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Sociedade Brasileira de Telecomunicações

Multi-frequency Microstrip Antenna Using Defected Ground Structures With Band-Notched Characteristics


This paper presents a design of multi-frequency microstrip antenna using defected ground structure (DGS), etched structure on the ground plane, for C band and X band operations, with band-notched characteristics. Rogers RT/ DUROID 3006 substrate is used with dielectric constant 6.15 and loss tangent 0.0025. The proposed antenna resonates at 4.4 GHz, 6.3 GHz , 8.1GHz and 8.8 GHz and has band-notched characteristics at 4.4 - 6.2 GHz for wireless local area network (WLAN) applications (5.18–5.825 GHz), 6.5 - 8.0 GHz for X band satellite communication (7 - 8 GHz), 8.2 - 8.8 GHz for ITU 8 GHz application. A good agreement was observed between the simulated and measured results.

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