Antenna gain is a function of directionality and vice versa. Patch antennas are also good because they have often very low "backward gain" but at the same tim

Antenna gain is a function of directionality and vice versa. Patch antennas are also good because they have often very low "backward gain" but at the same time they are not very directional forward, so they are good to be placed in a corner of a room or near a wall.