Modified circular common element four-port multiple-input-multiple-output antenna using diagonal parasitic element

Chouhan, Sanjay; Panda, Debendra Kumar; Kushwah, Vivek Singh

doi:10.1002/mmce.21527

Cited by 24 publications

(11 citation statements)

References 32 publications

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“…The comparison of the proposed shared radiator with the existing shared radiators is given in Table 4. The proposed shared radiator has the best results for four ports in comparison with the references [20–22] and [27]. The operating bandwidth and TARC bandwidth both are very high in the proposed design.…”

Section: Resultsmentioning

confidence: 79%

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Multi-cut four-port shared radiator with stepped ground and diversity effects for WLAN application

Malviya¹,

Chouhan

2019

Int. J. Microw. Wireless Technol.

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A four-port shared radiator is proposed for 5.2 GHz wireless application using multiple-cut rectangular geometry and partially stepped ground. The difficulty in making the shared radiator structure is almost removed in the presented design, and without the help of any isolating structure, sufficient value of isolation is achieved. The proposed shared geometry produces isolation of >10 dB in the 4.96–5.5 GHz operating frequency band. The gain of the MIMO antenna varies from 2.4 to 5.5 dBi, and radiation efficiency is >63% in the proposed band. The ports are arranged in an orthogonal manner to reduce the mutual coupling. An envelope correlation coefficient is <0.03 in the proposed antenna band. The total active reflection coefficient bandwidth of the antenna is 500 MHz with best combination of input excitation angles of 90, 180°. The isolation in the proposed shared radiator is enhanced by creating multiple cuts and stepped ground. To check the suitability of antenna for indoor and outdoor environments the mean effective gain and specific absorption rate results are also presented in the paper and it found under the required safety norms as per the international telecommunication union for uniform and Gaussian environments.

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Section: Resultsmentioning

confidence: 79%

“…The miniaturization in MIMO antenna can also be achieved by the shared radiator with multi-port arrangement [20]. Only countable shared radiators are available due to difficulty in isolation among connected ports.…”

Section: Introductionmentioning

confidence: 99%

Multi-cut four-port shared radiator with stepped ground and diversity effects for WLAN application

Malviya¹,

Chouhan

2019

Int. J. Microw. Wireless Technol.

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“…A central metallic reflector has been placed in the center of two groups of four‐elements of dielectric resonator antennas (DRAs) (Sharawi et al., 2017), as represented in Figure 16b for isolation and tilting the radiation pattern of one group resonating at 5.8 GHz by 45° as compared to another group resonating at 2.45 GHz. Similarly, a simple metallic strip (Roshna et al., 2015), T‐shaped parasitic strip (Kang et al., 2015), a modified interdigital capacitor (Kumar et al., 2018b), a novel ITI‐shaped parasitic structure (Kumar et al., 2019a), parasitic inverted L‐element with an open stub (Lee et al., 2012), H‐shaped strip (Li et al., 2016), floating parasitic decoupling structure (Khan et al., 2014), a rotated “+” shaped rectangular strip pair (Singhal, 2019) as represented in Figure 17a, a rectangular parasitic element is embedded at the substrate backside (Hatami et al., 2019), two separate rectangular shapes and T‐shaped parasitic elements (Faraz et al., 2019), as represented in Figure 17b, cross‐shaped metallic fence (Caizzone, 2017), stepped cross‐shaped reflector strip (Thummaluru et al., 2019), a circular parasitic element at the backside of the radiating patch (Ghimire et al., 2019), a novel reversed S‐shaped walls (Wang et al., 2019), a decoupling metal strip loaded with an inductor (Nie et al., 2019), an optimized parasitic element (Addaci et al., 2012) as represented in Figure 18a, slotted meander‐line resonator (SMLR) (Alsath et al., 2013) as represented in Figure 18b, a simple rectangular parasitic structure at the back (Azarm et al., 2019), diagonal parasitic strip at the back (Chouhan et al., 2019), Minkowski fractal‐shaped isolators (Debnath et al., 2018) as represented in Figure 19a, a complementary pattern (CP) comprised of meandered transmission lines (Hwang et al., 2010), a group of six parasitic elements (Min et al., 2005), as represented in Figure 19b, two parallel strips, or a single strip embedded with patterned meander‐shaped slot (Isaac et al., 2018) as represented in Figures 20a and 20b, two parasitic monopole providing a decoupling path (Li et al., 2012) as represented in Figure 21a, a novel H‐shape parasitic element embedded in the ground plane (Liu et al., 2018) as represented in Figure 21b, a T‐shaped coupling eleme...…”

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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“…The available designs achieve miniaturization with the use of shared radiator and multi‐port arrangement . The physically connected ports create a big challenge to isolate antenna ports.…”

Section: Introductionmentioning

confidence: 99%

Four‐port shared rectangular radiator with defected ground for wireless application

Chouhan

Malviya²

2020

Int J Communication

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In this research work, a modified shared rectangular radiator is proposed for 5.7-GHz wireless application using multiple cuts and partially stepped ground. The shared design requires no isolating structure to decouple the ports. The proposed shared geometry produces >13 dB isolation in the 4.4-to 6.4-GHz operating band. The gain varies from 3.0 to 6.2 dBi, and radiation efficiency is >70 % in the band. The mutual coupling among the port is reduced by orthogonal arrangement of ports, and envelope correlation coefficient (ECC) is <0.04 in the presented band. Apart from this, isolation in the proposed shared radiator is enhanced by additional multiple cuts with stepped ground. The indooroutdoor suitability of multiple input multiple output (MIMO) antenna for isotropic and Gaussian medium is checked by mean effective gain (MEG) and specific absorption rate (SAR). The presented results of MEG and SAR fulfill the required safety norms as per the ITU for different environments. K E Y W O R D SECC, MEG, MIMO antenna, isolation, SAR, TARC

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Modified circular common element four-port multiple-input-multiple-output antenna using diagonal parasitic element

Cited by 24 publications

References 32 publications

Multi-cut four-port shared radiator with stepped ground and diversity effects for WLAN application

Multi-cut four-port shared radiator with stepped ground and diversity effects for WLAN application

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

Four‐port shared rectangular radiator with defected ground for wireless application

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