Abstract: An electrical switching device and related methods, for use in aerospace applications include a first static contact assembly, a second static contact assembly, a movable contact assembly for making an electrical connection between the first and second static contact assemblies. The first contact assembly, the second contact assembly and the movable contact assembly each include a silver contact that is percussion welded to the aluminum substrate. Before percussion welding, the silver contact includes a projection for focusing an arc during percussion welding.

Abstract: A Spatial Power Combining Amplifier (SPCA) exhibiting a new concept for the amplification of coherent (e.g., microwave) radiation. A general description of the SPCA a power analysis at various SPCA stages is provided. A successfully tested S-band SPCA example was able to deliver 120 W of power with a gain of 50 dB and 50 percent efficiency.

Abstract: A discrete monotron oscillator for use in a high power microwave device is formed with a microwave oscillator having a half-wavelength resonant coaxial microwave cavity operating in fundamental TEM mode for microwave oscillation with an inner conductor defining a drift tube for propagating an electron beam and an outer conductor coaxial with the inner conductor. The inner conductor defines a modulating gap and an extraction gap downstream of the modulating gap. The modulating gap and the extraction gap connect the coaxial microwave cavity with the drift tube so that energy for the microwave oscillation is extracted from the electron beam at the extraction gap and modulates the electron beam at the modulating gap. For high power operation, an annular electron beam is used.

Abstract: Five CMOS inverters are connected in a series ring to form an oscillator. Current to the inverters is controlled to establish gate delays of the inverters and thereby determine a frequency of oscillation of the oscillator. The oscillator is included in a phase locked loop where the gate delay of the inverters is selected by selecting the value of a frequency divider of the phase locked loop. The selected delay is used to form a train of pulses with a desired duty cycle.

Abstract: A X-ray emissive vacuum tube is fully enclosed in an electrically conductive casing with electrical terminals through which bias potentials are applied to the tube. Occasionally an arc discharge occurs between electrodes within the tube generating a high frequency signal which ordinarily resonates with the conventional casings. However a resistive coating is applied to the inner surface of the case. That coating has a resistivity sufficient to lower the Q of the case to a value at which significant ringing does not result from the discharge.

Abstract: A broadband, varactor-tuned shorted coax resonator is provided with a single point coupling port that facilitates coupling of discrete circuitry to the distributed resonator. The coupling port is defined by adding a second shorted coax line across the end of the first. The outer conductors of the two lines are interconnected. The inner conductors of the two lines are serially coupled and define a coupling gap, either along their length or at their ends, across which discrete circuitry can be connected. In a preferred form of the invention, the discrete circuitry is positioned in a region within the periphery of one of the inner conductors in order to provide an electromagnetic shield for the circuitry.

Abstract: A mm wavelength power combiner comprising an open resonator comprising a r of confronting concave reflectors which can be either spherical or parabolic. The resonator dimensions are many times the wavelength of the energy sources to be combined. A plurality of mm wave energy sources are applied to the resonator in such a way that the great majority of the energy bounces back and forth between the reflectors near the axis thereof in the fundamental or Gaussian mode. The design minimizes multimoding and diffraction losses.

Abstract: The components of a transistor oscillator are mounted on an end cap rotatably mounted on the outer tube of a cavity resonator which stabilizes the oscillator. The intensity with which a high frequency is applied to the cavity resonator is adjustable by rotation of the end cap.

Abstract: A high frequency industrial generator, especially suitable for supplying power to a device for heating an electric poorly conducting substance such as a fleece of a cellulose material, comprises two hollow concentrically disposed conductors each of square section and supporting respective electrode plates of an associated capacitor. All the plates are vertically disposed and lie at right angles to the walls of the respective conductors. In the middle of the electric plates there is situated a triode electron tube electrically connected to the plates to form an oscillating circuit. The anode potential and cooling water supply for the electron tube is located within a field free space inside the internal conductor. One set of electrode plates can be adjusted relative to the other to adjust the frequency and the arrangement ensures only low electrical losses are incurred.

Abstract: A device for attenuating electromagnetic cavity interference waves, which occur in the vacuum system of a high-frequency electron tube, in particular a transmitting tube, comprising a wave-guide portion coupled to the cavity of the electron tube, which may or may not form a part of the vacuum system of the electron tube, and which wave-guide portion may have a length corresponding approximately to a quarter wave length of the interference waves, and is provided with a high-ohmic resistive coating, the high resistance of which is transformed by the wave-guide portion into a low resistance with respect to the cavity interference waves which are to be attenuated, in the cavity of the electron tube.

Abstract: A device comprising a band-pass filter comprising two concentrically arranged coaxial resonator cavities and a coupling capacitor disposed between these resonator cavities, wherein the bandwidth of the filter can be changed by means of a replaceable dielectric body disposed between the plates since the device is separable in two individually associated parts.

Abstract: The present invention relates to microwave circuits for operating on microwave radiations. It consists in combining a dielectric resonator and a microwave diode in a hybrid or integrated circuit, in order to provide a circuit which will operate without any external elements other than a direct current supply for the transmitter and a local microwave radiation for the receiver.

Abstract: A tuning circuit having a coaxial cavity with a movable toroidal section to effect inductive tuning. The outer conductor is tapered to effect capacitive tuning by movement of the toroidal section axially within the cavity due to varying of the width of the annular space between the outer conductor and the toroidal section.

Abstract: An output coaxial cavity for high power electron tubes is described in which the output coupler is directly connected to an intermediate coaxial conductor of the coaxial cavity at a distance from the tube that is greater than one-quarter wavelength and less than one-half wavelength over the tuning range of the cavity. The intermediate coaxial conductor is spaced between and concentric with an inner conductor and an outer conductor of the coaxial cavity. A first shorting stub is positioned between the inner conductor and the intermediate conductor and a second shorting stub is coupled between the intermediate conductor and the outer conductor. The positions of the shorting stubs are arranged to resonate the cavity at the desired tuning frequency.