High frequency coaxial cable

Abstract

A high frequency coaxial cable exhibiting a low insertion loss and a low reflection coefficient, and incorporating an improved construction providing for convenient adjustment of impedance.

We claim: 
     
       1. A high frequency coaxial cable, comprising; an outer conductor with spaced interior convolutions presenting inner surfaces;   at least one inner conductor disposed axially within the outer conductor;   a dielectric member around the inner conductor with a plurality of axially aligned arms extending to the outer conductor; and,   at least one inwardly extending detent spaced along the inner surfaces of the outer conductor in compressive engagement with the arms of the dielectric member to lock said member in a desired position with the radial position of said detent selected in accordance with a desired electrial characteristic of said cable to control said electrical characteristic.   
     
     
       2. A cable as in claim 1 wherein said outer conductor is corrugated and said detent extends around the perimeter and axially along said outer conductor surface. 
     
     
       3. A cable as in claim 1 wherein said inner conductor includes a plurality of silver coated strands of wire. 
     
     
       4. A cable as in claim 2 wherein said outer conductor includes interlocked portions and is silver plated on its inner surface. 
     
     
       5. A cable as in claim 2 wherein said corrugated outer .[.connector.]. .Iadd.conductor .Iaddend.includes interlocking portions and is soldered at its interlocking portions. 
     
     
       6. A cable as in claim 5 wherein said outer conductor is enclosed by a wire mesh braid and a plastic outer jacket. 
     
     
       7. A coaxial cable for use in transmitting high frequency electrical signals comprising: at least one inner conductor;   an outer conductor encircling said inner conductor and spaced radially outwardly of said inner conductor;   a dielectric member extending axially of said inner and outer conductors secured to said inner conductor and having a plurality of axially extending circumferentially spaced arms extending radially toward said outer conductor; and   detent means on said outer conductor extending radially inwardly from said outer conductor in movement restraining relationship to said arms for holding said dielectric member and inner conductor against movement relative said outer conductor with the radial position of said detent means located for controlling an electrical characteristic of said cable.   
     
     
       8. The coaxial cable claimed in claim 7 in which said outer conductor is formed in a series of continuous turns having interlocked opposite edges and a wall portion in each turn intermediate said opposite edges is offset radially inwardly of said opposite edges with said detent means being formed in said wall portion for engaging the radially outward end of each of said arms. .Iadd. 9. A high frequency coaxial cable, comprising: an outer conductor with spaced interior convolutions presenting inner surfaces;   at least one inner conductor disposed axially within said outer conductor;   a dielectric member around said inner conductor and extending to said outer conductor; and   at least one inwardly extending detent spaced along said inner surfaces of said outer conductor in compressive engagement with said dielectric member to lock said member in a desired position with the position of said detent selected in accordance with a desired electrical characteristic of said cable to control said electrical characteristic. .Iaddend. .Iadd. 10. A coaxial cable for use in transmitting high frequency electrical signals comprising:   at least one inner conductor;   an outer conductor encircling said inner conductor and spaced radially outwardly of said inner conductor;   a dielectric member extending axially of said inner and outer conductors secured to said inner conductor; and   detent means on said outer conductor extending radially inwardly from said outer conductor in movement restraining relationship to said dielectric member for holding said dielectric member and said inner conductor against movement relative to said outer conductor with the radial position of said detent means located for controlling an electrical characteristic of said cable. .Iaddend.