In this letter, multi-band coplanar waveguide (CPW) fed multiple-input-multiple-output (MIMO) antenna is presented for Bluetooth, WLAN and WiMAX applications. The elements of MIMO antenna are identical CPW-fed printed monopole antennas whose bandwidth performances are improved by employing inverse U and meander line slots. In the design of the antennas, a low-cost FR4 substrate is used and the size of the element antennas are optimized as 35 mm x 30 mm. According to the measurements, S 11 is below 210 dB in 2.38 GHz -2.52 GHz and 3.19 GHz -6.44 GHz bands with 0.2 dB and 2.9 dB average peak realized gains, respectively. The element antennas are placed orthogonally and fed independently to obtain MIMO structure whose size is optimized as 42 mm x 62 mm. The performance of MIMO antenna is also examined in terms of diversity parameters such as envelope correlation coefficient and apparent diversity gain, which are lower than 0.02 and higher than 9.9 in the operating bands, respectively.

In the above-mentioned article, which appeared in Microwave and Optical Technology Letters, Volume 59#01, DOI 30226, a few typing errors were introduced by journal. The corrections are shown below:The correct caption of Figure 2 is the following:Simulation of effective permittivity at 6GHz of a bilayer as function of thickness of Rohacell V R layer and conductivity of conductive layer. The conductive composite is 175 lm thick and e Rohacell 51:106. Effective permittivity must at least cross the 0 to 1 gap for a chosen conductivity of composite (e.g., r524 S/m). The correct caption of Figure 3 is the following:Illustration of Rohacell V R -CNT film bilayers and their effective permittivity characterized by PNAX.In subsection 2.3. EM Characterization, the word Rohacell should be written Rohacell V R .In Table 1, the third column name is t Rohacell instead of t Rohaceii .In the section 3. Results and discussion, the end of the first paragraph should be corrected as:Our implementation process provides a low thickness film of 175lm, while simulations give the lower bound of the composite conductivity to reach e eff 50 depending on the dielectric layer. The conductivity of the AquaCyl TM CNT sandwich is fixed at r composite 524S/m so that a realistic variation of the Rohacell V R allows sweeping the 0 < e eff < 1 range.In the same section 3, Results and discussion, the word Rohacell(g) should be Rohacell V R .The correct caption of Figure 6 is the following:Near field characterization of a metallic cylinder in (a) which is cloaked by a stack of 5 Rohacell V R -CNT composite bilayers in (b). The free space is characterized in (c) for comparison with cloaked system.In the acknowledgments, all the accents are missing. The correction is: [. . .] This work is also supported by the MINATIS project co-funded by the European Regional Development Fund (ERDF) and the Walloon region, and by the Communaut e Française de Belgique, through the project "Nano4waves" funded by its research program "Actions de Recherche Concert ees." [. . .] We thank R. Berben, P. van Velthem, M. Sclavon, P. Danl ee and P. Lipnik for assistance during processing and microscopic observations. In addition, incorrect reference writing were included. The correction is shown below:16. Y.