The environments in which microwave cable assemblies are being used today are becoming more challenging with exposure to such conditions as extreme temperatures, chemicals, abrasion, and flexing. Additional challenges include the need for smaller, lighter packaging for cable systems that last longer and cost less. To ensure signal integrity and product reliability, it is essential to identify the electrical, mechanical, environmental, and application-specific constraints that can affect the cable’s overall performance. These variables have a direct impact on the materials used for cable dielectric and jacketing as well as the construction of the cable. Also, testing and data analysis are key to ensuring that the cable will, in fact, perform reliably in a specific environment.