No particular type in mind, the used antennas I have inquired about all are made of segments of perforated metal plates. Perforation with holes of about 0.1-inch diameter. Do they offer the same effective gain as solid antennas of same type?
A mesh dish will not perform as well as as a solid at Ku for three reasons
1) The design of the segmented antenna for mesh usually means the parabola is formed by compression in the frame, rather than by manufacturing process, leading to performance as a result of quality of installation.
2) The flexibility of the antenna surface under normal wind conditions, the parabola has a built in distortion, better for survivability, but not for performance
3) The mesh holes can affect signal through aberations and breakthrough of undesirable noise from the rear of the reflector
If you calculate about 75% of the efficiency of a solid dish, you wont be far off.