Direction finding antenna interface
First Claim
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1. A direction finding antenna interface for receiving, impedance transforming, and transmitting signals to an arithmetic network comprising:
- antenna means having a plurality of arms for receiving signals;
a stripline feed circuit/transformer connected between the antenna means and the arithmetic network for impedance optimization of the different radiation modes by controlling the widths, lengths, and the spacings of the striplines; and
stripline feed circuit/transformer support means connected to the antenna means for fixedly holding the stripline feed circuit/transformer between the antenna means and the arithmetic network.
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Abstract
A microwave direction finding antenna interface is disclosed which is cape of operating over multioctave bandwidth with an upper frequency limit exceeding forty gigahertz. The antenna, feed circuit/transformer and arithmetic network have non-interrupted TEM electrical paths of strip transmission lines (striplines). Further, a process of fabricating the antenna, feed circuit/transformer and arithmetic network in conjunction with the support means is described.
15 Citations
11 Claims
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1. A direction finding antenna interface for receiving, impedance transforming, and transmitting signals to an arithmetic network comprising:
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antenna means having a plurality of arms for receiving signals; a stripline feed circuit/transformer connected between the antenna means and the arithmetic network for impedance optimization of the different radiation modes by controlling the widths, lengths, and the spacings of the striplines; and stripline feed circuit/transformer support means connected to the antenna means for fixedly holding the stripline feed circuit/transformer between the antenna means and the arithmetic network. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A method of constructing a direction finding antenna interface having an antenna with a plurality of arms, a stripline feed circuit/transformer with a plurality of feed strips and an arithmetic network disposed upon support means comprising the steps of:
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forming the first dielectric substrate upon which the antenna is disposed; etching the antenna upon the first dielectric substrate; forming a second dielectric substrate in a shape upon which the stripline feed circuit/transformer is disposed; etching the stripline feed circuit/transformer upon the opposite sides of the second dielectric substrate, the stripline feed circuit/transformer being designed to optimize the impedance matching between the antenna and the arithmetic network; forming a third and fourth dielectric substrate in a shape to be attached to each broad side of the second dielectric substrate; securing fixedly to each other the second, third and fourth dielectric substrates; securing fixedly ground plane means to the first, second, third and fourth dielectric substrates; securing fixedly the first dielectric substrate to the second, third, and fourth dielectric substrates; electrically connecting the stripline feed circuit/transformer to the arms of the antenna; and electrically connecting the stripline feed circuit/transformer to the arithmetic network. - View Dependent Claims (9, 10, 11)
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Specification