Abstract: A towed antenna system employs drop-type dispensing for rapid deployment of a towed element on the end of a cable. The cable has an elastic central conductor, preferably of stranded stainless steel, which stretches to absorb the high tension of the towed element on the cable at the end of payout. The other end of the cable is anchored by a mounting portion in the launcher. A signal is fed from a coaxial signal conductor to the central conductor of the cable by a right-angle feed to a conductive sleeve on the central conductor, in order to avoid placing stress from the cable on the coaxial signal conductor.

Abstract: The microwave radio frequency power divider/combiner comprises a signal input/output matching network coupled between a signal input/output and a central point of the power divider/combiner. M impedance transformer sections are connected in parallel to the central point and radiate outwardly therefrom with each of the M transformer sections having a first predetermined length, where M is integer greater than one. M pairs of impedance transformers sections are provided with each pair being coupled to an end of a different one of the M transformer sections remote from the central point with each of the transformer sections of the M pairs of transformers sections having the first predetermined length. N output/input ports are each coupled to an end of a different one of the transformer sections of the M pairs of transformer sections remote from the M transformer sections. Each of the N ports are matched to a given impedance and N is equal to 2M.

Abstract: This invention relates to a method and apparatus for producing the 135 Hz modulation component which is superimposed as the ninth harmonic on a 15 Hz component thereby producing the normally required Tacan radiation pattern. A cylindrical antenna is employed having located on and around its surface active elements such as dipoles. The 135 Hz component is produced by step-wise rotation of a binary current distribution around the cylindrical array of active elements. Since the system is binary, only two current states are employed, each having a predeterminedamplitude and phase. A predetermined number of the active elements are excited by one of the signals, and the remainder of the elements are excited by the second signal. This excitation is electronically rotated in a non-symmetric manner around the cylindrical array, thereby producing the required 135 Hz component.