A parallel-fed loop antenna in an electronic device having a periphery, comprising: an antenna feed that includes first and second antenna feed terminals (58, 54); a conductive loop coupled between the first and second antenna feed terminals (58, 54), wherein the conductive loop is formed at least partly from conductive structures disposed along the periphery; and a variable inductor that bridges the first and second antenna feed terminals (58, 54), characterised in that the variable inductor is coupled in parallel between the first and second antenna feed terminals, wherein the variable inductor comprises: a first inductive segment that runs parallel to a ground plane edge, wherein the first segment forms a part of a first transmission line path with a first inductance and a first length; and a second inductive segment (SG') that runs parallel to a ground plane edge, wherein the second segment and the first segment form a part of a second transmission line path with a second inductance and a second length that is different from the first length, wherein the variable inductor comprises an inductor and a switch that are connected in series with the first segment between the first and second antenna feed terminals (58, 54) and wherein the second segment (SG') and the switch are coupled in parallel. an antenna feed that includes first and second antenna feed terminals (58, 54); a conductive loop coupled between the first and second antenna feed terminals (58, 54), wherein the conductive loop is formed at least partly from conductive structures disposed along the periphery; and a variable inductor that bridges the first and second antenna feed terminals (58, 54), characterised in that the variable inductor is coupled in parallel between the first and second antenna feed terminals, wherein the variable inductor comprises: a first inductive segment that runs parallel to a ground plane edge, wherein the first segment forms a part of a first transmission line path with a first inductance and a first length; and a second inductive segment (SG') that runs parallel to a ground plane edge, wherein the second segment and the first segment form a part of a second transmission line path with a second inductance and a second length that is different from the first length, wherein the variable inductor comprises an inductor and a switch that are connected in series with the first segment between the first and second antenna feed terminals (58, 54) and wherein the second segment (SG') and the switch are coupled in parallel. a first inductive segment that runs parallel to a ground plane edge, wherein the first segment forms a part of a first transmission line path with a first inductance and a first length; and a second inductive segment (SG') that runs parallel to a ground plane edge, wherein the second segment and the first segment form a part of a second transmission line path with a second inductance and a second length that is different from the first length, wherein the variable inductor comprises an inductor and a switch that are connected in series with the first segment between the first and second antenna feed terminals (58, 54) and wherein the second segment (SG') and the switch are coupled in parallel.