Compact triple band-notched UWB MIMO antenna with simple stepped stub to enhance wideband isolation

作者：Huang, Hui-Fen^*; Xiao, Shu-Guang

来源：Progress in Electromagnetics Research Letters, 2015, 56: 59-65.

DOI：10.2528/PIERL15081405

• FR4 substrates
• High isolation
• Multiple input multiple output antennas
• Printed monopoles
• Rejection band
• Simple structures
• Simulations and measurements
• Split ring resonator

In this paper, a very compact ultra-wideband (UWB) multiple-input-multiple-output (MIMO) antenna, with a high isolation and triple notched bands, is proposed. Its size is dramatically decreased to 30×26×0.8mm3 on a cost-effective FR4 substrate. It consists of two rectangular printed monopole (PM) elements and a simple stepped ground stub to enhance wideband isolation. For two different rejected bands of the wireless local area network (WLANs) covering 5.15–5.35 and 5.725–5.825 GHz, four parasitic C-shaped split-ring resonators (PCSRR) are placed on either side of the feed line. By etching two inverted U-shaped slots on the center of the patch, the notched frequency at 4GHz C-band (3.7–4.2GHz) of satellite communication systems is obtained. The results of simulation and measurement prove a bandwidth of S11<−10 dB and S12<−21 dB over the whole band (3.1–11.2GHz) excluding the three independently adjustable rejection bands. Hence, the proposed UWB MIMO antenna has a very small size, simple structure, higher isolation and three narrower notched bands which effectively save more useful frequencies. Moreover, it is a good candidate for wireless portable UWB MIMO applications.

• 出版日期2015
• 单位华南理工大学