WIDEBAND COMPACT DIPOLE MANPACK ANTENNA

摘要

An compact manpack format antenna operating over a broad bandwidth. In one arrangement, the antenna is formed from a set of five hollow cylindrical conductive elements. Several cylinders provide, for example, a VHF/UHF radiator section and other cylinders form an L-band radiator section. A bottom leg of the L-band section operates as part of the VHF/UHF section via coupling between that lower L-band leg and the VHF/UHF section. This coupling arrangement reduces the required overall physical length of the antenna.

主权项

1. An antenna apparatus comprising:
at least five cylindrical sections disposed adjacent one another along a common axis, each cylindrical section having a conductive outer surface; two or more of the cylindrical sections being a first type cylindrical section resonant within a first frequency band; two of the cylindrical sections being a second type cylindrical section resonant within a second frequency band; a first band feed having a center conductor and an outer conductor, the center conductor coupled to one of the first type cylindrical sections and the outer conductor coupled to both (a) a feed point on one of the first type cylindrical sections and (b) a feed point one of the second type cylindrical sections; a second band feed having a center conductor and an outer conductor, the center conductor coupled to a feed point on one of the second type of cylindrical sections, and the outer conductor coupled to a feed point on one of the first type of cylindrical sections; and a filter disposed between a selected one of the first type cylindrical sections and the first band feed.