Multi-element antenna with tapered resistive loading in each element
First Claim
1. An antenna comprisinglinear elements each having a base end and a distal end, the base ends of said linear elements being connected directly together and directly to a conductor of a transmission line, said linear elements being disposed about a median axis of said antenna and diverging outward from their base ends relative to said median axis, each of said linear elements having a resistance that varies non-linearly and essentially continuously along its length, said linear elements having essentially the same non-linearly and essentially continuously varying tapered resistive loading along their lengths and essentially the same impedances, anda ground plane lying in a plane essentially normal to the median axis of said antenna, the ground plane being connected to another conductor of said transmission line so that said linear elements are fed in a common mode relative to the ground plane,the linear elements together effecting a low standing wave ratio, a wide bandwidth achieved other than by differences in the impedances of the linear elements, and an omnidirectional radiation pattern.
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Abstract
An antenna having efficient operation over a wide bandwidth, a low standing wave ratio and constant radiation characteristics over a wide bandwidth includes in one embodiment a set of four linear elements of substantially the same length. Each linear element has a base end and a distal end. The base ends are coupled together and adapted to be connected to a transmission line which is adapted to be connected to a communication device. The linear elements are disposed about the median axis of the antenna and diverge outward from their base ends relative to the median axis. Each linear element has continuous tapered resistive loading along its length. In another version of the invention each linear element is made up of a plurality of conducting elements interconnected by discrete resistive devices.
55 Citations
13 Claims
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1. An antenna comprising
linear elements each having a base end and a distal end, the base ends of said linear elements being connected directly together and directly to a conductor of a transmission line, said linear elements being disposed about a median axis of said antenna and diverging outward from their base ends relative to said median axis, each of said linear elements having a resistance that varies non-linearly and essentially continuously along its length, said linear elements having essentially the same non-linearly and essentially continuously varying tapered resistive loading along their lengths and essentially the same impedances, and a ground plane lying in a plane essentially normal to the median axis of said antenna, the ground plane being connected to another conductor of said transmission line so that said linear elements are fed in a common mode relative to the ground plane, the linear elements together effecting a low standing wave ratio, a wide bandwidth achieved other than by differences in the impedances of the linear elements, and an omnidirectional radiation pattern.
Specification
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Current AssigneeGlynda O. Benham
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Original AssigneeGlynda O. Benham
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InventorsBenham, Glynda O.
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Primary Examiner(s)Wimer, Michael C.
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Application NumberUS08/445,910Time in Patent Office771 DaysField of Search343/745, 343/826, 343/750, 343/873, 343/846, 343/731US Class Current343/826CPC Class CodesH01Q 9/44 with a plurality of diverge...
