Dual-band MIMO antenna using polarization diversity for 4G mobile handset application

In order to improve the channel capacity of communication equipment and reduce the size of antenna, an asymmetric coplanar strip (ACS) fed four-element UWB MIMO antenna with dual band notches is proposed in this paper. The antenna has a simple structure and a compact size of 37×37 mm². The antenna consists of four modifled staircase-shaped radiation elements and four floor on the same side. The antenna elements are placed vertically without additional decoupling structure, and the isolation less than -15 dB in the working bandwidth of 2.9-10.6 GHz can be obtained by using polarization diversity. In addition, the antenna has the notched characteristic of WiMAX and WLAN band. The antenna has good gain and low envelop correlation coefficient (ECC), and the simulation results agree with the measured results, which indicates that the antenna is suitable for UWB system.

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A new two-element MIMO antenna system for cognitive radio applications

Circuit World ◽

10.1108/cw-06-2020-0101 ◽

2021 ◽

Vol ahead-of-print (ahead-of-print) ◽

Author(s):

D. Srikar ◽

Sundru Anuradha

Keyword(s):

Cognitive Radio ◽

Design Methodology ◽

Antenna System ◽

Utilization Efficiency ◽

Dual Band ◽

Polarization Diversity ◽

Spectrum Utilization ◽

Content Type ◽

Mimo Antenna ◽

Dual Band Antennas

Purpose This study aims to propose a two-element multi-input-multi-output (MIMO) antenna for cognitive radio MIMO applications to avoid the complexities involved in reconfigurable antennas and improve the spectrum utilization efficiency. Design/methodology/approach The proposed MIMO antenna system comprises a wideband antenna that operates at 2 GHz–12 GHz for sensing the spectrum and four pairs of antennas for communication, which are single and dual-band antennas. Each pair of antennas meant for communication consists of two similar antennas. Moreover, the antennas meant for communication cover 93% of the bandwidth of the sensing antenna. Findings The first pair of antennas accessible at ports P2 and P6 and the second pair of antennas accessible at ports P4 and P8, which are dual-band antennas, operate at 3.05 GHz–3.85 GHz, 5.8 GHz–8 GHz and 2.05 GHz–2.55 GHz, 4.7 GHz–6.1 GHz, respectively. While the third pair of antennas accessible at ports P3 and P7 and the fourth pair of antennas accessible at ports P5 and P9 are single-band antennas and operate at 3.85 GHz–4.7 GHz and 8 GHz–11 GHz, respectively. Minimum isolations of 20 dB and 15 dB are attained between every two similar antennas for communication and between the sensing antenna and the antennas meant for communication, respectively. The correctness of the proposed antenna is verified with a fine match between the results obtained from simulations and measurements. Originality/value The proposed MIMO antenna possesses salient features, such as polarization diversity and performing a maximum of four communication tasks when all the white spaces are detected.

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Dual‐band CPW fed MIMO antenna with polarization diversity and improved gain

International Journal of RF and Microwave Computer-Aided Engineering ◽

10.1002/mmce.22128 ◽

2020 ◽

Vol 30 (4) ◽

Author(s):

Sk Nurul Islam ◽

Santanu Das

Keyword(s):

Dual Band ◽

Polarization Diversity ◽

Mimo Antenna

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2 × 2 MIMO Asymmetric U-Shaped Nonuniform Slot Antenna for the 4G LTE Metal-Housing Mobile Handsets

International Journal of Antennas and Propagation ◽

10.1155/2019/2424050 ◽

2019 ◽

Vol 2019 ◽

pp. 1-9

Author(s):

I-Fong Chen ◽

Chia-Mei Peng ◽

Jing-Jing Bao ◽

Chia-Ching Chen

Keyword(s):

Correlation Coefficient ◽

Slot Antenna ◽

Impedance Bandwidth ◽

Polarization Diversity ◽

Mimo Antenna ◽

Operating Band ◽

Term Evolution ◽

4G Lte ◽

Mobile Handset

A 2 × 2 MIMO antenna for metal-housing mobile handset application is proposed in this article. The polarization diversity is used to arrange the two antennas’ setup. The asymmetric U-shaped nonuniform slot antenna provides two different resonant bands are designed to be operated in long term evolution (LTE) covers lower band (698 MHz to 960 MHz) and upper band (1710 MHz to 2700 MHz). The modified type III balun is used for upper-operating band, and the open stub is used for lower-operating band, good impedance bandwidth, and radiated pattern and efficiency are shown. The isolation (S21) between the antennas is more than 20 dB, and the envelope correlation coefficient (ECC) is less than 0.02. A prototype of the proposed antenna chiselling in the metal-housing mobile handset (with 160 mm in length, 10 mm in height, and 70 mm in width) is fabricated and experimentally studied.

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SWB MIMO Antenna with Dual Band Rejection Characteristics and Polarization Diversity for UWB Applications

10.21203/rs.3.rs-555061/v1 ◽

2021 ◽

Author(s):

Faezeh Bahmanzadeh ◽

Farzad Mohajeri

Keyword(s):

Communication Systems ◽

Coplanar Waveguide ◽

Impedance Matching ◽

Wide Band ◽

Ring Resonators ◽

Dual Band ◽

Special Technique ◽

Polarization Diversity ◽

Mimo Antenna ◽

Half Wavelength

Abstract In this paper a super wide band 2-element MIMO antenna with dual band-notched characteristics and high isolation is presented for use in broadband polarization diversity communication systems. Total dimensions of the fabricated antenna is 34 × 60 mm2 and achieves a super wide impedance matching of more than 15 GHz from 2.3 to 18 GHz due to the simulated and measured results which covers L, S, C, X, Ku bands and some parts of K band with two notched frequency bands around 3.1 – 3.7 GHz for WiMAX and 5.1 – 5.8 GHz for WLAN which realized by etching two half-wavelength elliptic single complementary split-ring resonators (ESCSRRs) of different dimensions on the radiating patches. This antenna comprises two identical elements which placed orthogonally to each other and fed by two 50Ω coplanar waveguide (CPW) lines, therefore an isolation of more than 20 dB is obtained autonomously without utilizing any other special technique. Diversity performance in terms of envelop correlation coefficient (ECC< 0.0035), multiplexing efficiency (ηmux > -1 dB) and diversity gain (DG > 9.99 dB) are also calculated, showing satisfactory MIMO characteristics.

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Compact Dual-Band MIMO Antenna System for Mobile Handset Application

IEICE Transactions on Communications ◽

10.1587/transcom.e98.b.2463 ◽

2015 ◽

Vol E98.B (12) ◽

pp. 2463-2469 ◽

Cited By ~ 1

Author(s):

Lingsheng YANG ◽

Jianping FANG ◽

Tao LI

Keyword(s):

Antenna System ◽

Dual Band ◽

Mimo Antenna ◽

Mobile Handset

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A side-edge frame dual-band eight-element MIMO antenna array for 5G handset

International Journal of Microwave and Wireless Technologies ◽

10.1017/s1759078721001446 ◽

2021 ◽

pp. 1-11

Author(s):

Mahsa Zabetiakmal ◽

Gholamreza Moradi ◽

Ayaz Ghorbani

Keyword(s):

Mimo System ◽

Impedance Matching ◽

Correlation Coefficients ◽

Dual Band ◽

Slot Antenna ◽

Radiation Characteristics ◽

Mimo Antenna ◽

Side Edge ◽

Mobile Handset ◽

High Band

Abstract In this paper, a dual-band 8 × 8 multi-input multi-output (MIMO) array antenna operating in 3.5 GHz band (3400–3600 MHz) and 5.5 GHz band (5150–5925 MHz) for 5G mobile handset is presented. The proposed hybrid antenna includes a comb-shaped monopole and an L-shaped open slot antenna which are symmetrically located on the inner surface of the side-edge frame of smartphone. Pattern diversity is achieved that can mitigate envelope correlation coefficients (ECCs) and improve the MIMO system performances. The prototype of proposed dual-band eight-element MIMO antenna is fabricated and experimentally measured. The results show that isolation <−10 and <−15 dB, respectively in the lower band and high band without any additional decoupling element are achieved and the desired bands are satisfied under the condition of −6 dB impedance matching. Moreover, the essential parameters for evaluation of the MIMO system performance such as the ECC, mean effective gain (MEG), and ergodic channel capacity are calculated. Furthermore, the influence of user's hand on the radiation characteristics of proposed MIMO antenna are also investigated and discussed. Based on the result, the proposed MIMO antenna is a good candidate for use in future 5G applications.

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