Interleaved crossed-slot and patch array antenna for dual-frequency and dual polarization, with multilayer transmission-line feed network
First Claim
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1. A crossed slot antenna arrangement, comprising:
- a first ground plane having radiating and nonradiating broad sides, said first ground plane defining a crossed slot having first and second mutually orthogonal linear slots, each of which slots includes a first and second portion;
a first electrically conductive feed lying parallel with said first ground plane and adjacent said nonradiating side of said first ground plane, and extending across said first portion of said first linear slot for excitation thereof;
a first dielectric layer lying between said nonradiating side of said first ground plane and said first electrically conductive feed, whereby said first electrically conductive feed takes the general form of a first transmission-line structure;
a second electrically conductive feed lying parallel with said first ground plane and extending across said first portion of said second linear slot for excitation thereof;
a second ground layer lying between said second electrically conductive feed and said first electrically conductive feed, thereby providing a second ground plane for said first transmission-line structure, and whereby said second electrically conductive feed takes on the form of a second transmission-line structure;
a second dielectric layer lying between said between said second electrically conductive feed and said second ground layer;
a third ground plane extending parallel with said first ground plane, adjacent to said second electrically conductive feed, at a location remote from said second dielectric layer, for thereby providing a second ground plane for said second transmission-line structure; and
electrically conductive interconnection means coupled to at least said first portion of said second linear slot and to said third ground plane, without contacting said first and second electrically conductive feeds, for electrically interconnecting said second linear slot with said second transmission-line structure.
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Abstract
A crossed-slot antenna in a first ground plane has a first feed, in stripline form including a second ground plane, which underlies a portion of one of the orthogonal slots for exciting a first polarization. A conductive lip of the other slot extends through the plane of the first feed, and opens through the second ground plane. A second feed includes conductors underlying the extended other slot. In a preferred embodiment, the feeds for the first and second slots are balanced. In a particularly advantageous embodiment, an array of such crossed slots is co-located with an array of enhanced-gain patch antennas.
115 Citations
7 Claims
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1. A crossed slot antenna arrangement, comprising:
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a first ground plane having radiating and nonradiating broad sides, said first ground plane defining a crossed slot having first and second mutually orthogonal linear slots, each of which slots includes a first and second portion;
a first electrically conductive feed lying parallel with said first ground plane and adjacent said nonradiating side of said first ground plane, and extending across said first portion of said first linear slot for excitation thereof;
a first dielectric layer lying between said nonradiating side of said first ground plane and said first electrically conductive feed, whereby said first electrically conductive feed takes the general form of a first transmission-line structure;
a second electrically conductive feed lying parallel with said first ground plane and extending across said first portion of said second linear slot for excitation thereof;
a second ground layer lying between said second electrically conductive feed and said first electrically conductive feed, thereby providing a second ground plane for said first transmission-line structure, and whereby said second electrically conductive feed takes on the form of a second transmission-line structure;
a second dielectric layer lying between said between said second electrically conductive feed and said second ground layer;
a third ground plane extending parallel with said first ground plane, adjacent to said second electrically conductive feed, at a location remote from said second dielectric layer, for thereby providing a second ground plane for said second transmission-line structure; and
electrically conductive interconnection means coupled to at least said first portion of said second linear slot and to said third ground plane, without contacting said first and second electrically conductive feeds, for electrically interconnecting said second linear slot with said second transmission-line structure. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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Specification
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Current AssigneeLockheed Martin Corporation (Martin Marietta Corporation)
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Original AssigneeLockheed Martin Corporation (Martin Marietta Corporation)
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InventorsLier, Erik
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Primary Examiner(s)Ho, Tan
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Application NumberUS09/496,524Time in Patent Office482 DaysField of Search343/767, 343/770, 343/700 MS, 343/846US Class Current343/770CPC Class CodesH01Q 13/10 Resonant slot antennasH01Q 21/064 using horn or slot aerials ...H01Q 21/065 Patch antenna arrayH01Q 21/24 Combinations of antenna uni...H01Q 5/42 using two or more imbricate...
