Compact dual wide‐band four/eight elements MIMO antenna for WLAN applications

Abstract

A compact four and eight elements multiple-input-multiple-output (MIMO) antenna designed for WLAN applications is presented in this article. The antenna operates in IEEE 802.11b/g WLAN (2.4 GHz), IEEE 802.11 ac/n WLAN (5.2 and 5.8 GHz) and WiMAX (5.8 GHz) bands. The resonated mode of the antenna is achieved by two unequal Reverse-L shaped, line-shaped slots on top and parasitic element on the ground layer. The single antenna provides wide bandwidth of about 29% (2.3-3.1 GHz) in lower and 22% (4.9-6.1 GHz) in the upper band. The compactness of the single element antenna is found about 95% with respect to the patch and 61% in overall dimension. Thereafter an investigation is carried out to design two, four, and eight elements MIMO antennas. All of the multi-element structures provide compact configuration and cover entire WLAN frequency ranges . The dimension of the proposed eight element MIMO antenna is 102 × 52 × 1.6 mm 3 . It covers the frequency (measured) from 2.4 to 3.1 GHz and 5 to 6.1 GHz. The diversity performance of the proposed MIMO antenna is also assessed in terms of the envelope correlation coefficient (ECC), diversity gain (DG), and total active reflection co-efficient (TARC). The ECC is found <0.5 whereas the DG >9.0 is obtained for the desired bands. K E Y W O R D S broadband antenna, compact antenna, dual band MIMO, eight element MIMO, four element MIMO

A 2 × 1 array‐based wideband mm‐wave antenna integrated with a 2‐element multiple‐input‐multiple‐output antenna for 5G mobile terminals

“…[1][2][3] Besides, for present-day smart devices, the microstrip antenna is considered to be an essential part because of its capability to act as a multi-band or multi-mode antenna.. 4,5 The use of multiple-input-multiple-output (MIMO) technology has been given unlimited consideration across the past decade. 6 It is acknowledged that through the use of MIMO technology, the data rate of the network can be efficacious strengthened. 7,8 On the other hand, the use of multi-radiating parts simultaneously leads to an increase in the complexity of MIMO antenna configuration.…”

Design of a MIMO antenna for high throughput WLAN applications

“…For Wi‐Fi routers, an omnidirectional pattern with high gain is usually desirable, in this case a balanced antenna with combined omnidirectional gain pattern would be a good choice for the system. The envelope correlation coefficient (ECC) is a measure that describes how much the communication channels are isolated or correlated with each other 1‐10 . The ECC can be reduced by getting better isolation between or among antennas.…”

“…The envelope correlation coefficient (ECC) is a measure that describes how much the communication channels are isolated or correlated with each other. [1][2][3][4][5][6][7][8][9][10] The ECC can be reduced by getting better isolation between or among antennas. Lastly, EMC design is necessary for ensuring high throughput.…”

Printed 5g Mimo Antenna Arrays in Smartphone Handset for Lte Bands 42/43/46 Applications

“…Despite the above-mentioned positive aspects of a MIMO system, there are still many challenges for researchers in designing a compact multi-antenna system for mobile devices having better antenna performance in terms of low mutual coupling and envelope correlation coefficient (ECC) between the antenna elements [4]. In future 5G system below sub-6 GHz spectrum, long term evolution (LTE) communication bands LTE 42/43 (3400-3600 MHz/3600-3800 MHz) and LTE 46 (5150-5925 MHz) besides LTE 2300 (2300-2400 MHz) and LTE 2500 (2540-2620 MHz) have been adopted as standards for smartphones with a massive MIMO antenna array [5][6][7][8][9][10][11][12][13]. In a massive MIMO scheme, a relative large number of compact LTE antennas (N ≥ 6 or 8) arranged at the two sides of a mobile printed circuit board (PCB) with high antenna efficiency and low ECC should be adopted for operation in a 5G communication system [14].…”