Content of review 1, reviewed on March 31, 2018

  1. The authors have developed a small quad-band planar monopole antenna for (2.4/5.2/5.8GHz) bands WLAN and (3.5/5.5GHz) bands WiMAX applications. Also, the proposed antenna covers the 4.3GHz for ITU-Region1 allocation applications.
  2. The paper is organized well and is easy to read and follow. The authors provided a good introduction, extensive description the fundamental computational techniques behind the proposed system.
  3. The authors presented extensive explanation of the method and detailed experimental results. They presented a satisfactory discussion of the results.
  4. In Table 2, the author has reported five antennas that have been reported in the literature [17, 18, 19, 20, 21]. These antennas have different structures to produce the multiband responses. The common issue the author discussed is the realized size (in mm) of each antenna. In this context, I think the presented comparison is not entirely fair, because the size of an antenna is primarily determined by the lower resonant frequency and the dielectric constant of the substrate. The dielectric constants of the substrates are not included in the table.
  5. To make the comparison, in Table 2, reasonable, it is customary to use the guided wavelength, as a measure for the antenna size, because it takes into account both the design frequency and dielectric constant. The antennas reported in [17, 18, 19, 20, 21] are designed using substrates with different dielectric constants. The first two antennas have dielectric constants of 2.33, and 3.2 respectively while the last three use the same substrate with dielectric constant of 4.4. Also, the lower resonant bands of these antennas are almost the same. When using the guided wavelength, I think different results will be shown other than those reported in the table.

Source

    © 2018 the Reviewer (CC BY 4.0).

References

    Y., Z., M., R. 2017. A Small Quad-Band Monopole Antenna with Folded Strip Lines for WiMAX/WLAN and ITU Applications. Journal of Microwaves, Optoelectronics and Electromagnetic Applications.