**6. Conclusions**

After a brief introduction on the main AM processes, this chapter has summarized the huge work realized by the microwave community on the applicability of AM process on the manufacturing of RF components. For reader convenience, **Table 3**


**Table 3.**

*Accuracy and exploited frequency range of the three AM processes reported in this chapter: SLM, SLA, FDM.*

reports the obtained results in terms of accuracy in the relevant frequency range. The most used technology is SLM since it allows the manufacturing of all metal parts. SLA exhibits the best manufacturing accuracy and the largest bandwidth. FDM is used for cheaper components in a low-frequency range, due to the worst manufacturing accuracy. The study/research on AM for microwave components manufacturing is still ongoing, many thematic special sessions are organized within the main conferences in the microwave area. Large margins of improvement are expected in the near future from the manufacturing and design points of view in particular from the integration of different functions in the same realized part.
