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Projecto e implementação de uma antena monopolar com DGS para a banda ISM
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ISBN10: 620595740X
ISBN13: 9786205957400
Publisher: Edicoes Nosso Conhecimento
Published: Apr 30 2023
Pages: 112
Weight: 0.39
Height: 0.27 Width: 6.00 Depth: 9.00
Language: Portuguese
ISBN13: 9786205957400
Publisher: Edicoes Nosso Conhecimento
Published: Apr 30 2023
Pages: 112
Weight: 0.39
Height: 0.27 Width: 6.00 Depth: 9.00
Language: Portuguese
Uma nova antena monopolar compacta impressa foi projetada em substrato FR4 para cobrir a banda científica industrial (ISM) em 2,45GHz. Nesta documentação são concebidos dois modelos de antena monopolar. O modelo de antena 1 tem radiadores simétricos e elementos parasitas que são carregados paralelamente e terra em forma de T que é invertido. A antena apresenta a natureza de banda dupla e exibe as frequências de ressonância a 2,5 GHz e 4,2 GHz. Quando a antena é colocada no modelo de fantoma de três camadas, constituído por pele, gordura e músculo, entra em ressonância a 2,5 GHz. O modelo de antena 2 é constituído por um plano de terra em forma de T que funciona como reflector. A concepção da antena reconfigurável em frequência é alimentada por uma linha de transmissão de microfita que utiliza díodos PIN economicamente disponíveis. A antena sugerida pode funcionar em aplicações de telemetria e WiMAX com frequências ressonantes de 1,4 GHz e 3,6 GHz. A comutação de frequências é conseguida através do posicionamento conveniente dos díodos PIN no patch. A antena construída apresenta uma boa perda de retorno (S11
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