Compact Multi-Band Mimo Antenna With Improved Isolation

Abstract

Abstract-Nowadays everyone needs electronic gadgets in compact size, and single device should accomplish all the tasks. A compact MIMO antenna resonating at multi-band of frequencies is proposed in the current research work. The proposed MIMO antenna consists of two elements. The edge to edge separation between the two antennas is λ 0 /31 and still maintains low mutual coupling levels between the two antennas.

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.…”

“…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. On the contrary, antennas in [13] and [15] engage less space at the cost of isolation.…”

“…Several methods have been devised to design a solitary radiating structure to operate on a number of bands instead of supporting many applications dedicated antennas in a particular device. This leads to the evolution of antennas resonating at multiple frequencies [10][11][12][13][14][15][16][17][18][19]. A dual band dual polarized high isolation antenna offering more than 95% efficiency is proposed in [10].…”

“…A tri-band MIMO antenna designed for WLAN/WiMAX applications uses symmetrically placed C-shaped monopoles as the radiating elements [18], and coupling reduction between the antenna elements is achieved by etching an ellipse ended step slot on the ground plane. A MIMO antenna composed of hexagonal patches or slots is designed to operate at multiple frequencies [19]. This arrangement contributed in reducing the mutual coupling more than 30 dB.…”

Analysis of Multi-Band Circle Mimo Antenna Design for C-Band Applications

“…A triband MIMO antenna [24] has a size of 40 × 35 mm 2 for WiMAX, radio astronomy and WLAN applications with reduced isolation (S 12 ) around −52 dB. In [25], a compact multi-band MIMO radiator improved the isolation parameter greatly. In this research paper, an interesting observation has been made that a radiator having a total area of 40 mm × 40 mm 2 was greatly improved with S 11 of −46.8 dB, S 12 of −40.75 dB, operating range of frequencies from 2.0 to 10.0 GHz, a peak gain of 4.16 dBi, and ECC as low as 0.005.…”