Antenna and Radar System That Include a Polarization-Rotating Layer
First Claim
1. An antenna, comprising:
- a plurality of waveguide antenna elements arranged in a first array configured to operate with a first polarization;
a plurality of waveguide output ports arranged in a second array configured to operate with a second polarization, wherein the second polarization is different from the first polarization; and
a polarization-rotating layer with channels defined therein,wherein the polarization-rotating layer is disposed between the waveguide antenna elements and the waveguide output ports,wherein the channels are oriented at a first angle with respect to the waveguide antenna elements and at a second angle with respect to the waveguide output ports,wherein the channels are configured to receive input electromagnetic waves having the first polarization and transmit output electromagnetic waves having a first intermediate polarization, andwherein the waveguide output ports are configured to receive input electromagnetic waves and radiate electromagnetic waves having the second polarization.
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Accused Products
Abstract
An antenna includes a plurality of waveguide antenna elements arranged in a first array configured to operate with a first polarization. The antenna also includes a plurality of waveguide output ports arranged in a second array configured to operate with a second polarization. The second polarization is different from the first polarization. The antenna further includes a polarization-rotating layer with channels defined therein. The polarization-rotating layer is disposed between the waveguide antenna elements and the waveguide output ports. The channels are oriented at a first angle with respect to the waveguide antenna elements and at a second angle with respect to the waveguide output ports. The channels are configured to receive input electromagnetic waves having the first polarization and transmit output electromagnetic waves having a first intermediate polarization. The waveguide output ports are configured to receive input electromagnetic waves and radiate electromagnetic waves having the second polarization.
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Citations
20 Claims
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1. An antenna, comprising:
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a plurality of waveguide antenna elements arranged in a first array configured to operate with a first polarization; a plurality of waveguide output ports arranged in a second array configured to operate with a second polarization, wherein the second polarization is different from the first polarization; and a polarization-rotating layer with channels defined therein, wherein the polarization-rotating layer is disposed between the waveguide antenna elements and the waveguide output ports, wherein the channels are oriented at a first angle with respect to the waveguide antenna elements and at a second angle with respect to the waveguide output ports, wherein the channels are configured to receive input electromagnetic waves having the first polarization and transmit output electromagnetic waves having a first intermediate polarization, and wherein the waveguide output ports are configured to receive input electromagnetic waves and radiate electromagnetic waves having the second polarization. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A radar system, comprising:
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a transmitter, comprising; a plurality of first waveguide antenna elements arranged in a first array configured to operate with a first polarization; a first polarization-rotating layer with first channels defined therein, wherein the first polarization-rotating layer is disposed adjacent to the first waveguide antenna elements, wherein the first channels are oriented at a first angle with respect to the first waveguide antenna elements, and wherein the first channels are configured to receive input electromagnetic waves having the first polarization and transmit output electromagnetic waves having a second polarization; and a receiver, comprising; a plurality of second waveguide antenna elements arranged in a second array configured to operate with the first polarization; a second polarization-rotating layer with second channels defined therein, wherein the second polarization-rotating layer is disposed adjacent to the second waveguide antenna elements, wherein the second channels are oriented at the first angle with respect to the second waveguide antenna elements, and wherein the second channels are configured to receive input electromagnetic waves having the second polarization and transmit output electromagnetic waves having the first polarization to the second waveguide antenna elements. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19)
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20. A method, comprising:
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emitting electromagnetic waves having a first polarization from a plurality of waveguide antenna elements arranged in a first array; receiving, by channels defined within a polarization-rotating layer that is disposed between the waveguide antenna elements and a plurality of waveguide output ports arranged in a second array, the electromagnetic waves having the first polarization, wherein the channels are oriented at a first angle with respect to the waveguide antenna elements; transmitting, by the channels defined within the polarization-rotating layer, electromagnetic waves having an intermediate polarization; receiving, by the waveguide output ports, electromagnetic waves having the intermediate polarization, wherein the waveguide output ports are oriented at a second angle with respect to the channels; and radiating, by the waveguide output ports, electromagnetic waves having a second polarization, wherein the second polarization is different from the first polarization, wherein the second polarization is different from the intermediate polarization, and wherein the first polarization is different from the intermediate polarization.
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Specification