Communications: radio wave antennas – Antennas – Slot type
Patent
1989-07-24
1991-02-19
Hille, Rolf
Communications: radio wave antennas
Antennas
Slot type
343746, 343769, H01Q 13100, H01Q 13120
Patent
active
049948172
ABSTRACT:
An inexpensive, efficient, broadband, slot-type antenna with unidirectional sensitivity includes a slot-forming means defining a plurality of substantially concentric and generally coplanar annular slots and a non-resonant antenna connection means for transmitting electromagnetic energy to and from the plurality of annular slots. The antenna connection means forms a plurality of non-resonant, radially-extending cavities that are adapted to combine electromagnetic energy received at the plurality of concentric, annular slots substantially in phase and to divide electromagnetic energy between the plurality of concentric, annular slots for transmission from the slots generally in phase and along the central slot axis that lies perpendicular to the two concentric, annular, coplanar slots. The antenna may also include a plurality of polarizing antenna elements carried by the slot-forming means adjacent at least one or two of the substantially concentric, annular slots to enhance the unidirectional sensitivity of the antenna. Such a plurality of polarizers may be carried by the slot-forming means in a plurality of locations spaced above and over at least one or two of the concentric annular slots and oriented and distributed around their peripheries at locations to correct for variations to polarity and to suppress cross-polarization to and from the antenna.
REFERENCES:
patent: 2791769 (1957-05-01), Lindenblad
patent: 2834959 (1958-05-01), Dorne
patent: 2838754 (1958-06-01), Bickmore
patent: 4208660 (1980-06-01), McOwen, Jr.
patent: 4242685 (1980-12-01), Sanford
patent: 4320402 (1982-03-01), Bowen
patent: 4684953 (1987-08-01), Hall
patent: 4803494 (1989-02-01), Norris et al.
patent: 4819003 (1989-04-01), Goto et al.
patent: 4821040 (1989-04-01), Johnson et al.
Munson Robert E.
Schnetzer Michel W.
Alberding Gilbert E.
Ball Corporation
Brown Peter Toby
Hille Rolf
LandOfFree
Annular slot 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 Annular slot antenna, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Annular slot antenna will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1146927