A mobile-platform RF antenna and coax installation must be specified as one installed path from the radiating element and its ground plane or counterpoise to the electronics reference plane. Record antenna type, polarization, pattern objective, mounting height and orientation, radome, body cutout, keep-out region, nearby metal and antennas, feedthrough, surge or ESD protection, filter or bias components, cable segments, adapters and service loop. State which configuration represents the final roof, mast, hull, vehicle body or airframe installation.
For the coaxial path, freeze construction, length, velocity factor where timing matters, loss, return loss or VSWR, power, phase or delay stability, temperature range, bend radius, flexure, clamp spacing, strain relief, connector family, plating, sealing, torque, drainage, abrasion protection and mating-cycle limit. Allocate each value at named reference planes and include adapters and protection devices. A short straight bench cable is not an acceptable substitute for the routed installed assembly.
Verify mechanical inspection, connector torque, continuity and bond first; then measure end-to-end loss, match, delay or phase where required, antenna pattern or coverage in a representative body configuration, and simultaneous-radio blocking or intermodulation. Repeat the relevant checks after environmental exposure and after a representative remove-and-replace cycle. Retain antenna, cable and connector part identity, route drawing, photos without people where useful, raw data and replacement triggers.