Radio Frequency cables are essential for mission-critical applications associated with radar, communication, and navigation systems which may be ground-, sea-, or space-based. Harsh environments can limit data transmission or damage the cables during a mission. Multiple options are offered to help ruggedize cables to excel in challenging conditions.
Typical cable configuration
A. Inner Conductor, B. Dielectric, C. First Outer Shield
D. Second Outer Shield, E. Third Outer Shield, F. Jacket
Cable options include:
Armorized & Weatherized Protective Covering:
Flexible stainless-steel or monocoil armor can be is installed over the jacket of the cable and locked in place from connector to connector. This prevents damage to the cable from being stepped on or run over by light equipment and prevents cable kinking throughout the assembly. In addition, PVC or silicone jackets can be extruded over the entire length of the stainless-steel armor, to prevent dirt, water, and other elements from penetrating into the armor.
Cable with stainless-steel amortization
Dust Caps:
High grade metallic dust caps help protect connector mating faces from contaminates and water ingress in harsh environments when cables are not in use. They also prevent physical damage to mating pins during transportation and storage while not in use.
Cable with Dust cap
Extended and High Temperature Boots:
The Extended Boot protects the cable from kinking at the cable-to-connector termination. This method uses layers of different lengths of shrink tubing. This will distribute the force applied to the cable-to-connector termination over a 3–5-inch (7-13cm) length of cable, depending on cable diameter. This method of additional strain relief is available on all flexible cable assemblies made by Smiths Interconnect. In addition, high temperature booting can extend the temperature range of cables to 200 deg C and higher for brief periods.
Cable with high temperature boot wrap
Water proofing:
Various degrees of water proofing can be accomplished to meet the current IP specifications with either a fluorelastomer or epoxy product. High flexure cable to connector junctions can be sealed to IP67 when needed.
In summary, ruggedizing cables can help extend the life and increase performance of RF cables. Mission-critical systems are exposed to different harsh environments, high level of radiation, intense heat, extreme cold, strong wind, heavy rain, or snow and extreme vibration. Providing a high-quality RF/microwave transmit signal is crucial for all mission-critical RF electrical systems. Smiths Interconnect provides industry-leading cable solutions and services, working closely with customers across a broad portfolio of applications to build cable assemblies that meet the customer’s specific requirements.