Communications: radio wave antennas – Antennas – Microstrip
Patent
1989-11-29
1990-12-25
Hille, Rolf
Communications: radio wave antennas
Antennas
Microstrip
343708, 343778, H01Q 138
Patent
active
049806920
ABSTRACT:
A circular array includes a plurality of antenna elements which are spaced apart from each other and situated in a conical arrangement and in parallel rows circumferentially about the longitudinal axis of the conical arrangement. The circumferential spacing between the phase centers of adjacent antenna elements of any one row situated closer to the base of the conical arrangement is greater than that of adjacent antenna elements situated relatively closer to the apex of the conical arrangement. The respective operating frequencies of the antenna elements of any one row situated closer to the base of the conical arrangment is lower than the operating frequencies of the antenna elements of any other row situated relatively closer to the apex. The circuit array antenna further includes a plurality of feed lines, where each feed line is coupled to an antenna element of each row in progression. The circumferential spacing between the phase centers of adjacent antenna elements of the conical arrangement is maintained at a fixed value of the wavelength of the operating frequencies of the antenna elements.
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Microstrip Antenna Array With Multi-Octave Bandwidth, Microwave Journal, Mar. 1986, by Peter S. Hall.
McVeigh Peter J.
Rudish Ronald M.
Ail Systems, Inc.
Hille Rolf
Le Hoang-anh
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