Communications: radio wave antennas – Antennas – Balanced doublet - centerfed
Patent
1997-07-10
1999-11-30
Wimer, Michael C.
Communications: radio wave antennas
Antennas
Balanced doublet - centerfed
343817, 343819, H01Q 2112
Patent
active
059950617
ABSTRACT:
A no-loss, multi-band, adaptable Yagi style antenna employs a multi-element driven cell having a center element and one or more adjacent elements on each side of the center element. The adjacent elements of the driven cell are electrically shorter than the center element, thereby permitting the driven cell to be tuned to two or more frequency bands. The antenna is fed by a feedline connected to a common feed point at the center of the center element in the driven cell. Parasitic director elements are positioned in front of the driven cell and are tuned to the highest band of the driven cell. Parasitic reflector elements for one or more frequency bands are positioned behind the driven cell, with these elements tuned to actual operating frequencies of the antenna. The invention also provides a multi-band dipole antenna array covering three or more frequency bands comprising a set of dipole elements having a center element and one or more adjacent elements and one or more adjacent elements on each side of the center element. The adjacent elements are electrically shorter than the center element and are of unequal lengths. The antenna is fed by a feedline connected to a common feedpoint at the center of the center element of the set of dipole elements. Parasitic director elements are positioned in front of the set of dipole elements and parasitic reflector elements are positioned behind the set of dipole elements.
REFERENCES:
patent: Re24413 (1958-01-01), Weiss
patent: 2897497 (1959-07-01), Finneburgh
patent: 4604628 (1986-08-01), Cox
patent: 5061944 (1991-10-01), Powers et al.
Leeson, David B., "Physical Design of Yagi Antennas", The American Radio Relay League; Publ. No. 151 (1992), pp. 11-70-11-73.
The American Radio Relay League, "The ARRL Antenna Book", The American Radio Relay League; Publ. No. 15 (1988), pp. 7-4-7-8.
Moxon, L.A., "HF Antennas for all Locations", Radio Society of Great Britain (1982), pp. 106-120.
LandOfFree
No loss, multi-band, adaptable 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 No loss, multi-band, adaptable antenna, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and No loss, multi-band, adaptable antenna will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1678673