Broadband surge protector for RF/DC carrying conductor

A surge protector, comprising:

• a coaxial through-section having a first inner and a first outer conductor, the coaxial-through section having a first end and a second end;
• a first connector coupled to the first end of the coaxial through-section, the first connector being adapted to electrically couple the first end of the coaxial through-section to a first coaxial cable;
• a second connector coupled to the second end of the coaxial through-section, the second connector being adapted to electrically couple the second end of the coaxial through-section to a second coaxial cable;
• a stub having a second inner conductor, a second outer conductor, and a first end and a second end, the stub being coupled to the coaxial through-section, wherein the second inner conductor is conductively coupled to the first inner conductor at the first end of the stub and the second outer conductor is conductively coupled to the first outer conductor at the first end of the stub, the second inner conductor being substantially hollow and having a helical aperture disposed therein;
• a charge elimination device conductively coupled between said second inner conductor and a grounding device;
• and
• a radio frequency short circuit bypass electrically coupled between said second inner conductor and said second outer conductor.

A method of protecting a cable from electrical surges, while permitting both RF signals and DC current to flow through said cable, said method comprising:

• interposing in said cable a surge protector including a coaxial through-section having a first inner conductor and a first outer conductor and a coaxial stub having a second inner conductor and a second outer conductor, the stub having a first end and a second end, the second inner conductor being conductively coupled to the first inner conductor at the first end of the stub, the second outer conductor being conductively coupled to the first outer conductor at the first end of the stub, the second inner conductor being substantially hollow and having a generally cylindrical outer wall and a helical aperture in the generally cylindrical outer wall of the second inner conductor;
• conductively coupling a charge elimination device between said second inner conductor and said a device;
• and
• electrically coupling a radio frequency short circuit bypass between said second inner conductor and said outer conductor.