front to back ratio

In general, the larger the front to back ratio, the less likely the antenna is to cause interference.

In point-to-point microwave antennas, a "high performance" antenna usually has a higher front to back ratio than other antennas.

Other factors affecting the front to back ratio of a parabolic microwave antenna include the material of the dish and the precision with which the reflector itself was formed.

In other electrical engineering the front to back ratio is a ratio of parameters used to characterize rectifiers or other devices, in which electrical current, signal strength, resistance, or other parameters, in one direction is compared with that in the opposite direction.

For example, an unshrouded 38 GHz microwave dish may have a front to back ratio of 64 dB, while the same size reflector equipped with a shroud would have a front to back ratio of 70 dB.