Design and implementation of a very compact mimo antenna providing dual notches at wlan and x-band

A very compact Multiple-Input-Multiple-Output (MIMO) radiator providing dual notches is presented in this paper. It comprises circular ring monopoles fed by a microstrip line embedded with a slot of inverted U-shape. By etching a crescent slot, a split ring resonator slot, a circular slot in the circular monopole, a reversed U-shaped slot inserted along the feeding line, two notches are attained. It operates from 3.5 GHz to 12 GHz that overcomes interference from the Wireless Local Area Network (WLAN) (5.15–5.85 GHz) and X-band (7–8.1 GHz). MIMO antenna has a very compacted dimension of 44 mm ×44 mm ×1.6 mm at the lowest operating frequency and hence is suitable for portable devices. It has dimensions of 0.51λ × 0.51λ × 0.018λ where λ is the wavelength of the lowest operating frequency 3.5 GHz. © 2020, Electromagnetics Academy. All rights reserved.