Ultra-Compact Reconfigurable Band Reject UWB MIMO Antenna with Four Radiators

Khan, Muhammad Saeed; Iftikhar, Adnan; Shubair, Raed M.; Capobianco, Antonio-Daniele; Asif, Sajid M.; Braaten, Benjamin D.; Anagnostou, Dimitris E.

doi:10.3390/electronics9040584

Cited by 22 publications

(18 citation statements)

References 25 publications

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“…However, the planar configuration of the reported design along with the incapability to provide necessary bandwidth for 4G and 3G communications having band rejection feature may not be an appropriate solution for the forthcoming 5G technology because of low footprint requirements. Likewise, four element reconfigurable band reject UWB-MIMO antenna, having two elements in planar configuration and two elements fixed at ± 45 • is proposed in [29]. The proposed configuration offers excellent band rejection, however, hardware complexity and fixation of angularly placed elements are major hindrances of this design for modern 4G/5G communication devices.…”

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confidence: 99%

Eight-Element Compact UWB-MIMO/Diversity Antenna with WLAN Band Rejection for 3G/4G/5G Communications

Khan

Iftikhar

Shubair

et al. 2020

IEEE Open J. Antennas Propag.

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An eight element, compact Ultra Wideband− Multiple Input Multiple Output (UWB-MIMO) antenna capable of providing high data rates for future Fifth Generation (5G) terminal equipments along with the provision of necessary bandwidth for Third Generation (3G) and Fourth Generation (4G) communications that accomplishes band rejection from 4.85 to 6.35 GHz by deploying a Inductor Capacitor (LC) stub on the ground plane is presented. The incorporated stub also provides flexibility to reject any selected band as well as bandwidth control. The orthogonal placement of the printed monopoles permits polarization diversity and provides high isolation. In the proposed eight element UWB-MIMO/diversity antenna, monopole pair 3−4 are 180 • mirrored transform of monopole pair 1−2 which lie on the opposite corners of a planar 50 × 50 mm 2 substrate. Four additional monopoles are then placed perpendicularly to the same board leading to a total size of 50 × 50 × 25 mm 3 only. The simulated results are validated by comparing the measurements of a fabricated prototype. It was concluded that the design meets the target specifications over the entire bandwidth of 2 to 12 GHz with a reflection coefficient better than −10 dB (except the rejected band), isolation more than 17 dB, low envelope correlation, low gain variation, stable radiation pattern, and strong rejection of the signals in the Wireless Local Area Network (WLAN) band. Overall, compact and reduced complexity of the proposed eight element architecture, strengthens its practical viability for the diversity applications in future 5G terminal equipments amongst other MIMO antennas designs present in the literature. INDEX TERMS Band rejected, compact, diversity, envelope correlation coefficient , multiple input multiple output, ultrawide band, 5G communication, 5G terminal devices. I. INTRODUCTION W IRELESS broadband communication system such as Worldwide Interoperability for Microwave Access (WiMAX (3.4 to 3.6 GHz)), large capacity Microwave Relay Trunk Network (4.4 to 4.99 GHz), and Wireless Local Area Network (WLAN signals in 5.15 to 5.35 and 5.75 to 5.8225 GHz bands), impose a limited power spectral density of the low power and a high data rate

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Eight-Element Compact UWB-MIMO/Diversity Antenna with WLAN Band Rejection for 3G/4G/5G Communications

Khan

Iftikhar

Shubair

et al. 2020

IEEE Open J. Antennas Propag.

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“…Total active reflection coefficient (TARC) denotes the square root of the total ratio of reflected power to incident power & the apparent return loss of the entire MIMO antenna. For a dual-port MIMO system, TARC is evaluated by means of the following Equation (8) [12].…”

Section: Diversity Performancementioning

confidence: 99%

Design and Implementation of a Very Compact Mimo Antenna Providing Dual Notches at Wlan and Xband

Sri¹,

Rani²,

Saritha³

2020

PIER C

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A very compact Multiple-Input-Multiple-Output (MIMO) radiator providing dual notches is presented in this paper. It comprises circular ring monopoles fed by a microstrip line embedded with a slot of inverted U-shape. By etching a crescent slot, a split ring resonator slot, a circular slot in the circular monopole, a reversed U-shaped slot inserted along the feeding line, two notches are attained. It operates from 3.5 GHz to 12 GHz that overcomes interference from the Wireless Local Area Network (WLAN) (5.15-5.85 GHz) and X-band (7-8.1 GHz). MIMO antenna has a very compacted dimension of 44 mm × 44 mm × 1.6 mm at the lowest operating frequency and hence is suitable for portable devices. It has dimensions of 0.51λ × 0.51λ × 0.018λ where λ is the wavelength of the lowest operating frequency 3.5 GHz.

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“…These techniques are, defected ground structure [9,10], decoupling network [11,12], space diversity [13], parasitic elements [14,15], neutralization rings [16], different stub and slots [17][18][19][20][21][22], shorting pins [23], metamaterials [24], and non-uniform transmission line using nonlinear model predictive to reduce mutual coupling [25].…”

Section: Introductionmentioning

confidence: 99%

Isolation and Gain Improvement of a Rectangular Notch UWB-MIMO Antenna

Abbas

Hussain

Sufian

et al. 2022

Sensors

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This paper presents the performance improvement of a co-planar waveguide rectangularly notched UWB-MIMO antenna. The isolation and gain of the antenna are enhanced by using a parasitic isolator. The antenna consists of four microstrip patch antennas and an isolator. The UWB characteristic of the antenna is achieved by truncating the lower ends of the radiating patch by a semicircle. The rectangular notch characteristic is obtained by adding two electromagnetic bandgap structures on the backside of the antenna, which is attached to the radiator via shorting pin. The performance, especially the decoupling of the MIMO antenna is improved by using a novel parasitic decoupler, which is placed between the antennas to receive uncorrelated signals. The decoupling structure consists of a square shape metallic element with a circular slot inside and a half-semicircle slot edged at each corner. Four rectangular metallic stubs are extended from opposite parallel sides to improve further isolation. The simulated and measured results show that the antenna has a rectangular notch band (5.25–5.85 GHz) across the working band of 3–12.8 GHz. In addition, the antenna has a planar structure with an overall size of 60 × 60 × 1.52 mm3 and offers stable gain, reduced mutual coupling (<−21 dB), and lower envelop correlation (<0.001).

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Ultra-Compact Reconfigurable Band Reject UWB MIMO Antenna with Four Radiators

Cited by 22 publications

References 25 publications

Eight-Element Compact UWB-MIMO/Diversity Antenna with WLAN Band Rejection for 3G/4G/5G Communications

Eight-Element Compact UWB-MIMO/Diversity Antenna with WLAN Band Rejection for 3G/4G/5G Communications

Design and Implementation of a Very Compact Mimo Antenna Providing Dual Notches at Wlan and Xband

Isolation and Gain Improvement of a Rectangular Notch UWB-MIMO Antenna

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