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Antenas planares e técnicas de miniaturização
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ISBN10: 6208351081
ISBN13: 9786208351083
Publisher: Edicoes Nosso Conhecimento
Published: Dec 4 2024
Pages: 148
Weight: 0.50
Height: 0.34 Width: 6.00 Depth: 9.00
Language: Portuguese
ISBN13: 9786208351083
Publisher: Edicoes Nosso Conhecimento
Published: Dec 4 2024
Pages: 148
Weight: 0.50
Height: 0.34 Width: 6.00 Depth: 9.00
Language: Portuguese
Neste livro, para miniaturizar antenas planares, utilizamos as seguintes técnicas: a primeira técnica consiste em carregar uma antena de ressonador dielétrico retangular (ARDR) com um material BST de muito alta permissividade dieléctrica, e estamos interessados na modelação e análise electromagnética da antena antes e depois do empilhamento com este material. A antena proposta funciona a cerca de 2,31 GHz e tem uma largura de banda de impedância de 20 MHz. A segunda técnica de miniaturização utilizada é a estrutura de defeito do plano de terra (GDS), em que foram fabricadas duas antenas de microfita; a primeira antena tem uma largura de banda estreita (272 MHz), enquanto a segunda, que tem uma área de contacto mais pequena e uma dimensão total de 10 × 6 mm , tem uma largura de banda larga (superior a 1 GHz). Para validar os resultados numéricos, foram efectuadas medições, com resultados satisfatórios. Os três projectos discutidos demonstram claramente a importância destas duas técnicas na miniaturização de antenas planares.
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