Abstract:
A periodic permanent magnet (PPM) klystron has beam transport structures and RF cavity structures, each of which has permanent magnets placed substantially equidistant from a beam tunnel formed about the central axis, and which are also outside the extent of a cooling chamber. The RF cavity sections also have permanent magnets which are placed substantially equidistant from the beam tunnel, but which include an RF cavity coupling to the beam tunnel for enhancement of RF carried by an electron beam in the beam tunnel.
Abstract:
A Klystron transmitter for use in weather radar systems has a transmitter module for operating with any of various Klystron tubes designed for different frequency ranges, such as a low S-Band range, a high S-Band range, and a C-Band range. Each of the Klystron tubes is designed to have similar operating characteristics, such as output power and operating voltages. In addition, the transmitter module has driver circuitry for driving the Klystron tube of the transmitter, and such driver circuitry is operable over a wide frequency range so that the same driver circuitry can be used for any of the contemplated bands. Accordingly, the same core transmitter circuitry can be used for any of the Klystron tubes allowing a manufacturer to control which of the contemplated bands is implemented by selecting the appropriate Klystron tube and stable local oscillator (STALO) for the desired band. By using the same core design of the transmitter circuitry for all of the Klystron tubes, the overall manufacturing and implementation costs of Klystron transmitters can be significantly reduced.
Abstract:
A high-power microwave RF window is provided that includes a cylindrical waveguide, where the cylindrical waveguide includes a ceramic disk concentrically housed in a central region of the cylindrical waveguide, a first rectangular waveguide, where the first rectangular waveguide is connected by a first elliptical joint to a proximal end of the cylindrical waveguide, and a second rectangular waveguide, where the second rectangular waveguide is connected by a second elliptical joint to a distal end of the cylindrical waveguide.
Abstract:
A low-voltage, multi-beam, multi-MW RF source that operates at a voltage less than or equal to approximately 60 kV and generates at least one MW. The RF source includes a cathode configured to generate a plurality of beamlets. An input cavity and output cavity are common to the plurality of beamlets. A plurality of gain cavities are provided between the input and output cavities, each having a plurality of openings corresponding to the plurality of beamlets. The power source may further include a plurality of cathodes, each cathode generating a plurality of beamlets, wherein the input and output cavities are common to the plurality of beamlets from each of the plurality of cathodes, and a separate set of gain cavities are provided for each cathode. A single cathode version generates approximately 2.5 MW, and a four cathode version having four independent cavity systems and a common magnetic system generates approximately 10 MW.