Plane Wave Expansion for Arrays of Dipoles or Slots in Presence of Dielectric Slabs.
OHIO STATE UNIV COLUMBUS ELECTROSCIENCE LAB
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The report presents the admittance properties of slot arrays in the presence of dielectric layers. The work relates to the design of metallic radomes. The report discusses the admittance properties of slot arrays in the presence of dielectric layers as a stepping stone to the transmission properties. These admittance properties are also applicable to phased arrays. In particular, the admittance is shown here to be almost independent of scan angle up to plus or minus 70 degrees in the E-, H- and 45 degree plane. This was obtained by proper use of dielectric layers mounted adjacent to the slotted surface. The presence of surface waves is also investigated, and ways to avoid them are pointed out. Finally, the effect of a semi-infinite dielectric media upon an array of dipoles is determined.
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