Frequency selective low loss transmission line system
First Claim
1. A coaxial electrical connector for mating a coaxial transmission line of first impedance having a center conductor and an outer conductor with an electrical device of second impedance, said connector comprising:
- a substantially cylindrical outer conductor having spaced first and second end portions, and an elongate center portion intermediate said end portions, said cylindrical outer conductor having an axial bore therethrough;
a dielectric insulator fixed within said bore at said center portion;
a coupling mechanism mating said first coaxial transmission line to said substantially cylindrical outer conductor; and
an inner conductor within said insulator and extending coaxially within said bore, said inner conductor having first and second end portions corresponding to said first and second end portions of said cylindrical outer conductor and a center portion corresponding to said center portion of said cylindrical outer conductor, said first end portions interfitting with the coaxial transmission line such that said first end portion of said inner conductor mates with the center conductor, and said first end portion of said cylindrical outer conductor mates with the outer conductor, and said second end portions being mateable with the electrical device, wherein the substantially cylindrical outer conductor, inner conductor, and the dielectric insulator cooperatively provide for a transformer impedance for matching the first and second impedance, and wherein a transforming length of said center portions comprising a distance from a first impedance transition between the first impedance and the transformer impedance to a second impedance transition between the transformer impedance and the second impedance.
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Accused Products
Abstract
A frequency selective low loss transmission system for communicating a signal using a coaxial cable of one impedance to a device of different impedance. A connector with a matching transformer is integral to the connector which terminates with a standard interface. The invention also includes a coupling mechanism to couple the coaxial cable with the connector. The invention can also include series open stub conductors for capacitive coupling to the conductors of the coaxial cable. In addition to low losses over a broad frequency range, the connector facilitates connector installation due to the series open stub conductor while reducing cost and complexity of both coaxial cable and connector.
32 Citations
25 Claims
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1. A coaxial electrical connector for mating a coaxial transmission line of first impedance having a center conductor and an outer conductor with an electrical device of second impedance, said connector comprising:
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a substantially cylindrical outer conductor having spaced first and second end portions, and an elongate center portion intermediate said end portions, said cylindrical outer conductor having an axial bore therethrough;
a dielectric insulator fixed within said bore at said center portion;
a coupling mechanism mating said first coaxial transmission line to said substantially cylindrical outer conductor; and
an inner conductor within said insulator and extending coaxially within said bore, said inner conductor having first and second end portions corresponding to said first and second end portions of said cylindrical outer conductor and a center portion corresponding to said center portion of said cylindrical outer conductor, said first end portions interfitting with the coaxial transmission line such that said first end portion of said inner conductor mates with the center conductor, and said first end portion of said cylindrical outer conductor mates with the outer conductor, and said second end portions being mateable with the electrical device, wherein the substantially cylindrical outer conductor, inner conductor, and the dielectric insulator cooperatively provide for a transformer impedance for matching the first and second impedance, and wherein a transforming length of said center portions comprising a distance from a first impedance transition between the first impedance and the transformer impedance to a second impedance transition between the transformer impedance and the second impedance. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A coaxial electrical connector for mating a coaxial transmission line of first impedance having a center conductor and an outer conductor with an electrical device of second impedance, said connector comprising:
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a substantially cylindrical outer conductor having spaced first and second end portions, and an elongate center portion intermediate said end portions, said cylindrical outer conductor having an axial bore therethrough;
a coupling mechanism mating said first coaxial transmission line to said substantially cylindrical outer conductor;
a dielectric insulator fixed within said bore at said center portion; and
an inner conductor within said insulator and extending coaxially within said bore, said inner conductor having first and second end portions corresponding to said first and second end portions of said cylindrical outer conductor and a center portion corresponding to said center portion of said cylindrical outer conductor, said first end portions interfitting with the coaxial transmission line such that said first end portion of said inner conductor mates with the center conductor, and said first end portion of said cylindrical outer conductor mates with the outer conductor, and said second end portions being one of N-type cable interface and DIN-7-16-type cable interface to mate with the electrical device, wherein the substantially cylindrical outer conductor, inner conductor, and the dielectric insulator cooperatively provide for a transformer impedance for matching the first and second impedance, and wherein a transforming length of said center portions comprises a distance from a first impedance transition between the first impedance and the transformer impedance to a second impedance transition between the transformer impedance and the second impedance, said transforming length substantially equivalent to an integral multiple of a quarter wavelength of a signal in the connector. - View Dependent Claims (14, 15, 16, 17)
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18. A coaxial electrical connector for mating a coaxial transmission line of a first impedance to an electrical device of a second impedance, said connector comprising:
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a first connecting portion including a first inner conductor and a first outer conductor for respectively electrically coupling with center and outer conductors of the coaxial transmission line;
a second connecting portion including a second inner conductor and a second outer conductor for electrically coupling with the electrical device;
an insulating means for electrically isolating said second inner conductor from said second outer conductor; and
a transformer means coaxially interposed between said first connecting portion and said second connecting portion and electrically coupled thereto for providing a matching impedance between the first impedance and the second impedance. - View Dependent Claims (19, 20, 21, 22)
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23. A system for communicating and conditioning a signal, said system comprising:
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a coaxial transmission line of first impedance having a center conductor and an outer conductor;
an electrical device of second impedance; and
a coaxial electrical connector comprising;
a substantially cylindrical outer conductor having spaced first and second end portions, and an elongate center portion intermediate said end portions, said cylindrical outer conductor having an axial bore therethrough;
a coupling mechanism mating said first coaxial transmission line to said substantially cylindrical outer conductor;
a dielectric insulator fixed within said bore at said center portion; and
an inner conductor within said insulator and extending coaxially within said bore, said inner conductor having first and second end portions corresponding to said first and second end portions of said cylindrical outer conductor and a center portion corresponding to said center portion of said cylindrical outer conductor, said first end portions interfitting with the coaxial transmission line such that said first end portion of said inner conductor mates with the center conductor of the coaxial transmission line, and said first end portion of said cylindrical outer conductor mates with the outer conductor of the coaxial transmission line, and said second end portions being shaped to comprise one of N-type and DIN-7-16-type interface for communicating with the electrical device, wherein the substantially cylindrical outer conductor, inner conductor, and the dielectric insulator cooperatively provide for a transformer impedance for matching the first and second impedance, and wherein a transforming length of said center portions comprises a distance from a first impedance transition between the first impedance and the transformer impedance to a second impedance transition between the transformer impedance and the second impedance. - View Dependent Claims (24, 25)
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Specification