created with the combinations of a circular-shaped patch, a square, and two rectangular stubs. It is centrally aligned between two 50 Ω micro-strip feed lines that are positioned orthogonal to each other. Further, the modified ground plane is attached with the end-loaded line which provides broadband isolation over entire UWB frequency band. The simulated results of the proposed antenna exhibit wideband characteristics with impedance bandwidth of 3.1–16.9 GHz with minimum isolation of −15 dB. Moreover, all the radiation performance parameters are analyzed and discussed. Some important diversity parameters such as envelope correlation coefficient, mean effective gain, effective diversity gain, and channel capacity loss have also been evaluated. Furthermore, all the measured results of proposed antenna agree well with the simulated results which make the proposed antenna a suitable candidate for UWB-MIMO wireless applications.

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Compact wideband MIMO antenna for 4G WI-MAX, WLAN and UWB applications

Cited by 25 publications

References 26 publications

A Review on Different Techniques of Mutual Coupling Reduction Between Elements of Any MIMO Antenna. Part 1: DGSs and Parasitic Structures

A Review on Different Techniques of Mutual Coupling Reduction Between Elements of Any MIMO Antenna. Part 1: DGSs and Parasitic Structures

A tapered feed UWB-MIMO antenna with high characteristics based on fractal method

A compact dual-polarized co-radiator MIMO antenna for UWB applications

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