Mobile-Phone Antenna Array with Diamond-Ring Slot Elements for 5G Massive MIMO Systems

Parchin, Naser Ojaroudi; Basherlou, Haleh Jahanbakhsh; Alibakhshikenari, Mohammad; Parchin, Yasser Ojaroudi; Al‐Yasir, Yasir I. A.; Abd‐Alhameed, Raed A.; Limiti, Ernesto

doi:10.3390/electronics8050521

Cited by 74 publications

(49 citation statements)

References 34 publications

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“…MEG i = 0.5 µ irad = 0.5 1 − K j=1 S ij (11) In this equation, K is the number of antennas, i represents antenna under observation, and µ irad is the radiation efficiency. For good diversity performance, the practical standard followed is that MEG should be −3 ≤ MEG (dB) < −12, which is therefore validated for the obtained MEG values of all MIMO antennas of the proposed design.…”

Section: Mean Effective Gain(meg)mentioning

confidence: 99%

4-Port MIMO Antenna with Defected Ground Structure for 5G Millimeter Wave Applications

et al. 2020

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We present a 4-port Multiple-Input-Multiple-Output (MIMO) antenna array operating in the mm-wave band for 5G applications. An identical two-element array excited by the feed network based on a T-junction power combiner/divider is introduced in the reported paper. The array elements are rectangular-shaped slotted patch antennas, while the ground plane is made defected with rectangular, circular, and a zigzag-shaped slotted structure to enhance the radiation characteristics of the antenna. To validate the performance, the MIMO structure is fabricated and measured. The simulated and measured results are in good coherence. The proposed structure can operate in a 25.5–29.6 GHz frequency band supporting the impending mm-wave 5G applications. Moreover, the peak gain attained for the operating frequency band is 8.3 dBi. Additionally, to obtain high isolation between antenna elements, the polarization diversity is employed between the adjacent radiators, resulting in a low Envelope Correlation Coefficient (ECC). Other MIMO performance metrics such as the Channel Capacity Loss (CCL), Mean Effective Gain (MEG), and Diversity gain (DG) of the proposed structure are analyzed, and the results indicate the suitability of the design as a potential contender for imminent mm-wave 5G MIMO applications.

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Section: Mean Effective Gain(meg)mentioning

confidence: 99%

4-Port MIMO Antenna with Defected Ground Structure for 5G Millimeter Wave Applications

et al. 2020

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“…As can be observed from Figure 15 a,b, the sample smartphone antenna prototype offers good quasi-omnidirectional radiation patterns with an acceptable agreement between simulations and measurements [38][39][40]. Table 2 provides a comparison between the presented smartphone array antenna and another reported smartphone array [11][12][13][14][15][16][17][18][19][20][21][22][23][24][25]. As can be observed, compared with the recently proposed 5G MIMO smartphone antennas with planar and uniplanar structures, our antenna performs better in terms of impedance match and bandwidth, and its clearance size remains at a satisfactory level, as shown in Table 2.…”

Section: Mobile-phone Antenna Designmentioning

confidence: 99%

“…Several kinds of 5G MIMO smartphone antennas have been put forward recently [11][12][13][14][15][16][17][18][19][20][21][22][23][24][25] (see Table 2 for details). However, these MIMO antenna designs either suffer from a narrow frequency bandwidth or occupy a huge space on a smartphone mainboard.…”

Section: Introductionmentioning

confidence: 99%

A New CPW-Fed Diversity Antenna for MIMO 5G Smartphones

et al. 2020

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In this study, a new coplanar waveguide (CPW)-fed diversity antenna design is introduced for multiple-input–multiple-output (MIMO) smartphone applications. The diversity antenna is composed of a double-fed CPW-fed antenna with a pair of modified T-ring radiators. The antenna is designed to cover the frequency spectrum of commercial sub-6 GHz 5G communication (3.4–3.8 and 3.8–4.2 GHz). It also provides high isolation, better than −16 dB, without an additional decoupling structure. It offers good potential to be deployed in future smartphones. Therefore, the characteristics and performance of an 8-port 5G smartphone antenna were investigated using four pairs of the proposed diversity antennas. Due to the compact size and also the placement of the elements, the presented CPW-fed smartphone antenna array design occupies a very small part of the smartphone board. Its operation band spans from 3.4 to 4.4 GHz. The simulated results agree well with measured results, and the performance of the smartphone antenna design in the presence of a user is given in this paper as well. The proposed MIMO design provides not only sufficient radiation coverage supporting different sides of the mainboard but also polarization diversity.

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“…24 shows the fabricated prototype and the measured S nn /S mn results. As can be observed, unlike the antenna design in [42], the proposed MIMO smartphone antenna is capable to exhibit good multi-band characteristic with sufficient mutual-coupling (<−10 dB) at 3.6, 5.5 and 6.6 GHz.…”

Section: Dual-band/multi-band Characteristic Of the Proposed Ring-slomentioning

confidence: 92%

Orthogonally dual‐polarised MIMO antenna array with pattern diversity for use in 5G smartphones

Parchin

Al‐Yasir

Basherlou

et al. 2020

IET Microwaves, Antennas & Propagation

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A new multiple‐input/multiple‐output (MIMO) antenna design is introduced for future smartphones. The proposed design contains four pairs of double‐fed circular‐ring resonators located at different edges of the smartphone printed circuit board (PCB) with an FR‐4 substrate and a dimension of 75 × 150 mm2. The antenna elements are fed by 50‐Ohm microstrip‐lines and provide polarisation and radiation pattern diversity function due to the orthogonal placement of their feed lines. By inserting a rectangular slot under each microstrip feed‐line, the mutual coupling characteristic of the antenna ports is reduced. A good frequency bandwidth (S11 ≤ − 10 dB) of 3.3–3.9 GHz has been obtained for the smartphone antenna array. Nevertheless, for S11 ≤ − 6 dB, this value is 3.1–4.3 GHz. More than 3 dB realised gain and 80% total efficiency are achieved for the single‐element radiator. The design provides not only sufficient radiation coverage supporting different sides of the mainboard but also the polarisation diversity. In addition, sufficient properties are obtained in the vicinity of human‐hand/human‐head. The proposed MIMO antenna design is also capable to generate dual‐ or multi‐band function. Moreover, a new and compact phased array millimeter‐wave (mm‐wave) antenna design with end‐fire radiation beams is introduced which can be easily integrated into smartphones.

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Mobile-Phone Antenna Array with Diamond-Ring Slot Elements for 5G Massive MIMO Systems

Cited by 74 publications

References 34 publications

4-Port MIMO Antenna with Defected Ground Structure for 5G Millimeter Wave Applications

4-Port MIMO Antenna with Defected Ground Structure for 5G Millimeter Wave Applications

A New CPW-Fed Diversity Antenna for MIMO 5G Smartphones

Orthogonally dual‐polarised MIMO antenna array with pattern diversity for use in 5G smartphones

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