A NOVEL CIRCULARLY POLARIZED MODIFIED SLOT MIMO ANTENNA FOR WLAN APPLICATIONS

作者：Ghahremani M; Ghobadi Ch; Nourinia J; Karamirad M; Mohammadi B^*

来源：Microwave and Optical Technology Letters, 2017, 59(4): 876-880.

DOI：10.1002/mop.30418

• circularly polarized
• multiple-input multiple-output
• slot antenna
• WLAN

The design of a novel circularly polarized (CP) modified slot multiple-input multiple-output (MIMO) antenna for WLAN applications with a small size of 20 x 20 mm(2) is suggested. The MIMO antenna configuration consists of two stepped open-circuit feed-lines to enhance the input matching condition, a square ground plane with circularly etching and two arc-shape slotted stubs along the two opposite edges to produce the CP functionality. To accredit the simulation results, the prototypes of the suggested CP modified slot MIMO antenna are constructed on an inexpensive FR-4 substrate and tested. The outcomes exhibit a 6% (330 MHz, 5.10-5.43 GHz) 3dB axial-ratio bandwidth, and the measured 10-dB impedance bandwidth is 62.9% (4720 MHz, 4,92-9.64 GHz). Antenna feed-lines are Microstrip-Microstrip to gain a high isolation and low envelope correlation between the two input ports. Fine efficiency of the propounded antenna over the working bands are also received. The outcomes demonstrate, which the antenna can be evaluated as a suitable choice for CP MIMO systems.

• 出版日期2017-4