Communications: radio wave antennas – Antennas – Balanced doublet - centerfed
Patent
1977-12-23
1981-09-15
Moore, David K.
Communications: radio wave antennas
Antennas
Balanced doublet - centerfed
343815, 343834, 343833, H01Q 1930
Patent
active
042900719
ABSTRACT:
A multi-band multi-element directional antenna array having a driven element and at least one parasitic element with a network at the center of each element interconnecting element opposite side radiators. While some of these would be a driven element and either a reflector or director parasitic element array most applications call for at least three elements, a driven element, a reflector element and a director element, and for some applications, additional parasitic director elements are added. While antenna arrays embodying features hereof may be adapted as two band f.sub.1 f.sub.2, f.sub.2 f.sub.3, or f.sub.1 f.sub.3 antenna arrays, primary useage would be in a three radio band f.sub.1, f.sub.2, f.sub.3 version with band nominal center frequencies related, approximately by the progression 1, 1.5, 2 (example 14, 21, and 28 MHz). Reflector and director elements with their center networks as parasitic elements are structured to resonate at frequencies up to ten percent displaced from respective band operating frequencies--reflector elements at lower frequencies and directors at higher frequencies. Some of the arrays employ folded elements for improved unidirectional radiation patterns and structural advantages.
REFERENCES:
patent: 3996592 (1976-12-01), Kline et al.
patent: 4122447 (1978-10-01), Kawai et al.
patent: 4145694 (1979-03-01), Sletten
Electrospace Systems, Inc.
Kintzinger Warren H.
Moore David K.
LandOfFree
Multi-band directional 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 directional antenna, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Multi-band directional antenna will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-393215