Abstract: A pressurizing method for pressurizing a second component arranged on a first component, against the first component by using a pressurizing apparatus having a stage on which the first component is mounted, a tool, and a protection sheet supplying section. The tool is disposed so as to face the stage and moved between a first position at which the tool faces the first and second components while spaced therefrom, and a second position at which the tool is biased toward the stage to pressurize the second component against the first component. When the tool is at the second position, the protection sheet supplying section supplies a protection sheet so that the protection sheet is placed between the second component and the tool.

Abstract: A pressurizing apparatus pressurizes a second component arranged on a first component against a first component. The pressurizing apparatus has a stage on which the first component is mounted, a tool, and a protection sheet supplying section. The tool is disposed so as to face the stage and moved between a first position at which the tool faces the first and second components with space and a second position at which the tool is biased toward the stage to pressurize the second component against the first component. When the tool is at the second position, the protection sheet supplying section supplies a protection sheet so that the protection sheet is placed between the second component and the tool.

Abstract: A linear-circular polarizer used for the transmission in the microwave band, which provides excellent impedance characteristics and stabilized cross polarization characteristics by having 1/4 wavelength phase plates and the inner surface of a circular waveguide made in one-piece for the purpose of cost and production step reduction. The linear-circular polarizer includes a pair of 1/4 wavelength phase plates of a specified width and height formed opposite to each other and symmetric with respect to the waveguides central axis. The 1/4 wavelength phase plates are formed on the inner surface of a circular waveguide at a closed end opposite to an end where a primary radiator is located.

Abstract: A circularly polarized wave-linearly polarized wave transducer using a waveguide characterized by expanding the inner wall of the section vertical to the tube axis of the waveguide in a taper form having a gradient in the axial direction of the tube. The taper gradient in the axial direction of the tube is different at plural parts in the circumferential direction of the inner wall, thereby producing a difference in the propagation constant of two modes orthogonal at a microwave frequency. The taper gradient and overall length of the waveguide are determined so that the phase difference of the two modes is .pi./4 at each end of the waveguide. The circularly polarized wave-linearly polarized wave transducer can be realized in a simple construction in which the core of a die in the die-casting process can be drawn out in only one direction.

Abstract: A mode transformer for a waveguide and microstrip lines capable of obtaining sufficient cross polarization isolation and a receiving converter comprising the same is provided. Transformers of horizontal and vertical polarized waves comprise orthogonal first and second microstrip lines and a circular waveguide. By placing a metal bar connected to the waveguide between the first and second microstrip lines, the metal bar has the ground potential which is the same as the potential of the circular input waveguide and the electric fields excited in the first and second microstrip lines have a polarity that move toward the direction of the metal bar, so that electric field coupling of the first and second microstrip lines may be avoided.

Abstract: A circular-linear polarizer includes a waveguide and a one quarter wave length plate which is installed on the inside wall of the waveguide. The surfaces of the waveguide and the one-quarter wave length plate forming the junction between them are flat. Alternatively, the one quarter wave length plate has a mounting surface for mounting on the inside wall of the waveguide. The mounting surface has a circular cross section which is complementary to the circular inside cross section of the waveguide. The junction provides improved electrical contact between the waveguide and the one-quarter wavelength plate. In addition, the cross polarization and axial ratio of the waveguide are improved while maintaining good impedance characteristics.

Abstract: On a terminal end plane of a circular waveguide, metal columnar blocks and a cross shaped branching transforming unit for branching two orthogonal linear polarized waves and transforming from circular TE.sub.11 mode to rectangular TE.sub.10 mode are disposed, and two rectangular waveguides are composed so as to form an angle of 45 degrees to the vertical axis and horizontal axis, that is, symmetrically to the axial center of the circular waveguide, in an electric field direction of the first linear polarized wave and an electric field direction of the second linear polarized wave. In this constitution, the orthogonal polarized wave branching filter of the microwave band for satellite communications can be reduced in size, and moreover the principal components can be formed integrally by an injection molding process.

Abstract: A linear-circular polarizer used for the transmission in the microwave band, which provides excellent impedance characteristics and stabilized cross polarization characteristics by having 1/4 wavelength phase plates and the inner surface of a circular waveguide made in one-piece for the purpose of cost and production step reduction. The linear-circular polarizer includes a pair of 1/4 wavelength phase plates of a specified width and height formed opposite to each other and symmetric with respect to the waveguides central axis. The 1/4 wavelength phase plates are formed on the inner surface of a circular waveguide at a closed end opposite to an end where a primary radiator is located.

Abstract: The feed-horn with helical antenna element of this invention comprises (1) a waveguide made of conductive cylinder having a step inside, the inner diameter in the vicinity of the opening face of the waveguide is larger than that of the base of the waveguide, and (2) a helical antenna element disposed at the base axial center of the waveguide. Introduction of the step-formed inside to the waveguide makes it possible to obtain excellent characteristics both of cross polarization and impedance.

Abstract: A multibeam antenna for simultaneously receiving waves from one or more communication satellites and a broadcast satellite, which are apart in their stationary orbit positions over the equator, is disclosed. The antenna employs an offset parabolic face, used as a reflector for receiving satellite broadcast waves, a converter having a primary radiator for receiving communication satellite Waves set at the focus point of the offset parabolic face, and a converter having a primary radiator for receiving broadcast satellite waves set near the envelope of the broadcast waves reflected from the offset parabolic face. The offset parabolic face is pointed in the direction of the communication satellite such that the plane of symmetry of the offset parabolic face is coincident with a plane specified by the communication satellite, the broadcast satellite, and the receiving point of the antenna.

Abstract: A waveguide-microstripline transformer comprises a waveguide which is closed at one end and has a slit at a side wall thereof, a dielectric substrate plate placed on the slit, a microstripline placed on the dielectric substrate plate, and a shield case covering the dielectric substrate plate, whereby less blocking of the incident electromagnetic wave is attained.

Abstract: By the extraction of the noise component from the FM demodulated output and the detection thereof, the output proportional to the noise power is obtained, and it is indicated as the CN ratio of the received signal. This quality indication of the received signal makes the antenna pointing angle adjustment easier than before, and also realizes the picture quality indication for a satellite broadcasting receiver.

Abstract: A shielded electric connector comprises contact pins each of which includes a contact portion on one end thereof for coming into contact with a mating contact piece, and a joint portion on the other end thereof for connecting an electric wire to be connected, an insulating housing in which the contact pins are disposed and held, a shield hood member which includes a front envelope that encloses the contact pins disposed and held in the insulating housing and a rear envelope that is formed so as to be continuous to and unitary with the front envelope, the hood member having open on only one side and formed with an electric wire lead-out portion, a shield lid member adapted to be coupled to the shield hood member in a manner to close the opening of the shield hood member, and a shield connection part adapted to be connected to a shield layer of the electric wires. A method of connecting electric wires to such shielded electric connector is also disclosed.

Abstract: A shielded electric connector comprises contact pins each of which includes a contact portion for coming into contact with a mating contact piece, on one end thereof and a joint portion for connecting an electric wire to be connected, on the other end side thereof, an insulating housing in which the contact pins are disposed and held, a shield hood member which includes a front envelope that encloses the contact pins disposed and held in the insulating housing and a rear envelope that is so formed as to be continuous to and unitary with the front envelope, that is open on only one side and that is formed with an electric wire lead-out portion, a shield lid member adapted to be coupled to the shield hood member in a manner to close the opening of the shield hood member, and a shield connection part adapted to be connected to a shield layer of the electric wires. A method of connecting electric wires to such shielded electric connector is also disclosed.

Abstract: A coupling engagement mechanism for an electric connector comprises engagement fixtures and an insulating housing element which includes engagement fixture receiving portions for accommodating the engagement fixtures. Each of the engagement fixtures is unitarily formed of a springy metal plate. An engagement portion which engages an abutting portion of a mating connector is formed at one end of a body of each engagement fixture. A manipulation portion is formed at the other end of the body. Elastic pieces whose upper ends are continuous to the body and which extend downwards are formed on both right and left sides of the body. Each of the elastic pieces is formed with, at least, a first coming-off-preventive bend and a second coming-off-preventive bend at a predetermined interval in a direction of the extension. Each engagement fixture receiving portion of the insulating housing element is formed with a first protuberance and a second protuberance at an interval in the extending direction.

Abstract: A shielded electrical connector comprises a plurality of contacts each having a connecting end to be connected to a mating connector and a termination end to which a cable is to be connected; an insulating housing for holding the contacts between their connecting and termination ends; an enclosing shell for the connecting ends of the contacts; and a metal hood for enclosing the insulating housing and adapted to be electrically connected to the shield member of the cable, the metal hood having a receiving part for receiving the insulating housing, a sleeve member to be crimped to the shield member, and a hood section between them for enclosing the termination ends of the contacts, the enclosing shell and the metal hood being adapted to be joined together.

Abstract: In a waveguide-to-microstrip line coupling arrangement, a microstrip line is placed on an outer surface of a wall of a waveguide which is coupled with the microstrip line via a metallic post connected at its one end to a center strip conductor of the microstrip line and is inserted inside the waveguide via through-holes made in a ground plane of the microstrip line and in the wall of the waveguide where the diameter of the through-hole made in the ground plane is made smaller than that of the through-hole made in the wall of the waveguide. The waveguide has a short-circuited end and the metallic post is placed close to the short-circuited end. The coupling arrangement may be used in a microwave frequency converter having an microwave integrated circuit including a local oscillator and a mixer, where the MIC is located on an outer surface of a longitudinal wall extending from a short-circuited end to an open end.

Abstract: A frequency converter is constituted by an unobstructed circular waveguide unit through one end of which received signals are fed thereto and conveying signals in the TE11 mode, a rectangular waveguide unit having a rectangular waveguide microstrip line converter unit in its output end and conveying signals in the TE10 mode, a circular-rectangular waveguide converter unit connecting the output end of the circular waveguide unit and the rectangular waveguide unit to convert the mode of transmission of signals from the TE11 mode in the circular waveguide unit to a principal transmission mode TE10 in the rectangular waveguide unit, and a microwave integrated circuit extending in the direction of and being on the H-wall side of the circular-rectangular waveguide converter unit and the rectangular waveguide unit and connected to the rectangular waveguide-microstrip line converter unit for processing the received signals and delivering the received signals as signals of an intermediate frequency.

Abstract: A frequency stabilized oscillator includes a rectangular resonant cavity having a ground or short circuit wall, an H wall, and a top wall having an inductive window therein. A solid-state oscillating device such as a GUNN diode is attached at one end thereof to the short circuit wall, and a disk type dielectric resonator is supported from the short circuit wall and is located substantially adjacent the solid-state oscillating device so as to electromagnetically couple with the oscillating device. The inductive window is located so as to be in substantially overlying relationship with the dielectric resonator. A strip conductor is attached to the upper end of the oscillating device and extends through the H wall to the exterior of the oscillator to thereby provide a DC supply terminal for the oscillating device. The H wall of the resonant cavity is isolated from the DC supply applied to the strip conductor by means of a thin insulating layer between the strip conductor and the H wall.

Abstract: A microwave solid state oscillator of a compact size for generating an oscillation of a highly stabilized frequency, comprising a cavity resonator having a coupling window for coupling with an external circuit, a solid state oscillation device and a dielectric resonator of a large dielectric constant and a high Q factor, characterized in that the solid state oscillation device is installed in a recess which is formed on an inner side wall of the cavity resonator and having an opening sufficiently small compared with an internal size of the cavity resonator, and the dielectric resonator is disposed in the cavity resonator in a manner to face to and to be adjacent to the opening of the recess.