Abstract: The invention relates to an HF terminating impedance in strip conductor technique in which the resistive layer is enclosed between two ceramic plates which are clamped from the outside by metallic heat dissipating plates, the freedom from reflection of the terminating impedance being ensured by the lateral edge lines of the resistive layer satisfying the condition ##EQU1## To ensure an intimate heat conduction contact between the resistive layer and the ceramic plates and the ceramic plates and the adjoining clamping plate without introducing bending stresses into the ceramic plates which might cause fracture, at the contact surfaces a soft metal foil, preferably of lead, is inserted which is prevented from cold flow by a rolled-in grating or netting, in particular of bronze or copper.

Abstract: A step change in the diameter of the inner conductor or the outer conductor of the transmission line with absorptive material having a shoulder abutting against the step change and tapering toward the opposite conductor with the radius of the absorptive material at the step change being sufficient to provide a characteristic impedance substantially equal to the characteristic impedance of the coaxial transmission line prior to the step change.

Abstract: A small variable resistor is used as a precision terminating resistor in an integrated circuit interconnection structure. The structure involves the use of a driver circuit connected to and driving a plurality of loads which are connected to a transmission line. The transmission line is terminated by the precision variable terminating resistor. The last load in the series of loads is located in the integrated circuit chip which has the variable terminating resistor. The absolute value of the variable resistor is difficult to control. The absolute value of any conventional integrated resistor is hard to control in manufacturing. However, by making the value of the resistance proportional to a voltage which itself is proportional to a deviation from a reference voltage, it is possible to obtain a much more precise value of resistance.

Abstract: A microwave terminating structure is disclosed wherein a strip conductor formed on a dielectric support has one end adapted for coupling to a transmission line being terminated and a resistive load, disposed on the dielectric support, connected between the ends of the strip conductor. Disposed on one side of the dielectric support is a ground plane for the strip conductor. With such arrangement, the resistive load is disposed on the surface of the dielectric support enabling the substantially planar structure to be formed.

Abstract: Coaxial microwave attenuator for use at high power, which is independent of the frequency being transmitted. The attenuator comprises a series of conical absorption members assembled to obtain the desired attenuation.

Abstract: A radiator for dissipating heat transferred from a liquid cooling medium contained therein and that circulates by convection around and absorbs heat energy from an internal heat source. The radiator has a housing that contains the liquid cooling medium and that has two upright end walls and four finned rectangular side walls that define a prism of advantageous aerodynamic form supported with its axis horizontal. The four side walls of the prism intersect in a horizontal plane and a vertical plane, both of which form diagonal planes of the prism. The finned side walls are adapted to transfer heat energy to the surrounding atmosphere and to establish convective flow in paths with minimum flow resistance, that extend upwardly from the intersection of the two lower side walls (i.e., at the nose of the aerodynamic form) at the bottom of the housing and across the entire surface area of the finned side walls to absorb heat energy transmitted to the finned walls by the liquid medium.

Abstract: An electrical signal transmission line connector having a switch-selectable termination resistor within the connector body. Use of the connector at the output of a signal acquisition probe allows it to be used with electrical instruments, such as oscilloscopes, having different input impedances.

Abstract: A microwave low pass harmonic absorber having a main waveguide which passes a desired fundamental frequency. A plurality of shunt waveguides are disposed on the walls of the main waveguide for providing an absorptive path for the harmonic energy. Each of the shunt waveguides includes at least one ridge for lowering the cutoff frequency of the shunt waveguide. In another embodiment, the shunt waveguides include two ridges disposed opposite each other.

Abstract: A method and device for absorbing microwave energy avoid the expense and bulk of prior art arrangements, and provide greater efficiency, by forming a flame in the path of the microwave and supplying a seeding substance into the flame to produce a plasma flame column which absorbs the microwave. The seeding substance is preferably an alkali salt solution, e.g. KNO.sub.3.

Abstract: A.C. grounded termination networks having multi-octave bandwidth capacity are provided in printed rf circuit form (e.g., microstrip, stripline) by fabricating a distributed element network as a series of alternating resistor-conductor elements having different circuit parameters. The circuit parameters are computed using an "exhaustive search" procedure involving computer optimization of the chain matrix equivalent expression of the voltage reflection coefficient for the network.

Abstract: A waveguide matched load device comprising a short-circuited rectangular tion with an energy absorbing material located approximately 1/4 of a wavelength from the short-circuited end.

Abstract: Disclosed is a terminator for a transmission line including first and second diodes connected in a series path having a common node therebetween connected to the transmission line. A potential supply connected across the terminal ends of the series connected diodes reverse biases them into their high impedance state.

Abstract: A microwave termination for dissipating substantially all of the energy transmitted through a coaxial line structure which has a body adapted to be connected to the outer conductor of the coaxial line, a center conductor adapted to be connected to the inner conductor of the coaxial line, a dielectric member disposed between the center conductor and the body for maintaining the center conductor coaxially disposed relative to the body, and a cylindrically shaped resistor radially disposed within the body so as to be in electrical contact with the body at its opposite ends and with the center conductor at a central portion thereof. The resistor has a resistive coating which absorbs the energy received by the termination from the coaxial line.

Abstract: An improved directional antenna for use in an airborne vehicle is shown. The contemplated antenna includes a planar phased array of antenna elements mechanically rotatable about an axis of rotation, the plane of such array making an acute angle with such axis. The beam from such array may be electronically scanned, within wide limits, regardless of the orientation of the phased array. Also shown is an improved constrained centerfeed for the antenna elements in each row thereof in such array, the disclosed feed incorporating a double ladder arrangement, including wideband couplers, to permit the extensive use of stripline and at the same time to allow practically independent adjustment of azimuth and elevation difference patterns when the phased array is used as an element in a monopulse system.

Abstract: A transmission line transition for coupling together a coaxial transmission line and a parallel plane radial transmission line, the transition including upper and lower circular plates having conforming inner curved surfaces spaced from each other to define an air dielectric transmission line comprising, in succession, a coaxial air line section, a transition air line section, and a radial air line section.