Triple Band Notched Dg-Cebg Structure Based Uwb Mimo/Diversity Antenna

Abstract

Abstract-A MIMO/Diversity antenna with triple notch characteristics is proposed in this article. The proposed antenna has triple notches in the WiMAX band (3.3-3.6 GHz), WLAN band (5-6 GHz), and X-band satellite communication (7.2-8.4 GHz) band. Defected Ground Compact Electromagnetic Band Gap (DG-CEBG) is a design used to accomplish band notches. Defected ground planes are utilised so as to achieve compactness in conventional EBG structures. The proposed WiMAX band, WLAN band, and X-band satellite communication band DG-CEBG structures show a compactness of around 46%, 50%, and 48%, respectively, over a conventional EBG structure. In these structures, decoupling strips and a slotted ground plane are used to enhance the isolation between two closely spaced UWB monopoles. The individual monopoles are 90 • angularly separated with a stepped structure which helps to reduce mutual coupling and also contributes towards impedance matching by increasing the current path length. |S 21 | or mutual coupling is found to be less than 15 dB over the whole UWB frequency range. The Envelope Correlation Coefficient (≤ 0.5) is within the acceptable limits over the whole UWB frequency range. Notched frequency depends on the parameters of DG-CEBG structures; when there is a change in these parameters notch frequency is also changed. A low cost FR-4 substrate with thickness (h) = 1.6 mm, permittivity (ε) = 4.4 and loss tangent (δ) = 0.02 is used for the proposed antenna, and it has a compact size of 58 × 45 × 1.6 mm 3 .

A Simple Tri-Band Mimo Antenna Using a Single Ground Stub

“…The proposed MIMO antenna is compared with the other reported antenna structures with respect to physical and the electrical size, bandwidth, isolation and ECC in Table 3. The proposed tri-band MIMO design is comparatively better in terms of size and exhibits a greater isolation than the structures proposed in [7,[13][14][15][16][17][18][19]. The design projected in [19] offers a better isolation but occupies a large board area.…”

“…But the close proximity of the elements lead to pronounced mutual coupling resulting in the performance degradation of the system [2]. Several systems with isolation enhancement techniques including defected ground structures, neutralization line, meta-materials, decoupling strips and extended ground plane have been researched over the years [3][4][5][6][7][8][9]. However, there is a trade-off in the size, bandwidth and design complexity in these mutual coupling reduction techniques.…”

A Metamaterial-Based Compact Planar Monopole Antenna for Wi-Fi and UWB Applications

“…Moreover, the analysis of these structures was always based on several factors, such as wider bandwidth, size, composition, and density. In [15][16][17][18][19], the UWB technique was implemented with a defective ground plane and different shapes of slots or stubs. Although some of these antennas were miniaturized in size, they did not integrate the UWB spectrum with other useful frequency bands for short-range communications.…”

A Miniaturized Dual-Band Mimo Antenna With Low Mutual Coupling for Wireless Applications

“…However, neutralization-line [9,10] has been used to improve the isolation between two-monopole-antenna system. There are still other methods to achieve a better isolation by using metalized via wall [11], electromagnetic band-gap (EBG) structure [12][13][14], etching slots in the ground plane [15,16], and ELC resonator [17].…”