Diseño e implementación de un set de divisores de potencia y filtros en las bandas de GSM y LTE, para el laboratorio de la FIE-ESPOCH.

Abstract

The objective of this curricular integration work was to design and implement a set of power dividers and filters in the GSM and LTE bands using Microstrip technology, to the communications and microwave laboratory of the FIE-ESPOCH. The technical project was aimed to teachers and students for the execution of laboratory practices that contribute in the teaching-learning process. Through bibliographic research, it was studied the both theoretical and practical fundamentals of power dividers and filters to support the appropriate development of curricular integration work. The set was consisted of six Wilkinson power dividers and twelve bandpass filters operating in the GSM and LTE of Ecuador, in the frequencies of 700MHz, 850MHz, 1900MHz, AWS 1700/2100MHz and 2.5GHz. The materials selected for the implementation of these devices were FR4 and Rogers RO4003C, the FR4 was used for the frequencies described above while the Rogers RO4003C was only used for the 2.5GHz band, it was in order to compare that material offers better results. The power dividers and filters were designed in the Ansoft Designer software and printing the tracks went through the development process, to the Input and output of each divider and filter were soldered to 50Ω female SMA connectors. Made the tests and measurements of the devices of the set, acceptable and favorable results were obtained despite the fact that there was an undesired shift in frequency predicted from the simulation; this effect was due to the characteristics of the materials, homemade implementation and errors in the measuring equipment. In the dividers it should be considered that having more output ports increases insertion losses, while filters are recommended to be designed in odd order.