Abstract: The present invention is applicable to satellite ground station antennas having a wide field of view in comparison to the satellites with which the antenna connects. One embodiment includes a parabolic reflector having a size that corresponds to a beam with an angular half-width larger than the spacing between neighboring interfering satellites. It also has a feed coupled to the parabolic reflector configured to have a high sensitivity for a target satellite within the angular half-width of the reflector beam and a low sensitivity for neighboring interfering satellites within the angular half-width of the reflector beam. Another embodiment includes projecting a first radiation pattern, such as a digital communications link, between a ground station antenna and a target satellite and projecting a second radiation pattern to a target interferer.

Abstract: An antenna apparatus for the reception of, and or transmission of, electromagnetic energy, the apparatus including a non-radiating dielectric waveguide aperture coupled to at least one dielectric rod antenna, which is electromagnetically coupled to a transmission line element.

Abstract: A feed assembly for a reflector antenna having a unitary portion of dielectric material, a proximal end of the unitary portion configured for connection with the reflector antenna. The unitary portion having a waveguide portion extending between the proximal end and a sub reflector support having a sub reflector surface at a distal end. The waveguide portion and the sub reflector surface covered with an RF reflective material. The unitary portion may be cost effectively formed via, for example injection molding and or machining. Alternatively, the feed assembly may be formed as a horn feed, without a sub reflector.

Abstract: A dielectric antenna is provided which uses a compounded material and exhibits a small change in relative dielectric constant at room temperature against a load due to temperature changes. The dielectric antenna includes a dielectric block, a radiation electrode, a feeding electrode and a fixing electrode provided on the dielectric block. The dielectric block contains a crystalline thermoplastic resin, ceramic powder, and an acid-modified styrenic thermoplastic elastomer. The acid-modified styrenic thermoplastic elastomer content in the dielectric block is 3% to 20% by volume.

Abstract: A plane wave antenna including: a horn antenna; a waveguide at least partially inside the horn antenna, wherein the waveguide includes: a central dielectric slab increasing in width toward the horn antenna and with a first dielectric constant, an upper slab above the central dielectric slab with a second dielectric constant, and a lower slab below the central dielectric slab with the second dielectric constant; wherein the central dielectric slab has a substantially constant thickness less than a quarter of a wavelength at a highest frequency of operation of the plane wave antenna.

Abstract: A dielectric leakage wave antenna in which both transmission characteristics of a dielectric image line for a radiating section and those of a microstrip line for an exciting section are satisfied while enhancing efficiency by such an arrangement as a dielectric substrate has a lower layer portion and an upper layer portion bonded onto the lower layer portion. A ground plate conductor forming the dielectric image line for making an electromagnetic wave propagate through the dielectric substrate direction in a direction intersecting its thickness direction perpendicularly is formed, as one surface side of the dielectric substrate, on the lower surface of the lower layer. A plurality of leakage metal strips provided in parallel at a predetermined interval on the opposite side of the dielectric substrate are formed on the upper surface of the upper layer of the dielectric substrate.

Abstract: A leaky wave antenna contains a first and a second leaky wave antenna structure back to back against each other. Each antenna structure comprises a dielectric body and an elongated wave carrying structure, such as a slot in a conductive ground plane. In each leaky wave antenna structure the body and wave carrying structure are mutually arranged to radiate a leaky wave from the wave carrying structure through the dielectric body, the leaky wave radiating at a respective angle to the wave carrying structure. The dielectric bodies of the first and second wave antenna structure adjoin each other in a common plane that is at said respective angles to the wave carrying structures of the first and second wave antenna structure respectively, so that the ground planes are at an angle with respect to each other. The respective wave carrying structures run over into each other at said common plane, the antenna comprising a feed arranged to excite waves in both the respective wave carrying structures together.

Abstract: A dielectric polyrod having at least one tapered section, where a section exposed outside of the waveguide is tapered a long a curve that depends on the dielectric constant of the material used. The invention also relates to an aperture matched polyrod antenna which includes the same and an inductive tuning element used to achieve wideband impedance match and to create a Gaussian beam in the radiating near field of the antenna, suitable to mimic a small region plane wave.

Abstract: A true-time-delay feed network for a continuous transverse stub antenna array includes a plurality of feed levels, each comprising one or more rails, the feed levels arranged in a spaced configuration. An open parallel plate region is defined between adjacent ones of the feed levels. The rails of the plurality of feed levels are arranged to form a power divider network unencumbered with septums or wall portions protruding into the open region.

Abstract: A radio transceiver device includes circuitry for radiating electromagnetic signals at a very high radio frequency both through space, as well as through wave guides that are formed within a substrate material. In one embodiment, the substrate comprises a dielectric substrate formed within a board, for example, a printed circuit board. In another embodiment of the invention, the wave guide is formed within a die of an integrated circuit radio transceiver. A plurality of transceivers with different functionality is defined. Substrate transceivers are operable to transmit through the wave guides, while local transceivers are operable to produce very short range wireless transmissions through space. A third and final transceiver is a typical wireless transceiver for communication with remote (non-local to the device) transceivers.

Abstract: An antenna comprises a conically shaped body of dielectric material. Cross-sections of the body have truncated elliptical shape, wherein each shape is truncated substantially through a first focus of the elliptical shape along a truncation line that extends substantially perpendicularly to a main axis of the elliptical shape. The second focus of the elliptical shape lies within the body. An elongated wave carrying structure such as a slot in a conductive ground plane extends substantially along a focal line through the first focus of the elliptical shapes in successive cross-sections. This structure supports transmission and/or reception over a wide range of frequencies. In an embodiment a multi-frequency feed structure is integrated in the ground plane of the antenna.

Abstract: An optoelectronic device includes a substrate having a surface, a metallic coupling structure deposited on the surface of the substrate, the metallic coupling structure having a port and a waveguide interface portion with at least two waveguide interface portion sides, and a dielectric waveguide, the dielectric waveguide having a coupling interface portion deposited adjacent the at least two waveguide interface portion sides of the waveguide interface portion of the metallic coupling structure. It is possible to form high speed, CMOS-process-compatible, low power optical-electrical and electrical-optical conversion devices (i.e. optical detectors, modulators, and frequency mixer's) on the top of the semiconductor chip, after the rest of the wiling has been laid down.

Abstract: A dielectric based antenna provides for relatively wide band communications. In this regard, the dielectric based antenna may provide communications across a variety of mobile telephone communication types and frequencies, such as GSM850, EGSM900, DCS1800, PCS1900, and UMTS. In one embodiment, the dielectric based antenna includes a dielectric element and at least first and second antenna elements. The dielectric element may be configured into a volumetric shape from a material with a relatively high permittivity. The first and second antenna elements are respectively wrapped about first and second portions of the dielectric element and may provide for respective first and second frequency bands of the dielectric based antenna. An antenna feed port couples the dielectric based antenna to a communication module via an antenna feed such that radio signals may be transmitted and/or received through the dielectric based antenna.

Abstract: A feedhorn includes a chassis body, a waterproof cover serving as a cover member and a dielectric antenna. The chassis body includes a waveguide having an opening. The waterproof cover is connected to the chassis body to close the opening. The waterproof cover is made of a dielectric. The dielectric antenna is placed to face the opening with the waterproof cover therebetween. Thus, the feedhorn, a radio wave receiving converter and an antenna with which the manufacturing cost can be reduced are achieved.

Abstract: A phased array antenna system on an aircraft that incorporates a choke plate that significantly attenuates sidelobes of the antenna beam pattern at elevation angles that would cause RF interference with ground-based terrestrial wireless networks. The choke plate includes a plurality of choke grooves that substantially circumscribe the antenna aperture. The choke plate has an upper surface that is positioned generally coplanar with the upper surface of the antenna aperture. The grooves of the choke plate may be filled with a dielectric material. The choke plate provides a smooth aerodynamic component that significantly attenuates beam scattering, and thus the radiation pattern sidelobes of the antenna at or below the horizon, when the aircraft is in flight.

Abstract: The invention provides apparatuses for a radial constrained lens in a steerable directional antenna system. The radial constrained lens includes a feed array that excites a continuous radiating aperture through a section of radial waveguide. Feed elements of the feed array are coupled to a feed network that processes a signal for each of the active feed elements. A feed array may include a plurality of feed probes or a plurality of waveguide sections. A sector, which includes a contiguous subset of feed elements, may be configured by a switching arrangement either in a transmit mode or a receive mode. The radial constrained lens may be commutated about a full 360 degree aperture view. Also, a plurality of radial constrained lens may be vertically stacked so that a scanned beam may be adjusted both in an azimuth and elevation directions.

Abstract: A multi-beam lens antenna for individual communication with communication satellites spaced at small elongations. The multi-beam antenna comprises primary feeds 3 each of which is composed of a waveguide having an opening at the end and a dielectric body 6 disposed at the end, a hemispherical Luneberg radio wave lens, and a reflective plate attached to the circular opening of the hemispherical radio wave lens and adapted for reflecting a radio wave incoming from the sky or emitted toward a target. The waveguides are preferably rectangular waveguides 4 rather than circular waveguides 5. The dielectric bodies 6 are preferably tapered.

Abstract: A feedhorn, a radio wave receiving converter, and an antenna that can be reduced in size and have high reliability can be obtained. A feedhorn portion constitutes part of a converter, and includes a chassis body with a waveguide having an opening, a dielectric as a dielectric member connected to the opening, and a waterproof cover as a protective member. The waterproof cover covers the dielectric and contacts (tightly attached) to a portion of the surface of the dielectric (in the dielectric, the portion of the surface away from waveguide). The waterproof cover is formed of a material having substantially the same electric characteristics (permittivity and dielectric loss tangent) as the material forming the dielectric.

Abstract: A hexagonal array structure of a dielectric rod for shaping a flat-topped element pattern (FTEP) is provided. The hexagonal structure of dielectric rods forming a flat-topped element pattern (FTEP) includes: a center element for forming a unit radiation pattern of the FTEP through an electromagnetic wave mutual coupling by receiving a polarization signal of a basic mode; a plurality of first ring elements arranged at vertexes of a regular hexagon based on the center element for forming the unit radiation pattern by electromagnetic wave mutual coupling with the center element and an electromagnetic wave; and a circular waveguide array supporting unit for supporting the center element and the plurality of first ring elements.

Abstract: A dielectric antenna of the present invention includes a pillar-shaped dielectric section for radiating an electromagnetic wave being fed thereto. The dielectric section includes a depressed portion in an upper portion thereof. The vertical cross section of the depressed portion has such a shape that the height of the dielectric section gradually increases toward the side surface of the dielectric section. For example, the depressed portion is a notch having a V-shaped vertical cross section. Alternatively, the depressed portion includes a flat surface portion.

Abstract: A reconfigurable directional antenna for transmission and reception of electromagnetic radiation includes a transmission line aligned with and adjacent to a metal antenna element with an evanescent coupling edge having a selectively variable electromagnetic coupling geometry. The shape and direction of the beam are determined by the selected coupling geometry of the coupling edge, as determined by the pattern of electrical connections selected for physical edge features of the coupling edge. The electrical connections between the edge features are selected by the selective actuation of an array of “on-off” switches that close and open electrical connections between individual edge features. The selection of the “on” or “off” state of the individual switches thus changes the electromagnetic geometry of the coupling edge, and, therefore the direction and shape of the transmitted or received beam. The actuation of the switches may be accomplished under the control of an appropriately-programmed computer.

Abstract: An array of dielectric wave antennas is disclosed. Each wave antenna has a central dielectric portion and two dielectric tapered portions, disposed on opposite sides of the central dielectric portion. The array is deployed in a lens shape and allows variation of the phase delay of an incident electromagnetic wave when passing through the array.

Abstract: An antenna, which may be used as an element in an array, includes an elongated curved dielectric member having a high dielectric constant. One end of the dielectric member is in physical contact with the “center” conductor of an unbalanced transmission line, and projects above a ground plane. The dielectric member is roughly vertical at the feed point and horizontal at the distal end. The dielectric constant is greater than 10, preferably greater than about 80, and most preferably 120 or more.

Abstract: A feedhorn, a radio wave receiving converter, and an antenna that can be reduced in size and have high reliability can be obtained. A feedhorn portion constitutes part of a converter, and includes a chassis body with a waveguide having an opening, a dielectric as a dielectric member connected to the opening, and a waterproof cover as a protective member. The waterproof cover covers the dielectric and contacts (tightly attached) to a portion of the surface of the dielectric (in the dielectric, the portion of the surface away from waveguide). The waterproof cover is formed of a material having substantially the same electric characteristics (permittivity and dielectric loss tangent) as the material forming the dielectric.

Abstract: A process control instrument comprises a control for generating or receiving a high frequency signal. A waveguide comprises a cylindrical housing closed at one end by a rear wall. A loop launcher is operatively connected to the control and comprises a wire having a first straight leg electrically connected at one end to the control and extending into the waveguide a first select length. A second straight leg is connected at one end to the rear wall and extends into the waveguide a second select length, greater than the first select length. A curved middle section connects the other ends of the first and second straight legs. An antenna is operatively coupled to the waveguide.

Abstract: An antenna apparatus in which a combination of rectangular waveguides 9a and 10a and a combination of rectangular waveguides 9b and 10b are disposed bilateral symmetrically to each other, and a waveguide orthomode transducer 13 is disposed above a waveguide orthomode transducer 8 is provided. Therefore, the profile of the antenna apparatus can be reduced and the stability of installation of the antenna apparatus can be improved without impairing the electric characteristics of the antenna apparatus. Since the antenna apparatus has a bilateral symmetric structure, it excels in weight balance and offers stable performance from the viewpoint of mechanism.

Abstract: The invention provides apparatuses for a radial constrained lens in a steerable directional antenna system. The radial constrained lens includes a feed array that excites a continuous radiating aperture through a section of radial waveguide. Feed elements of the feed array are coupled to a feed network that processes a signal for each of the active feed elements. A feed array may include a plurality of feed probes or a plurality of waveguide sections. A sector, which includes a contiguous subset of feed elements, may be configured by a switching arrangement either in a transmit mode or a receive mode. The radial constrained lens may be commutated about a full 360 degree aperture view. Also, a plurality of radial constrained lens may be vertically stacked so that a scanned beam may be adjusted both in an azimuth and elevation directions.

Abstract: An element card for an ultra-wideband array antenna is disclosed. The element card has one or more integrated antennas and can be designed to operate over multiple decades of bandwidth. The element card may be arranged as part of an array of element cards to achieve operation in multiple frequency bands.

Abstract: An electrically small wideband circularly polarized single layer compact microstrip antenna that permits a substantial reduction in antenna size is provided, by stacking a semicircular radiating arch on a dielectric substrate and a conductive ground plane that permits both a considerably reduced antenna length and significantly high efficiency antenna performance. The radiating arch is composed from a group of arc-shaped segments that are each separated by a gap, with one segment having an opening allowing a connector center probe to protrude upwards. In the preferred embodiment, the arc-shaped segments are arranged into a semicircle on the top surface of the dielectric substrate. Other embodiments include an array antenna and a method for decreasing a wideband circularly polarized compact microstrip antenna with a given length, AL.

Abstract: An antenna feed comprises, aligned and centered on an axis OO?, a waveguide having an inside diameter, a first end and a second end, a dielectric body having a portion inside the waveguide and a portion outside the waveguide, the outside portion comprising a section of frustoconical shape having an outside lateral surface of frustoconical shape with two ends, namely a large diameter end and a small diameter end, and a subreflector at the large diameter end of the frustoconical shape. The outside portion comprises, in addition to the frustoconical portion, a cylindrical portion whose diameter is greater than the inside diameter of the waveguide. The cylindrical portion is connected to the frustoconical portion at its small diameter end and the frustoconical outside lateral surface of the dielectric body is smooth.

Abstract: It is an object of the invention to provide a dielectric ceramic composition which enables its firing temperature to be lowered and which has an excellent electrical properties, particularly temperature dependence of resonance frequencies. A dielectric ceramic composition according to the invention comprises an oxide of a barium titanate family having a composition formula represented as BaTixO2x+1 (3.5?x?5.0); a first chemical element group consisting of at least one kind of alkaline-earth metals, silicon, zinc, aluminium, titanium, copper, bismuth and molybdenum; and a second chemical element group consisting of at least one kind of alkali metals and boron. A weight ratio of a total of each chemical element in the first and second chemical element groups to the oxide (the total of each chemical element/the oxide) is between 45/55 and 65/35 inclusive when the ratio is determined by converting said each chemical element to its oxide.

Abstract: A travelling waveguide antenna has top and bottom spaced plates, the top plate having radiating apertures extending therethrough. The apertures have inclined surfaces facing one another to provide an outward flare of the apertures.

Abstract: An arrangement for feeding a centrally focused reflector antenna includes a waveguide (1), a dielectric field transformer (2) arranged on the waveguide (1) and a mounting platform (3) for a series of modules (8) which is embodied on one end of the waveguide (1). The waveguide (1) is provided with an arrangement for receiving the dielectric field transformer (2) which partially protrudes into the waveguide (1). Preferably, a dielectric support (9) may be provided in the vicinity of the dielectric field transformer (2). The middle of the support has a circular bore (12) whose diameter corresponds to the diameter of the dielectric field transformer (2). The centrally focused reflector antenna can be excited in the focal point thereof in a field-optimum broadband manner.

Abstract: A system and method for prescribing an amplitude distribution to a leaky-wave microstrip antenna having an array of radiating cells. The leaky-wave microstrip antenna includes a grounded element, a dielectric member coupled to the grounded element and a top conducting strip coupled to the dielectric member, the conducting strip including a first and second non-radiating conducting strip and a plurality of radiating cells. This distribution requires that the microstrip antenna possess a variable leakage-constant profile along its length, and is chosen so as to yield an H-plane power-gain pattern having low sidelobes. The leakage-constant profile is achieved by configuring the width and inter-cell spacing of the antenna radiating cells and keeping the phase constant fixed. The length or loading of the radiating cells may also be manipulated to achieve the desired leakage constant profile. This results in the desired distribution along the antenna's aperture and yields a power-gain pattern with low sidelobes.

Abstract: A system and method for prescribing an amplitude distribution to a leaky-wave microstrip antenna having an array of radiating cells. The leaky-wave microstrip antenna includes a grounded element, a dielectric member coupled to the grounded element and a top conducting strip coupled to the dielectric member, the conducting strip including a first and second non-radiating conducting strip and a plurality of radiating cells. This distribution requires that the microstrip antenna possess a variable leakage-constant profile along its length, and is chosen so as to yield an H-plane power-gain pattern having low sidelobes. The leakage-constant profile is achieved by configuring the width and inter-cell spacing of the antenna radiating cells and keeping the phase constant fixed. The length or loading of the radiating cells may also be manipulated to achieve the desired leakage constant profile. This results in the desired distribution along the antenna's aperture and yields a power-gain pattern with low sidelobes.

Abstract: A marine radar antenna has a single dielectric plate mounted in front of the waveguide polarization grid between two horn plates. A strip of dielectric material is secured to the upper and lower surfaces of the plate to form a forwardly and rearwardly facing step on each surface. The steps are located forwardly of the ends of the horn plates and are positioned to produce reflections substantially 180° out of phase with extraneous energy within the antenna. The dielectric plate is supported by a foamed plastics material within an outer radome.

Abstract: Antenna systems (200, 1300, 1500, 1900, 2000, 2400) comprise a dielectric resonator antenna (210) in the shape of a parallelepiped with right angle corners. The thickness (T) of the dielectric resonator antenna (210) is chosen to be less than the length and height. The antenna systems (200, 1300, 1500, 1900, 2000, 2400) provide have broad band response that is attributed to two or more resonant modes that have center frequencies that are closely spaced in frequency relative to their bandwidths. Additional pass bands can be obtained by placing a conductive strip (1302) along an edge of the dielectric resonator 210. The passband associated with the conductive strip (1302) can be lowered in frequency by capacitively loading the conductive strip (1302). An additional passband can also be obtained by coupling a metal ribbon (2012) to a feed in microstrip (206, 2002) and to the dielectric resonator antenna (210).

Abstract: A microwave dielectric ceramic composition comprises a composition of the formula xMO-yLa2O3-zTiO2 wherein M is selected from Sr and Ca and x:y:z=1:2:4, 2:2:5, 1:2:5, 1:4:9.

Abstract: In a satellite broadcast reception converter, probes are equipped in a circular hole formed in a first circuit board, and plural fixing holes are formed around the circular hole. Snap pawls are formed at open ends of the waveguides formed of sheet metal. The respective snap pawls are inserted in the fixing holes of the first circuit board so as to project to the back surface side of the first circuit board, and the fixing holes of the short caps are snapped into the snap pawls. A dielectric feeder of synthetic resin supported on each waveguide has a first split body with radiation portion projected from the open end of each waveguide and a second split body having a phase converter fixed in the waveguide. The first and second split bodies are unified by inserting a projection equipped to the second split body into a through hole formed at the center of the first split body.

Abstract: An improved millimeter wavelength antenna assembly having an input signal coupler, a dielectric waveguide, and a rotatable drum is disclosed. The input signal coupler reduces VSWR return losses and scattered radiation losses from the drum and matches a feeding waveguides characteristics to the dielectric waveguide. Embodiments of the invention include a reflector and a cylindrical lens to direct and form electromagnetic energy radiated by the antenna assembly.

Abstract: A phased array antenna(10) includes a current sheet array (20) on a substrate (23), at least one dielectric layer (24) between the current sheet array and a ground plane (30), and at least one conductive plane (25) adjacent to the substrate for providing additional coupling between adjacent dipole antenna elements of the current sheet array.

Abstract: A family of FE dielectric-tuned antennas and a method for frequency tuning a wireless communications antenna are provided. The method comprises: forming a radiator; forming a dielectric with ferroelectric material proximate to the radiator; applying a voltage to the ferroelectric material; in response to applying the voltage, generating a dielectric constant; and, in response to the dielectric constant, communicating electromagnetic fields at a resonant frequency. Some aspects of the method further comprise: varying the applied voltage; and, modifying the resonant frequency in response to changes in the applied voltage. Modifying the resonant frequency includes forming an antenna with a variable operating frequency responsive to the applied voltage. Alternately stated, forming an antenna with a variable operating frequency includes forming an antenna with a predetermined fixed characteristic impedance, independent of the resonant frequency.

Abstract: A process control instrument comprises a control for generating or receiving a high frequency signal. A waveguide comprises a cylindrical housing closed at one end by a rear wall. A loop launcher is operatively connected to the control and comprises a wire having a first straight leg electrically connected at one end to the control and extending into the waveguide a first select length. A second straight leg is connected at one end to the rear wall and extends into the waveguide a second select length, greater than the first select length. A curved middle section connects the other ends of the first and second straight legs. An antenna is operatively coupled to the waveguide.

Abstract: A primary radiator including a waveguide formed by winding a metallic plate into a cylindrical shape and superimposing both ends thereof at a joining portion. Two first flat portions and two second flat portions, extending in the direction of the central axis of the waveguide, are formed so that a first flat portion and a second flat portion alternate at intervals of substantially 90 degrees, thereby forming a total of four flat portions. A dielectric feeder includes a radiator section, an impedance converting section, and a phase converting section.

Abstract: Each of a first minute radiation pattern and a second minute radiation pattern is provided on a first circuit board so as to be inclined electrically by about 45° from the respective axial lines of a first probe for vertically polarized waves and a second probe for horizontally polarized waves. The first minute radiation pattern is approximately perpendicular to a phase conversion portion of a first dielectric feeder, and the second minute radiation pattern is approximately parallel with a phase conversion portion of a second dielectric feeder. The phase conversion portion of the first dielectric feeder is longer than that of the second dielectric feeder.

Abstract: A dual band, higher and lower frequency range transducer with a circular coaxial waveguide feed is described having a first junction for connection of a lower frequency range outer waveguide of the coaxial waveguide feed to at least two rectangular or ridge waveguides offset from the longitudinal axis of the transducer and a second junction for connection of the at least two rectangular or ridge waveguides to a further waveguide. A third junction is provided for connecting an inner waveguide of the coaxial waveguide feed to a higher frequency range waveguide. The transducer comprises at least first and second parts joined across a first plane substantially perpendicular to the longitudinal axis and including at least a portion of the higher frequency range waveguide extending within the first plane of the join. A seal such as an “O” ring seal may be placed easily in the plane of the join thus preventing moisture ingress.

Abstract: A dielectric fill disposed in a waveguide is used to form an antenna feed. One attribute of the dielectric fill is to enable a reduction in aperture size that in turn increases the beamwidth. More specifically, an RF signal received or transmitted at the end of the waveguide can have a wider half-power beamwidth angle than otherwise achieved without the dielectric filling the waveguide. A portion of the dielectric fill may protrude beyond the end of the waveguide to match the waveguide to free space. If the waveguide section is cylindrical in cross-section, a transformed section formed of an annular dielectric ring may be used to match the feed to a rectangular waveguide.

Abstract: A dielectric ceramic containing Bi, Zn, and Sr as constituent elements. A resin-ceramic composite material containing a mixture of the dielectric ceramic powder and an organic polymer resin. An antenna and an electrical part using the composite material, and a manufacturing method thereof.

Abstract: A multibeam radar sensor is proposed in which a holder (of resilient construction) for polyrods, in connection with a spacing element, holds the polyrods fixedly at a predetermined spacing, preferably in the range between 0 mm and 0.2 mm. The stays of the holder are fashioned such that a spring force constantly presses the spacing element against the base plate. In this context, the spring force is chosen such that the maintenance of the predetermined spacing a is ensured even under disadvantageous operating conditions such as vibration, shock, and impact.

Abstract: The invention relates to a horn antenna for a radar-filling level measuring device having an antenna envelope (3) that comprises a flaring hollow space (4) of the antenna, in which a filling (10) is present at least in part filling up said hollow space (4) of the antenna, and having an encasing (10, 20) of a dielectric material and enclosing the outside of the antenna envelope (3) and closing the opening (3a) of the hollow space of the hollow space (4) of the antenna.