**5. Conclusions**

UWB microwave circuits play a vital role in modern electronic systems for Aerospace, defence and Security applications. They are inserted to appropriately

**39**

**Author details**

Ernesto Limiti and Patrick E. Longhi\*

provided the original work is properly cited.

\*Address all correspondence to: longhi@ing.uniroma2.it

*UWB Circuits and Sub-Systems for Aerospace, Defence and Security Applications*

transfer the RF signal to/from the radiating element and perform some preliminary signal processing: phase and amplitude control, frequency conversion, and mea-

Patrick E. Longhi would like to thank friends and colleagues at Elettronica Group in Rome (ITA) for the many fruitful and insightful technical discussions dur-

Electronic Engineering Department, University of Rome Tor Vergata, Rome, Italy

© 2019 The Author(s). Licensee IntechOpen. This chapter is distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/ by/3.0), which permits unrestricted use, distribution, and reproduction in any medium,

Topologies and technologies need to be carefully leveraged in order to obtain the best possible performance. While in the past the trend was to design one circuit to implement one functionality applying the *divide-et-impera* (divide-and-conquer) paradigm nowadays we are looking at *all-in-one* highly integrated solutions. Of course this integration comes to the expanse of much higher circuit synthesis and

*DOI: http://dx.doi.org/10.5772/intechopen.87095*

analysis complexity.

**Acknowledgements**

surement of some fundamental signal characteristic.

ing his time spent in the company as a Microwave Engineer.
