Shielded and multishielded coaxial connectors
A shielded coaxial connector with a moveable center conductor and a stationary center conductor, the center conductors forming a disconnect switch that interoperates with a waveguide to shield one of the center conductors from radio frequency signals such as radio frequency signals carried by the other center conductor.
1. A shielded coaxial connector for use in cable and satellite television signal distribution systems, the connector comprising:
a hollow metallic body;
within the body, a midbody waveguide;
a stationary center conductor and a moveable center conductor, the center conductors operable as a single pole, single throw disconnect switch via movement of one of the center conductors through an aperture in the waveguide; and,
the waveguide aperture having a maximum dimension not exceeding 3.0 mm;
wherein the disconnect switch and the waveguide interoperate to shield the stationary center conductor from stray radio frequency signals when the disconnect switch is open and wherein the disconnect switch enables conduction of radio frequency signals through the connector when the disconnect switch is closed.
2. The shielded coaxial connector of claim 1 wherein the waveguide aperture is substantially in the form of a circular aperture.
3. The shielded coaxial connector of claim 1 wherein a waveguide thickness normal to an aperture centerline is in the range of 0.5 to 1.5 mm.
4. The shielded coaxial connector of claim 1 further comprising:
an actuator that carries the moving conductor is urged by a spring to protrude from an end of the body.
5. The shielded coaxial connector of claim 4 wherein the spring encircles the moving center conductor.
6. The shielded coaxial connector of claim 5 wherein the spring is located between the waveguide and a surface of the actuator for engaging a mating coaxial connector.
7. The shielded coaxial connector of claim 5 further comprising:
an actuator surface and a waveguide surface defining end points of a line of variable length;
a minimum line length indicative of the disconnect switch in a closed state for conducting a signal through the connector; and,
a maximum line length indicative of the disconnect switch in an open state for preventing conduction of a signal through the connector.
8. The shielded coaxial connector of claim 5 wherein when the disconnect switch is open, a tip of the movable center conductor is located within the waveguide aperture.
9. The shielded coaxial connector of claim 8 wherein the stationary conductor is not located within the waveguide aperture.
10. The shielded coaxial connector of claim 5 wherein the disconnect switch includes a socket and a mating pin wherein interengagement of the socket and the pin closes the disconnect switch.
11. The shielded coaxial connector of claim 10 further comprising:
a first coaxial port for engaging a male coaxial connector;
the moving conductor forming a part of the first coaxial port; and,
the actuator forming at least part of a first port insulator for electrically isolating the moving conductor from the body.
12. The shielded coaxial connector of claim 11 further comprising:
a second coaxial port for engaging a male coaxial connector;
the stationary conductor forming a part of the second coaxial port; and,
a second port insulator for electrically isolating the stationary conductor from the body.
13. The shielded coaxial connector of claim 12 further comprising:
a male coaxial connection for engaging a female coaxial connector;
the stationary conductor forming a part of the male coaxial connection; and,
a male coaxial connection insulator for electrically isolating the stationary conductor from the body.
14. The shielded coaxial connector of claim 6 further comprising:
a male coaxial connection for engaging a female coaxial connector;
the moving conductor forming a part of the male coaxial connection;
the actuator protruding into a fastener of the male coaxial connection; and,
the actuator forming at least part of a male coaxial connection insulator for electrically isolating the moving conductor from the body.
15. The shielded coaxial connector of claim 14 further comprising:
a coaxial port for engaging with a male coaxial connector;
the stationary conductor forming a part of the coaxial port; and,
a coaxial port insulator for electrically isolating the stationary conductor from the body.
16. A method of protecting a CATV coaxial connector center conductor from ingress of radio frequency signals, the method comprising the steps of:
providing a coaxial connector;
along a longitudinal centerline of the connector, locating a stationary center conductor and a movable center conductor;
in a first configuration, shielding the stationary conductor from radio frequency signals with a waveguide when the stationary conductor does not contact the moving conductor; and,
in a second configuration, interengaging the movable and stationary conductors via movement of the movable conductor in an aperture of the waveguide to provide signal transmission through the connector;
wherein a spring urges the first configuration and a mating coaxial connector that compresses the spring forces the second configuration.
17. The method of claim 16 wherein a tip of the stationary conductor is located in a waveguide aperture.
18. The method of claim 16 wherein a waveguide aperture is located such that the stationary conductor does not pass through the aperture.