Estudo de antenas patches de microfita miniaturizadas em banda larga para aplicação em dispositivos móveis e portáteis

摘要

This work presents techniques used to design and manufacture microstrip patchantennas for applications in portable and mobile devices. To do so, are evaluatedseveral factors that can influence the performance of microstrip patch antennas.Miniaturization techniques are studied and employed in order to apply this type ofantenna in mobile and / or mobile.The theories of microstrip patch antennas are addressed by analyzing characteristicssuch as constitution, kinds of patches, substrates, feeding methods, analysis methods,the main advantages and disadvantages and others.Techniques for obtaining broadband microstrip patch antennas were surveyed inliterature and exemplified mainly by means of simulations and measurements. Forsimulations of the antennas was used the commercial software .In addition, antenna miniaturization techniques have been studied as a main concernthe fundamental limits of antennas with special attention to electrically small antennasbecause they are directly linked to the microstrip patch antennas.Five design antennas are proposed to demonstrate the effectiveness of techniquesused to obtain the microstrip patch antennas broadband and miniaturized for use inmobile devices and/or portable. For this, the proposed antennas were simulated, builtand measured. The antennas are proposed to be used in modern systems of wirelesscommunications such as DTV, GPS, IEEE 802.16, IEEE 802.11, etc. The simulations ofthe antennas were made in business and computer programs. The measured resultswere obtained with a parser Vector of networks of the Rhode and Schwarz model ZVB14