Having just read something on dielectric constant and dielectric loss, you were expected to pick up from the data sheet that this material is substantially different from FR-4, with a dielectric constant of 3.00, and a dissipation factor of 0.0013 as measured at 10 GHz. In other words, this material has been created for use at microwave frequencies.
Other key features are that the dielectric constant is tightly controlled, whereas FR-4 may be expected to have considerable dispersion characteristics, and a degree of anisotropy. Also, if you need to operate over an extended temperature range, the dielectric constant is substantially constant with temperature, whereas materials made with woven glass may vary a percent or so either way over an extended temperature range.
The material also has a dielectric constant which is substantially frequency independent.
Don’t worry if you didn’t get every aspect of this answer, but be aware that real data sheets contain a lot of information which will impact on differing aspects of your design.
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