Small frequency range discrete bandwidth tunable multiband MIMO antenna for radio/LTE/ISM-2.4 GHz band applications

Design and Analysis of Dual Narrow Band MIMO (DNB-MIMO) Antenna for IoT Applications

“…The proposed antenna has a lower ECC than [7-9, 11, 12] because of the low mutual coupling characteristics. TARC was not reported in [7][8][9][10][11][12][13], and a lower TARC value is exhibited when compared with [14,15] .…”

“…• The mutual coupling of the designed antenna are better than those of [8][9][10][11][12][13][14][15] without a decoupling structure.…”

“…Considering the above constraint, the antennas for IoT applications should be smaller and have reduced bandwidth (approximately 1MHz is also supportable for many applications), which is main challenge when designing antennas [3,4]. It has been found that the IoT applications based on various multiband antennas [5][6], and multiband MIMO antenna designs have been investigated [7][8][9][10][11][12][13][14][15][16][17]. A complementary S-shape meander line has been integrated with a slotted rectangular box and capacitive load for WLAN application, showing a gain 1.347 dBi and a radiation efficiency of 79% [5].…”

“…A 4-port dual-band antenna consisting of two symmetrical twisting inverted-F antenna [11]. Tunable, triangular-and Cshaped MIMO antennas with a meander line-shaped are used for LTE/ISM-2.4 GHz/5G/WiMAX bands [12][13][14]. For a rectangular patch antenna connected to a complementary split-ring resonator (CSRR) in the ground plane, the antenna ports are created by inserting T-shaped structure, and modified U-shaped resonator were used to reduce mutual coupling between the ports [15][16][17].…”

Multiple Elements MIMO Antenna System With Broadband Operation for 5th Generation Smart Phones

“…One of the key requirements is to develop antenna such that it maintains its compactness and provide good isolation when the single element is extended to the multi-port configuration [16][17][18]. Furthermore, more than one of the operating bands should be covered to provide multi-band transmission with a reasonable efficiency within the operating band [19][20][21]. Thus, the antenna should also be able to provide multifunctioning to meet the new challenging while maintaining the other standards.…”