Abstract: An electronic system. The electronic system includes a waveguide structure having a first waveguide-coupling point and a second waveguide-coupling point and an active electronic circuit having a first circuit-coupling point and a second circuit-coupling point. The second waveguide-coupling point is coupled to the first circuit-coupling point; the system is capable of receiving an input signal at the first waveguide-coupling point and transmitting an output signal at the second circuit-coupling point and/or receiving the input signal at the second circuit-coupling point and transmitting the output signal at the first waveguide-coupling point; the input signal and the output signal have frequencies in a terahertz frequency range; and the system is fabricated as a monolithic integrated structure having the waveguide structure fabricated by micromachining and the circuit fabricated monolithically.

Abstract: Disclosed herein is an imaging device including: a first substrate having a first communication device; a second substrate having a solid-state imaging device and second communication device to exchange signals with the first substrate; a shake correction section adapted to detect the shake of an enclosure and correct the shake based on the detection result by moving the first substrate in the plane vertical to the optical path; and a millimeter wave signal transmission line that permits transmission of information in the millimeter wave band between the first and second communication devices, wherein a signal to be transmitted between the first and second communication devices is converted into a millimeter wave signal first before being transmitted via the millimeter wave signal transmission line.

Abstract: A high-frequency module according to the present embodiment includes a substrate, a circuit board, and a waveguide. The substrate has an input-output portion for high-frequency signals on one surface thereof. The circuit board has a dielectric waveguide line with its end face exposed, and is placed on the one surface of the substrate such that a virtual plane extending beyond the end face is intersected by the one surface of the substrate. The waveguide has openings at ends thereof, in which one of the openings is connected to the end face of the dielectric waveguide line, and the other opening is connected to the input-output portion of the substrate.

Abstract: A substrate integrated waveguide (10) comprises a top conductive layer (14) and a bottom conductive layer (15) provided on either sides a substrate (11). At least one wall (12, 13) of conductive material is provided in the substrate (11) to define, together with the top and bottom layers (14, 15), the waveguide. The at least one wall (12, 13) comprise a multitude of thin conductive wires densely arranged close to each other in the substrate (11) and having respective short ends connected to the top and bottom layers (14, 15). The high number of wires per surface unit in the wall (12, 13) effectively prevent significant amount of power leakage through the wall (12, 13) during operation of the substrate integrated waveguide (10).

Abstract: The invention relates to a waveguide (24) for focusing electromagnetic energy on an area of interest, said waveguide (24) comprising outer walls forming a channel with a width (w) and a height (h) for the propagation of the electromagnetic waves. In order to be able to focus the EM waves on an area of interest, i.e. the chest of a patient (20), so that influences which other moving objects in the environment have on the waves, are shielded away, the channel is provided with a first opening and a second opening wherein said walls are non-metal hollow walls filled with an electrically conductive liquid. The waveguide (24) can be used for example with a computed tomography system (12) CT with a rotating gantry (16) and a patient table (18). The waveguide (24) will not produce artefacts in the CT image by scattering the X-ray, like a metal wall would do it. Nevertheless the conductive liquid makes the construction work as a waveguide for EM waves.

Abstract: There are provided a waveguide forming apparatus, a dielectric waveguide forming apparatus, a pin structure and a high frequency circuit that can optimize a circuit portion provided therein and have high versatility. A waveguide is formed by allowing first and second conductive layers (6, 7) to cooperate with a plurality of control pins (2). A variable high frequency circuit forming portion is freely and simply changed by displacing each control pin (2) between a down-status indicated by Z1 and an up-status indicated by Z2.

Abstract: It is possible to obtain a wide-band feeder circuit a lower conductive plate provided substantially in parallel to an upper conductive plate, a short-circuit portion provided in a concave manner at a central portion of the lower conductive plate, and a countersunk portion provided in a convex manner at a central portion of a short-circuit plate forming a bottom of the short-circuit portion. It is also possible to obtain an antenna including such a wide-band feeder circuit.

Abstract: An apparatus has a waveguide that includes a multiferroic medium. A controller is configured to apply a mechanical strain or a control electric or magnetic field to the multiferroic medium. The multiferroic medium has a dielectric permittivity or magnetic permeability that is responsive to the strain or the control field.

Abstract: A satellite antenna device is provided. The satellite antenna device includes a body, a wave guide, and a dielectric member. The wave guide is connected to the body. The dielectric member is connected to the wave guide, wherein the dielectric member comprises a first portion and a second portion, the first portion has a protruding structure, the protruding structure is formed surrounding a central axis of the wave guide, the second portion has a concave structure, and the concave structure corresponds to the protruding structure, and is matched therewith.

Abstract: Provided are integrated electronic components which include a waveguide microstructure formed by a sequential build process and an electronic device, and methods of forming such integrated electronic components. The microstructures have particular applicability to devices for transmitting electromagnetic energy and other electronic signals.

Abstract: Techniques, apparatus and systems that use composite left and right handed (CRLH) metamaterial structures to combine and divide electromagnetic signals at multiple frequencies. The metamaterial properties permit significant size reduction over a conventional N-way radial power combiner or divider. Dual-band serial power combiners and dividers and single-band and dual-band radial power combiners and dividers are described.

Abstract: Provided is an unlimited single-layer metamaterial structure having negative permittivity and negative permeability in a frequency bandwidth desired by a user. The metamaterial structure includes: a dielectric having a single layer structure having a permittivity or a multi-layer structure in which at least one layer has a different permittivity; and a single conductor disposed in the dielectric, wherein the metamaterial structure has a permittivity, a permeability, and a refractivity that have 0 or a negative value in a predetermined frequency band.

Abstract: Provided is an apparatus for transitioning a millimeter wave between dielectric waveguide and transmission line using a millimeter wave transition structure formed by the dielectric waveguide, the transmission line, and a slot to transition a signal with lower losses. The apparatus includes: transmission lines disposed respectively at input and output terminals on an uppermost dielectric substrate in a signal transition direction and adapted to transition a signal; a dielectric waveguide formed by a via array disposed between top and bottom ground surfaces of a lowermost dielectric substrate in the signal transition direction as a signal transition path; and slots disposed at a signal transition path of an upper ground surface of each dielectric substrate to connect the transmission lines to the dielectric waveguide so as to transition a signal from the transmission line of the input terminal to the transmission line of the output terminal through the dielectric waveguide.

Abstract: A waveguide of a multi-layer metal structure and a manufacturing method thereof are provided, the method including applying a plurality of metal layers on a substrate and a plurality of insulating layers respectively between the respective metal layers. Accordingly, it is possible to minimize conductive loss by dispersing current uniformly through wide regions between a signal line and ground lines.

Abstract: The invention relates to a high-frequency transmission line connection structure, a circuit board having the connection structure, a high-frequency module having the circuit board, and a radar apparatus. A first laminated waveguide sub-line part (21) includes a pair of main conductor layers that oppose each other in a thickness direction with a dielectric layer (31) having the same thickness as a dielectric layer (31) of a microstrip line (1) interposed therebetween. A second laminated waveguide sub-line part (22) includes dielectric layers (31, 32) thicker than the dielectric layer of the first laminated waveguide sub-line part (21). A laminated waveguide main-line part (23) includes dielectric layers (31, 32, 33) thicker than the dielectric layers of the second laminated waveguide sub-line part (22). A conversion part (10) connected to the microstrip line (1) is formed by integrating with an upper main conductor layer constituting the respective line parts.

Abstract: A communication device consistent with certain implementations has a coaxial cable having length and first and second ends. The coaxial cable further has a central conductor, a dielectric insulator surrounding the central conductor, and an electric shield conductor surrounding the dielectric insulator. The dielectric insulator serves as a dielectric waveguide having a characteristic impedance Z at an operating frequency range. A termination for electrical energy coupled into or out of the dielectric insulator at approximately the characteristic impedance Z at the operating frequency range to utilize the dielectric insulator as a waveguide for transmission of signals along the length of the coaxial cable, and wherein the center conductor is further used to communicate an electrical signal between the first and second ends. This abstract is not to be considered limiting, since other embodiments may deviate from the features described in this abstract.

Abstract: The invention relates to a waveguide system for distributing high-bandwidth signals in a multilayer circuit carrier. The waveguide system comprises at least one coplanar waveguide (2) and one or more ground wires (3, 4). The coplanar waveguide (2) is disposed with the ground wires (3, 4) associated therewith between at least two insulating layers (5, 6) of the circuit carrier. The surface of the two insulating layers oriented away from the plane of the waveguide (2) has electrically conductive layers (7, 8). Electrically conductive plated through-holes (9, 10) extend along the waveguide (2) substantially perpendicular to the plane of the waveguide. The ground wires (3, 4), the electrically conductive layers (7, 8), and the plated through-holes (9, 10) are electrically connected to ground potential. The waveguide system serves particularly for the three-dimensional distribution of high-bandwidth signals.

Abstract: An arrangement for providing communication between a radio antenna and a radio base station in a cellular communication system. A waveguide is configured to connect the radio base station to the antenna. The waveguide may be connected directly or indirectly to the radio base station and/or the antenna. The waveguide is configured with a number of compartments, each compartment acting as a waveguide for a particular signal. The arrangement is thus able to convey a large number of signals, for example, for sector antennas of dual polarization type and for more than one frequency band.

Abstract: Complementary metamaterial elements provide an effective permittivity and/or permeability for surface structures and/or waveguide structures. The complementary metamaterial resonant elements may include Babinet complements of “split ring resonator” (SRR) and “electric LC” (ELC) metamaterial elements. In some approaches, the complementary metamaterial elements are embedded in the bounding surfaces of planar waveguides, e.g. to implement waveguide based gradient index lenses for beam steering/focusing devices, antenna array feed structures, etc.

Abstract: The invention relates to a high-frequency circuit board that can efficiently radiate heat generated in a mounted electronic component without reducing the degree of freedom in design, a high-frequency circuit module including the high-frequency circuit board, and a radar apparatus including the high-frequency circuit module. A dielectric substrate (3) includes a mounting portion (4) that is disposed on one surface (3a) of the dielectric substrate (3) and on which an electronic component (2) is to be mounted, and a waveguide (5) that is formed in the dielectric substrate (3). The mounting portion (4) and the waveguide (5) are connected with each other through a heat conductor (6) having a thermal conductivity higher than that of the dielectric substrate (3).

Abstract: A gas turbine engine has a signal transmission system comprising a waveguide 40 which enables the transmission of microwave radio signals between a rotor 24 and stationary receiving electronics 32 of the engine. The waveguide 40 is centred on the engine axis 9.

Abstract: A sandwich vehicle structure may allow for confined propagation of electromagnetic radiation within the sandwich vehicle structure. The sandwich vehicle structure may include at least one upper conducting plate, at least one lower conducting plate, and a core extending between the upper and lower conducting plates. The core may comprise a core medium, and a plurality of spaced apart core members embedded in the core medium and extending between the upper and lower conducting plates. The core medium and the core members may allow for the propagation of electromagnetic radiation within the core.

Abstract: A ferroelectric varactor suitable for capacitive shunt switching is disclosed. High resistivity silicon with a SiO2 layer and a patterned metallic layer deposited on top is used as the substrate. A ferroelectric thin-film layer deposited on the substrate is used for the implementation of the varactor. A top metal electrode is deposited on the ferroelectric thin-film layer forming a CPW transmission line. By using the capacitance formed by the large area ground conductors in the top metal electrode and bottom metallic layer, a series connection of the ferroelectric varactor with the large capacitor defined by the ground conductors is created. The large capacitor acts as a short to ground, eliminating the need for vias. The varactor shunt switches can be used to create a bandpass filter and a tunable notch filter. The bandpass filter is implemented by cascading the switches, and the bandpass filter implemented through the use of a resonance circuit.

Abstract: There is provided a waveguide structure including a first member, made of metal, in a surface portion of which a first groove having a linear shape is formed; and a second member, made of resin, in a surface portion of which a second groove having a linear shape is formed and to the surface of which metal plating is applied. The first member and the second member are arranged in such a way that the first groove and the second groove face each other so that the waveguide as a waveguide tube is configured. The first member in the surface portion of which the first groove is formed and the second member in the surface portion of which the second groove is formed are held in such a way that a gap exists between the respective surfaces thereof. As a result, there can be obtained a waveguide structure that is superior in the heat radiation performance and is divided so that contact friction can be prevented from causing separation of the metal plating.

Abstract: An acoustic (sound or ultrasound) wave transmitter having a plurality of waveguides is described, and a method of making such a transmitter is described. Each waveguide can have a cladded core. The core can be a liquid such as water, alcohol or mineral oil. Alternatively, the core can be a colloidal gel, such as gelatin dissolved in at least one of water, vinyl plastisol or silicone gel. The cladded core is capable of transmitting acoustic wave energy from a first end surface to a second end surface of the cladded core. The waveguides can be substantially fixed relative to each other by a binder. The binder can be formed by fusing the claddings together, potting a material between the waveguides and/or mechanically holding the waveguides.

Abstract: A surface-mountable waveguide arrangement comprising a dielectric carrier material having a first main side and a second main side, the second side comprising a ground plane, and the first side being arranged to form a microwave circuit layout by means of metallization patterns on the respective sides. The microwave circuit layout comprises a footprint for a surface-mountable waveguide part, the waveguide part comprising an open side, a part of the footprint constituting a closing wall arranged for closing the open side. The waveguide part is arranged for being mounted to a footprint solder area comprised in the footprint, having an outer contour and corresponding to a solderable contact area on the waveguide part. A solderstop line is formed on the footprint, at least partly defining a border between the closing wall and the footprint solder area. The present invention also relates to a dielectric carrier.

Abstract: The design and use of a simplified, highly efficient, waveguide-based wireless distribution system are provided. A low-loss waveguide is used to transport wireless signals from a signal source or sources to one or more receiver locations. One or more adjustable signal coupling devices partially insert into the waveguide at predetermined locations along the length of the system to provide variable, controlled extraction of one or more wireless signals. Low-loss impedance matching circuitry is provided between the waveguide coupling devices and output connectors to maintain high system efficiency. The system offers the capability of supplying signals of high strength and high quality to a large number of receivers in a wide wireless coverage area via a plurality of signal radiators. Some embodiments of the system are readily adaptable for wireless distribution service in HVAC plenum spaces. A system that combines the functions of fire extinguishing and waveguide wireless distribution is also disclosed.

Abstract: A waveguide structure or a printed-circuit board is formed using a plurality of unit structures which are repetitively aligned in a one-dimensional manner or in a two-dimensional manner. The unit structure includes first and second conductive planes which are disposed in parallel with each other, a transmission line having an open end which is formed in a layer different from the first and second conductive planes and positioned to face the second conductive plane, and a conductive via electrically connecting the transmission line to the first conductive plane.

Abstract: An antenna apparatus can reduce gaps between laminated plates with a simple structure, and can be produced at low cost and in a small size, while ensuring reliability over a long period of time. The apparatus includes a base having a base transmission line portion, a laminated body that is composed of laminated plates placed on the base and has laminated body transmission line portions in communication with the base transmission line portion, and an antenna main body placed on the laminated body for emitting or receiving electromagnetic waves, wherein the base, the laminated plates and the antenna element plate are coupled with one another through surface to surface contact. The antenna main body has a curved plate formed of an arc-shaped elastic member protruding toward the base in a state before assembly, and the curved plate has an elastic force contributing to the coupling through surface to surface contact.

Abstract: A waveguide arrangement having a longitudinal extension, along which an electromagnetic wave may propagate, and comprising at least one waveguide part and a feeding arrangement which is arranged for feeding said waveguide part with a first polarization and a second polarization, said polarizations being mutually orthogonal. The feeding arrangement comprises a dielectric carrier material comprising a first feeding conductor, feeding the first polarization and a second feeding conductor, feeding the second polarization, where the first polarization is excited by means of first excitation means fed by said first feeding conductor and the second polarization is excited by means of second excitation means fed by said second feeding conductor, where at least one excitation means is a symmetrical structure with respect to the longitudinal extension.

Abstract: An embodiment relates to a coplanar waveguide electronic device comprising a substrate whereon is mounted a signal ribbon and at least a ground plane. The signal ribbon comprises a plurality of signal lines of a same level of metallization electrically connected together, and the ground plane is made of an electrically conducting material and comprises a plurality of holes.

Abstract: A horn antenna includes a conducting horn having an inner wall and a first dielectric layer lining the inner wall of the conducting horn. The first dielectric layer includes a metamaterial having a relative dielectric constant of greater than 0 and less than 1. The horn antenna may further include a dielectric core abutting at least a portion of the first dielectric layer. In one aspect, the dielectric core includes a fluid. A waveguide including a metamaterial is also disclosed.

Abstract: An apparatus comprising a parallel plate waveguide (PPWG) comprising two plates separated by a distance that supports a multimode wave, and a transmitter configured to emit a wave having a frequency from about one hundred Gigahertz (GHz) to about ten terahertz (THz) and to couple to one mode of the PPWG. Also disclosed is an apparatus comprising two plates substantially parallel to one another and separated by at least about five millimeters (mm), and an antenna coupled to the two plates and configured to transmit or receive a wave having a frequency from about one hundred GHz to about ten THz. Disclosed is a method comprising polarizing an electromagnetic beam in the first transverse electric (TE1) mode with respect to a PPWG comprising two plates, adjusting the diameter of the electromagnetic beam based on the separation between the plates, and sending the electromagnetic beam into the PPWG.

Abstract: A waveguide in semiconductor integrated circuit is disclosed, the waveguide comprises a horizontal first metal plate, a horizontal second metal plate above the first metal plate, separated by an insulation material, and a plurality of metal vias positioned in two parallel lines, running vertically through the insulation material in contacts with both the first and second metal plates, wherein the first and second metal plates and the plurality of metal vias form a metal enclosure in a cross-sectional view that can serve as a waveguide.

Abstract: A traveling wave amplifier circuit to receive an RF wave and an electron sheet beam and to effect synchronized interaction therebetween. The circuit includes a wave guide having at least a first wall and a second wall opposite the first wall. The first wall and the second wall are connected to define an axis of propagation and a rectangular wave guide cross-section that is normal to the axis of propagation. The circuit further includes a plurality of first projections located on an interior surface of the first wall of the wave guide, the first projections being pitched in a direction of the axis of propagation. The circuit further includes a plurality of second projections located on an interior surface of the second wall of the wave guide, the second projections being pitched in a direction of the axis of propagation.

Abstract: A method and apparatus for producing a distributed plasma at atmospheric pressure. A distributed plasma can be produced at atmospheric pressure by using an inexpensive high frequency power source in communication with a waveguide having a plurality particularly configured couplers disposed therein. The plurality of particularly arranged couplers can be configured in the waveguide to enhance the electromagnetic field strength therein. The plurality of couplers have internal portions disposed inside the waveguide and spaced apart by a distance of ½ wavelength of the high frequency power source and external portions disposed outside the waveguide and spaced apart by a predetermined distance which is calculated to cause the electromagnetic fields in the external portions of adjacent couplers to couple and thereby further enhance the strength of the electromagnetic field in the waveguide. Plasma can be formed in plasma areas defined by gaps between electrodes disposed on the external portions.

Abstract: There are provided a waveguide plate that is made of metallic plates through which through holes are formed and a pair of resin made substrates (first and second substrates) on which a grounding pattern is formed to cover the through holes. Both the waveguide plate and the substrates are laminated with each other using a conductive adhesive such that the waveguide plate is sandwiched by the substrates, whereby a rectangular waveguide is provided. The first substrate has high frequency circuits such as an oscillator that generates high frequency signals. The high frequency signals generated by the oscillator are supplied to an antenna section that is formed on the second substrate via the rectangular waveguide.

Abstract: The present invention relates to a microwave component with an at least partially enclosed cavity, such as a microwave filter, a waveguide or a horn antenna, comprising an outer support structure (A) and an electric layer (C) which is made of pulse-plated silver and which is arranged on the inside of the support structure and faces the cavity. The microwave component is distinguished in that it further comprises a first inner protective layer of chemically precipitated gold (D), said a protective layer being arranged on the electric layer (C) and facing the cavity.

Abstract: An aircraft structure having properties of an electromagnetic cavity is used to enhance wireless transmission for at least one of wireless data communication and wireless power transmission.

Abstract: Filter and manifold compensation assemblies for thermal compensation of a filter cavity and a manifold which include at least one a lever element pivotally coupled to the filter or manifold at a first pivot point, an anchoring element pivotally coupled to the lever element at the second pivot point and secured to the housing of the filter or manifold, and a thermal expansion element having a lower coefficient of thermal expansion than the filter cavity or manifold and pivotally coupled to the lever element. The relative thermal expansion of the thermal expansion element in comparison with the thermal expansion of the filter or manifold causes the lever element to articulate and to displace the housing for thermal compensation. The degree of each displacement is proportional to the ratio between the distance between the second and first pivot points and the distance between the second and the third pivot points.

Abstract: A waveguide including: a first section including a first surface, a second surface, an upper wall, and a lower wall facing the upper wall; and a second section extending from the second surface; wherein the first section includes an upper ridge on the upper wall of the first section and a lower ridge on the lower wall of the first section, wherein the second section includes an upper conductor extending from a top portion of the second surface and a lower conductor extending from a lower portion of the second surface with a gap between the upper and lower conductors, wherein the upper conductor is electrically connected to the upper ridge, wherein the lower conductor is electrically connected to the lower ridge, and wherein the upper and lower conductors are adapted to propagate a wave and reduce discontinuity of the wave a connection between the first and second sections.

Abstract: A microwave pulse compressor has an elongated, cross-sectionally oversized waveguide resonator for decreasing the attenuation of the resonator, thereby increasing the resonator's QO The increased Q of the resonator guide results in more stored energy and greater output pulse power. The pulse compressor is constructed to suppress high order modes that can be generated in oversized waveguides. The higher order modes are suppressed by any means, including, separately or in combination, the input coupling design, choice of the resonator length, and the design of the output coupling structures. In one alternative aspect of the invention, the switch at the switch-out end of the waveguide resonator is a plasma switch, employing at least one dielectric window positioned in the resonator guide to have minimum effect on the resonator Q. The dielectric window contains a relatively large volume of a switch gas at low pressure within a switching section of the resonator guide at the guide's switch-out end.

Abstract: Various embodiments of the present invention are directed to global interconnects that employ metamaterial-based waveguides to distribute clock signals to IC internal components. In one embodiment of the present invention, a global interconnect includes an electromagnetic radiation source that radiates electromagnetic waves. The global interconnect also includes a metamaterial-based waveguide that directs a transverse magnetic field mode of the electromagnetic wave to antennae of the internal components in order to induce an oscillating current within the internal components that serves as the clock signal.

Abstract: A waveguide and an attenuation pole waveguide bandpass filter with a simple structure without any additional structure such as a negative cross coupling between resonators. The attenuation pole waveguide bandpass filter arranged at right angle to the longitudinal direction (radio wave propagation direction) is composed only of conductors. The conductor comprises depressions each opening outwardly and having a non-conducting region which continues from the inside of the opening section to the outside, and a window in the conductor section between these opposed depressions. In an alternative embodiment, such conductor shall be covered by a dielectric such as a resin.

Abstract: Systems for THz transmission using new types of THz waveguides with low loss, negligible group velocity dispersion and structural simplicity are described herein. The THz system incorporates the use of a waveguide with two or more substantially parallel conductive elements which may enable many new THz sensing applications. It is now possible to direct the THz pulse inside of containers or around corners, where line-of-sight optics are not practical. Moreover, the systems allow use of either radially polarized or linearly polarized THz antennas. The disclosed systems are compatible with existing terahertz generation and detection techniques.

Abstract: There are provided a waveguide forming apparatus, a dielectric waveguide forming apparatus, a pin structure and a high frequency circuit that can optimize a circuit portion provided therein and have high versatility. A waveguide is formed by allowing first and second conductive layers (6, 7) to cooperate with a plurality of control pins (2). A variable high frequency circuit forming portion is freely and simply changed by displacing each control pin (2) between a down-status indicated by Z1 and an up-status indicated by Z2.

Abstract: The present invention provides a waveguide for the TM mode having a simpler configuration. The waveguide has: a pair of main ground electrodes (2a) and (2b) disposed so as to face each other in parallel with each other with a dielectric block (4) in between; and a pair of side walls (3a) and (3b), each constructed of a plurality of sub ground electrodes (11) provided between the pair of main ground electrodes (2a) and (2b), the sub ground electrodes (11) stacked in parallel with the main ground electrodes (2a) and (2b) with a interval along a direction orthogonal to the main ground electrodes (2a) and (2b). Electromagnetic waves in the TM mode may propagate in a region (5) surrounded by the pair of main ground electrodes (2a) and (2b) and the pair of side walls (3a) and (3b).

Abstract: The invention performs uniform chemical reactions with high efficiency by action of microwave onto reaction targets placed within a flow path along a center axis of a waveguide for transmission of microwave. The microwave chemical reaction device includes a circular waveguide for transmission of TM or TE mode microwave or a square waveguide for transmission of TE mode microwave and a flow path shielded from a space within the waveguide by a bulkhead of low microwave loss and coaxially extending along the center axis of the waveguide. Reaction targets to be subjected to chemical reactions are accommodated in the flow path and the microwave acts on the reaction targets within the flow path.

Abstract: According to some embodiments, a waveguide cable includes a dielectric core and a conducting layer surrounding the dielectric core. A first antenna may be provided at a first end of the waveguide cable to receive a digital signal and to propagate an electromagnetic wave through the dielectric core. A second antenna may be provided at a second end of the waveguide cable, opposite the first end, to receive the electromagnetic wave from the dielectric core and to provide the digital signal.

Abstract: A system for coupling teraherz (THz) radiation to a coaxial waveguide comprises an antenna that generates THz radiation having a mode that matches the mode of the waveguide. The antenna may comprise a pair of concentric electrodes, at least one of which may be affixed to or formed by one end of the waveguide. The radiation may have wavelengths between approximately 30 ?m and 3 mm. The waveguide may comprise an inner core and an outer wall defining an annular region. A terahertz sensor system may comprise a terahertz antenna comprising first and second concentric electrodes, means for generating a field across the trodes and means for triggering the emission of terahertz radiation, a first waveguide having first and second ends, said first end being coupled to said antenna so as to receive at least a portion of said terahertz radiation, and a sensor for detecting said terahertz radiation.