Reflective antenna apparatus and design method thereof
First Claim
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1. A reflective antenna apparatus, comprising:
- a feeder which receives an electromagnetic wave from a transmitter and distributes the electromagnetic wave to the antenna apparatus;
a sub reflector which has a step formed to generate an orbital angular momentum (OAM) mode electromagnetic wave; and
a main reflector which has a step formed to generate the same electromagnetic wave as the OAM mode generated by the sub reflector and cancels the OAM mode electromagnetic wave generated by the sub reflector and an OAM mode electromagnetic wave generated by the main reflector to radiate the electromagnetic waves to a far field.
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Abstract
A reflective antenna apparatus according to an exemplary embodiment of the present invention includes a feeder which receives an electromagnetic wave from a transmitter and distributes the electromagnetic wave to the antenna apparatus; a sub reflector which has a step formed to generate an orbital angular momentum (OAM) mode electromagnetic wave; and a main reflector which has a step formed to generate the same electromagnetic wave as the OAM mode generated by the sub reflector and cancels the OAM mode electromagnetic wave generated by the sub reflector and an OAM mode electromagnetic wave generated by the main reflector to radiate the electromagnetic waves to a far field.
4 Citations
20 Claims
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1. A reflective antenna apparatus, comprising:
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a feeder which receives an electromagnetic wave from a transmitter and distributes the electromagnetic wave to the antenna apparatus; a sub reflector which has a step formed to generate an orbital angular momentum (OAM) mode electromagnetic wave; and a main reflector which has a step formed to generate the same electromagnetic wave as the OAM mode generated by the sub reflector and cancels the OAM mode electromagnetic wave generated by the sub reflector and an OAM mode electromagnetic wave generated by the main reflector to radiate the electromagnetic waves to a far field. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A reflective antenna apparatus, comprising:
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a feeder which receives an electromagnetic wave from a transmitter and distributes the electromagnetic wave to the antenna apparatus; a sub reflector in which a reflectarray substrate is formed to generate an orbital angular momentum (OAM) mode electromagnetic wave; and a main reflector in which a reflectarray substrate is formed to generate the same electromagnetic wave as the OAM mode generated by the sub reflector and which cancels the OAM mode electromagnetic wave generated by the sub reflector and an OAM mode electromagnetic wave generated by the main reflector to radiate the electromagnetic waves to a far field. - View Dependent Claims (9)
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10. A reflective antenna apparatus, comprising:
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a feeder which receives an electromagnetic wave from a transmitter and distributes the electromagnetic wave to the antenna apparatus; a sub reflector in which a reflectarray substrate is formed to generate an orbital angular momentum (OAM) mode electromagnetic wave; and a main reflector which has a step formed to generate the same electromagnetic wave as the OAM mode generated by the sub reflector and cancels the OAM mode electromagnetic wave generated by the sub reflector and an OAM mode electromagnetic wave generated by the main reflector to radiate the electromagnetic waves to a far field. - View Dependent Claims (11, 12, 13)
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14. A reflective antenna apparatus, comprising:
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a feeder which receives an electromagnetic wave from a transmitter and distributes the electromagnetic wave to the antenna apparatus; a sub reflector which has a step formed to generate an orbital angular momentum (OAM) mode electromagnetic wave; and a main reflector in which a reflectarray substrate is formed to generate the same electromagnetic wave as the OAM mode generated by the sub reflector and which cancels the OAM mode electromagnetic wave generated by the sub reflector and an OAM mode electromagnetic wave generated by the main reflector to radiate the electromagnetic waves to a far field. - View Dependent Claims (15, 16)
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17. An antenna design method, comprising:
- reflecting an electromagnetic wave which is radiated from a sub reflector which generates a first OAM mode to a feeder;
reflecting the reflective wave reflected from the sub reflector, by a main reflector which generates a second OAM mode, to output a final reflective wave in which the first OAM mode of the sub reflector and the second OAM mode of the main reflector are cancelled; and confirming a main beam characteristic of the final reflective wave. - View Dependent Claims (18, 19, 20)
- reflecting an electromagnetic wave which is radiated from a sub reflector which generates a first OAM mode to a feeder;
Specification