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An equiangular spiral antenna backed by a cavity is investigated using the electric and magnetic fields obtained using Yeepsilas FDTD method. Strip absorbers are placed inside the cavity. Antenna configuration parameters other than the cavity height Hcav are fixed throughout this paper, where the cavity diameter Dcav is chosen to be 120 mm (slightly larger than the antenna diameter of 113 mm). The...
This paper presents a PSP (patch with a ring slot and conducting pins) antenna. Using the FDTD method, the PSP antenna is designed to radiate a linearly polarized conical beam over a wide frequency range. The design is performed in three steps. In the first step, a center-fed patch above a ground plate, referred to as the original patch, is analyzed. It is found that the reactive component of the...
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