Communications: radio wave antennas – Antennas – Balanced doublet - centerfed
Patent
1993-11-02
1995-08-08
Wimer, Michael C.
Communications: radio wave antennas
Antennas
Balanced doublet - centerfed
343815, 343822, 343861, 343882, 342375, H01Q 320, H01Q 330, H01Q 2112
Patent
active
054403189
ABSTRACT:
A panel antenna suitable for use in cellular communication applications provided with means for mechanically and electrically adjusting the tilt of the antenna beam. Electrical down tilt being achieved by varying the length of a first feed line to a group of dipole pairs. Mechanical down tilting of the antenna beam being achieved by tilting the antenna ground plane and dipole driver assembly with respect to a housing.
REFERENCES:
patent: 2462881 (1949-03-01), Marchetti
patent: 2533054 (1950-12-01), Schouten
patent: 3249946 (1966-05-01), Flanagan
patent: 3747114 (1973-07-01), Shyhalla
patent: 3750185 (1973-07-01), Evans
patent: 3887925 (1975-06-01), Ranghelli et al.
patent: 4563687 (1986-01-01), Berger
patent: 4710778 (1987-12-01), Radov
patent: 4843402 (1989-06-01), Clement
patent: 5012256 (1991-04-01), Maddocks
Yoshihide and Kijima, "Low sidelobe and tilted beam base station antennas for smaller cell systems," (IEEE pp. 138-141, 1989).
Butland Roger J.
Heinz William E.
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