Antenna arrays using long slot apertures and balanced feeds
First Claim
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1. A dual polarization antenna array, comprising:
- a first array of continuous slots formed in a ground plane structure;
a second array of continuous slots formed in the ground plane structure, said second array orthogonal to said first array to define a checker-board pattern of conductive pads in the ground plane structure;
a first feed structure comprising a first periodically spaced set of probe feeds disposed behind the ground plane structure for exciting the first array of slots;
a second feed structure comprising a second periodically spaced set of probe feeds disposed behind the ground plane structure for exciting the second array of slots; and
an eletrically conductive back plane structure arranged behind the first and second sets of probe feeds such that the probe feeds are between the ground plane structure and the back plane structure, the back plane structure providing RF shielding;
wherein each of the first and second feed structures comprises a balanced push-pull feed respectively coupled to each of the first and second sets of probe feeds and comprising a pair of feed lines driven in anti-phase.
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Abstract
An antenna array includes an array of continuous slots formed in a ground plane structure. A feed structure for exciting the slots includes a periodic set of probe feeds disposed behind the ground plane structure.
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Citations
8 Claims
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1. A dual polarization antenna array, comprising:
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a first array of continuous slots formed in a ground plane structure; a second array of continuous slots formed in the ground plane structure, said second array orthogonal to said first array to define a checker-board pattern of conductive pads in the ground plane structure; a first feed structure comprising a first periodically spaced set of probe feeds disposed behind the ground plane structure for exciting the first array of slots; a second feed structure comprising a second periodically spaced set of probe feeds disposed behind the ground plane structure for exciting the second array of slots; and an eletrically conductive back plane structure arranged behind the first and second sets of probe feeds such that the probe feeds are between the ground plane structure and the back plane structure, the back plane structure providing RF shielding; wherein each of the first and second feed structures comprises a balanced push-pull feed respectively coupled to each of the first and second sets of probe feeds and comprising a pair of feed lines driven in anti-phase. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. An antenna array, comprising:
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an array of continuous slots formed in a conductor plane structure; a balanced push-pull feed structure for exciting the array of continuous slots, the balanced push-pull feed structure comprising a periodic set of probe feeds disposed behind the conductor plane structure; and a back plane structure comprising a conductive layer disposed behind the set of probe feeds and spaced a distance S1 from the conductor plane structure, such that the set of probe feeds is sandwiched between the conductor plane structure and the back plane structure; wherein the antenna array has an operating band, and wherein said S1 distance is greater than 12% of a mid-band wavelength and less than 60% of the mid-band wavelength.
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Specification