LL (Low Loss) Coaxial Cables
Coaxial and Data Cables
Unique cable design: 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-C-17 cables. Flat strips of silver plated copper are braided over the dielectric core with an intermediate metallized polyester or polyimide layer, and an outer round wire braid.
Improved electrical characteristics: LL cables with expanded PTFE dielectrics exhibit low coefficients of expansion over the entire operating temperature range from -100° C to +250° 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 temperature stability of the tape. Where phase versus temperature requirements are critical, 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 cables with positive results.
Lowest attenuation for any given size: 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, LL cables should be considered. The graph below defines maximum attenuation levels for all LL cables referenced on the next page.
Technical support available: We continually work with cable assembly houses and connector manufacturers to ensure maximum system reliability. Cable designs take into consideration size and weight constraints, existing connector availability and termination techniques. Sources of supply for connectors operative to 18 GHz may be recommended.
Many special constructions available: The chart on the following page outlines just a few designs we have manufactured. Some of the more popular constructions are standard stock items, and many additional cables are available for prototype assemblies. Additional cables not referenced here are available to meet specific customer requirements.
Item # |
Center Conductor |
Dielectric Diameter |
Diameter Over Inner Braid |
Diameter Over Outer Braid |
Overall Diameter |
Weight |
---|---|---|---|---|---|---|
LL120 | Center Conductor N/A 0.0285 inch Solid | Dielectric Diameter N/A 0.080 in | Diameter Over Inner Braid N/A 0.086 in | Diameter Over Outer Braid N/A 0.108 in | Overall Diameter N/A 0.120 in | Weight N/A 17.00 lb/1000 ft. |
LL142 | Center Conductor N/A 0.051 inch Solid | Dielectric Diameter N/A 0.145 in | Diameter Over Inner Braid N/A 0.152 in | Diameter Over Outer Braid N/A 0.174 in | Overall Diameter N/A 0.195 in | Weight N/A 44.0 lb/1000 ft. |
LL235 | Center Conductor N/A 0.057 inch Solid | Dielectric Diameter N/A 0.160 in | Diameter Over Inner Braid N/A 0.170 in | Diameter Over Outer Braid N/A 0.191 in | Overall Diameter N/A 0.235 in | Weight N/A 48.0 lb/1000 ft. |
LL393-2 | Center Conductor N/A 0.068 inch (7/0.023 inch) | Dielectric Diameter N/A 0.185 in | Diameter Over Inner Braid N/A 0.195 in | Diameter Over Outer Braid N/A 0.220 in | Overall Diameter N/A 0.270 in | Weight N/A 70.0 lb/1000 ft. |
LL450 | Center Conductor N/A 0.133 inch (7/0.048 inch) | Dielectric Diameter N/A 0.360 in | Diameter Over Inner Braid N/A 0.368 in | Diameter Over Outer Braid N/A 0.394 in | Overall Diameter N/A 0.450 in | Weight N/A 180.0 lb/1000 ft. |
LL285 | Center Conductor N/A 0.089 ± 0.001 in | Dielectric Diameter N/A 0.245 ± 0.005 in | Diameter Over Inner Braid N/A 0.250 ± 0.005 in | Diameter Over Outer Braid N/A 0.264 ± 0.005 in | Overall Diameter N/A 0.285 ± 0.005 in | Weight N/A 74.0 lb/1000 ft. |
LLS290 | Center Conductor N/A 0.089 ± 0.001 in | Dielectric Diameter N/A 0.246 ± 0.005 in | Diameter Over Inner Braid N/A 0.252 ± 0.005 in | Diameter Over Outer Braid N/A 0.265 ± 0.005 in | Overall Diameter N/A 0.290 ± 0.010 in | Weight N/A 72.0 lb/1000 ft. |
LL305 | Center Conductor N/A 0.091 ± 0.004 in | Dielectric Diameter N/A 0.246 ± 0.005 in | Diameter Over Inner Braid N/A 0.256 ± 0.005 in | Diameter Over Outer Braid N/A 0.276 ± 0.005 in | Overall Diameter N/A Max. 0.305 in | Weight N/A 74.0 lb/1000 ft. |
LL465 | Center Conductor N/A 0.155 ± 0.0015 in | Dielectric Diameter N/A 0.405 ± 0.005 in | Diameter Over Inner Braid N/A 0.418 ± 0.005 in | Diameter Over Outer Braid N/A 0.435 ± 0.005 in | Overall Diameter N/A 0.465 ± 0.010 in | Weight N/A 174.0 lb/1000 ft. |
LL335i | Center Conductor N/A | Dielectric Diameter N/A | Diameter Over Inner Braid N/A | Diameter Over Outer Braid N/A | Overall Diameter N/A | Weight N/A |