Dual wide-band four-unit MIMO antenna system for 4G/LTE and WLAN mobile phone applications

2013 ◽  
Author(s):  
Foez Ahmed ◽  
Ying Feng ◽  
Ronglin Li
Keyword(s):  
Mobile Phone ◽  
Wide Band ◽  
Antenna System ◽  
Mimo Antenna ◽  
Mobile Phone Applications ◽  
4G Lte

scholarly journals MIMO Antenna System with Pattern Diversity for Sub-6 GHz Mobile Phone Applications

IEEE Access ◽  
2021 ◽  
pp. 1-1
Author(s):  
Uzair Ahmad ◽  
Sadiq Ullah ◽  
Umair Rafique ◽  
Dong-You Choi ◽  
Rizwan Ullah ◽  
...  
Keyword(s):  
Mobile Phone ◽  
Antenna System ◽  
Mimo Antenna ◽  
Pattern Diversity ◽  
Mobile Phone Applications

Cellular 4G LTE MIMO Antenna System Modeling Utilizing Measured Vehicle-Level Antenna Patterns

2021 ◽  
Author(s):  
Daniel N. Aloi ◽  
Jia Li ◽  
Esosa Ekhoragbon ◽  
Leo Lanctot ◽  
John Locke
Keyword(s):  
System Modeling ◽  
Antenna System ◽  
Mimo Antenna ◽  
4G Lte

scholarly journals Isolation Improvement in UWB-MIMO Antenna System Using Slotted Stub

Electronics ◽  
2020 ◽  
Vol 9 (10) ◽  
pp. 1582
Author(s):  
Ahsan Altaf ◽  
Amjad Iqbal ◽  
Amor Smida ◽  
Jamel Smida ◽  
Ayman A. Althuwayb ◽  
...  
Keyword(s):  
Multiple Input Multiple Output ◽  
Equivalent Circuit Model ◽  
Wide Band ◽  
Antenna System ◽  
Circuit Model ◽  
Antenna Element ◽  
Performance Parameters ◽  
Mimo Antenna ◽  
High Isolation ◽  
Large Bandwidth

Multiple-input multiple-output (MIMO) scheme refers to the technology where more than one antenna is used for transmitting and receiving the information packets. It enhances the channel capacity without more power. The available space in the modern compact devices is limited and MIMO antenna elements need to be placed closely. The closely spaced antennas undergo an undesirable coupling, which deteriorates the antenna parameters. In this paper, an ultra wide-band (UWB) MIMO antenna system with an improved isolation is presented. The system has a wide bandwidth range from 2–13.7 GHz. The antenna elements are closely placed with an edge to edge distance of 3 mm. In addition to the UWB attribute of the system, the mutual coupling between the antennas is reduced by using slotted stub. The isolation is improved and is below −20 dB within the whole operating range. By introducing the decoupling network, the key performance parameters of the antenna are not affected. The system is designed on an inexpensive and easily available FR-4 substrate. To better understand the working of the proposed system, the equivalent circuit model is also presented. To model the proposed system accurately, different radiating modes and inter-mode coupling is considered and modeled. The EM model, circuit model, and the measured results are in good agreement. Different key performance parameters of the system and the antenna element such as envelope correlation coefficient (ECC), diversity gain, channel capcity loss (CCL) gain, radiation patterns, surface currents, and scattering parameters are presented. State-of-the-art comparison with the recent literature shows that the proposed antenna has minimal dimensions, a large bandwidth, an adequate gain value and a high isolation. It is worth noticeable that the proposed antenna has high isolation even the patches has low edge-to-edge gap (3 mm). Based on its good performance and compact dimensions, the proposed antenna is a suitable choice for high throughput compact UWB transceivers.

Cordate-shaped UWB-MIMO antenna with notch band characteristic and high isolation

2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Preeti Pannu ◽  
Devendra Kumar Sharma
Keyword(s):  
Multiple Input Multiple Output ◽  
Small Variation ◽  
Wide Band ◽  
Antenna System ◽  
Data Rate ◽  
Impedance Bandwidth ◽  
Defected Ground Structure ◽  
Content Type ◽  
Mimo Antenna ◽  
Good Agreement

Purpose This paper aims to design a most demanding low profile and compact ultra-wide band (UWB) antenna system for various wireless applications. The performance (in terms of data rate) of UWB system is improved by using multiple-input-multiple-output (MIMO) technology with it. Owing to the overlap of other existing licensed bands with that of UWB, electromagnetic signals can interfere. So, notched band UWB MIMO antenna system reported here which is highly compact, bandwidth efficient, superior data rate and high inter-element isolation comparatively to other reported designs. Design/methodology/approach A 49 × 49 × 1.6 mm3 quad-port UWB MIMO antenna with specific bandwidth elimination property is designed. The proposed planar MIMO configuration comprises unique four identical “Cordate-shaped” monopole radiators fed by 2.3-mm thick microstrip-lines. The radiators are located right-angled to each other to enhance inter-element isolation. Further, a different approach of slitted-substrate is applied to minimize the overall size and mutual coupling of the MIMO antenna, as a substitute of decoupling and matching structures. The defected ground structure is used to obtain −10 dB impedance bandwidth in entire UWB band, without compromising with the lower cut-off frequency response. Further, to eliminate the undesired resonant band (WLAN at 5.5 GHz) from UWB, a rounded split ring resonator is introduced in monopole patch. Findings In the entire operating band of 2.8 to 11 GHz, isolation among elements is more than 24 dB, envelope correlation coefficient less than 0.002, diversity gain greater than 9.99 dB and TARC less than −7 dB are obtained at all 4-ports. Research limitations/implications The measured parameters of the fabricated prototype antenna on FR4 substrate are found in good agreement with the simulated results. The small variation in software results and hardware results are observed due to hardware design limitations. Practical implications The proposed design may be used for any wireless application following in the range of UWB. Originality/value It can be shown from graphs of measured parameters of the fabricated prototype antenna. They found to be in good agreement with the simulated results.

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