TRANSMISSION LINE COUPLING AND COMBINING NETWORK FOR HIGH FREQUENCY ANTENNA ARRAY
First Claim
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1. Transmission line means comprising:
- signal combiner transmission line network means including first, second, and third hybrid circuit means each having first, second, third, and fourth port means, said first port means of said first hybrid circuit means being coupled with transmitter means, said first port means of said second hybrid circuit means being coupled with the sum channel of receiver means, said second port meaNs of said second hybrid circuit means being coupled with the difference channel of said receiver means, said first and second port means of said third hybrid circuit means being coupled with respective matched terminating energy absorber means, said second port means of said first hybrid circuit means being coupled with said second port means of said second hybrid circuit means, said second port means of said third hybrid circuit means being coupled additionally with the difference channel of said receiver means, and first and second coupling transmission line network means each having first and second pluralities of signal coupling ports, said first plurality of signal coupling ports of said first coupling transmission line network means being coupled in energy exchanging relation with said third port means of said hybrid circuit means, said first plurality of signal coupling ports of said second coupling transmission line network means being coupled in energy exchanging relation with said fourth port means of said hybrid circuit means, and said second plurality of signal coupling ports being coupled with discrete antenna elements of a lineal antenna array.
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Abstract
An improved transmission line network includes signal coupling and combining sub-networks for interchange of high frequency energy between elements of a planar lineal antenna array and a monopulse radar transmitter and receiver having sum and difference channels.
22 Citations
6 Claims
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1. Transmission line means comprising:
- signal combiner transmission line network means including first, second, and third hybrid circuit means each having first, second, third, and fourth port means, said first port means of said first hybrid circuit means being coupled with transmitter means, said first port means of said second hybrid circuit means being coupled with the sum channel of receiver means, said second port meaNs of said second hybrid circuit means being coupled with the difference channel of said receiver means, said first and second port means of said third hybrid circuit means being coupled with respective matched terminating energy absorber means, said second port means of said first hybrid circuit means being coupled with said second port means of said second hybrid circuit means, said second port means of said third hybrid circuit means being coupled additionally with the difference channel of said receiver means, and first and second coupling transmission line network means each having first and second pluralities of signal coupling ports, said first plurality of signal coupling ports of said first coupling transmission line network means being coupled in energy exchanging relation with said third port means of said hybrid circuit means, said first plurality of signal coupling ports of said second coupling transmission line network means being coupled in energy exchanging relation with said fourth port means of said hybrid circuit means, and said second plurality of signal coupling ports being coupled with discrete antenna elements of a lineal antenna array.
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2. Apparatus as described in claim 1 wherein said first and second signal combining transmission line network means comprise:
- first and second pluralities of individual transmission lines respectively coupled in first coplanar relation with said third and fourth port means of said hybrid junction means, a third plurality of mutually spaced transmission lines substantially orthogonally disposed with reference to said first plurality of transmission lines in second coplanar relation therewith, and plural over-lay signal coupler means for permitting energy exchange between each individual of said first and second pluralities of transmission lines.
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3. Apparatus as described in claim 2 including matched terminating energy absorber means coupled at one end of each of said first and second pluralities of transmission lines.
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4. Transmission line means comprising:
- signal combiner transmission line network means including first, second, and third hybrid circuit means each having first, second, third and fourth port means, said first port means of said first hybrid circuit means being coupled with the sum channel of receiver means, said second port means of said first hybrid circuit means being coupled with the difference channel of said receiver means, said first port means of said second hybrid circuit means being coupled with transmitter means, said first port means of said first hybrid circuit means being coupled additionally with said second port means of said second hybrid circuit means, said respective first and second port means of said third hybrid circuit means being coupled with matched terminating energy absorber means, said first port means of said second hybrid circuit means being additionally coupled with said second port means of said third hybrid circuit means, and first and second signal coupling transmission line network means each having respective first and second pluralities of signal coupling ports, said first plurality of signal coupling ports of said first coupling transmission line network means being coupled in energy exchanging relation with said third port means of said hybrid circuit means, said first plurality of signal coupling ports of said second coupling transmission line network means being coupled in energy exchanging relation with said fourth port means of said hybrid circuit means, and said second plurality of signal coupling ports being coupled with discrete antenna elements of a lineal antenna array.
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5. Apparatus as described in claim 4 wherein said first signal coupling network comprises:
- first, second, and third transmission lines respectively coupled with said third port means of said hybrid circuit means in coplanar relation, fourth, fifth, sixth, and sEventh mutually spaced transmission lines substantially orthogonally disposed in second coplanar relation with respect to said first coplanar plurality of transmission lines in energy coupling relationship therewith, said first transmission line being coupled with said fourth, fifth, sixth, and seventh transmission lines, said second transmission line being coupled with said fifth, sixth, and seventh transmission line, and said third transmission line being coupled with said sixth and seventh transmission lines.
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6. Apparatus as described in claim 5 including matched terminating energy absorber means coupled only at one end of said seventh transmission line.
Specification