Reflector antena
First Claim
1. A reflector antenna device, comprising:
- an auxiliary reflector that receives an electric wave radiated from an opening portion by a primary radiator and reflects the electric wave; and
a main reflector that receives the electric wave that is reflected by the auxiliary reflector and radiates the electric wave to a space, characterized in that the configurations of the auxiliary reflector and the main reflector are designed such that an electric power in an area of the main reflector where the auxiliary reflector is projected on the main reflector in parallel with the radiating direction of the electric wave due to the main reflector is equal to or lower than a predetermined first threshold value, and a radiation pattern of the antenna which is determined by the area of the main reflector other than the area has a desired characteristic.
1 Assignment
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Accused Products
Abstract
A reflector antenna device includes: an auxiliary reflector 1 that receives an electric wave radiated from an opening portion by a primary radiator 3 and reflects the electric wave; and a main reflector 2 that receives the electric wave that is reflected by the auxiliary reflector 1 and radiates the electric wave to a space. In the reflector antenna device, the configurations of the auxiliary reflector 1 and the main reflector 2 are designed such that an electric power in an area of the main reflector 2 where the auxiliary reflector 1 is projected on the main reflector 2 in parallel with the radiating direction of the electric wave due to the main reflector 2 is equal 1 or lower than a predetermined first threshold value, and a radiation pattern of the antenna which is determined by the area of the main reflector 2 other than the area has a desired characteristic.
11 Citations
7 Claims
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1. A reflector antenna device, comprising:
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an auxiliary reflector that receives an electric wave radiated from an opening portion by a primary radiator and reflects the electric wave; and
a main reflector that receives the electric wave that is reflected by the auxiliary reflector and radiates the electric wave to a space, characterized in that the configurations of the auxiliary reflector and the main reflector are designed such that an electric power in an area of the main reflector where the auxiliary reflector is projected on the main reflector in parallel with the radiating direction of the electric wave due to the main reflector is equal to or lower than a predetermined first threshold value, and a radiation pattern of the antenna which is determined by the area of the main reflector other than the area has a desired characteristic. - View Dependent Claims (4, 5, 6, 7)
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2. A reflector antenna device, comprising:
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an auxiliary reflector that receives an electric wave radiated from an opening portion by a primary radiator and reflects the electric wave; and
a main reflector that receives the electric wave that is reflected by the auxiliary reflector and radiates the electric wave to a space, characterized in that the configurations of the auxiliary reflector and the main reflector are designed such that an electric power on the opening portion of the primary radiator is equal to or lower than a predetermined second threshold value, and a radiation pattern of the antenna which is determined by another area of the main reflector other than an area of the main reflector where the auxiliary reflector is projected on the main reflector in parallel with the radiating direction of the electric wave due to the main reflector has a desired characteristic.
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3. A reflector antenna device, comprising:
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an auxiliary reflector that receives an electric wave radiated from an opening portion by a primary radiator and reflects the electric wave; and
a main reflector that receives the electric Wave that is reflected by the auxiliary reflector and radiates the electric wave to a space, characterized in that the configurations of the auxiliary reflector and the main reflector are designed such that an electric power in an area of the main reflector where the auxiliary reflector is projected on the main reflector in parallel with the radiating direction of the electric wave due to the main reflector is equal to or lower than a predetermined first threshold value, an electric power on an opening portion of the primary radiator is equal to or lower than a predetermined second threshold value, and a radiation pattern of the antenna which is determined by the area of the main reflector other than the area has a desired characteristic.
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Specification