Content of review 1, reviewed on April 02, 2018

  1. The authors have presented the design of four integrated Fibonacci-type GSM-UWB antennas with single, dual and triple band-notched characteristics to control potential interference in WiMax and WLAN band frequencies.
  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 antennas.
  3. The authors presented, in Table 3, a comparison of the proposed antenna with previously published UWB antennas with single/multi band-notched characteristics. In this table, the authors have reported nine antennas that have been reported in the literature [4, 7, 8-9, 11-15]. These antennas have different structures to produce the relevant antennas. 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
  4. To make the comparison, in Table IV, reasonable, it is customary to use the guided wavelength, as a measure for the antenna size, because it takes into account both the lower frequency and dielectric constant. The antennas reported in [4, 7, 8-9, 11-15] have been designed using substrates with different dielectric constants of 4.4, 2.2, 3.38, 4.9, 10.2, 4.4, 4.4, 3, 2.9, 4.4 respectively. Although these antennas have almost the same, but when using the guided wavelength, I think different results will be shown other than those reported in the table.
  5. The term (return loss) is a positive quantity. It has been used in the article to mean S11 which is a negative quantity. It should be replaced by the input reflection coefficient or just S11 as appropriate.

Source

    © 2018 the Reviewer (CC BY 4.0).