Communications: radio wave antennas – Antennas – With polarization filter or converter
Patent
1990-05-17
1991-08-06
Wimer, Michael C.
Communications: radio wave antennas
Antennas
With polarization filter or converter
343772, 343785, 343833, 343834, H01Q 1302, H01Q 1922
Patent
active
050381520
ABSTRACT:
A broad band omnidirectional monocone antenna 10 having a wide operative frequency spectrum and a large elevation angle A is disclosed herein. The antenna 10 of the present invention includes an input circular waveguide network 12 and 18 for providing electromagnetic energy of at least one polarization. Coupled to the circular waveguide network 12 and 18 is a dielectric-loaded waveguide arrangement 22 for projecting a first electromagnetic beam. The inventive antenna 10 further includes a parasitic element network 32, 34, and 36 positioned in the path of the first beam. The parasitic element network 32, 34, and 36 is disposed to form a parasitic beam in response to the first beam. In a particular embodiment of the inventive antenna 10 a beam shaping cone 40 circumscribes the dielectric waveguide arrangement 22. The cone 40 is adapted to augment the elevation angle A characterizing the antenna 10 of the present invention by redirecting the parasitic beam.
REFERENCES:
patent: 2588610 (1952-03-01), Boothroyd et al.
patent: 2645769 (1953-07-01), Roberts
patent: 3087157 (1963-04-01), Bogner
patent: 4274097 (1981-06-01), Krall et al.
Kroupa Gregory D.
Perpall Robert C.
Wong Mon N.
Wong Samuel S.
Denson-Low Wanda K.
Hughes Aircraft Company
Mitchell Steven M.
Westerlund Robert A.
Wimer Michael C.
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