## 4 Conclusions  
In this paper, the design, construction, verification, and test of a prototype for a reconfigurable radio-transmitter called RABE was presented. The proposed prototype can be used as the communication subsystem in a nanosatellite based on the CubeSat standard. Construction and testing were performed under quality standards in a controlled environment. Results show the correct operation of our card similar to that one commercialized by the IC manufacturer. The resulting implementation of RABE guarantees the reconfiguration of a nanosatellite communication subsystem. Because of this reconfiguration capacity, it is possible to either have a communication with the terrestrial segment or with other devices orbiting in space, as in the BBP stage, different processing stages can be selected (e.g., modulation scheme). Similarly, the RF stage parameters can be modified (e.g., carrier frequency or transmitter power). In short, this design allows reducing the number of unnecessary components, optimizing the dimensions of the PCB, and having a weight and size adequate to the specifications of the CubeSat standard. It is necessary to implement reconfigurable devices and systems externally to a satellite communications subsystem, as shown in the present work and in [10; 16], in order to obtain and complement what is stated in these proposals. Figure 14: Poynting \(S\) Vector. Figure 13: \(\mathbb{E}\) and \(\bar{H}\) field simulations on the RABE transmission line. (**a**) Electric (\(\bar{E}\)) field. (**b**) Magnetic (\(\bar{H}\)) field. It should be noted that power values achieved in the RF output stage of the RABE are sufficient for the subsequent stages of the nanosatellite communications subsystem, which include filters, power amplifiers, and antennas, among others. However, in the future, it will be necessary to carry out measurements of electromagnetic compatibility and susceptibility to the RABE prototype in order to identify anomalies such as interferences with other devices that make up the satellite. In addition to this, it is recommended to carry out Total Ionizing Dose (TID), Single-Event Effects (SEEs), and vibration and thermal vacuum tests to verify the robustness of the design when it comes to being placed in orbit. Furthermore, as future work, it is recommended that both the baseband processing, control, and reconfiguration stage and the RF stage could be integrated on a single PCB trying to minimize the size of the communication system and at the same time optimizing the operating speed. [PERSON] has completed the design and manufacture of the prototype, with the accompaniment of [PERSON] and [PERSON] and under the supervision of [PERSON], [PERSON] and [PERSON]. [PERSON], [PERSON], [PERSON], [PERSON], [PERSON] and [PERSON] made the translation for the present work. [PERSON], [PERSON] and [PERSON] participated in the design of this paper. All authors have read and agreed to the published version of the manuscript. The authors would like to thank the Mexican National Council for Science and Technology (CONACYT) and the Mexican Space Agency (AEM) for supporting project 292793 through the AEM-CONACYT Sectorial Fund for Research and Development in Space Activities, from which this article emerged as a result. The data presented in this study are available on request from the corresponding author. The authors would like to thank the Center for Research, Innovation and Development in Telecommunications (CIDTE) of the Autonomous University of Zacatecas (UAZ) for the support provided for the use of the necessary infrastructure for the development of this project. [PERSON] thanks PRODEP for the support provided to carry out doctoral studies at the Autonomous University of Zacatecas. The authors declare that they have no competing interests. The following abbreviations are used in this manuscript: