A tunable delay circuit assembly (100; 200) for controllably delaying signals that propagate along a transmission line, the circuit assembly comprising: an elongated conductor (102; 202) extending in a first direction, the elongated conductor configured to carry the signals; a first elongated ground plane conductor (104; 204) extending in the first direction; and a second elongated ground plane conductor (106; 206) extending in the first direction; wherein said elongated conductor carrying the signals, the first elongated ground plane conductor and the second elongated ground plane conductor form said transmission line; and at least one floating strip, each floating strip comprising; a first elongated conductive segment (108; 208) having a first centerline, wherein the first centerline is not parallel to the first direction; a second elongated conductive segment (110; 210) having a second centerline, wherein the second centerline is not parallel to the first direction; a third elongated conductive segment (112; 212) extending along a third centerline; a first switch coupled between the first segment and the second segment; a second switch coupled between the first segment and the third segment; wherein the first switch, in a first position, is configured to connect the first segment to the second segment; wherein the first switch, in a second position, is configured to electrically isolate the first segment from the second segment; wherein the second switch, in a first position, is configured to connect the first segment to the third segment; wherein the second switch, in a second position, is configured to electrically isolate the first segment from the third segment; and wherein the at least one floating strip is electrically isolated from other components of the circuit assembly. an elongated conductor (102; 202) extending in a first direction, the elongated conductor configured to carry the signals; a first elongated ground plane conductor (104; 204) extending in the first direction; and a second elongated ground plane conductor (106; 206) extending in the first direction; wherein said elongated conductor carrying the signals, the first elongated ground plane conductor and the second elongated ground plane conductor form said transmission line; and at least one floating strip, each floating strip comprising; a first elongated conductive segment (108; 208) having a first centerline, wherein the first centerline is not parallel to the first direction; a second elongated conductive segment (110; 210) having a second centerline, wherein the second centerline is not parallel to the first direction; a third elongated conductive segment (112; 212) extending along a third centerline; a first switch coupled between the first segment and the second segment; a second switch coupled between the first segment and the third segment; wherein the first switch, in a first position, is configured to connect the first segment to the second segment; wherein the first switch, in a second position, is configured to electrically isolate the first segment from the second segment; wherein the second switch, in a first position, is configured to connect the first segment to the third segment; wherein the second switch, in a second position, is configured to electrically isolate the first segment from the third segment; and wherein the at least one floating strip is electrically isolated from other components of the circuit assembly.