High isolation 4-element ACS-fed MIMO antenna with band notched feature for UWB communications

Ibrahim, Ahmed A.; Ali, Wael A. E.

doi:10.1017/s175907872100009x

Cited by 35 publications

(25 citation statements)

References 27 publications

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“…7. It is noticed that the perpendicular orientation has S 21 lower than -25 dB within the entire frequency band while the side by side orientation has S 21 lower than -10 dB, especially at the lower frequency band which means it has high coupling between elements [12][13][14][15]. So, the perpendicular orientation is used to form the proposed 4 ports MIMO as discussed in the next section.…”

Section: Proposed Single Antenna Structurementioning

confidence: 99%

“…Researchers developed several attempts to enhance the isolation of the UWB MIMO antenna. Some of them used decoupling structures such as stubs [8][9][10] and the others arranged the antenna elements in an orthogonal layout [11][12][13][14][15].…”

mentioning

confidence: 99%

“…So, a band rejection mechanism such as resonators added at a specific location in the patch [16], ground [17], and close to the feed line [18] should be utilized to bypass this problem. UWB MIMO antenna with band rejection mechanisms is proposed in [12,[19][20][21][22]. In [12], 4 ports with band rejection mechanism using L-shaped stubs connected to the semielliptical patch radiator to avoid the band within 3-4 GHz (WiMAX) are introduced.…”

mentioning

confidence: 99%

“…UWB MIMO antenna with band rejection mechanisms is proposed in [12,[19][20][21][22]. In [12], 4 ports with band rejection mechanism using L-shaped stubs connected to the semielliptical patch radiator to avoid the band within 3-4 GHz (WiMAX) are introduced. A bandstop structure etched within the ground plane of the four elements UWB MIMO antenna to produce single band rejection is investigated in [19].…”

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confidence: 99%

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UWB MIMO antenna with 4-element, compact size, high isolation and single band rejection for high-speed wireless networks

Ibrahim

Sree

2022

Wireless Netw

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In this paper, a miniaturized size UWB 4-element MIMO antenna with a band rejection feature is introduced. The four elements have a rectangular radiator with curved edges and a partial ground plane with an etched slot to enlarge the bandwidth of the suggested structure to operate from 3 up to 12 GHz with S11 ≤ − 10 dB. The high isolation between elements was achieved by forming the antennas orthogonally without adding decoupling elements to simplify the design. The suggested design has a size of 47 × 47 mm2 placed on low price FR4 substrate. A simple slot is etched into the radiator to achieve the desired band rejection. The simulated and tested outcomes achieved operated band extended from 3 up to 12 GHz with band rejection feature within 3.3 GHz up to 4.3 GHz to eliminate interference with WIMAX applications and high isolation of more than 22 dB between ports. Also, the antenna fulfills peak gain of 3.5 dBi, envelope correlation coefficient(ECC) < 0.005, diversity gain (DG) 9.98 dB and channel capacity loss (CCL) < 0.4 bit/s/Hz within the operating bands. The outcomes have good consistency which made the suggested antenna to be used in UWB MIMO systems.

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Section: Proposed Single Antenna Structurementioning

confidence: 99%

mentioning

confidence: 99%

mentioning

confidence: 99%

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confidence: 99%

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UWB MIMO antenna with 4-element, compact size, high isolation and single band rejection for high-speed wireless networks

Ibrahim

Sree

2022

Wireless Netw

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“…Recently, various novel types of UWB antennas (with and without notch filters) that serve to construct MIMO antennas are presented in [12][13][14][15][16][17][18][19]. Various MIMO antennas are presented in [20][21][22][23][24]. Despite the 15 dB isolation criterion, it is better to have higher isolation among the antenna ports in order to have better MIMO performance.…”

Section: Introductionmentioning

confidence: 99%

Compact high isolation UWB MIMO antennas

Ahmed

Rodríguez

2022

Wireless Netw

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In this work, two elements (with two versions) compat UWB MIMO antennas are designed and fabaricted. CST software is used in the simulation process. The two elements MIMO antenna have a size of 29.5 × 60 mm2. Measured S parameters show that the MIMO antennas work well from 3 GHz up to 20 GHz (representing the maximum working frequency of the measurent instrumnts). Mesurement results show that the isolation between the antenna elemnts is higher than 23 dB for the first version of the two elements UWB MIMO antenna. In addition, mesurement results show that the isolation between the antenna elemnts is higher than 30 dB for the second version of the two elements UWB MIMO antenna. Measurements show a channel capacity loss lower than 0.4 bps/Hz and a low group delay variation.

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Four‐radiator ultra‐wideband multiple‐input multiple‐output antenna with high performance and dual‐band rejection features for high‐speed communications

Aboelleil

Ibrahim

Khalaf

2022

Int J Communication

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We are discussing a compact, four elements with high-performance ultrawideband (UWB) multiple-input multiple-output (MIMO) antenna with dual band-notched traits. The antenna has a partial ground plane and the radiator has truncation to enhance the matching through the frequency range 2.5-12 GHz. The coupling between ports was reduced by assorting the elements of the antenna in an orthogonal manner and applying four stubs between them.The proposed antenna achieves two band-notched characteristics by introducing a T-shaped strip etched in the radiating elements and adding an open-loop resonator near the feeding line. The results, which were simulated and measured, indicate that the proposed design achieved a wideband from 2.5 to 12 GHz with two band-notched characteristics within 3.3-3.6 GHz (WiMAX implementations) and within 5.2-5.8 GHz (Wireless Local Area Network [WLAN] applications). As well as, the proposed antenna has high isolation >20 dB and a low-envelope correlation coefficient <0.005 through the band except for the band notches. These outcomes demonstrate the adequacy of the proposed UWB MIMO antenna for UWB MIMO applications.band notch, high isolation, MIMO antenna, UWB antenna | INTRODUCTIONUltra-wideband (UWB) technology plays an essential role in modern wireless communication systems and is attractive following the Federal Communications Commission (FCC) approval on frequency bands with no license. 1 UWB systems have many benefits, for example, low price, increasing the data rate, high security, and low power. The antenna is the main element in the UWB system; so many efforts are made to design the optimal UWB antenna. 2,3 But UWB technology faces a multipath problem. Therefore, the multiple-input multiple-output (MIMO) antenna is used as a solution.MIMO technology is used for increasing system capacity without increasing power and quality. [4][5][6][7] There are challenges in designing the MIMO antenna. The main challenges in the design are how to design the MIMO antenna with a compact size, low correlation, an increased number of elements in the antenna to improve the link data rate, and high isolation to be used in portable devices. To increase the isolation in the system, there should be a distance between the antenna elements, and this increases the antenna size; there are various techniques used for improving the system's isolation.

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High isolation 4-element ACS-fed MIMO antenna with band notched feature for UWB communications

Cited by 35 publications

References 27 publications

UWB MIMO antenna with 4-element, compact size, high isolation and single band rejection for high-speed wireless networks

UWB MIMO antenna with 4-element, compact size, high isolation and single band rejection for high-speed wireless networks

Compact high isolation UWB MIMO antennas

Four‐radiator ultra‐wideband multiple‐input multiple‐output antenna with high performance and dual‐band rejection features for high‐speed communications

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