CPW Fed Double T-Shaped Array Antenna with Suppressed Mutual Coupling

Abstract

A compact CPW-fed double T-Shaped antenna is proposed for dual-band wireless local area network (WLAN) operations. For the proposed antenna, the -10 dB return loss bandwidth could reach about 25.5% for the 2.4 GHz band and 5.7 % for the 5 GHz band, which meet the required bandwidth specification of WLAN standard. To reduce the mutual coupling and get high isolation between two dual-band antennas, we proposed the novel electromagnetic band gap (EBG) structures. When the EBG structure is employed, a -13dB and -30dB mutual coupling reduction is achieved at 2.4 and 5.2 GHz. It shows that the features of small size, uniplanar structure, good radiation characteristics and small mutual coupling are promising for multi-input multi-output (MIMO) applications.

Reduction of Surface Waves in Arrays using Uni-Planar EBG

“…These CPW lines have the advantages like low radiation leakage, less dispersion, uniplanar configuration. A stub is arranged, to minimize the surface waves between the elements [2]. In [3], the surface waves will play a significant role, when EM energy is trapped between the patches.…”

A compact orthogonal wideband printed mimo antenna for WiFi/WLAN/LTE applications

“…Several methods for improving isolation in MIMO antennas have been reported , including: neutralization lines , stubs , element positioning , EBG , slotted ground‐planes , and the use of separated semicircular monopoles . On reviewing these techniques it can be seen that most of the realizations deliver low mutual coupling in dual‐band performance, but at the expense of a relatively large physical footprint.…”

“…In recent years, several methods in enhancing the isolation of the MIMO antenna have been reported [5][6][7][8][9][10][11][12][13][14]. Techniques such as neutralization line [5,6], stub [7][8][9][10], the position of the antenna elements [11], the EBG structure [12], slots on the ground plane [13] and using separated semicircular monopoles [14] have been utilized.…”

“…Techniques such as neutralization line [5,6], stub [7][8][9][10], the position of the antenna elements [11], the EBG structure [12], slots on the ground plane [13] and using separated semicircular monopoles [14] have been utilized. By reviewing existing methods in [5][6][7][8][9][10][11][12][13][14], it is noticed that low mutual coupling with dual band performances can be achieved, but large in size.…”

The effect of meander line slit on lower band printed MIMO antenna

“…Lower mutual coupling can result in higher antenna efficiencies and lower correlation coefficient [7]. Several approaches have been made to mitigate this problem in [8][9][10][11][12][13].…”