TRIPLE-BAND MIMO ANTENNA DESIGN WITH LOW MUTUAL COUPLING USING DEFECTED GROUND STRUCTURE

  • Dương Thị Thanh Tú
  • Nguyễn Gia Thắng
  • Vũ Văn Yêm

Abstract

The multiband MIMO antenna design for broadband mobile’s applications is proposed in this paper. The proposed MIMO antenna that is based on the PIFA structure and designed on FR4, gets compact in size with total dimension of 37x43.6x6 mm3. At first, a MIMO PIFA antenna is presented using U-shaped Slots on radiating patch and two rectangular DGSs on the ground plane which puts forward the antenna resonant in three frequencies: 2.46 GHz, 3.3 GHz, and 6.3 GHz with bandwidths of 8.44%, 9.76% and 2.3% respectively for Wi-Fi, Wimax/LTE and Direct Broadcast Satellite DBS of C channel applications. Good return loss, antenna gain, and radiation pattern characteristics are obtained in the frequency band of interest. Then, to reduce the mutual coupling between antenna elements at close distance of 4 mm, equivalent to 0.032l at 2.4 GHz resonant frequency, a novel “slot and variation structure” of DGS is proposed. Moreover, this DGS has enhanced MIMO antenna bandwidth at all three bands, especially at 3.5GHz resonant frequency.
điểm /   đánh giá
Published
2017-08-31
Section
Bài viết