High power coaxial power divider
AssigneeRCA Corporation
InventorNorman R. Landry
Life of this patent
Estimating the term…
Abstract
The power handling capacity of a matched coaxial transmission line power divider is increased with a minimum increase in losses by mounting the isolation resistor(s) within the dielectric volume of the coaxial transmission line and on an electrically-insulating resistor contact portion of a thermally-conducting heat sink. A low dielectric constant region is located between the resistor contact portion of the heat sink and the directly adjacent portion of the outer conductor of the coaxial transmission line.
Claims9
A coaxial transmission line coupling structure for connecting a common port to n branch ports where n is an integer greater than 1, said structure designed for operation over a predetermined frequency band, said structure comprising:
- an inner conductor system including a common leg and n branch legs extending from a common junction with said common leg;
- an n terminal resistance element for dissipating odd mode power and for isolating said n branch ports from each other, each of said n terminals connected to an associated branch leg at a distance from said common junction of approximately one quarter wavelength at a frequency in said band;
- an outer conductor enclosing said inner conductor system;
- a thermally conducting dielectric heat sink coupled between said resistance element and said outer conductor for conducting heat away from said resistance element;
- and
- said outer conductor and said heat sink being configured to form a region of a lower dielectric constant than said heat sink between said resistance element and said outer conductor to provide a lower capacitance between said resistance element and said outer conductor than would be provided in the absence of said lower dielectric constant region.
A coaxial transmission line coupling structure for connecting a common port to n branch ports where n is an integer greater than 1, said structure designed for operation over a predetermined frequency band, said structure comprising:
- an inner conductor system including a common leg and n branch legs extending from a common junction with said common leg;
- an n terminal resistance element for dissipating odd mode power and for isolating said n branch ports from each other, each of said n terminals connected to an associated branch leg at a distance from said common junction of approximately one quarter wavelength at a frequency in said band;
- an outer conductor enclosing said inner conductor system;
- a thermally conducting dielectric heat sink coupled between said resistance element and said outer conductor for conducting heat away from said resistance element;
- and
- at least one of said heat sink and said outer conductor having an alcove therein, said alcove having a lower dielectric constant than said heat sink, to form a low dielectric constant region between said resistance element and said outer conductor to provide a low capacitance therebetween while providing effective heat transfer from said resistance element to said outer conductor.
Dependencies are inferred from the claim text.