Micro_Coax is the world's best supplier for all of your high performance cable assembly and cable needs.  Their UTiFlex and UTiForm cables are world renowned for their quality and performance.  In fact Micro-Coax manufacturers their own semi-rigid cable.  Did you know that almost all cable assembly suppliers buy their cable from someone else? Micro-Coax makes their own custom connectors to assure unsurpassed performance and reliability while guaranteeing excellent phase matching and phase stability, even with flexure.  Micro-Coax is also one of the best at cables assemblies for Space applications as well as Military, Commercial and lab cables, including VNA cable assemblies.  You can even specify and buy your cable assemblies on the WEB at the Micro-Coax Web Store.