Multiple omnidirectional antenna
First Claim
1. An omnidirectional end antenna which forms an assembly with one or more other antennas mounted on a common axis comprising a wave shaping base plate member (10, 21, 46), a coaxial feed line having an outer conductor (8, 19, 41) attached to said base plate member (10, 21, 46) on one side thereof and extending through said one or more other antennas, an opening formed in said base plate member, an inner conductor (8a, 19a, 44) of said feed line extending for a finite length through said opening formed in said base plate member (10, 21,46), a cylindrical shaped radiating member (6, 17, 42) into which the end of feed line extends attached to the second side of said base plate member (10, 21, 46) and formed with a short circuit cover member (11, 23, 49) over its remote end, and at least one radiating slot (7, 14, 43) formed in the side walls for radiating radiant energy.
1 Assignment
0 Petitions
Accused Products
Abstract
A multiple omnidirectional antenna, utilizing individual antennae for different frequencies, and/or different polarizations, disposed along a common axis, and employing a multiple coaxial feed from one side only, in which the omnidirectional antenna which is remote from the feed side, is in the form of an axial wave-guide section, with the portion defining the walls thereof being connected to the outer conductor of the innermost coaxial feed line, and at least, in effect, defining at least one slot therein which runs transversely to the desired polarization direction of such antenna, with the inner conductor of the innermost coaxial feed line forming the exciting element therefor and projecting into the interior of said wave-guide, and/or at least one other omnidirectional antenna in the form of a coaxial line section, the walls of which are connected to the outer conductor of another coaxial feed line, and are provided with at least one slot therein which runs transversely to the desired polarization direction of said antenna, with the inner conductor of such other coaxial line passing through the interior of said coaxial line section. Combinations of horizontal, vertical and circular polarizations may be employed.
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Citations
5 Claims
- 1. An omnidirectional end antenna which forms an assembly with one or more other antennas mounted on a common axis comprising a wave shaping base plate member (10, 21, 46), a coaxial feed line having an outer conductor (8, 19, 41) attached to said base plate member (10, 21, 46) on one side thereof and extending through said one or more other antennas, an opening formed in said base plate member, an inner conductor (8a, 19a, 44) of said feed line extending for a finite length through said opening formed in said base plate member (10, 21,46), a cylindrical shaped radiating member (6, 17, 42) into which the end of feed line extends attached to the second side of said base plate member (10, 21, 46) and formed with a short circuit cover member (11, 23, 49) over its remote end, and at least one radiating slot (7, 14, 43) formed in the side walls for radiating radiant energy.
Specification