Yes there is. In combat turn your weapon settings on beam weapons to only target PD, as well as your missiles, which can also shoot down enemy missiles, but not very efficiently. Neutron beams work great though as do some laser weapons put on PD mode. (Xray Beamers). The only downside is you have to swap them between PD and ALL on targeting (or whatever your choice is.)
Shields are also a excellent alternative.