TAILIEUCHUNG - Compact Triple-Band MIMO Antenna with High Isolation for Handheld Application
A multiband MIMO antenna design for broadband mobile's applications is proposed in this paper. Based on PIFA structure, the proposed MIMO antenna is compact in size and designed on FR4 substrate with total dimension of 37 x x 6 mm3. | VNU Journal of Science: Comp. Science & Com. Eng., Vol. 33, No. 1 (2017) 47-56 Compact Triple-Band MIMO Antenna with High Isolation for Handheld Application Duong Thi Thanh Tu1,2,*, Nguyen Gia Thang1, Nguyen Thi Bich Phuong1, Vu Van Yem2 1 Posts and Telecommunications Institute of Technology, Hanoi, Vietnam 2 School of Electronics and Telecommunications, Hanoi University of Science and Technology, Hanoi, Vietnam Abstract A multiband MIMO antenna design for broadband mobile's applications is proposed in this paper. Based on PIFA structure, the proposed MIMO antenna is compact in size and designed on FR4 substrate with total dimension of 37 x x 6 mm3. At first, a single PIFA antenna is presented using U-shaped slots in radiating patch which puts forward the antenna resonant in three frequencies: GHz, GHz and GHz with bandwidth of , and 3% respectively for Wi-Fi, Wimax/LTE and Direct Broadcast Satellite DBS of C channel applications. Good reflection coefficient, antenna gain, and radiation pattern characteristics are obtained in the frequency band of interest. Secondly, the paper has put forward another single type of tri-band PIFA which uses double rectangular shape of Defected Ground Structure (DGS) technology. This helps increasing the antenna efficiency at all frequencies as well as enhancing antenna gain of the PIFA. Finally, a MIMO PIFA antenna is constructed by placing two single antennas side by side at close distance of 4 mm. The MIMO antenna also gets high gain and radiation efficiency at all frequencies. To reduce the mutual coupling between antenna elements, a combination of two “slot and variation” structures of DGS is proposed. Moreover, these DGS structures have enhanced MIMO antenna bandwidth at all three bands, especially at GHz resonant frequency. Received 06 February 2017; Revised 06 April 2017; Accepted 20 April 2017 Keywords: PIFA, Low mutual coupling, MIMO, DGS. 1. Introduction* multiband for multi .
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