Communications: radio wave antennas – Antennas – With vehicle
Patent
1978-11-16
1980-09-16
Lieberman, Eli
Communications: radio wave antennas
Antennas
With vehicle
343749, H01Q 132
Patent
active
042233143
ABSTRACT:
An antenna for receiving AM and FM radio frequency transmissions and for receiving and transmitting CB radio transmissions. The antenna includes a base, a generally elongate lower antenna section, and a generally elongate upper antenna section. The base is adapted to be mounted on an automobile and connected to the body of the automobile and to the outer conductor of a conventional automobile radio coaxial cable. The lower antenna section is attached to and extends above the base but is insulated therefrom. The electrical length of the lower section is selected to maximize reception of FM radio transmissions, the electrical length and the axial length of the lower section being substantially the same. The lower section is adapted to be connected to the inner conductor of the coaxial cable. The upper antenna section extends above the upper end of the lower section and includes a concealed loading coil electrically connected to the lower section. The cross section of the upper section is substantially the same as that of the upper end of the lower section and the silhouette of the antenna is substantially unbroken where the upper section meets the lower section. The loading coil has a sufficient number of turns to make the electrical length of the antenna at a preselected CB tuning frequency one-quarter of a wavelength. The impedance of the loading coil is such that the electrical length of the antenna at FM frequencies is substantially the same as that of the lower portion alone.
REFERENCES:
patent: 2966679 (1960-12-01), Harris
patent: 3102268 (1963-08-01), Foley
patent: 3541554 (1970-11-01), Shirey
patent: 4095229 (1978-06-01), Elliott
patent: 4097867 (1978-06-01), Eroncig
Tyrey Elasco A.
Tyrey Rosemary C.
LandOfFree
AM-FM and CB 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 AM-FM and CB antenna, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and AM-FM and CB antenna will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-543155