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A coaxial feed-through device (feed-through) for coupling a received process connection to a storage tank (tank) including an inner electrical conductor (probe), an outer electrical conductor; and a dielectric sleeve disposed between the probe and the outer electrical conductor. The dielectric sleev

A coaxial feed-through device (feed-through) for coupling a received process connection to a storage tank (tank) including an inner electrical conductor (probe), an outer electrical conductor; and a dielectric sleeve disposed between the probe and the outer electrical conductor. The dielectric sleeve is configured to provide an upper coaxial transmission line segment (upper CTL segment) providing a substantially 50 ohm impedance and a lower coaxial transmission line segment (lower CTL segment) which includes one or more sub-segments having an impedance that is at least forty (40%) percent higher as compared to the substantially 50 ohm impedance.

대표청구항 ▼

1. A coaxial feed-through for coupling a received process connection to a storage tank, comprising: an inner probe;an outer electrical conductor; anda dielectric sleeve disposed between said probe and said outer electrical conductor;wherein said dielectric sleeve is configured to provide said feed-t

1. A coaxial feed-through for coupling a received process connection to a storage tank, comprising: an inner probe;an outer electrical conductor; anda dielectric sleeve disposed between said probe and said outer electrical conductor;wherein said dielectric sleeve is configured to provide said feed-through an upper coaxial transmission line segment providing a substantially 50 ohm impedance and a lower coaxial transmission line segment closer to said tank than said upper coaxial transmission line segment that includes one or more sub-segments having an impedance that is at least forty (40%) percent higher as compared to said substantially 50 ohm impedance. 2. The feed-through of claim 1, wherein said dielectric sleeve has a common dielectric material throughout said lower coaxial transmission line segment. 3. The feed-through of claim 2, wherein said one or more sub-segments include at least a first sub-segment and a second sub-segment having a difference in thickness of said common dielectric material of at least twenty (20%) percent. 4. The feed-through of claim 3, wherein an impedance of said first sub-segment is 65 ohms±10% and an impedance of said second sub-segment is 80 ohms±10%. 5. The feed-through of claim 2, wherein said dielectric sleeve in said lower coaxial transmission line segment provides a linearly tapered thickness for said common dielectric material increasing linearly in thickness from a top of said lower coaxial transmission line segment to a bottom of said lower coaxial transmission line segment. 6. The feed-through of claim 1, wherein said outer electrical conductor includes a protruding shoulder at a bottom of said upper coaxial transmission line segment and said feed-through has a constant cross section area along its entire length. 7. The feed-through of claim 1, wherein said dielectric sleeve has two or more different dielectric materials in said lower coaxial transmission line segment. 8. The feed-through of claim 1, wherein said tank includes a nozzle having a metal flange on said nozzle, wherein said feed-through is welded by a weld material to said metal flange. 9. The feed-through of claim 1, wherein said feed-through is threaded to a tank aperture in a top surface of said tank. 10. The feed-through of claim 1, wherein said feed-through is welded to a metal flange that is on a top surface of said tank. 11. A guided wave radar (GWR) system, comprising: an electronic block including a processor coupled to a transceiver that is coupled to a transmission line connector providing a process connection which is coupled by a coaxial feed-through to a storage tank;said feed-through including: an inner probe;an outer electrical conductor; anda dielectric sleeve disposed between said probe and said outer electrical conductor;wherein said dielectric sleeve is configured to provide said feed-through an upper coaxial transmission line segment providing a substantially 50 ohm impedance and a lower coaxial transmission line segment closer to said tank than said upper coaxial transmission line segment that includes one or more sub-segments having an impedance that is at least forty (40%) percent higher as compared to said substantially 50 ohm impedance. 12. The system of claim 11, wherein said dielectric sleeve has a common dielectric material throughout said lower coaxial transmission line segment. 13. The system of claim 12, wherein said one or more sub-segments include at least a first sub-segment and a second sub-segment having a difference in thickness of said common dielectric material of at least twenty (20%) percent. 14. The system of claim 13, wherein an impedance of said first sub-segment is 65 ohm±10% and an impedance of said second sub-segment is 80 ohm±10%. 15. The system of claim 12, wherein said dielectric sleeve in said lower coaxial transmission line segment provides a linearly tapered thickness for said common dielectric material increasing linearly in thickness from a top of said lower coaxial transmission line segment to a bottom of said lower coaxial transmission line segment. 16. The system of claim 11, wherein said outer electrical conductor includes a protruding shoulder at a bottom of said upper coaxial transmission line segment and said feed-through has a constant cross section area along its entire length. 17. The system of claim 11, wherein said dielectric sleeve has two or more different dielectric materials in said lower coaxial transmission line segment. 18. The system of claim 11, wherein said tank includes a nozzle having a metal flange on said nozzle, wherein said feed-through is welded by a weld material to said metal flange. 19. The system of claim 11, wherein said feed-through is threaded to a tank aperture in a top surface of said tank. 20. The system of claim 11, wherein said feed-through is welded to a metal flange that is on a top surface of said tank.