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Harbour Braided Wire Separator

SB (Strip Braid) Coaxial Cable

Strip Braid Coax

Lower Attenuation than MIL-DTL-17

Harbour’s SB coaxial cables are configured for low attenuation at high frequencies, while using similar dimensions to MIL-DTL-17 constructions. Standard connectors may frequently be used, thereby avoiding tooling charges.

Solid PTFE dielectrics are manufactured with tight tolerances to ensure impedance uniformity and to effect VSWR levels that meet or exceed MIL-DTL-17 specifications for cables of comparable size. The strip braid configuration is by far the most effective means of lowering attenuation levels of coaxial cable at high frequencies while providing shielding effectiveness levels that exceed those of flexible MIL-DTL-17 cables. Flat strips of silver plated copper are braided over the dielectric core, frequently with an intermediate metallized mylar or kapton layer, and an outer round wire braid. This shielding technique provides superior shielding effectiveness and lower transfer impedance than any standard double braided mil-spec construction.

Lighter Weight with Improved Shielding

FEP jackets are typically used, but alternatives are available such as flame retardant PVC and abrasion resistant overall braids. Marker tapes or surface printing are used for positive identification.

Some of the more popular constructions are standard stock items, and many additional cables are available for prototype assemblies. Many cables not referenced are available to meet specific customer requirements.

Cable constructions and physical and electrical characteristics

Part numbers for some of the more common cable constructions are SB316, SB142, SB142i, SB400, and SB393.

   Download physical and electrical characteristics for these products.  

Technical Info
Browse our latest RF Microwave Coaxial Cable technical documents

Attenuation Calculator

Although typical and maximum attenuation values at discrete frequencies may be found in Harbour's online catalog, this Attenuator Calculator makes it easy to compare multiple items at any operating frequency. Just type a frequency in MHz (for instance 18 GHz = 18,000 MHz) to calculate and compare typical attenuation values.

Cable Outer
Maximum Frequency
(dB / 100 ft.)
LL120 .120 18,000
LL160 .160 18,000
LL142 .195 18,000
LL235 .235 18,000
LL335/LL335i .335/.300 18,000
LL142STR .195 18,000
LL270STR .270 18,000
LL450STR .450 13,000
LL480STR .480 11,000
SB316 .098 18,000
SB142/SB142i .195/.172 18,000
SB400 .195 18,000
SB304 .280 18,000
SB393 .390 11,000
SS405 .104 18,000
SS402 .163 18,000
M17/93-RG178 .071 3,000
M17/113-RG316 .098 3,000
M17/128-RG400 .195 12,400
M17/60-RG142 .195 12,400
M17/127-RG393 .390 11,000
SFL405-105Flex .115 18,000
SFL402-105Flex .180 18,000
LLS160 .160 18,000
LLS160-40GHz .160 40,000
LLS195 .195 18,000
LLS195STR .195 18,000
LLS290 .290 18,000
LL142-26GHz .195 26,000
SB142-26GHz .195 26,000
SS402-31GHz .163 31,000
SS405-40GHz .104 40,000
LLS220 .220 18,000

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Item ID -163