Effect of Parasitic Element on the Characteristics of Microstrip Antenna

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Original languageEnglish
Pages (from-to)1247-1251
Journal / PublicationIEEE Transactions on Antennas and Propagation
Issue number8
Publication statusPublished - Aug 1991
Externally publishedYes


The variation of the size and position of a parasitic element with the input impedance and bandwidth of a stack rectangular microstrip antenna is investigated theoretically. An integral equation for the unknown patch current densities is formulated in the spectral domain. The Galerkin procedure is employed to solve for the solution. It is found that the input impedance varies significantly with the size and position of the parasitic patch. The result is important for bandwidth enhancement and impedance matching of the microstrip antenna. ©1991 IEEE