A variable time delay network (210) includes segments (270, 260) which are
connected in parallel to form variable time delay network (210). Segment
(270) includes a varactor diode (222) and an inductive element (223)
connected in series at an anode electrode (290) of varactor (222). A
cathode electrode (291) of varactor diode (222) connected to a node (220).
Segment (260) includes a varactor (221) and a bypass capacitor (224)
connected in series at a cathode electrode (292) of varactor (221).
Cathode electrode (292) is connected at a node (225). An anode electrode
(293) of varactor (221) connected to node (220). The impedance at node
(220) presented to a signal that is to be time delayed remains constant at
the center frequency of the signal via a bias voltage applied at node
(225) while controlling and changing the time delay of the signal via a
bias voltage applied at node (220).