Abstract: Disclosed are methods and apparatus for treating weeds, and more specifically treating weeds by use of microwaves.

Abstract: A mobile microwave system and method for controlling the growth of weeds present in soils, such as those of agricultural fields includes a microwave unit having a microwave generator for generating microwaves within a frequency range suitable for controlling weed growth. A phased array antenna system includes a plurality of antenna elements for emitting a focused microwave beam within a target area. At least one controllable phase shifter is coupled between the microwave unit and the plurality of antenna elements. The phase shifter is configured for shifting a microwave phase of a part of the microwaves in order to adjust a direction of the emitted microwave beam. The microwave beam direction is steerable to align the target area with a position of a target weed plant. The system is mountable to a vehicle or includes a drive for moving the system.