doctoralThesis
Antena bow-tie integrada a uma FSS refletora para aplicações em sistemas 5G
Fecha
2021-02-02Registro en:
BRITO, Augusto César Rebouças de. Antena bow-tie integrada a uma FSS refletora para aplicações em sistemas 5G. 2021. 99f. Tese (Doutorado em Engenharia Elétrica e de Computação) - Centro de Tecnologia, Universidade Federal do Rio Grande do Norte, Natal, 2021.
Autor
Brito, Augusto César Rebouças de
Resumen
In recent years, the advances observed in wireless communication systems and the
growth in the number of their applications have made the use of compact multiband and
broadband antennas attractive, both for applications in commercial and military
communications systems. The most common examples are found in the variety of
portable wireless communication devices, such as: smartphones, headsets and portable
computers, among others. The emergence of different wireless technologies, such as
GSM (Global System for Mobile Communications), RFID (Radio Frequency
Identification), Bluetooth, Wi-Fi and WiMAX, has served as a motivation to boost
research in the telecommunications area. In this way, the search for lighter, more compact
and low-cost devices, to be used in several areas, such as biomedical, military and
security, has been increasingly greater. In addition, the constant search for increasingly
lighter and more flexible antennas, which can be molded to the contact surface of
devices, has boosted research in the area. In this respect, the microwaveable antennas
stand out, as they have the ability to communicate with various devices, they are simple,
inexpensive, light, with a thin profile and depending on the application they have a large
bandwidth. The development of antennas with these characteristics is still a challenge to
current research. This work aims to study, design, manufacture and measure new
geometries of planar antennas, with openings in the ground plane and use of FSS
(Frequency Selective Surface), aiming to reduce its dimensions, volume and weight as
well as an increase in the gain of the antennas, to meet the demands of the services
offered by the 5G Mobile Systems, for example. The analysis of a microwaveable
antenna with a bow-tie slit in its ground plane is highlighted, with results for loss of
return, bandwidth, current distribution and radiation diagram for a frequency range
between 1 and 10 GHz. The insertion of air layers between the antenna and the FSS
structure was also used aiming at a greater degree of freedom to adjust the resonance
frequencies. Computer simulations in order to predict the values of the parameters that
characterize the proposed structures were performed mainly using the HFSS 13.0
software and results in the laboratory showed excellent agreement.