A Two-element Wideband MIMO Antenna For X-Band, Ku-Band, K-band Applications

A two-element wideband MIMO antenna is presented in this letter. This wideband MIMO is composed of two inverted E-shaped monopole elements having symmetrically configuration, and uses of dumbbell shaped slot structure between central positions of two elements to achieve low mutual coupling. It has covered wide frequency bandwidth from 8.47 GHz to 26.76 GHz with higher isolation (more than 22 dB). The overall dimension of this antenna is 35mm × 40mm × 1.6mm. This simulated antenna is realized on FR4 substrate with relative permittivity of 4.4.The ECC (envelope correlation coefficient) and diversity gain are also studied and calculated which provide satisfactory results over the entire operating band for the application of X-band, Ku-band and K-band.