Multiband MIMO antenna using orthogonally polarized dipole elements for mobile communications

2011 ◽  
Vol 53 (9) ◽  
pp. 2043-2048 ◽  
Author(s):  
Minseok Han ◽  
Jaehoon Choi
Keyword(s):  
Mobile Communications ◽  
Mimo Antenna

scholarly journals Design and Analysis of MIMO Dual Band Patch Antenna for 5G New Radio Applications in Mobile Terminals

2021 ◽  
Vol 9 (VI) ◽  
pp. 5446-5451
Author(s):  
Swati Dhandade
Keyword(s):  
Mobile Communications ◽  
Antenna Design ◽  
Dual Band ◽  
Slight Variation ◽  
Band Frequency ◽  
Mimo Antenna ◽  
High Isolation ◽  
New Radio ◽  
Compact Size ◽  
5G Mobile Communications

This paper presents a dual-band MIMO antenna design with compact size for 5G communication under 6 GHz band frequency. The metallic monopole stub structure is used to miniaturization of antenna. The L-shape monopole antenna is modified by adding semi-circular element in radiating structure of monopole to obtain dual-band resonance. The High isolation is achieved by employing T-shaped stub in ground plane.It has compact size is 45 mm × 25 mm × 1.6 mm3. The proposed Dual Band MIMO antenna has been design on FR4 material with ɛr = 4.4 with 1.6 thickness. The proposed antenna has 5G application in the bands of 2.5 GHz (2.34 GHz-2.62 GHz) and 3.5 GHz (3.20 GHz-5.20 GHz). The bandwidth of antenna getting 320MHz and 2500MHz at 2.5GHz and 3.5GHz respectively. The Isolation (S21) of proposed antenna is -31.2 dB at 2.5 GHz and -19.5 dB at 3.5 GHz. VSWR is less than 1.06 for both the bands. The designed dual band MIMO antenna covers 5G bands of 2.3-2.4GHz (n30/n40), 2.4-2.5GHz (n7/n38/n41/n90), and 3.2-5.2GHz (n77/n78/n80). The experimental and simulated results observed good matching except some slight variation. This proposed dual band MIMO antenna is suitable for 5G mobile Communications.

Dual-band (28/38 GHz) MIMO Antenna System for 5G Mobile Communications with Efficient DoA Estimation Algorithm in Noisy Channels

2021 ◽  
Vol 36 (3) ◽  
pp. 282-294
Author(s):  
Asmaa Farahat ◽  
Khlaid Hussein
Keyword(s):  
Mobile Communications ◽  
Communication Systems ◽  
Doa Estimation ◽  
Antenna System ◽  
Dual Band ◽  
Linear Antenna ◽  
Mimo Antenna ◽  
Single Antenna ◽  
Simulation Results ◽  
5G Mobile Communications

In this paper, a dual-band (28/38 GHz) linear antenna arrays of four and eight elements are proposed to work as a MIMO arrays for the 5G communication systems. Each element in the array is a dual-band Yagi-Uda antenna designed to operate at 28 and 38 GHz. The eight-elements array size has a total dimension of 79.4 mm x 9.65 mm excluding the feeding microstrip line. The maximum gain of the array is about 18 dB. The peaks of correlation at matched angles (PCMA) technique is applied to determine the direction of arrival for multiple incoming signals. The effects of phase noise and additive Gaussian noise on the error in the DoA estimation are studied showing good accuracy of the PCMA algorithm. Numerical and experimental investigations are achieved to assess the performance of both the single-element antenna and the eight-element MIMO linear antenna array. It is shown that the simulation results agree with the experimental measurements and both show good performance of the single antenna as well as the MIMO linear array system. The envelope correlation coefficient (ECC) and the diversity gain (DG) are calculated and the results show that the proposed MIMO antenna system is suitable for the forthcoming 5G mobile communications. The radiation patterns for single antenna and four-element array are measured and compared to the electromagnetic simulation results showing good agreement.

scholarly journals An Optimal Design of Multiple Antenna Positions on Mobile Devices Based on Mutual Coupling Analysis

2011 ◽  
Vol 2011 ◽  
pp. 1-10 ◽  
Author(s):  
Peerapong Uthansakul ◽  
Danai Assanuk ◽  
Monthippa Uthansakul
Keyword(s):  
Mobile Device ◽  
Mobile Communications ◽  
Mutual Coupling ◽  
Mimo Systems ◽  
Practical Implementation ◽  
Multiple Antenna ◽  
Multiple Antenna Systems ◽  
Mimo Antenna ◽  
Channel Variation ◽  
Main Factor

The topic of practical implementation of multiple antenna systems for mobile communications has recently gained a lot of attention. Due to the area constraint on a mobile device, the problem of how to design such a system in order to achieve the best benefit is still a huge challenge. In this paper, genetic algorithm (GA) is used to find the optimal antenna positions on a mobile device. Two cases of3×3and4×4MIMO systems are undertaken. The effect of mutual coupling based onZ-parameter is the main factor to determine the MIMO capacity concerning the objective function of GA search. The results confirm the success of the proposed method to design MIMO antenna positions on a mobile device. Moreover, this paper introduces the method to design the antenna positions for the condition of nondeterministic channel. The concern of channel variation has been included in the process of finding optimal MIMO antenna positions. The results suggest that the averaging position from all GA solutions according to all channel conditions provides the most acceptable benefit.

scholarly journals MIMO Antenna System for Multi-Band Millimeter-Wave 5G and Wideband 4G Mobile Communications

IEEE Access ◽  
2019 ◽  
Vol 7 ◽  
pp. 181916-181923 ◽  
Author(s):  
Emad Al Abbas ◽  
Muhammad Ikram ◽  
Ahmed Toaha Mobashsher ◽  
Amin Abbosh
Keyword(s):  
Millimeter Wave ◽  
Mobile Communications ◽  
Antenna System ◽  
Mimo Antenna ◽  
Multi Band

Mobile communications in hospitals

Anaesthesia ◽  
2000 ◽  
Vol 55 (7) ◽  
pp. 727-728 ◽  
Author(s):  
J. A. Lack
Keyword(s):  
Mobile Communications

GPS and GSM Based Tracking System for Objects Moving over Wide Geographical Areas

2018 ◽  
Vol 2 (1) ◽  
Author(s):  
Fatima Ameen ◽  
Ziad Mohammed ◽  
Abdulrahman Siddiq
Keyword(s):  
Global Positioning System ◽  
Mobile Communications ◽  
Moving Objects ◽  
Tracking System ◽  
Geographical Area ◽  
Tracking Systems ◽  
Acceptable Result ◽  
Internet Service ◽  
Global Positioning ◽  
Tracking Objects

Tracking systems of moving objects provide a useful means to better control, manage and secure them. Tracking systems are used in different scales of applications such as indoors, outdoors and even used to track vehicles, ships and air planes moving over the globe. This paper presents the design and implementation of a system for tracking objects moving over a wide geographical area. The system depends on the Global Positioning System (GPS) and Global System for Mobile Communications (GSM) technologies without requiring the Internet service. The implemented system uses the freely available GPS service to determine the position of the moving objects. The tests of the implemented system in different regions and conditions show that the maximum uncertainty in the obtained positions is a circle with radius of about 16 m, which is an acceptable result for tracking the movement of objects in wide and open environments.

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