Dictionary of Electrical Engineering terms
"A"
"B"
"C",
"D",
"E",
"F",
"G",
"H",
"I",
"J",
"K",
"L",
"M",
"N",
"O",
"P",
"Q",
"R",
"S",
"T",
"U",
"V",
"W",
"X",
"Y",
"Z"
Triaxial Cable
Both of these cables detail double shielded coaxial cables. Because the shields are separated by a layer of insulation they become individual conductors. With the two conductor shields and the center conductor, the cable is a triaxial cable.
MIL-DTL-17/134
50 Ohm RF Shielded Coax
MIL-DTL-17/134. 50 Ohm RF Triaxial Low Smoke / Water Blocked Cable.
The cable specification replaces MIL-C-17/134.
Cable weight is 5 pounds per 100 feet.
DC resistance is 1.05 ohms per 100 feet.
The jacket is a cross-linked Polyolefin.
The inner conductor is a solid strand, while the inner shield and outer shield is a single braid of 36 gauge copper wire. Both the inner conductor and outer conductor have a shield coverage of 90 percent. The cable operates up to 3GHz.
MIL-DTL-17/135
50 Ohm RF Shielded Coax
MIL-DTL-17/135. 50 Ohm RF Triaxial Low Smoke / Water Blocked Cable.
Cable weight is 16 to 18.5 pounds per 100 feet depending on the jacket material.
Capacitance per foot is 32pF maximum
DC Resistance is 1.62 ohms per 100 feet
The inner conductor is 7 strands of copper wire, while the inner shield and outer shield is a single braid of 33 gauge copper wire. The inner shield offers coverage of 90 percent, while the outer shield provides 85 percent coverage. The cable operates up to 3GHz.
The weight of the 135 slash sheet is 3 times the weight of /134 which could preclude using the former in weight critical application such as flight.
Cable Types and Cable Terms
Coaxial Cable Terms
Cable Armor Terms
There is no triax connector, by name. A twinax connector uses three conductors, two signals and a ground shield. The coax connector uses two conductors, one signal and a ground shield. Of course a cable could carry any number of shields insulated from one another.
