Communications: radio wave antennas – Antennas – Active sleeve surrounds feed line
Patent
1991-09-27
1994-05-10
Wimer, Michael C.
Communications: radio wave antennas
Antennas
Active sleeve surrounds feed line
343715, H01Q 502, H01Q 918
Patent
active
053112016
ABSTRACT:
A multi-band antenna includes conductive tubular section that provides the major physical support for the antenna and functions as the major element of the antenna on the long wavelength band and a half wavelength center feed dipole with a choke located at the end of the tubular section that serves and the short wavelength antenna. The half wavelength dipole includes a coaxial cable disposed within the tubular section extending a quarter wavelength of the short wavelength band beyond the tubular section. A solid conductor of a quarter wavelength forms an extension of the central conductor of the coaxial cable. A rigid dielectric cylinder accommodates the extension of the coaxial cable and the solid conductor providing physical support and rigidity. A choke includes a short between the outer conductive shield of the coaxial cable and the tubular section is located one quarter wavelength from the remote end of the tubular section. In addition, the length of the insertion section of the dielectric cylinder into the tubular section provides tuning. The outside diameters of the tubular section and the dielectric cylinder are the same allowing permits a conformal coating to cover the tubular section and the dielectric cylinder. This conformal coating provides environmental protection and makes the antenna visually similar to the prior art whip antenna.
REFERENCES:
patent: 3139620 (1964-06-01), Leidy et al.
patent: 3576578 (1971-04-01), Harper
patent: 3680131 (1972-07-01), Hall et al.
patent: 4352109 (1982-09-01), Reynolds
patent: 4647941 (1987-03-01), Myer
patent: 4725846 (1988-02-01), Hendershot
patent: 4734703 (1988-03-01), Nakase et al.
patent: 4748450 (1988-05-01), Hines et al.
patent: 5079562 (1992-01-01), Yarsunas et al.
Liepa Valdis V.
Lillie Michael R.
Tri-Band Technologies, Inc.
Wimer Michael C.
LandOfFree
Multi-band antenna does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Multi-band antenna, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Multi-band antenna will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2415043