Re-entrant coaxial cavity power combiner
First Claim
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1. Power combining apparatus comprising:
- housing means forming a cylindrical coaxial tuned cavity therein;
a cantilevered center conductor cylinder coupled to said housing means extending axially into the cavity of said housing means; and
a plurality of negative resistance devices extending axially into the cylindrical coaxial tuned cavity of said housing means opposite said center conductor cylinder.
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Abstract
A plurality of negative resistance devices is spaced below a cylindrical center conductor of a single coaxial cavity. Each negative resistance device has a bias device connected to it by a bias wire. Extending radially through the outer wall of the coaxial cavity is a coax cable with an RF coupling probe. A tuning screw is place axially through the interior of the center conductor for tuning the frequency of the power combiner.
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Citations
15 Claims
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1. Power combining apparatus comprising:
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housing means forming a cylindrical coaxial tuned cavity therein; a cantilevered center conductor cylinder coupled to said housing means extending axially into the cavity of said housing means; and a plurality of negative resistance devices extending axially into the cylindrical coaxial tuned cavity of said housing means opposite said center conductor cylinder. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A method of combining power from a plurality of negative resistance devices which comprises:
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providing a housing having a single cylindrical coaxial tuned cavity, said housing having a cylindrical center conductor extending into the single cylindrical coaxial tuned cavity; providing said plurality of negative resistance devices extending axially into the single cylindrical coaxial tuned cavity of said housing opposite said cylindrical center conductor; spacing said plurality of negative resistance devices circumferentially below said center conductor cylinder; spacing said plurality of negative resistance devices from said cylindrical center conductor defining a gap; and
causing the apparatus to oscillate at a frequency corresponding to the gap defined by said plurality of negative resistance devices and said cylindrical center conductor.
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10. Power combining apparatus comprising:
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a housing forming a cylindrical coaxial tuned cavity therein, said housing having an exterior wall, a first cap and a second cap; a cantilevered cylindrical center conductor being coupled to said first cap and extending axially into the cavity of said housing; a plurality of negative resistance means being secured to said second cap and extending axially into the cylindrical coaxial tuned cavity of said housing; a plurality of bias means being secured to said second cap and extending into the cylindrical coaxial tuned cavity of said housing, said plurality of bias means being coupled one each to said negative resistance means; a tuning means for tuning the frequency of said power combining apparatus, said tuning means being adjustably attached to said first cap of said housing and extending axially through said cylindrical center conductor; and an RF coupling means for removing the power from said power combining apparatus, said RF coupling means being coupled to said housing and extending into the cylindrical coaxial tuned cavity of said housing. - View Dependent Claims (11, 12, 13, 14, 15)
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Specification