IMPLEMENTATION OF PHYSICAL OPTICS ANALYSIS OF SPIRAL ANTENNA RADIATIONS IN THE PRESENCE OF BOR RADOME STRUCTURE FOR THE APPLICATION OF DIRECTION FINDING

摘要

A practical physical optics (PO) implementation procedure is employed to study the radiations of multi-arm spiral antennas in the presence of a body of revolution (BOR) radome structure in direction finding applications. This procedure potentially simplifies the geometrical optics ray tracing procedure based on characteristics of spiral antennas, which is required to define the equivalent currents of PO, and provides efficient formulations to compute the radiation fields due to PO currents that are equivalent to the radiation of spiral antennas in the presence of the same type radome structure.