Communications: radio wave antennas – Antennas – Balanced doublet - centerfed
Patent
1991-07-30
1996-05-14
Hajec, Donald T.
Communications: radio wave antennas
Antennas
Balanced doublet - centerfed
343895, 3437925, H01Q 916, H01Q 136, H01Q 1110
Patent
active
055172067
ABSTRACT:
An antenna structure is provided having one or more spiral antenna arms extending outwardly from a lateral center axis. Each arm is defined by an antenna element disposed in a zig-zag configuration to provide reactive loading to the arm, wherein each arm receives or transmits radio frequency waves about a longitudinal center axis of the arm and the zig-zag element configuration. Thus, the antenna structure has a broader bandwidth than other antennas requiring the same amount of space. The antenna structure also has a substantially omni-directional radiation pattern and a low profile. Each antenna element can be metallisation disposed on a support structure or can be one or more cable conductors. A feed means is provided which can be connected to the elements proximate to the lateral center axis and positioned along or coincident with the longitudinal center axis of one arm or can be connected to one of the elements distal to the lateral center axis. In both methods of feeding the antenna arms, the antenna elements function as part of an infinite balun. In one application, the antenna structure is secured within the non-metallic roof structure of an automobile.
REFERENCES:
patent: 1910147 (1933-05-01), Bruce
patent: 2759183 (1956-08-01), Woodward, Jr.
patent: 3019439 (1962-01-01), Reis et al.
patent: 3039099 (1962-06-01), Chait et al.
patent: 3106714 (1963-10-01), Minerva
patent: 3231894 (1966-01-01), Nagai
patent: 3355740 (1967-11-01), Mayes
patent: 3454951 (1969-07-01), Patterson et al.
patent: 3465346 (1969-09-01), Patterson et al.
patent: 3521289 (1970-07-01), Mayes et al.
patent: 3573840 (1971-04-01), Gouillou
patent: 3745585 (1973-07-01), Barbano
patent: 4038662 (1977-07-01), Turner
patent: 4243993 (1981-01-01), Lamberty et al.
patent: 4381566 (1983-04-01), Kane
patent: 4644366 (1987-02-01), Scholz
patent: 4742359 (1988-05-01), Ishino et al.
patent: 4835541 (1989-05-01), Johnson et al.
patent: 5313216 (1994-05-01), Wang et al.
Chapter 14 of the Antenna Engineering Handbook by Johnson and Jasik, 2nd Edition (McGraw-Hill, 1984) entitled "Frequency-Independent Antennas" by DuHamel and Chadwick.
Boone Theresa C.
Johnson Russell W.
Lalezari Farzin
Alberding Gilbert E.
Ball Corporation
Hajec Donald T.
Ho Tan
LandOfFree
Broad band antenna structure does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Broad band antenna structure, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Broad band antenna structure will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1899220