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Image of the Printed rectangular spiral. |
The printed rectangular spiral antenna is a wide band, circularly polarized antenna. The antenna properties are comparable with those of the Archimedean spiral antenna. This geometry is favored above that of the Archimedean spiral in situations where the object on which the antenna is to be mounted is square, since it utilizes the area optimally, at the cost of more uneven performance across wide bandwidths. If space is at a premium, the ends of the arms are sometimes terminated with loads to compensate for the end reflections at low frequency operation. Typical applications of this antenna include Electronic warfare (EW) systems.
Various methods have been suggested to overcome the limitation bandwidth of microstip antennas, including the use of gap- or direct-coupled parasitic patches. In the FEGCOMA, these parasitic patches are placed alongside all four edges of the driven patch...
The Corrugated pyramidal horn is a variation of the standard Pyramidal horn. The addition of corrugations to the standard pyramidal horn improves the back and sidelobe level performance. Higher back- and sidelobe levels result from energy diffracted by...
The standard rectangular patch forms the basis for a number of antenna variations, typically introduced to overcome a particular shortcoming of the standard structure. One approach to reduce the size of a patch antenna involves removing a rectangular...
The horn antenna designed here makes use of quad ridges with two orthogonal feeds to achieve this dual polarization. The feeding structure has the advantage of being able to support a fundamental propagation mode polarized in either of two orthogonal...
The antenna consists of an axisymmetric parabolic reflector and a metallic cylindrical shroud which extends from the rim of the reflector dish. The physical feed antenna is substituted by a theoretical / simulated / measured pattern, simplifying the overall...