(57) An improved method for making a flexible coaxial cable having an inner conductor
(36) to which a dielectric material is secured to form a dielectric core (30) for
the coaxial cable (38), and a flexible outer conductor (50) such as one formed from
a strip helically wound conductor (58), employs a solid dielectric starting material
(32), such as a spline dielectric or a cylindrical dieletric or an expanded dielectric,
which is controllably cut, such as by saw blades (34), using a desired cutting angle
(ϑ) and blade width (α), in order to cut away a predetermined amount of the solid
dielectric starting material (32) to provide a shaped dielectric core (30), such as
a spiral or helix (30a, 30b), from the solid dielectric starting material (32). The
resulting core (30), such as single or double helix (30a, 30b), which has a predetermined
pitch which provides a desired predetermined velocity of propagation and impedance
for the coaxial cable (38), is inserted into the convoluted outer conductor (50) to
produce a fast cable (38) without any locking of the core (30) to the outer conductor
(50).
|
|
