A Miniaturized Extremely Close-Spaced Four-Element Dual-Band MIMO Antenna System With Polarization and Pattern Diversity

Boukarkar, Abdelheq; Lin, Xian Qi; Jiang, Yuan; Nie, Li Ying; Mei, Peng; Yu, Yi

doi:10.1109/lawp.2017.2777839

Cited by 101 publications

(82 citation statements)

References 10 publications

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“…To do the measurement, one port is only fed and the radiation pattern is then tested. [20][21][22][23] Comparable co-and cross-polarization components are obtained at both E-and H-planes. This feature is beneficial for handheld/portable MIMO devices, as the position of them is nonpredictable in practical applications.…”

Section: Enz-loaded Array Of Microstrip Patch Antennasmentioning

confidence: 94%

“…As the size of the antenna element (33.5 × 50 mm) at the lower resonance frequency is about 1.17λ, as expected the radiation patterns are similar to an equivalent microstrip patch, and the half‐space radiation pattern is achieved. To do the measurement, one port is only fed and the radiation pattern is then tested . Comparable co‐ and cross‐polarization components are obtained at both E‐ and H‐planes.…”

Section: Enz‐loaded Array Of Microstrip Patch Antennasmentioning

confidence: 99%

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A broadband array antenna using epsilon-near-zero metamaterials for MIMO applications

Mazaheri

Jafargholi

2018

Int J RF Microw Comput Aided Eng

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In this article, the capability of epsilon‐near‐zero (ENZ) metamaterial (MTM) to reduce mutual coupling between densely packed array elements is examined. The results show a reduction in mutual coupling between antenna elements and provide a possible way to reduce the element separation. To verify and confirm the simulation results, a prototype of the proposed ENZ structure incorporating an array of closely implemented patch antennas, 0.12λ L, are fabricated and tested. The array antenna has an overall dimension of approximately 2.66λ L × 1.75λ L × 0.05λ L while achieving an average gain and efficiency of 7 dB and 85%, respectively. Measurement shows that the mutual coupling is mostly better than −20 dB across a broad bandwidth of >2.6:1 (10.5–27.7 GHz).

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Section: Enz-loaded Array Of Microstrip Patch Antennasmentioning

confidence: 94%

Section: Enz‐loaded Array Of Microstrip Patch Antennasmentioning

confidence: 99%

A broadband array antenna using epsilon-near-zero metamaterials for MIMO applications

Mazaheri

Jafargholi

2018

Int J RF Microw Comput Aided Eng

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“…4,5 Recently, several MIMO antenna designs have been reported in the literature for dual-band WLAN applications [6][7][8][9][10][11][12][13][14][15][16][17][18][19] and some have been reported for dual-band WiMAX applications. 17,[20][21][22][23][24] In these reported papers, some of the designs have nonplanar structure 15,17,18,24 and are not suitable for compact planar portable devices. Only a few dual-band MIMO antenna designs are feasible to deploy in compact USB dongle.…”

Section: Introductionmentioning

confidence: 99%

Compact planar frequency reconfigurable multiple‐input‐multiple‐output antenna with pattern and polarization diversity characteristics for WiFi and WiMAX standards

Sipal

Abegaonkar

Koul

2020

Int J RF Microw Comput Aided Eng

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A compact planar frequency reconfigurable dual‐band multiple‐input‐multiple‐output (MIMO) antenna with high isolation and pattern/polarization diversity characteristics is presented in this article for WiFi and WiMAX standards. The MIMO configuration incorporates two symmetrically placed identical antenna elements and covers overall size of 24 mm × 24 mm × 0.762 mm. Reconfiguration of each antenna element is achieved by using a PIN diode which allows antennas to switch from state‐1 (2.3‐2.4 GHz and 4.6‐5.5 GHz) to state‐2 (3.3‐3.5 GHz and 4.6‐5.5 GHz). In state‐1, the configuration offers isolation ≥18 dB and 20 dB in lower band (LB) and upper band (UB) respectively; whereas, in state‐2, isolation ≥21 dB and 20 dB in LB and UB respectively is achieved. The same decoupling circuit provides high isolation in dual‐band of two states, which makes overall size of the proposed design further compact. The antennas are characterized in terms of envelope correlation coefficient, radiation pattern, gain, and efficiency. From measured and simulated results, it is verified that the proposed frequency reconfigurable dual‐band multi‐standard MIMO antenna design shows desirable performance in both operating bands of each state and compact size of the design makes it suitable for small form factor devices used in future wireless communication systems.

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“…Polarization diversity antennas, where antennas with different polarization (linear/circular) are utilized to achieve low far‐field correlation, are also proposed that do not require any decoupling structure, however, such designs do not offer high antenna packing density . To increase the antenna elements packing density with high isolation, a novel cross shaped metal strips of height 0.023λ o shorted to ground plane using metal via is reported, nevertheless the total height of the design is increased by 2 mm (0.023λ o ) due to presence of metallic wall . Various bandstop resonators‐based decoupling unit designs that used to occupy less space when compared to CSRR structures and utilize a single standard substrate are reported that helped in the edge‐to‐edge spacing between the radiating elements.…”

Section: Introductionmentioning

confidence: 99%

“…14 To increase the antenna elements packing density with high isolation, a novel cross shaped metal strips of height 0.023λ o shorted to ground plane using metal via is reported, nevertheless the total height of the design is increased by 2 mm (0.023λ o ) due to presence of metallic wall. 15 Various bandstop resonatorsbased decoupling unit designs that used to occupy less space when compared to CSRR structures and utilize a single standard substrate are reported that helped in the edge-to-edge spacing between the radiating elements. These can increase the packing density of the radiators in the antenna aperture, thus resulting in antenna array miniaturization.…”

Section: Introductionmentioning

confidence: 99%

Reduced edge‐to‐edge spaced MIMO antenna using parallel coupled line resonator for WLAN applications

Mark

Singh

Mandal

et al. 2019

Micro & Optical Tech Letters

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In this paper, a pair of parasitic parallel coupled line resonators (PCLR) is printed between the two patches that reduce the mutual coupling in multiple‐input‐multiple‐output (MIMO) antenna system. The proposed design offers reduced edge‐to‐edge spacing of 3.5 mm (0.066λo, λo is the free space wavelength) at 5.7 GHz. The proposed decoupling structure of length 0.49λo and area 0.05λo × 0.49λo consists of a pair of parallel coupled lines, placed between the antenna elements and provides a band stop properties over the desired operating band that helps to eradicate the near coupled field. The PCLR decoupling structure helps to improve the isolation and bandwidth by 16 dB and 0.22 GHz, respectively, at the resonating frequency without any change in radiation characteristics of the MIMO system. Moreover, the antenna system yields a good broadside gain of 6.43 dBi, efficiency 70–85%, with acceptable channel diversity performances over the entire operating band (5.47–5.9 GHz). Good agreements between the simulated and measured results make the proposed design approach suitable for a closely packed MIMO system.

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A Miniaturized Extremely Close-Spaced Four-Element Dual-Band MIMO Antenna System With Polarization and Pattern Diversity

Cited by 101 publications

References 10 publications

A broadband array antenna using epsilon-near-zero metamaterials for MIMO applications

A broadband array antenna using epsilon-near-zero metamaterials for MIMO applications

Compact planar frequency reconfigurable multiple‐input‐multiple‐output antenna with pattern and polarization diversity characteristics for WiFi and WiMAX standards

Reduced edge‐to‐edge spaced MIMO antenna using parallel coupled line resonator for WLAN applications

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