Abstract: A waveguide structure is fabricated by patterning active elements on a semiconductor wafer (21). The upper surface of the wafer (21) and the active elements are then coated by a dissolvable positive resist polymer. The polymer is etched using conventional techniques to produce a former for the structure of die waveguide channel and subsequently the polymer former is coated (26) and electroformed (27) using a suitable metallic material. Finally, the polymer former is dissolved leaving an open channel (25) the boundaries of which are defined by the electroformed stucture. The waveguide structure has the advantage that die active elements are integral with the waveguide structure and lie in a common fabrication plane which means that if the depth of the waveguide varies the active elements remain in the same plane. The waveguide structure is particularly suited for use at terahertz frequencies.

Abstract: A device with a nonradiative dielectric waveguide which operates in a microwave band or in a millimeter wave band. The device with a nonradiative dielectric waveguide is, for example, an oscillator, a circulator, a coupler or the like. The device has a pair of parallel conductors, a dielectric strip which is disposed between the conductors and propagates a high-frequency electromagnetic wave in a specified mode, a mounting surface which is formed on one of the conductors, and an end surface which is defined by an end of each of the conductors so as to be vertical to a traveling direction of the electromagnetic wave propagated in the dielectric strip. An end of the dielectric strip is exposed at a corresponding end surface of the device.

Abstract: This level measuring instrument which operates with microwaves, has a radiation characteristic with a pronounced forward lobe and can be used to transmit and/or receive microwaves with a large frequency bandwidth. A housing section is designed as a waveguide short-circuited at one side and one end by a rear wall, and is virtually completely filled with an insert made of a dielectric. An exciter element, projects into the housing section and is connected to a microwave source. An antenna adjoins the housing section, for transmitting and/or receiving microwaves. A gap is arranged in the insert between the exciter element and the antenna. The gap forms a filter which is essentially non-transparent to higher modes of the waveguide.

Abstract: A waveguide system that includes a plurality of waveguide sections, each taking the form of an elongated longitudinally extending tubular member having a substantially circular shaped wall in cross section which coaxially surrounds a longitudinal axis. The wall has a longitudinally extending trough portion extending radially inward toward the longitudinal axis. The trough portion is defined by a pair of circumferentially spaced wall portions extending inwardly and joined together by a connecting wall portion. The wall portions together define a ridge having an inner surface on the interior side of the wall and an outer surface on the exterior side of the wall. Each waveguide section has opposing ends with each end having a longitudinally extending peripheral lip at the ridge. The wall has at each said end an annular mounting flange extending essentially radially outward from the exterior side of the wall.

Abstract: A normal NRD guide is constituted in the part to be coupled with a dielectric resonator, a hyper NRD guide for simply transmitting the LSM01 mode is constituted in a multipoints circulator part, the normal NRD guide is constituted in a coupler part, the hyper NRD guide is constituted in the mixer part, and the normal NRD guides are constituted in a dielectric line switch part and in a connection unit between components.

Abstract: A waveguide interconnection system. First and second waveguide sections each have an exterior end and an interior end. A first flange, formed in a cylindrical configuration, has an inboard surface in a planar configuration positionable adjacent to the first waveguide section adjacent to the interior end thereof. The first flange has an outboard surface, a peripheral exterior surface with male threads formed thereon, and an opening therethrough essentially coextensive as an extension of the cross-section of the waveguide. A second flange, formed in a cylindrical configuration, is positionable adjacent to the second waveguide section adjacent to the inboard end thereof. The second flange has an outboard surface and an inboard surface in a generally planar configuration with a peripheral surface therebetween and an opening centrally therethrough essentially coextensive as an extension of the cross-section of the second waveguide.

Abstract: A method and apparatus for efficiently interconnecting a large number of high frequency high bandwidth signals includes two interface plates (100, 200), each having two substantially coplanar faces, a mating face (110, 210) and a non-mating face (120, 220). Each interface plate has waveguides (116, 216) disposed between the coplanar faces such that when the mating faces of the interface plates are brought together, a plurality of waveguide connections are made. An energy absorbing gasket (300) having a hole pattern matching the waveguide pattern is disposed between the mating faces of the interface plates so that reflections caused by misalignment and non-coplanarity of faces can be reduced.

Abstract: A method of tuning a summing network of a base station and a band-pass filter provided in such base station. Tuning is performed by arranging a moveable part made of a low-loss dielectric material or ferrimagnetic material in a space between an inner conductor and a tubular conductor in a coaxial cable, the width of the cross-section of the moveable part being different from its length, and tuning the summing network by adjusting the phase angle reflecting from the connector by turning the moveable part about an axle which intersects the cross-section substantially perpendicularly, whereby the distance between the moveable part and the inner conductor and/or between the moveable part and the outer conductor changes.

Abstract: A waveguide for microwave radar level gages that includes a process sealed barrier in the waveguide that is impedance matched with bore transition sections of the waveguide at opposite ends thereof. The impedance matching results in positioning of the tapered end of the barrier offset from the ends of the bore transition sections.

Abstract: A dielectric-line component (such as an oscillator or circulator) has a dielectric strip between a pair of electrically conductive flat-plates. The component is to be combined with another dielectric-line component which also has dielectric strips between a pair of conductive plates. When these components are assembled, a pair of conductive plates of the respective two components opposedly face each other at a first position, while the other pair of conductive plates of the respective two components opposedly face each other at a second position. The first and second positions are displaced from each other in the vertical direction and in the length direction in relation to the conductive plates. Further, the opposing faces of the dielectric strips of the two components are positioned in an area defined by the first and second positions, either between the first and second positions or at one of the first and second positions, for example.

Abstract: A coupling is presented for coupling two electromagnetic hollow conductors (waveguides) with different cross-sectional shapes. The coupling includes steps (S1-S3) arranged sequentially in the axial direction, having an essentially rectangular cross section and rounded corners as well as different clearances. The dimensions of all steps (S1-S3) are purposely designed so that other modes in addition to the basic mode are able to propagate therein. Because of the dimensions of coupling (3), only modes intended to conduct signals propagate in the joined waveguides, while those which are not intended to conduct signals are essentially cancelled by superposition.

Abstract: A process sealed waveguide is formed in a flange mounted on a tank, and is used for transmitting microwave energy from a source of microwave energy to an aperture of an antenna on the interior of the tank. The process sealed waveguide includes a mechanical barrier to prevent escape of fluid under pressure or liquid from the interior of the tank, and also serves to reduce impedance mismatch between the air, vapor, or liquid filled waveguide or antenna apertures. The flange is mated to the microwave source through an electronic housing to flange adapter that interfaces with the flange in a manner to provide a vent in case the mechanical barrier fails so pressure is released, and to provide flame quenching if flames are present. The adapter includes a second waveguide having a process sealed mechanical barrier mounted coaxially with the mechanical barrier in the waveguide in the flange.

Abstract: A nonradiative dielectric line is provided which solves problems concerning the relative positioning of the parts, mass production, and variations in electrical characteristics of a dielectric strip, and which makes integral molding using injection molding technology possible. A height of a dielectric in the propagation area is made higher than the height in the non-propagation area, and a dielectric layer having a low dielectric constant is provided in the non-propagation area. Thus, the thickness of the dielectric layer in the non-propagation area can be increased.

Abstract: A microwave level gauge has a flange adaptor which includes a first end for coupling to a process connecting flange and a second end for coupling to an electronics housing. The adaptor has a section of reduced cross-sectional area along its length between the first and second ends, which defines a thermal transfer restriction that restricts heat transfer from the first end to the second end. A waveguide extends through the adaptor, from the first end to the second end.

Abstract: A device with a nonradiative dielectric waveguide which operates in a microwave band or in a millimeter wave band. The device with a nonradiative dielectric waveguide is, for example, an oscillator, a circulator, a coupler or the like. The device has a couple of parallel conductors, a dielectric strip which is disposed between the conductors and propagates a high-frequency electromagnetic wave in a specified mode, a mounting surface which is formed on one of the conductors, and an end surface which is formed at an end of the conductors so as to be vertical to a traveling direction of the electromagnetic wave propagated in the dielectric strip. An end of the dielectric strip is exposed at a corresponding end surface of the device.

Abstract: A waveguide seal assembly for a waveguide joint is fabricated in separate parts, including a relatively small inner conductive part for surrounding the coupled waveguide openings in the joined waveguide flanges of two joined waveguide sections, an outer conductive part having a central opening which permits the outer part to fit over the inner part such that an intermediate gap is formed between the inner and outer parts, and a gas sealing element, suitably in the form of an O-ring, fitted into this intermediatex gap. Preferably, an O-ring groove is provided on the outer perimeter of the inner conductive part for retaining the O-ring when the seal assembly is installed. Also, preferably the inner conductive part is slightly thicker than the outer part to ensure good electrical contact at the coupled waveguide openings.

Abstract: A high-frequency integrated circuit which operates in a microwave band or in a millimeter wave band. The high-frequency integrated circuit has a plurality of devices with respective nonradiative dielectric waveguides such as an oscillator, a coupler, etc., and a substrate on which these devices are surface-mounted. Each of the devices has a pair of parallel conductors, a dielectric strip which is disposed between the conductors and propagates a high-frequency electromagnetic wave, a mounting surface which is formed on one of the conductors and is in contact with the substrate, and an end surface which is defined by an end of the conductors so as to be vertical to a traveling direction of the electromagnetic wave propagated in the dielectric strip and at which an end of the dielectric strip is exposed. The devices with a nonradiative dielectric waveguide are evaluated separately, and thereafter, the devices are surface-mounted on the substrate close to or in contact with one another.

Abstract: An antenna includes a parabolic reflector and a supply line attached thereto. The supply line includes two rectangular electromagnetic (waveguides) that are essentially parallel to each other. A tube-shaped exciter is common to the (waveguides) and is located at open ends of the waveguides. A back side of the reflector has a mechanically stable receptacle, which is used to attach the reflector to a support. The receptacle includes a metal ring with an L-shaped cross section in an opening that corresponds to a central opening in the reflector. The ring has a cylindrical area and, at a right angle to the cylindrical area, a base area that extends toward the inside of the ring. In the installed position, the cylindrical area of the ring penetrates and is centered in the opening of the reflector. A holding plate, which firmly surrounds and supports both waveguides, fits precisely into the ring and is attached to the ring in removable form when mounted.

Abstract: A first circular waveguide or an elliptical waveguide has an inner circumferential surface tapered such that its inside dimension is gradually reduced continuously toward an end thereof. The elliptical waveguide comprises an antenna waveguide connected to an antenna device. Another circular waveguide has an end joined to the end of the first circular waveguide or the elliptical waveguide. Both waveguides have different inside dimensions at the joined ends. A hermetic seal is sandwiched between the joined ends of both the waveguides. The tapered inner circumferential surface is effective to cancel out a susceptance produced by the hermetic seal. The first waveguide with the tapered inner circumferential surface can easily be manufactured by die casting.

Abstract: An NRD guide circuit is assembled by arranging, on a lower conductive plate, a positioning member of a material (e.g., foaming styrol resin, foaming urethane or the like) having a dielectric constant smaller than that of a dielectric strip, followed by placing such component parts of the NRD guide circuit as a dielectric strip at a position delimited by the positioning member, whereafter an upper conductive plate is secured thereto.

Abstract: The invention relates to a resonator shell construction, comprising at least two metallic shell modules (41-44) connected to each other to form a modular shell construction, each module enclosing at least one resonator cavity (42-52). The modules comprise wall portions (41a-41c, 42a-42c, 43a-43c, 44a-44c) projecting from the modules, said wall portions being connected to one or more modules, whereby one or more new resonator cavities (61-68) are formed between the modules.

Abstract: A waveguide seal (16) which provides reliable mechanical contact and which reduces the electrical breakdown in the area of a waveguide joint (10). The seal (16) includes a dovetailed groove (40) into which is inserted a helical coil (30). During assembly, flanges (18) of the interconnected waveguides (12, 14) are then compressed against the helical coils (30) on each side of the seal (16). The helical coil (30) is then partially compressed and provides reliable mechanical connection between the waveguides (12, 14) and the interposed seal (16). Further, a gap (58) in predefined areas between the seal (16) and the waveguide flanges (18) provides for significantly reduced electrical breakdown in the joint area, thereby providing a better electrical connection.

Abstract: A high-frequency integrated circuit which operates in a microwave band or in a millimeter wave band. The high-frequency integrated circuit has devices with a nonradiative dielectric waveguide such as an oscillator, a circulator, etc., and a mount case with a nonradiative dielectric waveguide in which these devices are mounted. Each of the devices with a nonradiative dielectric waveguide has a couple of conductors, a dielectric strip which is disposed between the conductors and propagates a high-frequency electromagnetic wave in a specified mode, a mounting surface which is formed on one of the conductors, and an end surface which is formed on an end of the conductors so as to be vertical to a traveling direction of the electromagnetic wave propagated in the dielectric strip and on which an end of the dielectric strip is exposed. The devices with a nonradiative dielectric waveguide are evaluated separately, and thereafter, the devices are mounted in the mount case individually.

Abstract: An antenna device for receiving a radio wave transmitted from a communication satellite, converting the received radio wave into an electric signal, amplifying the signal, and outputting the amplified signal to a receiver is capable of quickly resuming a radio wave reception in the event of a failure. The antenna device includes a converter assembly having a straight waveguide and a twisted waveguide for supplying polarized radiowaves in the same direction to two LNBs, which are oriented in the same direction and fixed to a fixing adapter that is slidably mounted on a holder unit. Even when one of the LNBs suffers a failure, the other normal LNB can be used as a spare LNB and simply moved to replace the malfunctioning LNB. Therefore, any malfunctioning LNB can be replaced easily for quick resumption of a radio wave reception. A satellite communication reception system employs such an antenna device.

Abstract: A measuring jig which is used to measure characteristics of a device with a nonradiative dielectric waveguide which operates in a microwave band or in a millimeter wave band. The measuring jig has a mount section on which a device with a nonradiative dielectric waveguide is to be mounted, and a converting section which connects the device to an external circuit. The converting section has a couple of parallel conductors, a dielectric strip which is disposed between the conductors and propagates a high-frequency electromagnetic wave in a specified mode, and an end surface which is formed on an end of the conductors so as to be vertical to a traveling direction of the electromagnetic wave propagated in the dielectric strip and on which an end of the dielectric strip is exposed.

Abstract: A unitary waveguide element is employed in a light weight waveguide antenna. The waveguide element has a waveguide portion having a front wall with slots formed across it at predetermined locations, a continuous back wall, and substantially continuous broad walls. A first flange is formed on one of the broad walls lying in a plane that extends in the width direction. A pair of flanges are formed on the other broad wall that lie in planes that are displaced slightly from the first flange, so that when the waveguide element is superposed onto the next successive element, these flanges overlap with the second flanges straddling the first flange. The flanges are then bonded with epoxy or an equivalent agent. A rivet box is formed on the proximal side of the back wall and permits attachment of the waveguide element in precise alignment to a predrilled backing plate with rivets or other suitable fasteners. The rivets do not penetrate into the waveguide portion of the element.

Abstract: A microwave guide interface extends between a rear surface of a microwave antenna reflector and a facing surface of a base plate. An interconnect member having a ball surface extends rearwardly from the rear of the reflector. A second interconnect member having a ball-receiving socket extends forwardly from a facing surface of the base plate. A spring clamp is attached to a periphery of the base plate and includes a yoke coacting with a strike hook on a circular rib or on separate lugs extending from the rear of the reflector for cinching up the socket into abutting contact with the mating ball surface. A peripheral O-ring extends between peripheral surfaces of the members allows tilting of the assembly such that assembly and alignment can be made over a fairly wide range of angular tolerances of the base plate and reflector.

Abstract: A microwave waveguide is presented which includes a gas tight seal which provides pressure isolation between two portions of the waveguide. In accordance with an important feature of this invention, an upper flange includes a threaded axial opening for receiving and retaining a threadably mated dielectric filling material. If the thread pitch is small relative to the signal wavelength, the threaded section has essentially the same electrical characteristics as a smooth waveguide. The resulting structure provides an economical and practical method of retaining a solid dielectric filling material in a waveguide against high pressure without changing the effective diameter of the waveguide. In accordance with another feature of this invention, a novel high pressure seal is provided between the upper and lower flanges in the area surrounding the threaded axial opening.

Abstract: An integrated circuit microwave interconnect is formed upon a surface by disposing a dielectric layer over the surface and patterning the dielectric layer to form a dielectric region. The dielectric region is then surrounded by a surrounding metal layer. In one embodiment the surface may be a non-metal upon which a metal layer is disposed prior to disposing the dielectric layer. In this embodiment an additional metal layer is disposed adjoining the first metal surface on both sides of the dielectric region after patterning the layer to form the dielectric region. Thus, the two metal layers thereby form the surrounding metal layer around the dielectric region. The microwave interconnect may be formed upon the surface of the substrate, above the surface of the substrate in a floating configuration, or in a trench within the substrate.

Abstract: A right angle waveguide junction for a microwave multiplexer is provided including a step in one of the waveguides for improved electrical response. A rectangular waveguide manifold (10) is coupled to a filter (12) which includes a coupling iris (14) and a circular cavity resonator (16). The circular cavity resonator is a circular waveguide with two ends closed by a metal wall. The structure of the waveguide multiplexer includes a step change (18) in the rectangular waveguide (10) height which controls the electrical response properties of the junction.

Abstract: A fixture for determining RF characteristics of a dielectric medium comprises a first coupler having an RF through-window with input and output ports, the input port connectable to a waveguide input. A second coupler has an RF through-window with input and output ports, the output port connectable to an output waveguide. A plurality of rods are aligned with the axes of the input and output waveguides and connect the output port of the first coupler to the input port of the second coupler. Each rod is passable through the dielectric media and mates with the input port so as to form a continuous waveguide passing through the dielectric media.

Abstract: A method and apparatus for adjusting the impedance of an electromagnetic energy-actuated device. An auxiliary test flange includes a substantially planar metallic member. An internal aperture matches the dimensions of the waveguide cavity formed at the mating ports of adjacent electromagnetic energy-actuated devices. The member includes an access groove for a metallic stub, permitting the stub to be inserted from an edge of the member into the aperture. Measurements of energy transfer are made as the stub is inserted to thereby adjust either the capacitive or inductive impedance to energy transfer. After a predetermined degree of energy transfer is observed, one or the other of the devices may be modified by the addition of a permanent auxiliary flange or directly modified in accordance with the optimized aperture reduction.

Abstract: A dielectric/conductive waveguide (20) includes a dielectric housing (22) having a longitudinal axis (14) and a central channel (29). A conductive layer (24,25) is affixed to the inner surface (21 ) and/or the outer surface (23) of the housing (22) to confine electromagnetic radiation (17) within the waveguide (20). Ribs (50,64) protruding into the channel (29) may be used to further confine the radiation (17). Sections of waveguide (20) may be combined using connectors (30). A local area network (90) can be formed using a plurality of sections of waveguide (20), computers (94), and bi-directional couplers (92). Air gaps (98) may break up the waveguide (20) at various places.

Abstract: Obtains a large increase in the number of fiber optic inputs/output (I/O) lines connectable to a module by enabling edge connection of multiple clusters of optical fibers to be connected around a module. Each connector connects a cluster of optical fibers in a small dimension of space on the module. Many distinct pluggable connectors may be provided along one or more edges of a module. The optical-fiber cluster connectors are embedded in indentations around the edges of a multilayer glass/ceramic (MLGC) multi-chip module (MCM), which may be a thermal conduction module (TCM), containing an integrated photonic receiver and/or transmitter for each fiber. Each connector supports a large number of fibers from a single cable, and a large number of connectors may be provided in a single module. Easy plugging and unplugging is obtained for each connector without interferring with any existing cooling apparatus or I/O pins of the module.

Abstract: A converter for converting circularly polarized waves in a round waveguide into linearly polarized waves in a rectangular waveguide has two probes and a transmission line pattern all of which are formed of metal foil on a thin dielectric film board. The board is flexible and extends across the open ends of the two waveguides. The first probe has a square shape and the transmission line has two conductor arms connected to adjacent sides of the square. The other ends of the conductor arms are connected to the second probe with an impedance matching resistor formed on the film board between the two arms. One conductor arm is one-quarter wavelength longer than the other to convert from circularly polarized waveguide transmission to microstrip transmission.

Abstract: The disclosed waveguide branch separating filter can be modularly constructed of a basic frequency separating filter and of a filter expansion unit. Both the basic frequency separating filter as well as the filter expansion unit are composed of a reactively terminated (including short circuit) feeder waveguide to which the separating filters are coupled. The expansion of the basic frequency separating filter occurs in largely disturbance-free fashion during operation in that the reactive termination (including short circuit) thereof is mechanically replaced by the filter expansion unit and is electrically simulated during the refitting by a short-circuit plate or by short-circuit pins.

Abstract: A testing apparatus for a high-frequency integrated circuit chip for transporting the high-frequency input/output signals of this circuit by means of high-frequency lines of adapted characteristics impedance to measuring apparatus, is characterized in that it comprises:a first subassembly constituted by an insulating or dielectric substrate carrying on the one hand the integrated circuit chip fixed on one of its surfaces and on the other hand a network of high-frequency lines of the coplanar type formed on the same surface (designated as front surface) and arranged according to a geometric configuration suitable to transport the signals emitted by the inputs/outputs of the integrated circuit to the peripheral regions of the substrate, and a second subassembly for receiving the substrate provided with the integrated circuit and with the co-planar network with, this second subassembly further having means for producing a pressure on the mass regions of the coplanar network on a mass surface of this second subas

Abstract: An improved waveguide flange is disclosed for high power operation that helps prevent arcs from being initiated at the junctions between waveguide sections. The flanges at the end of the waveguide sections have counterbores surrounding the waveguide tubes. When the sections are bolted together the counterbores form a groove that holds a fully annealed copper gasket. Each counterbore has a beveled step that is specially configured to insure the gasket forms a metal-to-metal vacuum seal without gaps or sharp edges. The resultant inner surface of the waveguide is smooth across the junctions between waveguide sections, and arcing is prevented.

Abstract: A remote waveguide flange clamp system (10, 11) detachably connects a first waveguide section (20) to a second waveguide section (30, 37). System (10, 11) is controlled remotely by a controller (60). A pair of elongated clamping levers (40) is mounted pivotally to pins (42) on bracket arms (39) of section (30, 37). Levers (40) rotate about pins (42) when a motor assembly (51) moves driving ends (47) of levers (40) outwardly or inwardly relative to section (30, 37). When ends (47) move outwardly, clamping ends (44) of levers (40) apply a compressive force to flanges (22, 32) of sections (20, 30) to provide a gasketed seal (80) inhibiting RF leakage therebetween. Assembly (51) includes a torque sensor (66) for continuously applying current to a motor (50) in assembly (51) until sensor (66) measures current substantially equaling a predefined value.

Abstract: A precision transmission line in the form of a short air line is disclosed. The short air line is approximately one-quarter wavelength at the middle frequency of the measurement frequency range. One embodiment comprises a very short coaxial air line. The inner conductor is threaded onto a mating inner conductor, such as the inner conductor of the network analyzer test port. For reliable interface at the other end of the inner conductor, a precision coaxial connector is preferably provided for connection to a device under test. The outer conductor is then attached coaxially to the inner conductor between the network analyzer test port and the device under test. Another embodiment comprises a waveguide for calibrations at higher measurement frequencies. In the case of the waveguide, locating structure is provided for properly orienting the waveguide with respect to the network analyzer test port and the device under test.

Abstract: A one-piece gasket is used between millimeter waveguide sections to prevent energy leakage from the joint. The gasket consists of an electrically conductive elastomeric ring filled with metallic particles, a conformable metallic inner shield on the inner periphery of the ring, and a conformable metallic outer shield on the outer periphery of the ring. The gasket is conveniently prepared by casting the filled elastomer in place between the shields.

Abstract: The present invention relates to a transition wherein a microstrip line, formed on one major surface of a substrate, is capacitively coupled to a reduced-height waveguide, comprising a predetermined width-to-height ratio, by means of a T-bar conductive pattern formed on a substrate at the end of the microstrip line. Such T-bar transitions can also be connected on opposite end of the microstrip line to provide connections between two waveguide sections.

Abstract: A connecting element for waveguides includes two waveguide sections which are contacted with each other via a bent choke of two sections and mechanically connected so as to allow a longitudinal displacement, tilting and rotation relative to each other. One waveguide section is provided at its circumference with an axial annular groove extending radially outside the axial section of the choke and the second waveguide section is provided with a circumferential collar projecting at least in an axial direction and engaging in the annular groove.

Abstract: A flange connection for round waveguides achieves a high-accuracy coaxiality of two round mutually adjoining waveguides (1a, 1b) by means of a radially elastic centering ring (3). The flange connection comprises two independent flange rings (2a, 2b) which are in each case attached to one end of the waveguides (1a, 1b), in which arrangement they are attached so as to be undisplaceable in the axial direction for a construction of the flange connection but to be freely rotatable around the respective waveguide. According to a preferred embodiment of the invention, the flange rings (2a, 2b) are constructed in such a manner that the flange connection can be joined in the manner of a bayonet lock.

Abstract: A waveguide twist includes at least three waveguide sections which are connected to each other and rotatable about their longitudinal axis usually by a same angle. Each waveguide section with the exception of the first waveguide section and the last waveguide section supports externally a lever which has two axial ends engaging in grooves of adjoining waveguide sections so as to be longitudinally displaceable to allow distribution of the total angle of rotation over the waveguide sections.

Abstract: The present invention relates to a clamping device for joining two waveguides used for propagating microwaves. The waveguides are of the type comprising hollow microwave propagation channels having at their meeting ends connection flanges in abutting relationship, the flanges being provided with aligned openings. The clamping device comprises a top wall and a pair of generally parallel side walls depending from the top wall. A metallic pin is mounted to one of the side walls and projects toward the other side wall which is provided with a cut-out portion facing the pin. In use, the pin is inserted through a pair of aligned openings in the flanges and the clamping device is pressed toward the flanges to turn about the axis of the pin until the flanges are deeply received between the side walls.

Abstract: An arrangement is provided for attaching a flange (4) to a wave guide (1) and comprises a flange (4), a further flange (2) and a locking member (3) in the form of a frame or ring for respectively a rectangular or circular wave guide. The locking member (3) is placed between the flanges (2,4). The flange (4) has a wall (46) of a recess (45) such that when both flanges are fastened to the wave guide (1) and to each other, the locking member (3) penetrates a distance into the wave guide wall, thereby locking the flanges (2,4) to the wall.

Abstract: Pairs of flanges for connecting identical tubular sections in series. The flanges are complementary in form, one being welded to the end of the preceding section, the other welded to the adjacent end of the following section. The flanges include interengaging means for compelling alignment when brought together, limited areas in axial engagement which under the pressure available will enhance electrical continuity, sealing means for preventing passage of gas through the joint and means for holding the flanges together under high pressure.

Abstract: A transformation device for connecting waveguides of different cross section includes a waveguide element which is provided with at least two successive transforming sections and has a rotationally symmetrical recess extending in axial direction over all transforming sections. Inserted in the recess along a respective portion thereof are a plurality of insulating rigs so that one of said transforming sections adjoining the connection plane with one of the waveguides is defined by said recess while subsequent transforming sections are defined by the insulating rings of corresponding varying inner diameter.

Abstract: A rotatable polarized signal receiver in a system for receiving linearly polarized electromagnetic signals includes a signal conductor having a receiver probe portion, oriented in a circular waveguide parallel to the polarization of the incident signal, and signal launch probe portion extending into the rectangular waveguide orthogonal to the direction of signal transmission therein, mounted concentrically in an insulator rod through perpendicular coupling of the circular and rectangular waveguides.