A charging device for wireless charging at least one electric device, the charging device comprising a housing containing an antenna arrangement which comprises at least one radiating antenna, wherein: said housing is substantially hollow defining an inner cavity for propagation of predetermined electromagnetic radiation from said antenna arrangement; said housing comprises an inner surface thereof configured to define said inner cavity, the geometry and material composition of said inner surface being selected to define a general propagation path for the predetermined electromagnetic radiation from said antenna arrangement towards a charging zone inside the housing, such that said inner cavity operates as a waveguide for directionally guiding said predetermined electromagnetic radiation to said charging zone and enabling the creation of a volume of maximal intensity of said electromagnetic radiation within at least a part of said charging zone, while substantially preventing said predetermined radiation from escaping the housing; wherein the antenna arrangement is characterized in at least one of the following ways: said antenna arrangement comprises a plurality of antennas and is operable to create a predetermined phase pattern of the radiation emitted by the plurality of antennas to provide the maximal intensity within at least a part of the charging zone; said antenna arrangement comprises a plurality of antennas operable by a switching unit according to a predetermined time pattern to thereby provide a predetermined phase pattern of the radiation emitted by the antennas to provide the maximal intensity within at least a part the charging zone; and said antenna arrangement is associated with a frequency controller to thereby enable controllable variation of a frequency of said electromagnetic radiation, thereby providing at least partial overlap between the volume of the maximal intensity of the electromagnetic radiation and at least a part of the charging zone. said housing is substantially hollow defining an inner cavity for propagation of predetermined electromagnetic radiation from said antenna arrangement; said housing comprises an inner surface thereof configured to define said inner cavity, the geometry and material composition of said inner surface being selected to define a general propagation path for the predetermined electromagnetic radiation from said antenna arrangement towards a charging zone inside the housing, such that said inner cavity operates as a waveguide for directionally guiding said predetermined electromagnetic radiation to said charging zone and enabling the creation of a volume of maximal intensity of said electromagnetic radiation within at least a part of said charging zone, while substantially preventing said predetermined radiation from escaping the housing; said antenna arrangement comprises a plurality of antennas and is operable to create a predetermined phase pattern of the radiation emitted by the plurality of antennas to provide the maximal intensity within at least a part of the charging zone; said antenna arrangement comprises a plurality of antennas operable by a switching unit according to a predetermined time pattern to thereby provide a predetermined phase pattern of the radiation emitted by the antennas to provide the maximal intensity within at least a part the charging zone; and said antenna arrangement is associated with a frequency controller to thereby enable controllable variation of a frequency of said electromagnetic radiation, thereby providing at least partial overlap between the volume of the maximal intensity of the electromagnetic radiation and at least a part of the charging zone.