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Harbour Braided Wire Separator

LL (Low Loss) Coaxial Cable - solid center conductors

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Unique cable configuration


The braid configuration and the expanded PTFE dielectrics of the LL cable constructions contribute to lower attenuation levels at higher 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 with an intermediate metalized polyester or polyimide layer, and an outer round wire braid.


Improved electrical characteristics


Harbour’s LL cables with expanded PTFE dielectrics exhibit low coefficients of expansion over the entire operating temperature range from -55° C to +200° C. Impedance discontinuities are minimized at the cable-to-connector interface. Higher levels of power can be transmitted because higher temperatures do not affect the cable due to the thermal stability of the tape. Where phase versus temperature requirements are critical, Harbour’s LL cables allow for an approximately 75% lower phase shift and change in propagation time delay due to temperature. Temperature cycling tests have been performed on a number of Harbour’s cables with positive results.


Lowest attenuation for any given size


Harbour’s LL coaxial cables, with expanded PTFE dielectrics and strip braid composite configurations, offer attenuation from 20 to 35% below other mil spec cables of comparable size. When size and weight are considerations, Harbour’s LL cables should be considered. 


Cable constructions and physical and electrical characteristics


Special constructions are the norm rather than the exception, so please make sure you contact Harbour Industries sales@harbourind.com if you don’t see the specific construction for your application.  Part numbers for some of the more common cable constructions are LL120, LL160, LL142, LL235, LL335, and LL335i.


   Download physical and electrical characteristics for these products.  


View a listing of connector manufacturers that mate with Harbour's LL (Low Loss) cables on the Industry Links page.

Resources

Attenuation Calculator
Instantly calculate attenuation values using our online tool

Catalog Download
Download our latest RF Microwave Coaxial Cable catalog (PDF)

 

Technical Info
Browse our latest RF Microwave Coaxial Cable technical documents

Interactive Aircraft
Electrical Wiring Interconnect Systems Applications in commercial aircraft.

 
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
Diameter
(inches)
Maximum Frequency
(MHz)
Attenuation
(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

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