Fast variable RF network inductor

An inductor network for connection to an RF source, the network providing variable inductance by the shorting of inductor increments which are connected in series, comprising:

• a D.C. ground;
• a plurality of inductor core means;
• a plurality of switch means;
• a plurality of coaxial cables, each comprising an inner conductor and an outer conductor, and being separated from each other by a dielectric;
• the outer conductors for connection to said RF ground and RF source, the plurality of outer conductors being in common electrical contact with one another to form a common conductor;
• the plurality of inner conductors and plurality of outer conductors forming a continuous cable wound at intervals about each said inductor core means to form a plurality of inductors, an inner conductor being terminated to form a connection point at a predetermined position in relation to said inductor core means;
• and
• switch means connected to said common conductor on either side of at least one of said inductor core means and to said connection point, said switch means being responsive to control signals applied to said connection point for selectively shorting the inductor formed on said at least one inductor core means out of said network.