Abstract: A feed structure (105) for a horn antenna (100). The feed structure can include a first waveguide (110) and a second waveguide (115) having a first portion at least partially disposed within the first waveguide. The second waveguide also can include a second portion intersecting a first wall (240) of the first waveguide. The first wall can include a first frequency selective surface (244) at an intersection (280) of the first wall and the second portion of the second waveguide. The first waveguide can be operatively coupled to a first horn section (130) and the second portion can be operatively coupled to a second horn section (135).

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: A phased array antenna includes a plurality of radiating elements, a feed line assembly, a ground plane positioned between the plurality of radiating elements and the feed line assembly, with the ground plane having a plurality of openings positioned between the plurality of radiating elements and the feed line assembly, and a plurality of voltage tunable dielectric phase shifters coupled to the feed line assembly.

Abstract: This invention relates to a waveguide slot antenna and a method of manufacturing. More particularly, the invention relates to a waveguide slot antenna designed in a multi-layer structure in the form of waveguide slot with the characteristics of a sharp directivity and high gain. Also, the invention relates to an antenna manufacturing method that provides a conductive characteristic to dielectric synthetic resin by thinly coating the synthetic resin with a conductive metal after injection molding.

Abstract: An antenna array employing continuous transverse stubs as radiating elements is disclosed. In an exemplary embodiment, the array includes an upper conductive plate structure comprising a set of continuous transverse stubs, and a lower conductive plate structure disposed in a spaced relationship relative to the upper plate structure. A rotation apparatus provides rotation between the upper plate structure and the lower plate structure.

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: A unit element of a periodically loaded edge slot array includes a reduced-height waveguide section having top and bottom walls and opposed first and second sidewalls defining a waveguide space. A slot is formed in the first side wall at an angle with respect to a waveguide longitudinal axis. At least one conductive post protrudes from the top wall into the waveguide space. The unit element can be incorporated into sticks of an electronically scanned antenna.

Abstract: An antenna element (20) comprising a first conductive plane (22), a second conductive plane (24), and one or more dielectric layers (26, 28, 30) separating the first and second conductive planes (22 and 24). A resonant cavity (48) is formed by a portion of the first conductive plane (22), a portion of the second conductive plane (24) and electrical connections (e.g., plated vias(40)) extending therebetween. A slot (32) is formed in the portion of the second conductive plane (24) forming one side of the resonant cavity (48) and the feedline (34) extends into the cavity (48).

Abstract: A slot array antenna, comprising: a power feeding waveguide for feeding microwave power; and a plurality of rectangular radiating waveguides connected to a plurality of windows which are disposed along the longitudinal direction of the power feeding waveguide, so as to guide the microwave power from the plurality of windows to the outside of the antenna. In each of the radiating waveguides, the interval “d” between the centers of gravity of slot pairs or slots is substantially the same as the wavelength &lgr;m of the microwave in the rectangular radiating waveguide.

Abstract: A waveguide portion has a waveguide with a rectangular section surrounded by a pair of narrow side plates opposed to each other, a pair of broad side plates extending along lengthwise directions of the pair of narrow side plates. A radiation portion is provided on one broad side plate of the pair of broad side plates of the waveguide portion, and has a plurality of slots for radiating an electromagnetic wave input into the waveguide portion externally from the one broad side plate. The waveguide portion includes a first waveguide member and a second waveguide member, and is constituted by joining the first waveguide member and the second waveguide member at edge portions extending in longitudinal directions thereof matching with central lines of the pair of broad side plates. The plurality of slots of the radiation portion has a first group of slots and a second group of slots defined respectively in the first waveguide portion and the second waveguide portion at predetermined intervals in a staggered manner.

Abstract: A dual-polarization common aperture antenna having fully populated common aperture dual polarized arrays. The inventive antenna includes a first and second arrays of radiating slots disposed in a faceplate. The second array is generally orthogonal and therefor cross-polarized relative to the first array. The first array is waveguide fed and the second array is stripline fed. In the illustrative implementation, the first array and the second array share a common aperture. The common aperture is fully populated and each array uses the aperture in its entirety. The first and second arrays of slots are arranged for four-way symmetry. Each slot in the first array is a vertically oriented, iris-excited shunt slot fed by a rectangular waveguide and centered on a broad wall thereof. The second array is a standing wave array in which each slot is an air cavity backed slot fed by an inverted micro-stripline offset from a center thereof.

Abstract: This invention relates to a waveguide slot antenna and a method of manufacturing. More particularly, the invention relates to a waveguide slot antenna designed in a multi-layer structure in the form of waveguide slot with the characteristics of a sharp directivity and high gain. Also, the invention relates to an antenna manufacturing method that provides a conductive characteristic to dielectric synthetic resin by thinly coating the synthetic resin with a conductive metal after injection molding.

Abstract: The invention relates to a distribution network for electromagnetic signals, preferably for use in an antenna arrangement in the microwave range, comprising at least two waveguide branches, in which branches the electromagnetic signals propagate in different directions in relation to one another. The invention is characterized in that the at least two waveguide branches overlap one another at one point in the distribution network. The waveguide branches in the distribution network which overlap one another are preferably neighboring branches and have at lease one aperture in the part of the branch which overlaps the other branch.

Abstract: A beam scanning plane antenna is formed by stacking, in order, a system connecting portion, a Rotman lens portion, and a beam scanning antenna portion. The system connecting portion is formed by stacking, in order, a fourth grounding conductor, a sixth dielectric, a connecting substrate and a fifth dielectric. The Rotman lens portion is formed by stacking, in order, a third grounding conductor, a fourth dielectric, a Rotman lens substrate and a third dielectric. The beam scanning antenna portion is formed by stacking, in order, a second grounding conductor, a second dielectric, a power feeding substrate, a first dielectric and a first grounding conductor. A plurality of antenna groups that each include an irradiating element, a power feeding line and a first connecting portion, are formed on the power feeding substrate. The Rotman lens substrate includes a Rotman lens pattern, a second connecting portion and a third connecting portion.

Abstract: A slot array antenna comprises a slot array antenna main body (111) and a dielectric cover (116). The slot array antenna main body (111) has a slot plate (113). A main beam (115) having radiation directivity, extending in a direction inclined a tilt angle &thgr; alone from a direction normal to a plane P1 of the slot plate (113) is set to the slot array antenna main body (111). The dielectric cover (116) has an inclination angle &agr; formed by an outer plane P3 and an inner plane P4 and is comprised of a dielectric material having a refractive index n. The inner plane P4 of the dielectric cover (116) is provided so as to oppose to the slot plate (113) of the slot array antenna main body (111). Thus, the main beam (115) having the radiation directivity is transmitted through and refracted by the dielectric cover (116), so that the tilt angle &thgr; is corrected to allow the main beam to extend in a direction orthogonal to the outer plane P3 of the dielectric cover (116).

Abstract: A dual-polarization common aperture antenna having fully populated common aperture dual polarized arrays. The inventive antenna includes a first and second arrays of radiating slots disposed in a faceplate. The second array is generally orthogonal and therefor cross-polarized relative to the first array. The first array is waveguide fed and the second array is stripline fed. In the illustrative implementation, the first array and the second array share a common aperture. The common aperture is fully populated and each array uses the aperture in its entirety. The first and second arrays of slots are arranged for four-way symmetry. Each slot in the first array is a vertically oriented, iris-excited shunt slot fed by a rectangular waveguide and centered on a broad wall thereof. The second array is a standing wave array in which each slot is an air cavity backed slot fed by an inverted micro-stripline offset from a center thereof.

Abstract: A dual band antenna feed is made with an embedded waveguide structure to enable combining of Ka and Ku band signals without the need for an additional cavity-type filter. The antenna feed includes a Ka and Ku band interface section (22) with two Ka band vertical polarization waveguide sections (31) and (32), and a single Ku band waveguide section (34) which carries both vertical and horizontal polarization Ku band signals. The opposing walls (36-37) of the Ku band waveguide (34) carrying the vertical polarization Ku band signals are transitioned to step down from an input section (40) to successively smaller dimensioned sections (41-44), and then to step back up in successively larger dimensioned sections (45-47) to an output section (48). The two Ka band sections (31-32) are fed into openings in Ku band section.(46), on opposite sides of the opening for the Ku band transition section (45). The output section (48) then provides a combined Ka band vertical and Ku band horizontal and vertical signals.

Abstract: Guide members (37) extending from the microwave entrance to a ring member (34) are arranged in the direction of propagation of microwave in a radial waveguide. The guide members (37) contribute to prevention of complex electromagnetic mode due to a microwave reflected from the peripheral portion of the radial waveguide. Therefore, a uniform plasma can be produced because the radiation into the process chamber is uniform even not by disposing any electromagnetic absorbing member at the peripheral portion of the radial waveguide. Since the microwave reflected from the peripheral portion of the radial waveguide can be used to produce a plasma if any electromagnetic absorbing member is not disposed, the plasma can be produced efficiently, and excessive heat is not generated.

Abstract: A method for manufacturing a plane antenna that coats dielectric with conductor and forms a pattern free of the conductor on a surface of the dielectric which is otherwise coated with conductor includes the step of molding the dielectric and the pattern through injection molding using a mold that has the pattern.

Abstract: An irregular arrangement of slots in a cylindrical slot-array antenna is used to control the radiation pattern, achieving a variation of gain and/or beam tilt with azimuth. A design methodology for slot-array antennas achieves efficient and rapid optimization by minimizing the number of degrees of freedom and the number of significant mutual-coupling interactions. A useful range of designs is achieved by requiring that the slots are arranged in bays and that all slots, and their probes, are identical. Bays are separated by approximately a wavelength and, therefore, mutual coupling between bays can be ignored. Although the antenna slots are physically grouped into bays, the analytical approach groups the slots into paths defined by a simultaneous variation in z and &phgr; coordinates of the slots.

Abstract: A waveguide has a circuit board disposed therein so that the circuit board is orthogonal to the waveguide axis, and the circuit board has a first probe and a second probe formed thereon for respectively extracting the vertically and horizontally polarized waves, and has a fine radiation pattern also formed thereon which intersects each of the axes of the first and second probes at about 45 degrees. The fine radiation pattern is disposed in the vicinity of the waveguide axis and is formed by patterning in a rectangular shape that is asymmetrical relative to each of the axes of the two probes. This configuration allows the fine radiation pattern having a relatively small shape to prevent the electric field of these polarized waves in the waveguide from being disturbed, thereby leading to a reduction in reflection of these polarized waves at the fine radiator while the radiator achieves sufficient isolation between the vertically and horizontally polarized waves.

Abstract: An antenna apparatus includes: (a) A radial waveguide parallel with a reference plane and having a first conductive element in parallel spaced relation with a second conductive element. The radial waveguide has a first signal coupling locus for coupling signals with a host unit and a plurality of second signal coupling loci. The radial waveguide distributes signals between the first signal coupling locus and the second signal coupling loci. (b) Signal coupling elements, each presenting a respective signal coupling path for effecting signal coupling association with a respective second signal coupling locus. Each signal coupling path is perpendicular with the reference plane. (c) Antenna elements, each associated with a signal coupling element, each a polygonal element parallel with the reference plane. The radial waveguide element, the signal coupling elements and the antenna elements cooperate to transfer electromagnetic signals between the host unit and a medium adjacent to the antenna elements.

Abstract: A dielectric covered continuous slot (DCCS) antenna operable at RF frequencies. The antenna includes a conical or cylindrical dielectric radome structure having a nominal thickness equal to one quarter wavelength at a frequency of operation of the antenna. A conductive layer is defined on a contour surface of the radome structure, with a plurality of continuous slots defined in the conductive layer. The slots extend circumferentially about the longitudinal axis of the antenna and are spaced apart in a longitudinal sense. A serpentine end-fed signal transmission structure is disposed within the radome structure for carrying RF feed signals from an excitation end of the structure to a second end of the transmission structure.

Abstract: An apparatus for coupling electromagnetic signals from a signal transfer locus for electromagnetic transfer with a proximal medium includes: (a) An antenna element presenting elements in a spaced parallel relation with an antenna plane on a first dielectric substrate. (b) A transmission structure including a second dielectric substrate parallel with a transmission plane perpendicular with the antenna plane and including a slot line structure and a ground plane. The slot line structure has a first end proximal with the signal transfer locus and a second end within electromagnetic coupling range of the antenna element. The ground plane cooperates with the slot line structure and the second dielectric substrate to effect transmission of electromagnetic signals between the first end and the second end. (c) A coupling aperture traverses a respective antenna element adjacent each respective second end in register with the respective second end.

Abstract: A waveguide apparatus for bidirectional distribution of signals includes: (a) a first conductive element parallel with a reference plane; (b) a second conductive element in spaced parallel relation with the first element; (c) a first coupling locus situated in the first element; and (d) second coupling loci arrayed in the second element. Each second coupling locus includes an aperture traversing the second element at a lineal distance from the first coupling locus in a lineal plane perpendicular with the reference plane and containing a line from the first coupling locus. Each aperture has a major and a minor axis. The major axis establishes an installation attitude with respect to the lineal plane. The lineal distance and the installation attitude for each aperture are selected to distribute electromagnetic signals having substantially equal power.

Abstract: A radio frequency module includes a multi-chip substrate divided into separate substrates. An antenna block, a duplexer block, a transmitter block, a receiver block, and an oscillator block are formed on the separate substrates. Connection resonators, which are connected to transmission lines, are formed at edges of the separate substrates. The connection resonators on adjacent ones of the separate substrates are arranged close to each other such that the two adjacent resonators are electromagnetically coupled to each other. Thus, the transmission lines on the separate substrates are interconnected, and a signal can be propagated among the blocks.

Abstract: A crossed slot antenna, a method of fabricating same and a method of designing same. The antenna includes a cavity structure having conductive material on opposed surfaces thereof; and two slots in said conductive material, the slots having slightly different lengths and intersecting each other at or close to a 90 degree angle.

Abstract: A waveguide array antenna is composed from a number of open waveguides lying in one plane on the radiation side, of which a part is fed on the reverse side thereof, while the other ones are closed off. On the radiation side there is provided at least one two-layer structure, integrated with the open waveguides and consisting of a dielectric layer and a perforated, electrically conductive layer, in which two-layer structure, together with the layer or the face on which this two-layer structure has been provided, a periodically repeating electromagnetic resonance pattern can be generated in parallel directions relative to said face, of which the energy, outputted via the perforations, forms a transmission beam.

Abstract: Disclosed is a wideband directional antenna in a wireless communication service, comprising at least one radiation element, wherein the radiation element includes at least one loop, wherein one feeding point of the loop is connected to feeder and the other feeding point is connected to a ground distributor.

Abstract: A primary radiator comprises a base part in an upper surface of which a groove having a width of ½ to {fraction (1/1)} of the signal wavelength of a high frequency signal and a depth of about ¼ of the signal wavelength is formed as a waveguide for the high frequency signal, and a moving part which is placed in such a manner as to cover the groove, and which includes a coupling window for an electromagnetic wave of the high frequency signal and a reflecting member that is formed on a lower surface of the moving part in such a manner as to fit in a cross section of the groove and is positioned away from the coupling window by ⅛ to {fraction (1/1)} of the guide wavelength of the high frequency signal.

Abstract: An antenna system that employs an antenna element for both transmit and receive functions, where a dual band polarizer is used to convert linearly polarized signals to circularly polarized signals and vice versa for two frequency bands. The dual band polarizer includes a waveguide including corrugated structures extending from opposing sidewalls, where ridges in the structures extend perpendicular to the propagation direction of the signal. The height of the ridges taper from a lowest height at the ends of the waveguide to a largest height at the middle of the waveguide. The corrugated structures interact with the field components of the signal in the direction perpendicular to the ridges that cause that component to be delayed relative to the field components parallel to the ridges so that the signal changes accordingly and maintains the same magnitude.

Abstract: A waveguide network has a first port and a plurality of second ports connected to a two dimensional rectangular array of antenna elements. The second ports and antenna elements are oriented in a fixed direction. The waveguide network includes at least three successive sets of junctions and bends including a first set connected to the first port and a last set connected to the second ports. The junctions and bends in each set are all E-plane junctions and E-plane bends or are all H-plane junctions and H-plane bends, and successive sets alternate between a set of E-plane junctions and E-plane bends and a set of H-plane junctions and H-plane bends. The bends in at least one set lead in the fixed direction, and the bends in at least one other set, not including the last set, lead in a direction opposite to the first direction. Preferably, the waveguide bends in each set, other than the first set and possibly the last set, lead in a direction opposite to the bends in the previous set.

Abstract: The invention relates to an apparatus for transmitting radio-frequency signals using a signal generation unit (2), a signal line (3), a radiating element (4) and a waveguide (5) which is terminated in an end region by a back wall (6), where the signal generation unit (2) generates the radio-frequency signals, where the signal line (3) routes the radio-frequency signals to the radiating element (4), and where the radiating element (4) projects into the waveguide (5). The object is achieved by virtue of the radiating element (4) being arranged at an angle to the back wall (6) of the waveguide (5) or to a plane of the waveguide (5) which is parallel to the back wall (6).

Abstract: A slot antenna is described. The slot antenna includes a waveguide having a first side, a second side, a third side, and a fourth side, a closed end and an open end. The second side extends substantially perpendicularly from a first end of the first side. The third side extends substantially perpendicularly from a second end of the first side. The fourth side extends between the second side and the third side with the fourth side substantially parallel to the first side. The sides and the closed end form a cavity. A feeding point is located substantially midway between the first end of the first side and the second end of the first side. A T-Bar is located inside the cavity, the T-bar having a center member extending from the feeding point into the cavity and a cross member having a length extending across the cavity between the second side and the third side.

Abstract: An antenna element (30, 31, 32), comprising a wave-guide (1, 1′) comprising a number of slots (2, 2′, 3, 3′) being pairwise arranged, preferably at 90 degrees to one another and +/−45 degrees to the longitudinal direction of the waveguide has been described. The antenna element is coupled to a feeder (5) for providing a first wave inside the wave-guide (W_a) The antenna element comprises at least one amplitude and phase control unit (APC, 14, 15, 16) for controlling the phase and amplitude of a reflected or separately provided second wave (W_b) in relation to the first wave, the second wave propagating inside the wave-guide in an opposite direction to the first wave (W_a), whereby the polarization of an emitted or received wave (W) outside the wave-guide can be controlled. Moreover, a transceiver (33, 34, 35) adapted for controlling the polarization modes and a method for operating such a transceiver has been described.

Abstract: A slot array antenna includes a feed waveguide plate, a radiating waveguide plate and a slot plate adhered or connected together. The feed waveguide plate is formed with a first feed port and a feed waveguide to which an electromagnetic wave is fed via the feed port. The radiating waveguide plate is formed with second feed ports communicated to the feed waveguide, and radiating waveguides communicated to the second feed ports. The slot plate is formed with slots for radiating electromagnetic waves fed via the radiating waveguides. The first feed port is positioned substantially at the center of the length of the feed waveguide. The slot array antenna allows a polarization direction of the antenna to be freely adjusted while minimizing a wasteful space otherwise allotted to peripheral circuits and is therefore miniaturized.

Abstract: The invention relates to a method for producing a microwave filter (700), comprising making at least one through-cutout (750) in a first electrically conductive plate (740) shaped as a rectangle, with a short side and a long side, inserting the first plate (740) between a second (710) and a third (730) electrically conductive plate (710), the first plate being arranged parallel to the second and the third plate, making electrical connections (794, 795) between said three plates for interconnecting those edge surfaces on the plates which coincide with the direction of propagation of the electrical signals, as a result of which a space comprising one or more cavities is formed. The first plate (740) is arranged so that the extent of its short side coincides with the E-field of the microwave signals when they propagate in the filter (700), and the extent of its long side coincides with the direction of propagation of the electrical signals.

Abstract: An antenna for receiving and/or transmitting a radio frequency wave. The antenna includes a plurality of flared notch antennas disposed adjacent to each other and arranged such that their directions of maximum gain point in different directions, each of the flared notch antennas being associated with a pair of radio frequency radiating elements and wherein each radio frequency radiating element serves as a radio frequency radiating element for two different flared notch antennas and has a gap therein having a length equal to approximately one quarter wavelength of the radio frequency wave.

Abstract: An irregular arrangement of slots in a cylindrical slot-array antenna is used to control the radiation pattern, achieving a variation of gain and/or beam tilt with azimuth. A design methodology for slot-array antennas achieves efficient and rapid optimization by minimizing the number of degrees of freedom and the number of significant mutual-coupling interactions. A useful range of designs is achieved by requiring that the slots are arranged in bays and that all slots, and their probes, are identical. Bays are separated by approximately a wavelength and, therefore, mutual coupling between bays can be ignored. Although the antenna slots are physically grouped into bays, the analytical approach groups the slots into paths defined by a simultaneous variation in z and 0 coordinates of the slots.

Abstract: An antenna for simultaneous microwave transmission and reception is disclosed. The antenna comprises an array of wave-guides (10, 16) arranged side-by-side. In a typical embodiment of the array the wave-guides are rectangular wave-guides comprising a symmetrically or un-symmetrically placed ridge (8) and forming an array of vertical or horizontal columns. Opposite to the ridge at a second wall of the rectangular wave-guide slots (20, 21, 27, 28) are provided in the front wall, each aperture wave-guide being made narrow-band tuned for a respective transmitting or a receiving frequency in order to achieve a low coupling between transmitting and receiving to facilitate simultaneous transmission and reception at equal polarisation. Furthermore parallel to the array of slotted wave-guides a wave-guide filter (30, 35) may be arranged at each side forming a respective transmitting signal filter and a receiving signal filter to form a compact single aperture transmit/receive microwave antenna unit.

Abstract: A millimeter wave radar system including a microstrip antenna array that provides reduced return loss at microstrip antenna ports. The millimeter wave radar system includes at least one channel formed in a surface of a metal backing plate and a microstrip antenna array assembly. The assembly includes a plurality of conductive microstrips, a ground plane, and a dielectric substrate disposed between the conductive microstrips and the ground plane to form a plurality of microstrip transmission lines. The metal plate surface is mounted to the ground plate to form at least one waveguide. The ground plane has a plurality of slots formed therethrough to form a plurality of waveguide-to-microstrip transmission line transitions. The conductive microstrips have a plurality of tuning stubs coupled thereto and configured to provide reactive matching for the plurality of waveguide-to-microstrip transmission line transitions.

Abstract: A radar tracking antenna system including: a parabolic-cylinder reflector; and, a subset of Flanking Beam Array Steered Technique (FAST) line feeds coupled to the reflector as a feed assembly.

Abstract: A slot antenna element is provided in the form of a rectangular waveguide including at least one slot situated in the center of one broad side, a rectangular ridge arranged in the center of the interior surface of the other broad side, wherein the slot and the ridge each extend along the longitudinal direction of the waveguide, coupling devices, particularly a pin, arranged in the area of the slot, which excite the slot to emit electromagnetic energy, and compensation devices constructed on the surface of the ridge facing the slot, which compensation devices compensate the mismatch of the waveguide caused by the coupling devices with respect to the generator feeding the waveguide with electromagnetic energy. The compensation devices are constructed such that the ridge has a step-shaped indentation in the area of the slot.

Abstract: The invention relates to a polarizer (1) for electromagnetic radiation. The polarizer (1) has electrically conductive elements (5, 24) arranged in parallel and it a given distance from each other. The elements (5, 24) are held in position by at least one spacer (3, 7, 9, 23). Each spacer (3, 7, 9, 23) is made of a low dielectric material.

Abstract: A radiating coaxial cable having a longitudinal axis comprises an inner conductor having a longitudinal axis wherein the axis of the inner conductor defines the axis of the cable. A dielectric material surrounds the inner conductor. A continuous outer conductor surrounds the dielectric in direct contact therewith and is spaced from the inner conductor. The outer conductor has a plurality of slots disposed therein. Adjacent slots are spaced in the axial direction a distance S. One or more adjacent slots are grouped together in a cell. The cable has a plurality of cells. Adjacent cells are angularly disposed from each other by an angle &agr;.

Abstract: A waveguide slot array antenna system, for use with a communications system 30 disposed on a satellite. The waveguide slot array antenna system comprises a feed waveguide having an input port and multiple output ports, a waveguide slot array having a plurality of slots formed therein that is coupled to the feed waveguide, and a waveguide lens disposed adjacent to the waveguide slot array. The phase of each contributing radiating waveguide is controlled to achieve radiation pattern shaping. Inner dimensions of the rectangular waveguides are designed to provide a phase velocity inside each waveguide that results in the appropriate radiated phase at the output of the waveguides. The phase radiated by each rectangular waveguide is determined by design, and the radiation pattern that results from the combined contributions of the array can be shaped to produce a complex radiation contour.

Abstract: A quick disconnect assembly 200 simply and quickly connects two components to one another with the high degree of accuracy while eliminating small, losable parts. The quick disconnect assembly includes a receiver 202 and a fork 206. The receiver is attached to a first fitting 204 on a first component 132. A fork end brace 205 extends out from the receiver to provide an attachment flange for the fork. The second component 137 has a second fitting 208 that is correspondingly shaped to mate against the first fitting and to house within the receiver. The fork is attached via a lanyard to the second fitting. The fork includes a securement knob 210 having threadings 207 that projects through the base of the fork. Rotation of the knob advances or retracts the threadings. The legs of the fork contain protrusions 212 and 214 are correspondingly shaped to mate with depressions 216 and 218 in the receiver.

Abstract: A millimeter wave radar system that is less sensitive to process misalignment. The millimeter wave radar system includes at least one channel formed in a surface of a backing plate; and, a microstrip antenna array assembly including a plurality of conductive microstrips, a ground plane, and a dielectric substrate disposed between the conductive microstrips and the ground plane to form a plurality of microstrip transmission lines. The plate surface is mounted to the ground plate to form at least one waveguide. The ground plane has a plurality of slots formed therethrough to form a plurality of waveguide-to-microstrip transmission line transitions. A portion of the ground plane comprising a wall of the waveguide has a plurality of slots formed therethrough for transferring electromagnetic wave energy between the microstrip transmission lines and the waveguide. The slots are placed on the same side of the longitudinal centerline of the waveguide wall.

Abstract: A non-radiative hybrid dielectric line transition permits a line transformation between two different types of non-radiative dielectric lines to be performed in a limited space. In addition, a non-radiative dielectric line component, an antenna apparatus, and a wireless apparatus include the above line transition. In this structure, a dielectric strip is disposed between a lower conductive plate and an upper conductive plate to form each of a hyper NRD waveguide (HNRD) and a normal NRD waveguide (NNRD). Between the two waveguides, grooves whose depths gradually become shallow from the HNRD to the NNRD are formed for receiving a third non-radiative dielectric line for performing a line transformation.

Abstract: In one embodiment, the present invention provides an antenna array for transmitting one or more beams in a communication system. The antenna includes a cavity slot antenna array that is adapted to be operatively connected to a beam forming module (e.g., via a plurality of signal feed lines that are connected to radiating signal probes). The antenna array has one or more cavity slot columns adjacently fixed to one another with each of the one or more columns having at least one cavity slot antenna element for providing a radiating beam component. The combined cavity slot elements from the one or more columns define a cavity slot array for providing the one or more beams from the cavity slot beam components.