Abstract: In order to suppress the amount of time needed for the start-up of a microwave tube carried out when voltage fed from a power source has decreased, while avoiding increase in scale of a power storage unit, this power supply device includes: a power supply unit that supplies power fed from the power source to the microwave tube that is provided with a cathode, a heater for heating the cathode, an anode, and a collector; a power storage unit that stores the fed power and, if the voltage of the fed power decreases, supplies stored power that is power obtained by the power storing, to the microwave tube; and a power supply switching unit that, if the voltage of the fed power decreases, stops supplying the stored power to the anode and does not stop supplying the stored power to the heater.

Abstract: A slow-wave circuit comprises: a waveguide comprising a meander-shaped part that transmits an electromagnetic wave and alternately repeats a first folded part and a second folded part folded onto the opposite side to the first folded part; and a beam hole that transmits an electron beam, extends in a predetermined direction, and penetrates the meander-shaped part, wherein the beam hole penetrates the meander-shaped part so that a part of the beam hole protrudes from the first folded part.

Abstract: A pillbox-type RF window having an input/output window in a microwave tube, the pillbox-type RF window includes a disc-shaped member having a metallization layer formed on an outer peripheral portion of a disc-shaped ceramic body; a pair of ring-shaped members constituted by metal bodies having substantially the same outer diameters as the disc-shaped member, arranged to sandwich the disc-shaped member from both sides, and integrated with the outer peripheral portion of the disc-shaped member; a tube-shaped member constituted by a metal body having an inner diameter substantially equal to the outer diameters of the pair of ring-shaped members and the disc-shaped member, for holding the pair of metal components and the disc-shaped member on an inside thereof; and a restriction member for suppressing rotation between the ring-shaped members and the tube-shaped member.

Abstract: A microwave tube includes an electron gun that emits an electron beam; a magnetic circuit that focuses the electron beam emitted from the electron gun; a collector that captures the electron beam that has passed through the magnetic circuit; a high frequency circuit that is spirally arranged around the electron beam focused by the magnetic circuit and that transmits a high frequency; and a magnetic body part arranged around the electron gun so as to be movable in an emission direction of the electron beam. A high frequency output from the high frequency circuit is controlled to be constant by moving the magnetic body part in an emission direction of the electron beam.

Abstract: In order to suppress the amount of time needed for the start-up of a microwave tube carried out when voltage fed from a power source has decreased, while avoiding increase in scale of a power storage unit, this power supply device includes: a power supply unit that supplies power fed from the power source to the microwave tube that is provided with a cathode, a heater for heating the cathode, an anode, and a collector; a power storage unit that stores the fed power and, if the voltage of the fed power decreases, supplies stored power that is power obtained by the power storing, to the microwave tube; and a power supply switching unit that, if the voltage of the fed power decreases, stops supplying the stored power to the anode and does not stop supplying the stored power to the heater.

Abstract: A pillbox-type RF window having an input/output window in a microwave tube, the pillbox-type RF window includes a disc-shaped member having a metallization layer formed on an outer peripheral portion of a disc-shaped ceramic body; a pair of ring-shaped members constituted by metal bodies having substantially the same outer diameters as the disc-shaped member, arranged to sandwich the disc-shaped member from both sides, and integrated with the outer peripheral portion of the disc-shaped member; a tube-shaped member constituted by a metal body having an inner diameter substantially equal to the outer diameters of the pair of ring-shaped members and the disc-shaped member, for holding the pair of metal components and the disc-shaped member on an inside thereof; and a restriction member for suppressing rotation between the ring-shaped members and the tube-shaped member.

Abstract: (A) An individual one of two or more terminals prepares a set of a first public key and a first private key. (B) One of the two or more terminals creates a set of a second public key and a second private key and distributes the second public key and the second private key to the other terminal(s). (C) One of the two or more terminals creates a shared key by using the corresponding first private key prepared in the (A) and the second public key shared in the (B). (D) A different terminal(s) of the two or more terminals creates a shared key used to communicate with the one terminal by using the second private key shared in the (B) and the first public key of the one terminal prepared in the (A). (E) The set of terminals performs an encryption communication(s) by using the shared keys.

Abstract: The objective of the invention is to provide a microwave tube, or the like, wherein gas adsorption action of a getter may be satisfactorily performed independently from a microwave amplification operation. In order to solve this problem, this microwave electron tube comprises: a helix wherein a microwave may progress oriented from an input section to an output section within a helical tube; an electron gun emitting an electron flow oriented toward the helix; a focusing device causing the electron flow to traverse the vicinity of the helix in the direction of a collector; the collector absorbing the electron flow; and a getter having a heater insulated from the cathode provided in the electron gun.

Abstract: An invention comprises: a circular waveguide that has a cylindrical section having a circular pipe conduit with a circular shaped cross section, and side wall sections joined to the both sides in an axial direction of the cylindrical section; a first rectangular waveguide that has a first rectangular pipe conduit with a rectangular shaped cross section and that is joined to one of the side wall sections so that the first rectangular pipe conduit communicates with the circular pipe conduit; a second rectangular waveguide that has a second rectangular pipe conduit with a rectangular shaped cross section and that is joined to the other of the side wall sections so that the second rectangular pipe conduit communicates with the circular pipe conduit; and a dielectric plate that is configured as a plate shape, is disposed in the circular pipe conduit, and is airtightly held to the cylindrical section, wherein the circular waveguide has a plastically deformable section that is plastically deformable so that at least

Abstract: (A) An individual one of two or more terminals prepares a set of a first public key and a first private key. (B) One of the two or more terminals creates a set of a second public key and a second private key and distributes the second public key and the second private key to the other terminal(s). (C) One of the two or more terminals creates a shared key by using the corresponding first private key prepared in the (A) and the second public key shared in the (B). (D) A different terminal(s) of the two or more terminals creates a shared key used to communicate with the one terminal by using the second private key shared in the (B) and the first public key of the one terminal prepared in the (A). (E) The set of terminals performs an encryption communication(s) by using the shared keys.

Abstract: To provide an electronic component housing apparatus that is able to efficiently cool the heat of a first and second electronic component, a first electronic component housing chamber 5000 houses the high voltage power supply module 100 (the first electronic component). A second electronic component housing chamber 6000 houses the TWT 200 (the second electronic component). At least some of a first partition plate 2500 and a second partition plate 2600 are provided so as to face each other. A first gap part G1 is provided between the first partition plate 2500 and the second partition plate 2600.

Abstract: An invention comprises: a circular waveguide that has a cylindrical section having a circular pipe conduit with a circular shaped cross section, and side wall sections joined to the both sides in an axial direction of the cylindrical section; a first rectangular waveguide that has a first rectangular pipe conduit with a rectangular shaped cross section and that is joined to one of the side wall sections so that the first rectangular pipe conduit communicates with the circular pipe conduit; a second rectangular waveguide that has a second rectangular pipe conduit with a rectangular shaped cross section and that is joined to the other of the side wall sections so that the second rectangular pipe conduit communicates with the circular pipe conduit; and a dielectric plate that is configured as a plate shape, is disposed in the circular pipe conduit, and is airtightly held to the cylindrical section, wherein the circular waveguide has a plastically deformable section that is plastically deformable so that at least

Abstract: Ringing of a signal after passing through a low pass filter in an LINC type linear amplifier is remedied. A linear amplifying device includes the linear amplifier including the low pass filter for removing high-frequency components; and an origin avoiding circuit which receives an original input signal and is provided upstream of the linear amplifier. If the original input signal is sampled in the vicinity of an origin, the origin avoiding circuit modifies a sampled value so at to replace the sampled value with a fixed value, and supplies the modified input signal to the linear amplifier.

Abstract: To suppress both influence of electron emission from a cathode side surface and consumption of energy to be supplied to a heater, while being provided with a grid, an electron gun of the present invention includes: a cathode capable of emitting electrons by heating; a grid capable of controlling the electron emission; and a cathode shield which is an conductor including a material portion located in the vicinity of a side surface of the cathode and facing at least a portion of the side surface via a gap or a heat insulating material, and not being made in direct physical coupling nor in direct physical contact with the cathode.

Abstract: Provided are a slow wave circuit and a traveling wave tube suitable for an increase in fineness with regard to processing beam holes, and suitable for higher frequencies. A slow wave circuit (10) includes a meandering waveguide (1) and a beam hole (2) that pierces the meandering waveguide (1), and the cross-section of the beam hole (2) in the direction orthogonal to the long direction is in the shape of a polygon having a larger number of sides than a quadrilateral.

Abstract: To provide an electronic component housing apparatus that is able to efficiently cool the heat of a first and second electronic component, a first electronic component housing chamber 5000 houses the high voltage power supply module 100 (the first electronic component). A second electronic component housing chamber 6000 houses the TWT 200 (the second electronic component). At least some of a first partition plate 2500 and a second partition plate 2600 are provided so as to face each other. A first gap part G1 is provided between the first partition plate 2500 and the second partition plate 2600.

Abstract: Provided are a traveling wave tube and a high-frequency circuit system such that the product life span of the traveling wave tube operating in multiple modes can be extended while variations in gain and amplification efficiency that accompany switching of the operation modes can be suppressed. The traveling wave tube comprises: an electron gun equipped with a cathode that releases electrons, and a heater that provides the cathode with heat energy for releasing the electrons; a helix causing an RF signal to interact with an electron beam formed from the electrons released by the electron gun; a collector for catching the electron beam emitted by the helix; an anode whereby the electrons released from the electron gun are guided into the helix; and a magnetic field application device for generating a magnetic field in order to change the diameter of the electron beam, said magnetic field application device being supplied with electric power for generating the magnetic field from the outside.

Abstract: A traveling wave tube system includes a traveling wave tube, and a power supply device for supplying required power supply voltages to the respective electrodes of the traveling wave tube. The power supply device includes a control voltage generation circuit for generating a control voltage which is a negative DC voltage on the basis of a ground potential and supplying the control voltage to the anode, an anode voltage generation circuit for generating an anode voltage which is a negative DC voltage on the basis of the potential of the anode and supplying the anode voltage to the cathode, and a collector voltage generation circuit for generating a collector voltage which is a positive DC voltage on the basis of the potential of the cathode and supplying the collector voltage to the collector.

Abstract: Provided is an adaptive equalization processing circuit with which an adaptive equalization process converges in a stable manner without reducing the transmission efficiency. This adaptive equalization processing circuit is characterized by being equipped with: a demodulation means that demodulates a received signal, and generates and outputs a training signal; an adaptive equalization processing means that uses a tap coefficient (generated using the received signal or the training signal) to perform an adaptive equalization process for removing waveform distortion in the received signal, and then outputs an equalization output signal; and a selection means that selects the training signal when the adaptive equalization processing means is in a non-convergent state, and inputs the training signal to the adaptive equalization processing means.

Abstract: An electron tube includes a shell that encloses a helix inside, and a plurality of support rods that support and fix the helix inside the shell, a part of each support rod that is in contact with an inner wall of the shell being covered with a conductive material, another part of each support rod that is in contact with the helix being covered with a dielectric material. The widths of conductive material of one end and another end of each support rod in a longitudinal direction are different, the side surface not being in contact with the shell nor the helix.