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  • 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.
    • Unit of Measure

    Specifications

    Conductor

    		 N/A Solid Silver Plated Copper

    Outer Diameter Conductor

    		 N/A 0.089 ± 0.001 in

    Dielectric

    		 N/A PTFE Tape

    Outer Diameter Dielectric

    		 N/A 0.250 ± 0.005 in

    Inner Braid

    		 N/A Flat Silver Plated Copper
    90% min. coverage

    Outer Diameter Inner Braid

    		 N/A 0.255 ± 0.005 in

    Inner Shield

    		 N/A Aluminum Polyster

    Outer Diameter Inner Shield

    		 N/A 0.261 ± 0.005 in

    Outer Braid

    		 N/A Round Silver Plated Copper
    90% min. coverage

    Outer Diameter Outer Braid

    		 N/A 0.277 ± 0.005 in

    Jacket

    		 N/A Green Tint FEP

    Outer Diameter Jacket

    		 N/A 0.300 ± 0.005 in

    Marker Tape

    		 N/A Harbour Industries LL335i

    Nom. Weight per 1000 ft.

    		 N/A 76.0 lb

    Min. Bend Radius

    		 N/A 1.5 in

    Min. Continous Length

    		 N/A 50 ft

    Put-up

    		 N/A 18" wood, (1) length per spool

    Operating Temprature Rating

    		 N/A -55 to 200 ºC

    RoHS Compliance

    		 N/A Complies with RoHS (Directive 2002/95/EC)

    Electrical Characteristics

    Impedance

    		 N/A 50 ohms ± 2

    Nom. Capacitance

    		 N/A 24.5 pF/ft

    Nom. Velocity of Propagation

    		 N/A 83.0 %

    VSWR (Max 400 MHz to 18 GHz)

    		 N/A 1.35:1

    Typical Attenuation @ 100 ft.

    		 N/A 11.3 dB @ 5.00 GHz 17.1 dB @ 10.00 GHz 22.4 dB @ 18.00 GHz 3.1 dB @ 0.40 GHz 4.9 dB @ 1.00 GHz 8.5 dB @ 3.00 GHz

    Max. Attenuation @ 100 ft.

    		 N/A 12.5 dB @ 5.00 GHz 19.0 dB @ 10.00 GHz 26.0 dB @ 18.00 GHz 3.5 dB @ 0.40 GHz 5.5 dB @ 1.00 GHz 9.5 dB @ 3.00 GHz

    Test Method

    Test Points

    		 N/A 801

    IF Band Width

    		 N/A 35 kHz

    Sweep Time

    		 N/A 6 s

    Test Length

    		 N/A 6 ft

    Connector Type

    		 N/A Male SMA Plug

    Sampling Plan

    		 N/A Per Mil-STD-105

    k1

    		 N/A 0.149

    k2

    		 N/A 0.0001674
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