Abstract: A housing apparatus is described which comprises a hollow conductor which is adapted for guiding an electromagnetic wave having a predeterminable wavelength and which comprises an edge surface which extends substantially perpendicularly to the propagation direction of an electromagnetic wave guided by the hollow conductor, wherein the housing apparatus comprises both a wall element and a protection apparatus having a bearing surface. The wall element holds the protection apparatus on an end of the hollow conductor by means of a pressing force.

Abstract: A housing apparatus is described which comprises a hollow conductor which is adapted for guiding an electromagnetic wave having a predeterminable wavelength and which comprises an edge surface which extends substantially perpendicularly to the propagation direction of an electromagnetic wave guided by the hollow conductor, wherein the housing apparatus comprises both a wall element and a protection apparatus having a bearing surface. The wall element holds the protection apparatus on an end of the hollow conductor by means of a pressing force.

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: A radome for a feed horn includes a cover and at least a protrusion having an elliptic protruding portion shaped as a part of a hollow ellipsoid and provided with a convex surface and a concave surface opposite to the convex surface. The radome is defined with a plurality of first and second cross-sections. Curves of the convex and the concave surfaces in the first cross-sections are different from those in the second cross-sections. The convex and concave surfaces are substantially perpendicular to an advancing direction of a co-polarization wave and unperpendicular to an advancing direction of a cross polarization wave. As a result, the radome can be so thick as to be easily manufactured and not easily damaged and enhance the performance of the feed horn covered by the radome in sending and receiving signals.

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: An antenna for use with electromagnetic waves includes a waveguide body having an open end and first threads and a cap having second threads which interface with the first threads to press the cap against the open end. The cap includes a cover which covers the open end when the cap is screwed onto the open end using the first and second threads while allowing the electromagnetic waves to pass through the cover. The antenna can be a horn antenna, and can also be a feedhorn antenna used with a reflector in a reflector antenna.

Abstract: An assembly includes a self-contained, adjustable shrouding for a MIMO or SISO, or combination thereof, retransmission system enclosure. The enclosure ensures proper coverage areas of small to large facilities. The proper coverage is achieved through cake layer pie designs that previously often resulted in capacity and sector overlay issues. The antenna enclosure has a directional nature that allows for dividing stadiums, arenas, tracks, (or other large groups) into manageable smaller coverage areas through controlled directional zoning.

Abstract: The disclosure provides an antenna device, which includes a waveguide antenna having wall surfaces and for emitting a radio wave in a direction substantially perpendicular to an emission face that is one of wall surfaces of the waveguide antenna extending in an elongated direction of the waveguide antenna, a plate-shape two-dimensional opening slots for beam formation formed in the waveguide antenna on the emission face side, a power feed waveguide module arranged in the rear face of the waveguide antenna opposite from the emission face and for supplying electric power to the waveguide antenna, and a cylindrical radome having a substantially circular cross-section of a diameter that is substantially equal to a length of the emission face in a direction perpendicular to the long-side direction so that the waveguide antenna is contained in the radome so as to be arranged at substantially the center of the radome.

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: An antenna is provided for use with a vehicle that includes a body that is encased by a thermal protection system (TPS). An opening extends through the TPS and the vehicle body, and an antenna assembly and a seal member are positioned within the opening. The seal member extends about the antenna assembly and is radio frequency (RF) opaque. A window extends across the opening to retain the antenna assembly and seal member within the opening. The window is RF transparent.

Abstract: According to one embodiment, an antenna device includes a leaky coaxial cable, an electrical device and a cover. The cover which is formed with a slender internal space having a first and second ends in the length direction and a first and second vent holes that respectively connect the internal space with the outside at each of the neighbourhood of the first and second ends, and houses the leaky coaxial cable and the electrical devices in the internal space.

Abstract: An antenna element and a phased array antenna including a plurality of such antenna elements are described. The antenna element includes a waveguide configured for operating in a below-cutoff mode and having a cavity, an exciter configured for exciting the waveguide, and a shield. The shield includes a holder arranged within the cavity, and a front plate mounted on the holder and disposed over at least a part of the exciter.

Abstract: Microwave antenna for a level indicator, with an antenna cavity having a radiating aperture which can be closed with an HF-permeable disk that is fixed in position within the antenna cavity by means of a snap ring, and at least one sealing component is provided to seal the transitional area between the disk and the microwave antenna.

Abstract: A low noise block converter feedhorn (LNBF) is disclosed. The LNBF comprises a PCB, a dielectric resonator oscillator (DRO), a chamber, a tuning screw, and a cover. The DRO is placed on the PCB. The chamber has a first partition, and the first partition is used to cover up the DRO. The chamber further comprises a round hole. The tuning screw passes through the round hole and is then used to adjust the oscillating frequency of the DRO. The cover is used to cover up the tuning screw in order to restrain the DRO from power leakage through the gap in between the round hole and the tuning screw.

Abstract: The disclosure provides an antenna device, which includes a waveguide antenna having wall surfaces and for emitting a radio wave in a direction substantially perpendicular to an emission face that is one of wall surfaces of the waveguide antenna extending in an elongated direction of the waveguide antenna, a plate-shape two-dimensional opening slots for beam formation formed in the waveguide antenna on the emission face side, a power feed waveguide module arranged in the rear face of the waveguide antenna opposite from the emission face and for supplying electric power to the waveguide antenna, and a cylindrical radome having a substantially circular cross-section of a diameter that is substantially equal to a length of the emission face in a direction perpendicular to the long-side direction so that the waveguide antenna is contained in the radome so as to be arranged at substantially the center of the radome.

Abstract: A conical radiator coupled to an antenna patch disposed along a first end of the radiator, said patch disposed on an insulator. A ground plane is connected to the insulator and a radome is disposed opposite a second end of the radiator. The radome has a first region presenting a convex surface towards the radiator, and the radome has a second region presenting a concave surface towards the radiator. The first end of the conical radiator is the apex of the cone. A ground plane is included and a portion of the ground plane is a planar surface and another portion extends away from the planar portion towards the radome. Also disclosed is a method for forming a radiation pattern by shaping the radome to effectuate a predetermined radiation pattern using localized convex and concave surfaces positioned on the radome at different points in relation to the conical radiator.

Abstract: Microwave antenna for a level indicator, with an antenna cavity having a radiating aperture which can be closed with an HF-permeable disk that is fixed in position within the antenna cavity by means of a snap ring, and at least one sealing component is provided to seal the transitional area between the disk and the microwave antenna.

Abstract: An antenna aperture for mounting on the outside mast structure of a submarine is disclosed. The antenna aperture is designed to withstand hydrostatic pressure cycles as would be experienced by a submarine. The antenna is constructed of a highly corrosion resistant housing upon which a wide angle impedance (WAIM) cover designed to meet antenna RF requirements is integrated.

Abstract: A feed window for a feed assembly having at least one primary feed operating at a primary frequency band and at least one secondary feed operating at a secondary frequency band. The feed window sealing against the feed assembly, enclosing an open end of the feeds. A feed window surface of the feed window supported by and spaced away from the feed assembly by a feed window wall. The feed window surface of the feed window generally parallel to a launch edge of the feeds. The feed window may include an insert positioned between the feed window surface and the feeds. An insert aperture may be applied to the insert, corresponding to a feed view window of one of the feeds.

Abstract: An antenna system is disclosed that includes a mast, waveguides positioned about the mast, and a feed system positioned external to the mast and between adjacent waveguides, such the feed system can be easily serviced. The waveguides include spherical radiator elements that are easy to manufacture, and thus reduce the cost associated with wideband cavity-backed antennas.

Abstract: In an independent basic service set (IBSS) of IEDs, using wireless communications devices to provide license-free two-way wireless peer to peer communications of digital data between pairs of IEDs, and also to provide wireless peer to peer communications between ones of said IEDs and a common access port to the IBSS.

Abstract: The present invention relates to an antenna system for a level measuring device for emitting microwaves by means of an antenna horn (2), at the front side of the smaller funnel aperture thereof, HF energy in the form of microwave signals is directly axially coupled by means of planar structures having one patch or several patches (4).

Abstract: A low profile, receiving and/or transmitting antenna is adapted to be mounted onto an interior portion of a building or other structure to receive or transmit radiation through a first dielectric material, such as a window, associated with the building or other structure. The antenna includes a receiving/transmitting horn filled with a second dielectric material and a surface for mounting the antenna to the first dielectric material so that the horn is disposed at a particular angle with respect to a surface of the first dielectric material. A matching layer may be disposed between the first dielectric material and the second dielectric material to provide for a reflectionless match between the first and second dielectric materials.

Abstract: A leakage dielectric waveguide includes a housing made of plane-shaped electrical conductors located parallel to each other, and a dielectric strip for propagating a high-frequency wave between the parallel electrical conductors, wherein the dielectric strip is provided within the housing. The housing is arranged to be asymmetrical, thereby leaking and radiating a high-frequency wave propagating through the dielectric strip. The housing is preferably further composed of the plane-shaped parallel electrical conductors and a side wall. A plane antenna includes the above-mentioned leakage dielectric waveguide, and a projecting device for projecting the high-frequency wave toward a free space in response to a high-frequency wave being projected from the dielectric waveguide.

Abstract: Directed millimeter wave radiation from internal elements of a microwave circuit through the housing cover, housing base, and side walls of a hermetically-sealed MMIC integrated subsystem assembly uses a waffle-wall array of conductive posts as a band rejection filter to provide walls which guide the radiated waves through a hermetically sealed window in the housing base for waveguide propagation or to a dielectric side wall or cover to radiate energy therethrough. For a waveguide launch, the launch probe is printed on a TEM mode microstrip transmission line substrate and is located over or on a dielectric window formed at the end of an air filled waveguide. A waveguide-like mode of propagation is launched perpendicular to the microstrip substrate and the energy is transmitted through the dielectric window into the air dielectric waveguide which extends through the housing base.

Abstract: A radome includes a radome member formed of a dielectric to protect an antenna element from outside space and a structural member formed of metal for supporting the antenna element at the center thereof and to which the radome member is joined at the periphery of the antenna element to support the radome member. When the radome member is formed of dielectric and the structural member is formed of metal, the junction therebetween serves as a kind of antenna and the radiation characteristic of the ordinary antenna element is disturbed. To solve this problem, a portion of the radome member through which an electric wave is transmitted is formed of material through which an electromagnetic wave having a frequency identical with that of the electric wave is transmitted and a junction formed between the radome member and the structural member has a structure for absorbing the electric wave.

Abstract: A low-cost, essentially self-contained microwave earth station having a reflector dish together with the microwave sensing/emitting elements embedded in a rigid, low density and low thermal conductivity plastic foam. At least the sides and back of the unit may be encased in a fiberglass-resin shell. Shielding for terrestrial interference also may be present. For a receive-only station, a low noise amplifier together with frequency conversion and channel selection (or all-channel transmission) to circuits may also be embedded in the foam. The only connections to such a receive-only unit are a line from a d-c source of power for supplying the required operating voltages to the electronics, and a coaxial cable supplying the selected one of the received information signals to the TV display or other device utilizing those signals. Preferably, a single coaxial line with the dual function of information output and d-c power input is employed.

Abstract: A dual band, phased array antenna especially adaptable for tactical radar capable of performing search, track and identification in a hostile jamming environment. The dual band array antenna is essentially two antennas sharing a common antenna aperture. The two antennas possess separate feed system and beam steering control. Thus, the beams for each frequency band can be steered independently and simultaneously. This design utilizes an ultra-wide band radiating element which can operate over approximately an octave bandwidth encompassing two adjacent microwave bands. In particular, the dual band signals can be received efficiently by the radiating element. A dual band coaxial-to-waveguide transition can be used to carry the signals to a diplexer. The dual band signals are separated at the diplexer and can be processed in separate feed networks.

Abstract: A horn-reflector microwave antenna comprises the combination of a paraboloidal reflector for transmitting and receiving microwave signals; a tapered feed horn extending downwardly from the reflector for guiding microwave signals to and from the reflector; a waveguide connected to the lower end of the feed horn; and a dielectric membrane extending across the interior of the feed horn for collecting any debris that falls down into the feed horn. In the preferred embodiment of the invention, the outer periphery of the dielectric membrane is secured to the interior walls of the feed horn, and the central portion of the membrane is elevated above the periphery thereof so that debris collected on the membrane slides to the walls of the feed horn.

Abstract: The present invention relates to a method for reducing the weather cover-induced reflection sidelobes associated with horn reflector antenna arrangements. More particularly, the present invention consists of attaching the weather cover (26) to curved forms (21,23) placed in the antenna aperture, where the forms are shaped to contour the weather cover into a cylindrical paraboloid form, this form being capable of focusing the reflections from the weather cover onto a line inside the antenna arrangement. By covering this line inside the antenna with microwave absorbing material, (36) the focused weather cover reflections may be absorbed, thereby significantly reducing the sidelobes caused by the presence of the weather cover.

Abstract: A device for reducing the backlobe radiation from small aperture antennas is shown to comprise a thin hemispherical radome having both radio frequency energy absorbing and reflecting materials attached thereto. The absoring material dissipates a portion of the edge currents existing on the antenna aperture, while the reflecting material intercepts a portion of the energy radiated from the antenna and reflects that portion back to the edge of the antenna to produce destructive interference with the edge currents.

Abstract: A broadband (8-18 GHz) radomed horn antenna system comprises a conical horn having broadband slots on the inner surface and a radome having a frusto-conical side wall and a spherically shaped transverse wall inserted into the horn. The radome wall is thin relative to operating wavelength. The radome side wall fits snugly against the inner surface of the horn wall so that transverse wall is proximate to the horn feed port with its convex side facing toward the horn aperture. The cylindrical feed guide contains a higher order hybrid mode suppressor which maintains a substantially uniform radiation pattern over the operating band with an acceptable insertion loss.

Abstract: An improved antenna system of the type including a parabolic antenna with offset exciting in which only the upper portion of the parabola is used, an approximately horizontal bottom plate, and an exciter which is disposed above the bottom plate. The exciter has a tilt angle of about 50.degree.. The paraboloidal reflector is covered by a dielectric cover plate which is inclined to the vertical so that the cover plate and parabola contact in a single plane, and a portion of both sides of the width of the parabola is removed, and side sheets are provided to connect the paraboloidal bowl and the cover plate. The exciter is a conical multimode exciter with an aperture angle of about 100.degree. and is provided with at least one and preferably a plurality of concentrically arranged slits on the conical surface of the exciter facing the paraboloidal reflector with the depth of the slits decreasing in a direction toward the edge of the cone adjacent the reflector. The width of the slits is between .lambda./10 and .

Abstract: A waveguide launcher apparatus for coupling a coaxial transmission line to a waveguide array antenna element. The waveguide launcher apparatus utilizes its short depth to achieve the desired match between the coaxial connector and free space. The launcher apparatus has an L shape which performs as a matching element and as an adaptor between the coax transmission line and wave guide sections.