Coaxial connector with ingress reduction shield
A coaxial connector with an F female waveguide is configured to limit exchange of certain RF signals.
1. A coaxial cable connector comprising:
an outer connector body;
a female end of the connector is for engaging a male coaxial cable connector;
the connector female end having a waveguide with an aperture for receiving a center conductor of a coaxial cable;
the waveguide made from a non-metallic base bearing an RF shielding material;
wherein a diameter of the aperture is in a range 1.5 mm to 3.0 mm; and,
wherein the waveguide is configured to shield connector body internals from ingress of radio frequency signals in a range of 1 to 1000 megahertz.
2. The connector of claim 1 further comprising:
a waveguide surface;
the waveguide surface bordering the aperture and an aperture centerline about perpendicular to the waveguide surface;
a thickness of a waveguide surface measured along a line parallel to the aperture centerline is not less than 0.5 mm; and,
the thickness of the waveguide surface measured along a line parallel to the aperture centerline is not more than 2.0 mm.
3. The connector of claim 2 wherein the diameter of the aperture and the thickness of the waveguide are configured to provide a nominal 75 ohm connection.
4. The connector of claim 3 further comprising:
a rim of the outer connector body; and,
the waveguide formed at least in part by the rim.
5. The connector of claim 3 further comprising:
a rim of the outer connector body; and,
the waveguide formed by a disc separable from the connector body.
6. A coaxial cable connector comprising:
an outer connector body;
a female end of the connector is for engaging a male coaxial cable connector;
the connector female end having a waveguide with an aperture for receiving a
center conductor of a coaxial cable;
wherein the waveguide is made from (i) a metallically impregnated polymer or ceramic material or (ii) a polymer, ceramic, or fiberglass type material with a sputtered or etched magnetic material on a waveguide surface;
a diameter of the aperture is not less than two times the diameter of the center conductor;
the diameter of the aperture is not more than 4 times the diameter of the center conductor; and,
wherein the waveguide is configured to shield connector body internals from ingress of radio frequency signals in a range of 1 to 1000 megahertz while maintaining a nominal connector impedance of 75 ohms.
7. The connector of claim 6 further comprising:
a waveguide surface;
the waveguide surface bordering the aperture and an aperture centerline about perpendicular to the waveguide surface;
a thickness of a waveguide surface measured along a line parallel to the aperture centerline is not less than 0.5 mm; and,
the thickness of the waveguide surface measured along a line parallel to the aperture centerline is not more than 2.0 mm.
8. The connector of claim 6 wherein the diameter of the aperture and a thickness of the waveguide are selected to achieve a connector nominal impedance of 75 ohms.
9. The connector of claim 8 further comprising:
a rim of the outer connector body; and,
the waveguide formed by the rim.
10. The connector of claim 8 further comprising:
a fixture of the outer connector body; and,
the waveguide formed by a disc held in place by the fixture.
11. The connector of claim 10 wherein the fixture is a rim integral with the connector body.
12. A female F connector comprising:
a center conductor entry hole having an area;
the area equivalent to that of a circle having a diameter in a range of 1.5 to 3.0 mm;
the entry hole defined by at least one of a connector body and a waveguide disc;
the entry hole bounded by a wall having a thickness in a range of 0.5 to 2.0 mm;
a blind connector body and a waveguide disc fixation formed by a body end-rim;
the entry hole is defined by the waveguide disc;
the waveguide disc fixation configured to keep an outer ring within the connector body;
the outer ring configured to keep the waveguide disc within the connector body; and,
the outer ring encircles a waveguide disc lip that encircles the entry hole.
13. A female F connector comprising:
an end opening body hole and a separate entry disk behind the hole with a 1.5 to 3 mm port and a thickness of 0.5 to 1.5 mm; and,
wherein the disk includes plural slotted openings.
14. A nominal 75 ohm female F connector comprising:
a center conductor entry hole having an area;
the area equivalent to that of a circle having a diameter in a range of 1.5 to 3.0 mm;
the entry hole bounded by a wall having a thickness in a range of 0.5 to 2.0 mm;
the entry hole defined by a waveguide disc;
a blind connector body and a waveguide disc fixation at a body end;
the waveguide and an adjacent ring overlap in pin and socket type coaxial arrangement; and,
the waveguide disc fixation configured to keep the waveguide disc and the ring within the connector body.