Primary radiator for parabolic antenna
First Claim
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1. A primary radiator for a parabolic antenna comprising:
- a radiator body having a waveguide and a horn part provided at one end of said waveguide; and
a waterproof cover covering an open end of said horn part,wherein a step for reducing reflection loss is provided on an inner surface of said radiator body, anda position and a size of said step are set so as to limit reflection loss that occurs in said radiator body to an allowable upper limit or lower,wherein a distance between said waterproof cover and said step is set to be substantially equal to an odd multiple of 180°
in terms of a phase angle of a radio wave propagating in said radiator body.
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Abstract
A primary radiator used for a parabolic antenna including: a radiator body having a horn part provided at one end of a waveguide; and a waterproof cover covering an open end of the horn part of the radiator body, wherein a step is formed on an inner surface of the horn part of the radiator body, and a position of the step is set so that radio waves reflected on the waterproof cover are cancelled out by radio waves reflected on the step to prevent multiple reflection in the radiator body.
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Citations
6 Claims
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1. A primary radiator for a parabolic antenna comprising:
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a radiator body having a waveguide and a horn part provided at one end of said waveguide; and a waterproof cover covering an open end of said horn part, wherein a step for reducing reflection loss is provided on an inner surface of said radiator body, and a position and a size of said step are set so as to limit reflection loss that occurs in said radiator body to an allowable upper limit or lower, wherein a distance between said waterproof cover and said step is set to be substantially equal to an odd multiple of 180°
in terms of a phase angle of a radio wave propagating in said radiator body. - View Dependent Claims (2, 3, 4, 5, 6)
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Specification