Abstract: An electronic device may have wireless circuitry with antennas. The electronic device may have a dielectric housing. A printed circuit board with electrical components may be mounted in the dielectric housing. Heat spreader structures may be used to dissipate heat from the electrical components. The heat spreader structures be configured to form antenna cavities. The antennas in the electronic device may be formed from the antenna cavities and may have antenna resonating elements formed on the printed circuit. An electrical component such as a light-emitting diode may be mounted in one of the antenna cavities. Each antenna element may be an inverted-F antenna resonating element with short and long arms. The short arm of each antenna resonating element may be formed from edge plated metal traces on an edge of the printed circuit.

Abstract: A mode extractor for extracting TM01 mode from an electromagnetic signal, including a first and second turnstile junction, each of the turnstile junctions having first port, four second ports of rectangular waveguide which are mutually orthogonal and orthogonal to first port and matching section provided at least partially in center region of respective turnstile junction, center region being located at intersection of first port and four second ports wherein first and second turnstile junction are arranged so that longitudinal axes of their first ports are aligned with each other and their first ports are facing in opposite directions, each of the second ports of first turnstile junction is electromagnetically coupled to corresponding one of second ports of second turnstile junction, and a coaxial coupling device is inserted into matching section of first turnstile junction so that a portion of coaxial coupling device extends into first port of first turnstile junction.

Abstract: Embodiments of present inventions relate to low-profile, tapered cavity broadband antennas. One important aspect of the invention (although not the only) is the incorporation of a tapered lateral sidewalls in the antenna cavity. More particularly, according to various embodiments, a low-profile, tapered cavity antenna may comprise: an aperture defining an opening to a cavity; and an interior space defined by the cavity which is formed of a flat bottom wall defining a ground plane, and a pair of spaced-apart, tapered lateral sidewalls extending away from the flat bottom wall in opposite directions toward the aperture. The tapered shape of the tapered lateral sidewalls are specifically configured to maintain a constant resonance frequency within the cavity. In some embodiments, an isotropic high index medium material is at least partially loaded within the tapered cavity. Also, antenna may include a single or two-input port.

Abstract: Embodiments of the present invention relate to low-profile broadband antennas having an anisotropic traverse resonance condition. One important aspect of the invention is the incorporation of an anisotropic high index medium material, at least partially loaded within the cavity, which is configured to maintain a constant resonance frequency of the antenna. A low-profile cavity antenna may comprise: an aperture defining an opening to a cavity; an interior space defined by the cavity which is formed of a flat bottom wall defining a ground plane, and a pair of spaced-apart, lateral sidewalls extending away from the flat bottom wall in opposite directions toward the aperture; and an anisotropic high index medium material, at least partially loaded within the cavity, configured to maintain a constant resonance frequency of the antenna. The lateral sidewalls may extend from opposing sides of the flat bottom wall perpendicularly or with an outwardly taper.

Abstract: A radiating element may comprise an antenna element, a radiating element edge, and a corrugation. The antenna element may have an aperture that extends into the antenna element, and an aperture side defining an aperture area of the antenna element. The radiating element edge may surround the antenna element on the aperture side. The corrugation may be configured to separate, at least on the aperture side, the antenna element and the surrounding radiating element edge. The radiating element edge may be connected to the antenna element at a distance greater than zero from the aperture side of the antenna element.

Abstract: An antenna system capable of achieving simultaneous transmit and receive (STAR) operation over a wide bandwidth includes a ring array of TEM horn elements and a centrally located monocone or bicone antenna. The TEM horn elements each include a capacitive feed. The elements of the ring array are excited using a phasing scheme that results in signal cancellation at the location of the central element. The ring array may serve as either the transmit antenna or the receive antenna.

Abstract: An antenna includes a plurality of upper electrodes in a first metal layer, a plurality of lower electrodes in a second metal layer, a plurality of side electrodes connecting the upper electrodes with the lower electrodes, and a ground structure. The upper electrodes, the lower electrodes and the side electrodes form one continuous electrode. The continuous electrode extends in a first direction away from a reference plane over a substrate. The upper electrodes extend in a second direction different from the first direction. The upper electrodes, the lower electrodes, and the side electrodes are embedded within a waveguide structure that includes a dielectric material. The substrate has a length extending in the first direction greater than a length the continuous electrode extends in the first direction. The waveguide structure includes a portion of the substrate in a region beyond the length of the continuous electrode in the first direction.

Abstract: The present invention is related to a device for generating waveguide modes for use in a feed horn of a satellite antenna system, said waveguide modes comprising at least one excitation mode of higher order than the fundamental mode, said device comprising a waveguide containing a first waveguide section with at least three longitudinal slots extending in the inner side of said waveguide, characterized in that said waveguide contains a second waveguide section with at least three longitudinal slots extending in said inner side of said waveguide.

Abstract: An RFID device includes a conductive sheet defining at least first and second portions, with an intermediate portion joining the other portions. One or more RFID chips electrically coupled to the portions, such as one or both of the first and second portions of the conductive sheet and to the intermediate portion. The first portion of the conductive sheet defines a multi-turn high frequency antenna having one or more disruptions in the conductive sheet positioned between and/or defining adjacent turns of the multi-turn antenna. The second portion of the conductive sheet defines a first radiating arm of an ultra high frequency antenna. The disruptions direct a high frequency current around the turns of the multi-turn high frequency antenna, while allowing an ultra high frequency current to flow across the disruptions, resulting in the first portion of the conductive sheet defining a second radiating arm of the ultra high frequency antenna.

Abstract: A radio frequency (RF) remote controller device comprises radio frequency (RF) circuitry operably coupled to an antenna arrangement and arranged to transmit and receive RF signals to and from controllable devices. The RF remote controller device further comprises signal process logic operably coupled to the RF circuitry and to a user interface. The antenna arrangement is arranged to comprise a directivity characteristic. The signal processing logic upon receipt of a command input from the user interface, is arranged to: determine at least one link quality value that is at least partly dependent upon the directivity characteristic for the at least one controllable device; and select the controllable device for remote controlling based on the determined at least one link quality value.

Abstract: An apparatus includes an IC package comprising a substrate having a first metal layer, a second metal layer, and a dielectric layer disposed between the first and second metal layers. The IC package further comprises an IC die disposed at a surface of the substrate and comprising RF circuitry. The first metal layer comprises a microstrip feedline extending from a pin of the IC die. The microstrip feedline includes a conductive trace having a probe element at a tip distal from the pin. The first metal layer further comprises a waveguide opening comprising a region surrounding the probe element, the region being substantially devoid of conductive material. The substrate further comprises a plurality of metal vias disposed at the perimeter of the region, the metal vias extending from the first metal layer to the second metal layer.

Abstract: Provided is a ultra-wideband dual linear polarized wave waveguide antenna for communication having a wideband matching structure in which the inner peripheral surface of the first polarized wave filtering unit or the second polarized wave filtering unit, which filters a first polarized wave or a second polarized wave entering the dual linear polarized wave waveguide antenna and orthogonal to each other, are tapered such that a diameter of the inner peripheral surface becomes smaller, and having an extended path so as to adjust the first polarized wave and the second polarized wave so that they are in-phase. By doing so, the ultra-wideband dual linear polarized wave waveguide antenna is capable of both receiving and transmitting and thus can be used for communication, and can adjust skew angles without being mechanically rotated.

Abstract: A continuous horn or flared radiator antenna system is provided. The antenna system provides for steering a beam within at least a first plane (e.g., in azimuth). Steering a beam includes selecting an operative portion or segment of a circular array of elements or probe feeds. Steering can also include electronically steering the resulting beam within a coverage area provided by the selected segment of probe feeds. The electronic steering within the coverage area can be performed through the selective operation of phase shifters. Multiple continuous horn radiator structures can be provided to support pointing or steering of a beam in a second plane (e.g., in elevation), operation in multiple frequency bands, and/or simultaneous transmission and reception of signals.

Abstract: An antenna may include a primary reflector having a ring focus; a feed body along an axis of the primary reflector, the feed body including a circular waveguide coaxial with the axis of the primary reflector; a sub-reflector disposed facing an end of the circular waveguide; and a generally cylindrical stem extending from a center of the sub-reflector into the circular waveguide to form a section of annular waveguide. A sub-reflector support may mechanically connect a perimeter of the sub-reflector and an outside surface of the feed body. The sub-reflector, the stem, and the feed body may be collectively configured to couple microwave energy between the annular waveguide and the primary reflector.

Abstract: Embodiments of the present invention concerns an aperture antenna that comprises: a receiving element, which includes an aperture and is configured to receive, through the aperture, radio signals having frequencies within a given band of radio frequencies; a waveguide configured to receive radio signals from the receiving element; and a frequency selective structure, which is arranged between the receiving element and the waveguide, and comprises metamaterial structures that extend partially inside the receiving element and/or partially inside the waveguide and that are configured to cause the propagation, from the receiving element to the waveguide, of only the received radio signals that have frequencies comprised within a predetermined sub-band of the given band of radio frequencies. Furthermore, the frequency selective structure is configured to reflect back into the receiving element the received radio signals that have frequencies not comprised in the predetermined sub-band.

Abstract: A rectangular helix antenna in an integrated circuit includes upper electrodes disposed in a first metal layer, lower electrodes disposed in a second metal layer, and side electrodes connecting the upper electrodes with the lower electrodes, respectively. The upper electrodes are disposed at an angle with respect to the lower electrodes. The upper electrodes, the lower electrodes, and the side electrodes form one continuous electrode spiraling around an inner shape of a rectangular bar. A micro-electromechanical system (MEMS) helix antenna has a similar structure to the rectangular helix antenna, but can have an inner shape of a bar.

Abstract: The purpose of the present invention is to reduce the cost of a product while ensuring reliability of the product as a wireless transmission/reception apparatus. Provided is communication apparatus (ODU) (1) installed outside, which includes a case that houses a transmission unit for transmitting a signal and a reception unit for receiving the signal, and a waveguide connected to an external antenna and configured to receive/transmit a signal. In the apparatus, the waveguide is formed integrally with the case, and taper (16) is formed in a part of the tube hole of the waveguide.

Abstract: The present invention provides a substrate-embedded antenna and an antenna array constituted by said antennas. An antenna of the present invention comprises a plurality of substrates, a metal fill and a feed line. Each of the substrates has at least one through-hole. The metal fill is placed within each through-hole, and each metal fill placed therein connects one another to form a columnar metal conductor which acts as a radiating body of the antenna. The feed line is electrically coupled to the metal conductor to input and output electrical signals. A plurality of said antennas may constitute an antenna array.

Abstract: Electrically large, stepped-wall or smooth-wall, direct-radiating horn antenna apparatus that may preferably be used in satellite spot beam applications. Exemplary electrically large smooth-wall horn antenna apparatus comprises one or more input ports, an electrically large output port, and a smooth-wall or stepped-wall tapered section having a spline-shaped profile extending from the input port(s) to the output port of the apparatus. The spline-shaped profile is preferably monotonic and is preferably configured to generate a spot beam. The spline-shaped profile may be configured to support multiple frequency bands, and dual simultaneous polarization having either linear or circular polarization. The spline-shaped profile is defined by spline knots, and, the knot radii form a nondecreasing sequence. Preferably, the spline-shaped profile comprises a piecewise cubic Hermite interpolating polynomial spline that interpolates the shape of curves between the spline knots.

Abstract: A miniature interrogator antenna assembly including: a housing; a first miniature horn antenna in the housing having a first aperture; a second miniature horn antenna in the housing having a second aperture. The first and second miniature horn antennas are arranged in a canted configuration and are joint at a front of the assembly to form combined apertures at the front of the assembly. The antenna assembly further includes: a splitter/combiner having a matching portion, where the matching portion is positioned in the housing in such a way that an apex of the matching portion points to the front of the assembly; a plurality of annular grooves formed around the combined apertures at the front of the assembly; a sum input port coupled to a first waveguide with an H-plane bend feeding the splitter/combiner; and a difference input port coupled to a second waveguide feeding the splitter/combiner directly.

Abstract: A feeding apparatus includes a substrate, an annular grounded metal sheet having a first opening and a second opening, a rectangular grounded metal sheet extending from the annular grounded metal sheet toward an interior according to a configuration of a septum polarizer of a waveguide, a first parasitic grounded metal sheet extending from a side of the rectangular grounded metal sheet along a first direction, a second parasitic grounded metal sheet extending from another side of the rectangular grounded metal sheet along a second direction, a first feeding metal sheet extending from the first opening toward the interior and including a first portion, a second portion and a third portion and a second feeding metal sheet extending from the second opening toward the interior and including a fourth portion, a fifth portion and a sixth portion.

Abstract: A microwave antenna suitable for monopulse radar applications is operable over a broad frequency band. The antenna uses a horn with two walls. Each wall includes two ridges that extend into an inner region of the horn near the horn's base and then taper into the wall surfaces. The horn is coupled to two ridged waveguide sections with the ridges of the waveguide sections matched to opposed pairs of the horn ridges. The antenna may be coupled to electronics via standard waveguides. In many embodiments, dimensions of the waveguides coupled to the horn are smaller (to provide a small array spacing) than dimensions of the standard waveguides with a tapered waveguide section providing a transition. In one embodiment, the antenna operates with frequencies from 5.25 to 10.5 GHz.

Abstract: Substrate embedded horn antenna includes a dielectric, metal patterns, metal vias and a ground plate. The metal patterns are embedded by being stacked in dielectric. Metal patterns are hollow rectangle types or hollow circle types. Metal vias connect layers of metal patterns by being embedded between layers of metal patterns. Ground plate is formed in an upper side of dielectric. Metal patterns form waveguide structure by being stacked in radial shape. Waveguide structure propagates electromagnetic wave by focusing electromagnetic wave. Embedded horn antenna capable of selectively using vertical radiation and horizontal radiation may be implemented using the via and metal pattern in dielectric substrate. Embedded horn antenna may be implemented in small size with high gain. Vertical embedded horn antenna and horizontal embedded horn antenna may be implemented in a substrate. Method of manufacturing embedded horn antenna capable of selectively using vertical radiation and horizontal radiation may be provided.

Abstract: Provided is an antenna apparatus which employs a small number of antenna devices and is intended to obtain a desired pattern without adjusting amplitude level and phase of each antenna device. The antenna apparatus includes a first ridge horn antenna, and a second ridge horn antenna spaced apart from the first ridge horn antenna by a determined distance. Here, a multi-beam pattern is generated using a third-order mode beam pattern of a synthetic beam obtained by synthesizing beams respectively radiated from the first and second ridge horn antennas. Accordingly, the antenna apparatus can be simplified, and a desired multi-beam pattern can be obtained without adjusting signal level and phase of each antenna device. Also, by employing the ridge horn antennas as array devices, the antenna apparatus can be used in a wide frequency band.

Abstract: A radio frequency (RF) horn can include an interior surface with an inner geometry comprising irregular, aperiodic corrugations and/or undulations. The pattern of the inner geometry can excite higher order modes simultaneously in two RF signals each at a different frequency that combine with fundamental modes of the signals to produce substantially Gaussian profiles of the two signals at the output aperture of the horn. Even though the signals are at different frequencies, the illumination pattern of both signals on a reflector antenna at which the horn is directed can be substantially the same.

Abstract: A dual-band feed horn having a connection surface configured for connection to a waveguide and a first surface coupled to the connection surface. The first surface has a cylindrical surface with a length and a first diameter chosen to propagate TE11 modes for both a low frequency band and a high frequency band. The horn has a bandwidth ratio of the high-frequency band to the low frequency band in the range of 1.6-4.0. The horn also has a substantially conical surface coupled to the first surface at a first slope discontinuity. The conical surface includes multiple surfaces each having a respective slope and coupled to adjacent surfaces by a respective plurality of slope discontinuities each having a respective diameter. The slopes and diameters are chosen to generate primarily TM1,m modes (m=1, 2, 3, etc.) in the high-frequency band and primarily higher order TE1,n modes (n=2, 3, etc.) in the low-frequency band such that the low frequency band and the high frequency band have approximately equal beam widths.

Abstract: An antenna element-waveguide converter includes an antenna substrate having, on one surface, an antenna element and rectangular metal plates arranged in a plurality of rows to surround this antenna element, and a waveguide having, at one end, an opening opposed to the one surface of the antenna substrate. Surfaces of the rectangular metal plates and the opening of the waveguide are arranged with a predetermined gap left therebetween in a direction perpendicular to the one surface of the antenna substrate. Thus arranging the antenna substrate and the waveguide avoids a stress due to assembly variations, which can achieve favorable antenna characteristics.

Abstract: An antenna that resonates at each of at least operating two frequency bands includes a first LC parallel circuit having a first impedance between a feeding element and a feeding circuit, and a second LC parallel circuit having a second impedance between a parasitic element and ground. The feeding element and the parasitic element are configured such that multiple resonant frequencies are positioned between the two operating frequency bands in a case where the impedances of the first and second LC parallel circuits are set to 0, and the LC parallel circuits having the first and second impedances cause the multiple resonance frequencies to shift to an operating frequency band on the lower frequency side and to the higher frequency side, of the two operating frequency bands.

Abstract: The present invention relates to a horn antenna device. The horn antenna device has a step-shaped signal feed-in apparatus and a conical horn antenna. The step-shaped signal feed-in apparatus has a stepped body having multiple stairs and a connecting pin. The stepped body is adapted to radiate electromagnetic waves and receive a reflection of the electromagnetic waves. According to the structure of the step-shaped signal feed-in apparatus of the invention, the resonating modes are easy to be determined. The directivity and the signal-to-noise rate are improved. In addition, the connecting pin is directly connected to the stairs for improving the signal stability of the horn antenna device.

Abstract: Apparatus is provided to allow the reception and/or transmission of data signals at two different frequency bands. The apparatus includes a waveguide (4) which has a first section (6) of larger cross sectional area for receiving and/or transmitting the lower frequency band signals, and a reducing section (8) which leads to a section with a reduced cross sectional area in comparison to the first section (6) and this allows the receipt of the higher frequency band signals. In one embodiment sections of the waveguide can be rotated to allow the apparatus to be adjusted to any particular orientation to suit the particular circular polarity trans mission type at the location at which the apparatus is provided at that time.

Abstract: An antenna, including a ground region having a plurality of meandering slots formed therein, a generally conical radiating element supported on the ground region and spaced apart therefrom and a generally flat disk-shaped radiating element disposed between the generally conical radiating element and the ground region, the generally flat disk-shaped radiating element feeding the generally conical radiating element.

Abstract: A two-channel directional antenna for use in a radar level gauge. The antenna comprises a partition wall dividing the antenna into a first partition for emitting an electromagnetic transmit signal, and a second partition for receiving an electromagnetic echo signal, the partition wall having an outer potion located downstream in a direction of radiation of the antenna. The partition wall comprises an electromagnetic de-coupling structure, which is arranged to reduce any leakage of electromagnetic energy from the transmit signal into the echo signal. The electromagnetic de-coupling structure according to the present invention ensures that the leakage of transmit signal into the received signal is reduced to a satisfactory level.

Abstract: A feed horn includes at least a wave guiding unit which has a pipe and two dielectric layers. The pipe has an opening and at least an inner surface extending from the opening to an inside of the pipe. The dielectric layers have a larger dielectric constant than air and are fastened to the inner surface of the pipe in a way that the dielectric layers face each other. As a result, the dielectric layers can improve isolation and directivity of cross polarization waves and co-polarization waves received by the feed horn.

Abstract: An antenna for producing an omni-directional pattern, and using all frequencies of a frequency range simultaneously, is provided with first and second electrically conductive elements disposed coaxially relative to a central axis. The first element has a first surface of revolution about the axis, the first surface of revolution tapering radially outwardly while extending axially away from the second element to terminate at a first axial end of the first element. The second element has a second surface of revolution about the axis, the second surface of revolution tapering radially outwardly while extending axially toward the first element to terminate at a first axial end of the second element. The first and second surfaces of revolution overlap one another radially and axially, and are mutually non-conformal.

Abstract: A double ridge horn antenna has open sides between its mouth and a point where a transmission line is coupled to the double ridge structure, in an embodiment, the horn antenna is formed from two parts which when attached together form the double ridge structure.

Abstract: An antenna element employable singularly or in an array and configured for concurrent RF transmission and receipt on a plurality of frequencies concurrently. The element is formed of conductive material on a substrate by a pair of substantially identical horns extending in opposite directions to distal tips. A cavity formed between the horns narrows to a narrowest point prior to curving. The element is capable of wideband RF communication on any frequency between a low frequency defined by the distance between the distal tips to a highest frequency defined by the narrowest point of the cavity. The antenna is especially well adapted for portable devices such as smartphones where concurrent cellular, Wi-Fi, and bluetooth communications may be accomplished with a single element.

Abstract: A feed horn for a Low Noise Block down converter is disclosed. The feed horn includes a conical body for gathering satellite signals and a connector coupled to the conical body for coupling the feed horn to a waveguide of the Low Noise Block down converter to transmit the satellite signals to the waveguide. The conical body includes a plurality of corrugations, one of the plurality of corrugations includes a plurality of first openings, and a plurality of second openings, each of the plurality of second openings is formed between the two adjacent first openings, wherein the plurality of first openings and the plurality of second openings are used as slits to induce an interference effect to adjust a beam pattern of the feed horn.

Abstract: There is provided a wireless communication apparatus that includes (a) a printed circuit board, (b) a radio frequency circuit installed on the printed circuit board, and (c) an antenna element that is integrated onto the printed circuit board and electrically coupled to the radio frequency circuit via a printed conductor.

Abstract: A horn antenna for a radar device including a dielectric filling body arranged in a hollow horn section of a metal body and a dielectric cover attached to the filling body and sealingly closing the open end of the metal body. The filling body includes a first conical portion that is fittingly received in the hollow horn section, and a second conical portion that is situated away from the open end and dimensioned to leave a gap between itself and the wall of the hollow horn section. The dielectric filling body has a third portion between the first and second portions, where the third portion and the opposite portion of the wall of the hollow horn section are provided with circumferential grooves arranged in pairs opposite each other to provide a wear and maintenance-free attachment of the dielectric filling body in the horn antenna.

Abstract: A horn antenna for a radar device comprising a metal body having a tubular hollow waveguide section opening into a hollow horn section, a dielectric filling body filling up the inner space of the horn section, and a dielectric cover, wherein the horn antenna is configured to protrude in a measurement environment, protected from highly aggressive process environments and is usable over a wide temperature range.

Abstract: Embodiments are directed to a substrate integrated waveguide (SIW) antenna structure comprising: a first layer configured to route a signal, at least a second layer configured for antenna use coupled to the first layer, and a SIW antenna flared in the E-plane. Embodiments are directed to a method comprising: fabricating a first layer configured to route a signal, fabricating at least a second layer configured for antenna use, coupling the first layer and the at least a second layer, and flaring a substrate integrated waveguide (SIW) antenna in the E-plane.

Abstract: This disclosure provides an antenna device that includes a horn having a deeper-side portion and an opening-side portion, a feeder line, and an antenna element that is supplied with electric power from the feeder line to generate an electric wave, and radiates the electric wave from the horn. The feeder line is arranged parallel to the radiating direction of the electric wave.

Abstract: A microwave antenna suitable for monopulse radar applications is operable over a broad frequency band. The antenna uses a horn with two walls. Each wall includes two ridges that extend into an inner region of the horn near the horn's base and then taper into the wall surfaces. The horn is coupled to two ridged waveguide sections with the ridges of the waveguide sections matched to opposed pairs of the horn ridges. The antenna may be coupled to electronics via standard waveguides. In many embodiments, dimensions of the waveguides coupled to the horn are smaller (to provide a small array spacing) than dimensions of the standard waveguides with a tapered waveguide section providing a transition. In one embodiment, the antenna operates with frequencies from 5.25 to 10.5 GHz.

Abstract: A horn antenna is formed within a multilayer substrate and has a generally trapezoidal shaped top plate and bottom plate formed in different layers of the multilayer substrate. A set of densely spaced vias form two sidewalls of the horn antenna by coupling adjacent edges of the top plate and the bottom plate. The horn antenna has a narrow input end and a wider flare end. A microstrip line is coupled to the top plate and a ground plane element is coupled to the bottom plate at the input end of the horn antenna.

Abstract: An apparatus includes an IC package comprising a substrate having a first metal layer, a second metal layer, and a dielectric layer disposed between the first and second metal layers. The IC package further comprises an IC die disposed at a surface of the substrate and comprising RF circuitry. The first metal layer comprises a microstrip feedline extending from a pin of the IC die. The microstrip feedline includes a conductive trace having a probe element at a tip distal from the pin. The first metal layer further comprises a waveguide opening comprising a region surrounding the probe element, the region being substantially devoid of conductive material. The substrate further comprises a plurality of metal vias disposed at the perimeter of the region, the metal vias extending from the first metal layer to the second metal layer.

Abstract: A broadband double-ridged low profile horn antenna is particularly useful for communications in a mobile wireless network. The broadband antenna of the invention is especially suited for being mounted on the rooftop of a train or vehicle. It is capable of directing electromagnetic energy in a desired direction to provide signal gain. It is capable of conforming to the surface of a vehicle to function aerodynamically. Advantageously, the single broadband double-ridged horn antenna hereof replaces multiple narrowband antennas. This broadband antenna is capable of steering electromagnetic energy in a predetermined direction to provide signal gain toward a pole-mounted communications node located along train tracks, Furthermore, the broadband antenna hereof is made aerodynamic by at least partially conforming it to the exterior rooftop surface of a train or vehicle.

Abstract: The present invention is related to a device for generating waveguide modes for use in a feed horn of a satellite antenna system, said waveguide modes comprising at least one excitation mode of higher order than the fundamental mode, said device comprising a waveguide containing a first waveguide section with at least three longitudinal slots extending in the inner side of said waveguide, characterised in that said waveguide contains a second waveguide section with at least three longitudinal slots extending in said inner side of said waveguide.

Abstract: A radio frequency (RF) coaxial horn can comprise an inner RF horn disposed inside a larger outer RF horn. An interior surface of the inner horn can comprise a pattern of irregular, aperiodic features that excite modes in first and second RF signals each at a different frequencies that produce substantially Gaussian beam profiles of the first and second signals at the output aperture of the inner horn. The waists of the beam profiles of the first and second signals can be outside the inner horn but inside the outer horn. An interior surface of the outer horn and/or an outer surface of the inner horn can similarly excite modes in a third RF signal at a frequency different than the first and second RF signals to produce a substantially Gaussian beam profile of the third signal at the output aperture of the outer horn. The waist of the beam profile of the third signal can be aligned with the waists of the beam profiles of the first and second signals.

Abstract: A broadband antenna element for RF transmission and reception over cellular frequencies. The antenna element is formed of conductive material on a substrate surface of conductive material in the form of a pair of half portions extending in opposite directions to distal tips defining the widest distance of a mouth of a cavity. The mouth converges to reduce in cross-section to a narrowest point at a plurality of different flare angles defined by the edges of the two half portions in between the pair of half portions forming the element. The resulting antenna element radiates and receives a wide band cellular frequencies enabling a single element to serve different providers operating on different frequency bands in the cellular spectrum between 680 MHz to 1900 MHz.

Abstract: The corrugated component for the transmission and manipulation of electromagnetic signals with frequency up to several THz, comprises an assembly of a plurality of plates stacked together in a hollow guiding rod wherein said plates have at least one aperture of alternating diameter to form a slot or a ridge in alternate fashion, wherein the external shape of said plates corresponds to the internal shape of the hollow guiding rod. The invention also concerns a method for assembling such a corrugated component.