*Co-Design Block PA (Power Amplifier)-Antenna for 5G Application at 28 GHz Frequency Band DOI: http://dx.doi.org/10.5772/intechopen.98653*

**Figure 13.** *Antennas gain.*

**Figure 14.** *Antenna input impedance.*

**Figure 17** shows the gains obtained by these different antennas network. We are now going to explore the gain of the antenna arrays in the E plane in order to observe the side lobes generated; the **Figure 18** below illustrates it.

To confirm the validity of our results, the representation of the impedances of the antenna networks are illustrated in **Figure 19** below.

It is clear that the impedance presented by our input antenna arrays is 50 ohms at the resonant frequency. We will summarize our work on Antennas in the table below (**Table 3**).

**Figure 15.** *Linear antenna arrays modeled with different shape.*

**Figure 16.** *S11 reflection coefficient of antenna arrays.*

*Co-Design Block PA (Power Amplifier)-Antenna for 5G Application at 28 GHz Frequency Band DOI: http://dx.doi.org/10.5772/intechopen.98653*

**Figure 17.** *Gain of different antenna network.*

**Figure 18.** *Representation of gain in plan E of antenna network.*

#### **Figure 19.** *Input impedance of antenna networks.*


*Co-Design Block PA (Power Amplifier)-Antenna for 5G Application at 28 GHz Frequency Band DOI: http://dx.doi.org/10.5772/intechopen.98653*


### **Table 3.**

*Summary of antenna parameters.*
