Claims
- 1. A surge protection device comprising:
an input path for receiving an rf signal, dc power, and a surge; an output path for propagating the rf signal and the dc power; a dc blocking device coupled in series between the input path and the output path; a first inductor coupled to the input path for isolating the rf signal and providing a path for the dc power and the surge; a gas tube coupled to the first inductor for routing a portion of the surge to a ground plane; a second inductor coupled to the first inductor for providing a path for the dc power; a metal oxide varistor coupled to the second inductor for routing a portion of the surge to the ground plane; a third inductor coupled to the second inductor for providing a path for the dc power; a diode coupled to the third inductor for routing a portion of the surge to the ground plane; and a fourth inductor coupled to the third inductor for providing a path for the dc power to the output path.
- 2. The surge protection device of claim 1, further comprising a housing having a cavity for housing the dc blocking device, the first, second, third, and fourth inductors, the gas tube, the metal oxide varistor, and the diode.
- 3. The surge protection device of claim 2, wherein the cavity has a shape that is selected from a group consisting of a laterally stretched cylinder, an ellipse, an oval, and an ovoid.
- 4. The surge protection device of claim 3, wherein the shape of the cavity improves the impedance matching of the rf signal path and the bandwidth of the rf signal.
- 5. The surge protection device of claim 2, wherein the cavity is defined by two substantially parallel side walls and two substantially non-parallel end walls connecting the two substantially parallel side walls.
- 6. The surge protection device of claim 5, wherein at least one of the two substantially non-parallel end walls has a curved shape with a center point.
- 7. The surge protection device of claim 6, wherein the dc blocking device is positioned at the center point to improve the rf signal path and the bandwidth of the rf signal.
- 8. An apparatus for isolating dc power and a surge from an rf path to improve the bandwidth of an rf signal that travels along the rf path, the apparatus comprising:
a conductive plate; an inductor positioned adjacent to the conductive plate for routing the dc power and the surge away from the rf path; means, coupled to the inductor, for diverting the surge to the conductive plate; and a dc path coupled to the inductor for routing the dc power to the rf path.
- 9. The apparatus of claim 8, further comprising a housing having a cavity for holding the conductive plate.
- 10. The apparatus of claim 9, wherein the inductor, the means for diverting, and the dc path are positioned within the cavity.
- 11. The apparatus of claim 9, wherein the cavity is defined by two substantially parallel side walls and a curved end wall joining the two substantially parallel side walls.
- 12. The apparatus of claim 9, wherein the cavity has a shape selected from a group consisting of a laterally stretched cylinder, ellipse, oval, and ovoid.
- 13. The apparatus of claim 8, wherein the means for diverting is a gas tube.
- 14. The apparatus of claim 8, wherein the means for diverting is a metal oxide varistor.
- 15. The apparatus of claim 8, wherein the means for diverting is a diode.
- 16. The apparatus of claim 8, wherein the dc path includes a conductor.
- 17. The apparatus of claim 8, wherein the dc path includes a plurality of inductors.
- 18. An apparatus for reducing parasitic matched impedance of an rf path and isolating dc power and surge energy from the rf path to improve the bandwidth of an rf signal that travels along the rf path, the apparatus comprising:
a housing having a cavity; a conductive plate positioned in the cavity; a gas tube mounted on the conductive plate for diverting a portion of the surge energy to the conductive plate; an inductor positioned proximate to the conductive plate and coupled to the gas tube for isolating the rf signal and passing the surge energy to the gas tube; and a dc path coupled to the inductor for routing the dc power to the rf path.
- 19. The apparatus of claim 18, further comprising a dc blocking device positioned along the rf path and coupled to the inductor.
- 20. The apparatus of claim 18, further comprising a metal oxide varistor coupled to the dc path for diverting a portion of the surge energy to the conductive plate.
- 21. The apparatus of claim 20, further comprising a mounting clip mounted on the conductive plate for coupling the metal oxide varistor to the conductive plate.
- 22. The apparatus of claim 20, wherein the metal oxide varistor is left-right centered on the conductive plate.
- 23. The apparatus of claim 18, further comprising a diode coupled to the dc path for diverting a portion of the surge energy to the conductive plate.
- 24. The apparatus of claim 23, wherein the diode is mounted on a left side of the conductive plate.
- 25. The apparatus of claim 24, further comprising a second capacitor mounted on the left side of the conductive plate and coupled to the diode.
- 26. The apparatus of claim 25, wherein the dc path includes a third inductor that is positioned above the second capacitor.
- 27. The apparatus of claim 18, wherein the gas tube is mounted on a right side of the conductive plate.
- 28. The apparatus of claim 27, further comprising a first capacitor mounted on the right side of the conductive plate and coupled to the gas tube.
- 29. The apparatus of claim 28, wherein the dc path includes a second inductor that is coupled to the inductor and positioned above the first capacitor.
- 30. The apparatus of claim 18, wherein the dc path includes a conductor and a plurality of inductors positioned above the conductive plate.
- 31. The apparatus of claim 18, wherein the cavity is defined by two substantially parallel side walls and a curved end wall joining the two substantially parallel side walls.
- 32. The apparatus of claim 31, further comprising a dc blocking device positioned along the rf path and proximate to the curved end wall.
- 33. A method for increasing the bandwidth of a surge protection device that is configured to receive an rf signal, dc power, and a surge, the surge protection device includes a dc blocking device, an inductor, and a gas tube, the method comprising:
providing a housing having substantially parallel side walls, a curved end wall, and a bottom surface that define a cavity, wherein the curved end wall has a center point; positioning the dc blocking device within the cavity and above the bottom surface of the cavity for blocking the surge and passing the rf signal; coupling the inductor to the dc blocking device for isolating the rf signal and providing a path for the dc power and the surge; and coupling the gas tube to the inductor and the bottom surface of the cavity for routing a portion of the surge to a ground.
- 34. The method of claim 33, further comprising coupling a second inductor to the inductor for providing a path for the dc power.
- 35. The method of claim 34, further comprising coupling a metal oxide varistor to the second inductor for routing a portion of the surge to the ground.
- 36. The method of claim 34, further comprising coupling a diode to the second inductor for routing a portion of the surge to the ground.
- 37. The method of claim 34, further comprising coupling a third inductor to the second inductor for providing a path for the dc power.
- 38. The method of claim 37, further comprising coupling a fourth inductor to the third inductor for providing a path for the dc power.
- 39. The method of claim 37, wherein the second and third inductors are positioned above the bottom surface of the housing.
- 40. The method of claim 33, wherein the curved end wall is eccentric in shape to enhance specific rf properties.
- 41. The method of claim 33, wherein positioning the dc blocking device within the cavity includes positioning the dc blocking device at the center point to enhance specific rf properties.
- 42. The method of claim 33, wherein positioning the dc blocking device within the cavity includes positioning the dc blocking device offset from the center point to enhance specific rf properties.
CROSS-REFERENCE TO RELATED APPLICATION
[0001] This application relates to and claims priority from U.S. Provisional Patent Application Serial No. 60/329,087, filed Oct. 12, 2001, entitled “RF SURGE PROTECTOR,” which is herein incorporated by reference for all purposes.
Provisional Applications (1)
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Number |
Date |
Country |
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60329087 |
Oct 2001 |
US |