Abstract: An impedance matching device that is particularly suited for high speed, high power applications is disclosed. The impedance matching devices employ magnetic coupling allowing their usage in a "frequency-agile" environments such as communication as well as communication jamming and deception techniques without creating high current, high voltage and thermal conditions that might otherwise damage the related switching devices. The impedance matching device provides a predetermined impedance to transform a load impedance Z.sub.L into a desired characteristic impedance Z.sub.0 over a frequency range having a lower and an upper band. The device comprises one or more first and second inductive components. Each of the first inductive components has an impedance characteristic associated with said lower band, whereas each of the second inductive component has an impedance characteristic associated with the upper band.

Abstract: A transmission line comprising first and second planar dielectric layers. Each layer has a first surface and a second surface. The first surface of each layer has a plurality of electrical conductors thereon defining a center conductor and at least two other conductors, one on either side of and spaced from the center conductor. The second surface of each layer has an electrically conductive ground plane thereon. The first surface of one layer is opposed to the first surface of the other layer, with the conductors on the first surface of the one layer being in registry with and in physical and electrical contact with the conductors on the first surface of the other layer. A plurality of conductors are provided for making electrical contact with the ground planes and each of the at least two conductors for causing the ground planes and each of the at least two conductors to be at substantially the same electrical potential.

Abstract: A coherent optical RF memory has an input circuit for receiving RF input signals having wideband frequency content. An electronically tuned frequency selector selects from the RF input at least one desired RF signal having a desired frequency content for storing in memory. A first transducer responsive to the frequency selector converts the at least one desired RF signal into an optical signal representative of the RF signal. The optical signal is stored in an optical storage device. A second transducer responsive to the optical storage device converts the stored optical signal back to an RF signal, forming a recirculating loop. The desired signal is automatically self-equalized as it recirculates in the loop in order to avoid oscillation while maintaining signal coherency. The desired signal may be used for jamming or deception in electronic warfare (EW) or electronic intelligence (ELINT) systems.

Abstract: A spiral antenna has a plurality of interleaved radiating elements winding outwardly in a spiral pattern about a common axis. The spiral pattern is deformed at outer regions of the antenna to define one or more circumferentially disposed concavities in the body of the antenna. Each concavity is adapted to receive another antenna such as a spiral antenna or horn antenna.