MODAL TRANSMISSION METHOD AND APPARATUS FOR MULTI-CONDUCTOR WIRELINE CABLES

摘要

Apparatus and methods are disclosed for transmitting multiple, independent electrical signals over a conventional wireline logging cable while avoiding the bandwidth limitations encountered with customary schemes. Each signal is carried on a plurality of conductor pairs (e.g., two pairs) arranged symmetrically such that the net signal coupled into non-involved conductors is zero. With no coupling, frequency-dependent mutual impedance losses are effectively eliminated.