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US 6,184,840 B2Granted
Parabolic reflector antenna
AssigneeSmartAnt Telecomm Co., Ltd.
InventorsLin Hsin-Loug, Lee Ta-Lun
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Abstract
This specification discloses a parabolic reflector antenna, which is used as an antenna for signal transmission between the radio communication base station and the mobile terminals. By determining the curvatures and relative positions of a main-dish with a main reflecting surface and a sub-dish with a sub-reflecting surface and means of determining the size of the feedback device and relevant distances in between, the present invention improves the signal reception and emission of the parabolic reflector antenna.
Claims17
A parabolic reflector antenna, comprising:
- a first cover;
- a second cover;
- a main-dish, which is connected to the interior of the second cover and contains a
- main reflecting surface defined by the formula y = 1 4 F x 2
- and a focus F, the F value being between 75 mm and 100 mm;
- a sub-dish, which is connected to the interior of the first cover and contains a
- sub-reflecting surface defined by the formula y 2 a 2 - x 2 b 2 = 1 ,
- an internal focus and an external focus, the internal focus coinciding with the parabolic focus, a being between 11 mm and 25 mm, and b being between 24 mm and 36 mm;
- and
- a feedback device, which is connected to the second cover and contains a signal emitter/receiver in electrical communication with a signal source for electromagnetic radiation, the center of the signal emitter/receiver coinciding with the hyperbolic external focus.
7 more elements
Dependencies are inferred from the claim text.