Harbour RF Microwave LL Coaxial Cable Stranded Center Conductors

Harbour RF Microwave LL Coaxial Cable Stranded Center Conductors

Select gauge from drop-down menu for prices:

Harbour RF Microwave LL Coaxial Cable Stranded Center Conductors

Product Details

Center Conductor: Stranded silver plated copper
Dielectric: Expanded PTFE tape
Inner Braid: Flat silver plated copper strip
Interlayer: Aluminum polyester or polyimide tape
Outer Braid: Round silver plated copper
Jacket: FEP, translucent colors, solid colors or clear
Operating temperature: -55 +200° C
Velocity of Propagation: 80%-83%
Impedance: 50 Ohms
Capacitance: 25.0 pF/ft
Shielding Effectiveness: <-95 db

Center conductor
diameter (in.)
Dielectric
diameter (in.)
Bend
radius (in.)
Part Number Action
.051 (7/.017) .138 1.0 LL142STR Request A Quote
.068 (7/.023) .185 1.4 LL270STR Request A Quote
.133 (7/.048) .360 2.5 LL450STR Request A Quote
.160 (7/.054) .420 2.7 LL480STR Request A Quote

Attenuation (dB/100ft) @ Typ Typ Typ Typ
400 MHz 6.0 4.1 2.3 1.9
1 GHz 9.5 6.6 3.7 3.1
2 GHz 13.5 9.5 5.3 4.5
3 GHz 16.6 11.6 6.6 5.6
5 GMHz 21.7 15.1 8.7 7.5
10 GHz 31.2 21.8 12.8 11.2
18 GHz 42.7 29.9 - -

Flexibility with stranded center conductors: Harbour’s Low Loss coax designs with stranded center conductors are more flexible than similar designs with solid center conductors. Low loss cables with stranded center conductors exhibit attenuation slightly higher than comparable solid center conductor designs; however, unique composite braid configurations and expanded PTFE dielectrics result in attenuation lower than MIL-DTL-17 cables of comparable size. Shielding effectiveness levels also exceed those of flexible MIL-DTL-17 constructions.

Excellent electrical characteristics: All of 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.

Attenuation Calculation and K Factors: Although typical and maximum attenuation values are given for discrete frequencies, typical attenuation values may be calculated by using K1 and K2 factors for each construction. The K1 factor is calculated by taking into consideration the type, strand factor, and diameter of the center conductor, and the impedance of the cable. The K2 factor is calculated by taking into consideration the velocity of propagation and the dissipation factor of the dielectric.

Formula for Calculating Attenuation using K Factors: Attenuation (dB/100 ft) at any frequency (MHz) = (K1 x root of frequency + (K2 x frequency)

- LL142STR LL270STR LL450STR LL480STR
K1 .294 .204 .112 .091
K2 .0001785 .000143 .00016 .00021

QUESTIONS & ANSWERS

Have a Question?

Be the first to ask a question about this.

Ask a Question