Broadband Two-Element Array With Hybrid Decoupling Structures for Multimode Mobile Terminals

Sun, Qiao; Sun, Baohua; Sun, Ling Ling; Huang, Wei; Ren, Qiannan

doi:10.1109/lawp.2014.2379937

Cited by 21 publications

(16 citation statements)

References 7 publications

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“…The comparison takes into consideration the total substrate dimensions and the volume of the handset, frequency range, bandwidth, maximum coupling between antennas, envelope correlation coefficient, gain and radiation efficiency, as shown in Table 3. From Table 3, it can be noticed that the volume of the proposed MIMO antenna system is slightly larger than the MIMO antennas reported in [18,[21][22][23], but smaller than the volume of the six other ones. The bandwidth of the proposed MIMO Meandered-Line PIFA antenna is much better than most of the reported MIMO antennas.…”

Section: Comparison With Published Workmentioning

confidence: 79%

Compact High Isolation Meandered-Line Pifa Antenna for Lte (Band-Class-13) Handset Applications

Naser¹,

Sayidmarie²,

Aziz³

2016

PIER C

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MIMO systems have become an essential part in many communications networks and Long Term Evolution (4G) mobile communication systems. Mobile handsets using lower band of LTE (LTE-700 band) require antennas of reduced size that can be adapted to the limited space in the handset. This paper presents the design, optimization and implementation of two meandered-line PIFA antennas working as an MIMO system with high isolation for LTE-700 band mobile applications. To solve the problem of mutual coupling, a combination of decoupling arrangements was used to improve the isolation between the two antennas. The influences of various design parameters are investigated using the CST Microwave Studio Suite. A prototype of the proposed Meandered-line PIFA Antenna was fabricated and tested using vector network analyzer. Good agreement was found between the simulated and measured results. The fabricated MIMO antenna shows an isolation better than 12 dB and a −6 dB bandwidth of (75 MHz) in the frequency range from (720 MHz) to (795 MHz). The antenna has 1.94 dB gain, total efficiency of 85%, and volume of 110 × 65 × 1.6 mm 3 , that is (0.275 × 0.1625 × 0.004) in wavelengths.

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Section: Comparison With Published Workmentioning

confidence: 79%

Compact High Isolation Meandered-Line Pifa Antenna for Lte (Band-Class-13) Handset Applications

Naser¹,

Sayidmarie²,

Aziz³

2016

PIER C

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“…In recent years, several decoupling techniques have been proposed to optimize isolation for the MIMO system, such as the neutralization line (NL) technique [2], etching slot method [3], [4], ground branch decoupling method [5]- [7], metamaterial structures [8], and decoupling networks [9]. In [2], a 2 × 2 MIMO system was proposed for smartphone applications, and its measured S 21 was lower than −10 dB within the operating bands when adding two crossed neutralization lines.…”

Section: Introductionmentioning

confidence: 99%

“…In [3], four slots were etched on the ground to improve the isolation between the antenna elements and this achieved measured S 21 values lower than −15 dB within the entire band. A decoupled structure composed of lumped elements and three U-shaped slots was proposed in [4], and the measured isolation between two antenna elements was better than 11 dB. In [5], low mutual coupling was obtained over two operating bands by using a folded dual inverted L-shaped ground branch.…”

Section: Introductionmentioning

confidence: 99%

Design of a Twelve-Port MIMO Antenna System for Multi-Mode 4G/5G Smartphone Applications Based on Characteristic Mode Analysis

Dong

Wang

2020

IEEE Access

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This paper presents a twelve-port multiple-input multiple-output (MIMO) antenna system for multi-mode 4G/5G smartphone applications. Characteristic mode analysis (CMA) is used to illustrate the operation principle and optimize the geometrical structure of the antenna system. The proposed MIMO antenna system consists of a 4G antenna module and a 5G antenna module. The 4G antenna module is a 2 × 2 MIMO antenna array capable of covering the LTE700/2500/3400, GSM850/900, DCS, PCS, UTMS, 2.4-GHz WLAN, and 3.5-GHz WiMAX, which consists of two symmetrical antenna elements, and uses protruded ground to improve the isolation between the two adjacent 4G module antenna elements. The 5G antenna module is a 10×10 MIMO antenna array composed of ten identical monopole antennas and operates at the bands of 3.31 ∼ 3.70 GHz and 4.46 ∼ 5.40 GHz, covering the 3.5-GHz band (3.4 ∼ 3.6 GHz) and 4.9-GHz band (4.8 ∼ 5.0GHz) for 5G applications. The proposed antenna is fabricated, and the experimental results agree with the simulated results well. The calculated envelope coefficient correlation is lower than 0.5, indicating that the diversity performance meets the need of the MIMO antenna system. All the features make the antenna suitable for multi-mode 4G/5G smartphone applications. INDEX TERMS MIMO antenna, decoupling, 5G antenna, characteristic mode, smartphone applications.

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“…Nevertheless, it is more challenging to deploy this technology in mobile handsets because the volume constraints result in severe mutual coupling [4,5]. The latest studies into MIMO handset antennas have tended to concentrate on frequency bands above 1 GHz [6,7,8,9,10], where it is easier to achieve effective decoupling compared with the situation in the frequency bands below 1 GHz. A key reason for this is that the wavelength is longer at lower frequencies and so radiating elements must be separated by larger distances in order to preserve the same electrical separation distance.…”

Section: Introductionmentioning

confidence: 99%

A reconfigurable MIMO handset antenna employing liquid metal

Gao

Kelly

Zhang

et al. 2019

IEICE Electron. Express

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This paper presents a reconfigurable MIMO handset antenna based on liquid metal. The antenna covers the eight frequency bands of the LTE-A standard. This antenna comprises: a monopole element, a IFA element, and a dual-purpose L-shaped branch which is connected to the ground plane. The function of the L-shaped branch is to improve the isolation, within the low frequency band (698-960 MHz), between two elements. A strip of liquid metal which connects to the arm of the IFA, coordinated with the L-shaped branch, can be used to alter its resonant frequency. The operating principle of this strip is analysed using an equivalent capacitor model. The theory of characteristic mode is used to analyze the properties of proposed antenna. To validate the concept, a prototype antenna with size of 120 × 60 × 0.8 mm 3 was fabricated and measured.

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Broadband Two-Element Array With Hybrid Decoupling Structures for Multimode Mobile Terminals

Cited by 21 publications

References 7 publications

Compact High Isolation Meandered-Line Pifa Antenna for Lte (Band-Class-13) Handset Applications

Compact High Isolation Meandered-Line Pifa Antenna for Lte (Band-Class-13) Handset Applications

Design of a Twelve-Port MIMO Antenna System for Multi-Mode 4G/5G Smartphone Applications Based on Characteristic Mode Analysis

A reconfigurable MIMO handset antenna employing liquid metal

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