Collapsing / extending a coaxial braid...

[Externet]

Good day. In search of your educated opinion...

Imagine a bare coaxial cable without the inner dielectric and conductor; just the braid.
Would changing its lenght by stretching or collapsing behave as an adjustable-resonance antenna lenght, or the braid tiny wires unchanged lenghts and paths contacting themselves would not change its electrical lenght ?

(An equivalent to a plain telescopic antenna) But made with braid. (Has to fit in a curved housing) Never seen a curved telescopic. Have you ?

-Images borrowed from the web-

It is for a curved

 

[PlanarMetamaterials]

It depends on how tight the braid would be. Generally, the braid acts as a shield, so it can be treated as a solid conductor at low microwave frequencies.
In this case, yes, it could act as an adjustable-length antenna. Curving it could be ok, but the degree of curvature will impact antenna performance.