Antenna for Fifth Generation (5G) Using a EBG Structure - New Contributions in Information Systems and Technologies - page 31

Fig. 2. Dimensions of the antenna proposal, with width equal to 4.4 mm and length equal to 3.3 mm

The dimensions were purchased through the TTL Method. Figure 3 shows the
curve relating the length of the patch with the frequency, using a fixed width of 4.4
mm and a relative permittivity of 2.2.

F requenc y x Leng h t

35

Method LTT

30

25

20

15

10

2 3 4 5 6 7 8 9 10

Length (mm)

Fig. 3. Resonance frequency depending of the length using the TTL Method

According to the above figure we can check that for the 28 GHz frequency, the
length of the patch is approximately equal to 3.3 mm, validating the method used.
Figure 4 shows the reflectance with frequency of 28.1 GHz at a level of-17.17 dB.
The bandwidth measurement is between 27.32 GHz to 28.94 GHz for a reflection
coefficient of less than -10 dB, what is acceptable, totaling 1.6 GHz band.