Antenna arrangement

An antenna arrangement comprises a patch conductor ( 102 ) supported substantially parallel to a ground plane ( 104 ). The patch conductor includes first ( 106 ) and second ( 108 ) connection points, and further incorporates a slot ( 202 ) between the first and second points. The antenna can be operated in a first mode when the second connection point is connected to ground and in a second mode when the second connection point is open circuit. By connection of a variable impedance ( 514 ), for example a variable inductor, between the second connection point and the ground plane, operation of the arrangement at frequencies between the operating frequencies of the first and second modes is enabled.