An Envelope Correlation Formula for<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mo>(</mml:mo><mml:mi>N</mml:mi><mml:mo>,</mml:mo><mml:mi>N</mml:mi><mml:mo>)</mml:mo></mml:math>MIMO Antenna Arrays Using Input Scattering Parameters, and Including Power Losses

Dama, Y. A. S.; Abd-Alhameed, R. A.; Jones, S. M. R.; Zhou, Dawei; McEwan, N.J.; Child, M. B.; Excell, Peter S.

doi:10.1155/2011/421691

Cited by 29 publications

(14 citation statements)

References 21 publications

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“…Envelope correlation coefficient ρ e is an important figure of merit which is used to evaluate the overall diversity performance of MIMO antennas. It can be determined by many approaches such as full sphere complex radiation pattern, impedance matrix, Clarke's formula and S parameters . Among those, the quicker approach based on S parameters as in Ref.…”

Section: Mimo Antenna Design and Resultsmentioning

confidence: 99%

Multi‐band CPW fed MIMO antenna for bluetooth, WLAN, and WiMAX applications

Desde

Bozdağ

Kustepeli

2016

Micro & Optical Tech Letters

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In this letter, multi-band coplanar waveguide (CPW) fed multiple-input-multiple-output (MIMO) antenna is presented for Bluetooth, WLAN and WiMAX applications. The elements of MIMO antenna are identical CPW-fed printed monopole antennas whose bandwidth performances are improved by employing inverse U and meander line slots. In the design of the antennas, a low-cost FR4 substrate is used and the size of the element antennas are optimized as 35 mm x 30 mm. According to the measurements, S 11 is below 210 dB in 2.38 GHz -2.52 GHz and 3.19 GHz -6.44 GHz bands with 0.2 dB and 2.9 dB average peak realized gains, respectively. The element antennas are placed orthogonally and fed independently to obtain MIMO structure whose size is optimized as 42 mm x 62 mm. The performance of MIMO antenna is also examined in terms of diversity parameters such as envelope correlation coefficient and apparent diversity gain, which are lower than 0.02 and higher than 9.9 in the operating bands, respectively.

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Section: Mimo Antenna Design and Resultsmentioning

confidence: 99%

Multi‐band CPW fed MIMO antenna for bluetooth, WLAN, and WiMAX applications

Desde

Bozdağ

Kustepeli

2016

Micro & Optical Tech Letters

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“…0 separation. An enhancement of more than dB 10 is achieved compared to the conventional MIMO systems which shows an isolation of about dB 20 for half wavelength separation between array elements [9].…”

Section: Discussionmentioning

confidence: 95%

Parasitic elements based decoupling technique for monopole four square array antenna

Salama

Solbach

2014

2014 9th European Microwave Integrated Circuit Conference

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An alternative approach to port decoupling for the monopole four square array antenna is proposed. In contrast to the decoupling of the monopole four square array antenna based on eigenmodes theory, port decoupling over wider frequency band is obtained by a proper choice of parasitic elements dimensions and positions for a given array elements spacing without extending the overall area. The decoupled ports of the array may then be matched by using conventional matching circuits.

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“…Moreover, the parameter variation of the FR4 substrate and the imperfection in fabrication could also be part of the reasons for the discrepancies. Besides isolation, the ECC is another important parameter to present for a MIMO antenna system [16]. Generally speaking, ECC < 0.5 is a criterion suitable for practical applications [17].…”

Section: A Mimo Antenna System Structurementioning

confidence: 99%

Compact Sub-6-GHz Four-Element MIMO Slot Antenna System for 5G Tablet Devices

et al. 2020

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A sub-6-GHz four-element multi-input multi-output (MIMO) slot antenna system was proposed in this study for fifth-generation (5G) tablet computers, where each antenna element was constructed using a slot structure. To effectively use the available space in a tablet and maximize the screen, we have deployed the MIMO antenna system on the left side-edge frame of the tablet. The MIMO antenna system measuring 37.2 × 7 mm 2 consists of two identical 13.6 × 7 mm 2 dual-slot-antenna units that are separated by 10 mm. The two closely spaced slot antennas in the same dual-slot-antenna unit are arranged asymmetrically mirrored of each other with respect to the system ground plane. Although the dual-slotantenna unit is very compact, the isolation between the two slot antennas in the same unit can be enhanced by using an ungrounded full-wavelength strip resonator. With the two ungrounded resonators in the MIMO slot antenna system, the simulated intra-unit isolations at the mid-band frequency can be enhanced by about 3.5 dB to meet the design requirement. As a byproduct, the two ungrounded resonators in the MIMO antenna system can also enhance the simulated mid-band antenna efficiency by about 4.5% and lower the worst simulated ECC by 0.195, from 0.518 to 0.323. This MIMO antenna system can support the frequency band of 3400-3600 MHz for 5G. In the operating band, the measured isolation is larger than 11 dB, and the measured antenna efficiency is larger than 40%. The envelope correlation coefficients (ECCs) calculated from the measured complex E-field radiation patterns are all smaller than 0.23, making the proposed design suitable for 5G mobile communications that require fast transmission. INDEX TERMS Tablet antennas, multi-input multi-output (MIMO) antennas, slot antennas, miniaturized antennas, 5G MIMO antenna system, envelope correlation coefficient (ECC).

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An Envelope Correlation Formula for(N,N)MIMO Antenna Arrays Using Input Scattering Parameters, and Including Power Losses

Cited by 29 publications

References 21 publications

Multi‐band CPW fed MIMO antenna for bluetooth, WLAN, and WiMAX applications

Multi‐band CPW fed MIMO antenna for bluetooth, WLAN, and WiMAX applications

Parasitic elements based decoupling technique for monopole four square array antenna

Compact Sub-6-GHz Four-Element MIMO Slot Antenna System for 5G Tablet Devices

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