Trabalho de Conclusão de Curso de Graduação
Projeto e desenvolvimento de uma ULA com quatro elementos em microfita para aplicação em RTLS
Fecha
2023-02-03Registro en:
GUEVARA, Y. A. Projeto e desenvolvimento de uma ULA com quatro elementos em microfita para aplicação em RTLS. 2023. 44 [4] p. Trabalho de Conclusão de Curso (Graduação em Engenharia de Telecomunicações)- Universidade Federal de Santa Maria, Santa Maria, RS, 2023.
Autor
Guevara, Yunior Alcantara
Institución
Resumen
This work presents the design of a Uniform Linear Antenna that operates in the Bluetooth frequency
range; and the initial stage of signal processing to determine AoA in RTLS applications.
The project aims to serve as a basis for other more complex implementations. The ULA assembly
consists of four copper patch elements with a thickness of 35 mm, arranged at a spacing of
0.35l on a 1.5 mm dielectric of fiberglass and epoxy resin tall. The array operates satisfactorily
in the corresponding band between the frequencies 2402 MHz and 2480 MHz; the polarization
of each element is circular, obtained by means of cuts in the corners of one of the diagonals
of the patch, which allows the reception of the signal from emitters with linear polarization,
regardless of its orientation; the power supply of the elements is individual, carried out by means
of coaxial connectors and occurs when their internal conductor crosses the dielectric and
is connected directly to the patchs; the set is unidirectional with forward pointing, having a
maximum gain per element of 3.35 dB and a half power angle of 94◦. In the project presented
here, the antenna is only used in the receiving function, but it can be used for transmission. The
system is designed to operate at a characteristic impedance of 50Ω, which is currently the most
widely used universal standard. Using the Ansys HFSS software and the MUSIC algorithm, the
required signal incidence angle for RTLS was estimated from 0◦ to 180◦. This work is based on
the theoretical knowledge available in the bibliography, personal contributions, results obtained
through simulation and the measurements carried out in the tests carried out on the antenna
prototype.