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US 4,019,162 AGranted
Coaxial transmission line with reflection compensation
AssigneeWeinschel Engineering Co., Inc.
InventorHarmon W. Banning
Life of this patent
Estimating the term…
Abstract
A coaxial transmission line for u.h.f. waves, and particularly for use with slotted line equipment, in which the center conductor is supported coaxially within the outer conductor by spaced dielectric pins extending radially between said conductors, wherein wave reflections are minimized by means of counter-bored areas in the form of shallow depressions in the surface of the inner conductor where it is engaged by said pins, said depressions completely surrounding the point of engagement of each pin with said inner conductor and being dimensioned to produce an inductive effect to compensate for the capacitive effect of the dielectric pins.
Claims17
a. A coaxial transmission line comprising
- b. a rigid hollow outer conductor,
- c. a rigid inner conductor centrally located within the hollow outer conductor, said inner conductor having an outer surface,
- d. support means for rigidly supporting the inner conductor within the outer conductor comprising spaced dielectric pins extending radially between said conductors and which separately engage said inner conductor, and
- e. means for reducing wave reflections of at least one of said pins comprising a depressed area, in said outer surface, of said inner conductor, said depressed area being located in the same lateral plane of the inner conductor as said one pin and constituting a shallow depression in the outer surface of the inner conductor and extending longitudinally along said inner conductor, said depressed area extending laterally away from the pin for a distance which is small as compared to the periphery of the inner conductor and being dimensioned to produce an inductive effect tending to compensate for the capacitive effect of the dielectric pin.
1 more element
A coaxial transmission line for UHF up to 40 GHz comprising
- b. a rigid hollow outer conductor,
- c. a rigid inner conductor centrally located within the hollow outer conductor,
- d. support means for rigidly supporting the inner conductor within the outer conductor comprising spaced dielectric pins extending radially between said conductors, each of said pins being fixed at one end of the inner conductor,
- e. means for reducing wave reflections of each said pin comprising a depressed surface area of said inner conductor, said depressed area being a single shallow surface depression on the center conductor extending longitudinally along said center conductor for a distance coextensive with but greater than the area of engagement of said center conductor with said dielectric pin, said depressed area being dimensioned to produce an inductive effect tending to compensate for the capacitive effect of the dielectric pin, and
- f. said shallow surface depression being on the other side of said conductor from said pin.
2 more elements
A coaxial transmission line comprising
- a. a rigid hollow outer conductor,
- b. a rigid inner conductor centrally located within the hollow outer conductor,
- c. support means for rigidly supporting the inner conductor within the outer conductor comprising groups of dielectric pins with the pins of each group extending in different radial planes between said conductors, at least two pins of each group being spaced from each other longitudinally along the inner conductor, with any spacing between pins of a group being small as compared to the spacing between groups, and
- d. means for reducing wave reflections of at least two of said spaced pins comprising an individual inductive cavity for each pin and through which the pin passes, each cavity being dimensioned to produce an inductive effect tending to compensate for the capacitive effect of the dielectric pin passing through the cavity.
1 more element
A coaxial transmission line comprising
- a. a rigid hollow outer conductor,
- b. a rigid inner conductor centrally located within the hollow outer conductor,
- c. said conductors comprising a transmission line having an inlet end,
- d. support means for rigidly supporting the inner conductor within the outer conductor comprising at least a plurality of dielectric pins remote from said inlet end and extending radially between said conductors with all of the said pins being spaced from each other longitudinally along the line and
- e. means for reducing wave reflections of said pins comprising an individual inductive cavity in the inner conductor for each pin and through which the pin passes, each said cavity being dimensioned to produce an inductive effect tending to compensate for the capacitive effect of the dielectric pin which passes through it.
2 more elements
Dependencies are inferred from the claim text.