Broad Band Antennas and Feed Methods
First Claim
1. A dual Vivaldi antenna, comprising:
- a first Vivaldi subantenna; and
a second Vivaldi subantenna electrically connected in parallel to the first Vivaldi subantenna.
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Accused Products
Abstract
Two or more Vivaldi antennas, consisting of two plates each, each with the antenna'"'"'s natural impedance of approximately 100 ohms, are placed in parallel to achieve a 50 ohm impedance in the case of two antennas or other impedances (100/n ohms) for more than two antennas. A single Vivaldi antenna plate (half Vivaldi antenna) over a ground plane can also be used to achieve a 50 ohm impedance, or two or more single plates over a ground plane to achieve other impedances. Unbalanced 50 ohm transmission lines, e.g. coaxial cables, can be used to directly feed, the dual Vivaldi (four plate) antenna in a center fed angled center departure, or more desirably, a center fed offset departure configuration.
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Citations
20 Claims
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1. A dual Vivaldi antenna, comprising:
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a first Vivaldi subantenna; and a second Vivaldi subantenna electrically connected in parallel to the first Vivaldi subantenna. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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19. A half Vivaldi antenna, comprising:
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a ground plane; and a first conductive plate supported in a spaced relationship to the ground plane, the first plate and ground plane defining a gap therebetween that is narrowest at a throat and increases along a curved surface of the first plate to a distal tip. - View Dependent Claims (20)
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Specification