Abstract: The present invention relates to an antenna structure comprising a dielectric pellet and a dielectric substrate with upper and lower surfaces and at least one groundplane, wherein the dielectric pellet is elevated above the upper surface of the dielectric substrate such that the dielectric pellet does not directly contact the dielectric substrate or the groundplane, and wherein the dielectric pellet is provided with a conductive direct feed structure. A radiating antenna component is additionally provided and arranged so as to be excited by the dielectric pellet. Elevating the dielectric antenna component so that it does not directly contact the groundplane or the dielectric substrate significantly improves bandwidth of the antenna as a whole.

Abstract: An integrated antenna device comprising a first, dielectric antenna component and a second, electrically-conductive antenna component, wherein the first and second components are not electrically connected to each other but are mutually arranged such that the second component is parasitically driven by the first component when the first component is fed with a predetermined signal.

Abstract: An integrated antenna device comprising a first, dielectric antenna component (1) and a second, electrically-conductive antenna component (9), wherein the first and second components are not electrically connected to each other but are mutually arranged such that the second component is parasitically driven by the first component when the first component is fed with a predetermined signal.

Abstract: There is disclosed a dielectric resonator antenna adapted to resonate in an EH11? resonance mode, and also a method for the manufacture thereof. The desired resonance mode is achieved by careful positioning of a dielectric resonator (2) on a grounded substrate (1), the resonator (2) being fed by way of a microstrip feed line (9) and a slot (6) in the grounded substrate (1). Because the EH11? resonance mode has nulls in a direction of longitudinal extension of the dielectric resonator (2), a plurality of antenna can be placed end-to-end so as to form an array with reduced coupling between adjacent antennas and with vertical polarisation, which is desirable for mobile communications applications.

Abstract: There is disclosed an antenna device including a dielectric substrate having a first, upper surface and a second, lower surface, a conductive groundplane on the second surface or located between the first and second surfaces. At least two conductive feedlines are formed on the first surface and extend from feed points to predetermined radiating points at edge or corner parts of the first surface. The groundplane does not extend under the radiating points. The groundplane is configured as to extend between the radiating points and the feedlines are widened at the radiating points and/or are provided with discrete dielectric elements at the radiating points. The antenna device provides broadband performance and good diversity within a small space.

Abstract: There is disclosed a dielectric antenna comprising a dielectric resonator mounted in direct contact with a microstrip transmission line formed on one side of a printed circuit board. The dielectric antenna may be a dielectric resonator antenna (DRA), a high dielectric antenna (HDA) or a dielectrically-loaded antenna. The simple construction of the antenna leads to improved manufacturing reliability and efficiency, and allows all functional features of the antenna to be located on one side of a printed circuit board (PCB) substrate.

Abstract: A head-gauge/tank-bladder device for measuring the pressure of liquid within a tank. The invention provides for measuring the tank pressure while maintaining the gauge isolated form the liquid within the tank. The invention is connects a gauge to a fluid filled tank through at least one threaded connection. On the other end of the tube, a bladder is attached. A liquid contained within the tubing transmits the tank fluid pressure to the gauge.

Abstract: An image input terminal (IIT) with automatic document handler for feeding documents to be scanned into registered position on the IIT platen. The IIT includes a pair of multi-element scanning arrays with cooperating scan lamp and optics on a movable carriage disposed in scanning relationship with the platen. Analog image signals generated by the scanning arrays are initially processed in separate channels and then combined into a serial stream. The stream of analog image signals may optionally be thresholded or screened to provide binary level image signals or converted to multi-bit gray scale. A control system including microprocessor provides timing and control signals for synchronizing operation of the scanning carriage, document handler, and image signal reading and processing together with electronic crossover between arrays to avoid loss of data, automatic signal gain and deletion of bad image signals or pixels.

Abstract: A high speed parallel process raster input scanner employing time delay in integration (TDI) arrays for scanning plural lines of an original document. The lines of image signals output by the arrays are processed simultaneously, such processing including a two dimensional digital processor for processing text and pictorial image signals which are then input to a detector for selecting one or the other of the text and pictorial image signals for output from the scanner.

Abstract: An automatic document handling system particularly suitable for raster input scanners which is capable of operating in either a simplex or duplex document handling mode. The document handling system has document input and output trays in operative relation with a reversible document transport roll which in turn cooperates with a pair of displaceable pinch bars to provide both a document feeding nip and means for selectively routing the document for either duplex and simplex processing. A document guide having an integral control gate effects inverting and recirculation of the document for duplex mode or in simplex mode return of the document to the document supply tray.

Abstract: A raster input scanner incorporating a scanning array, a platen for supporting documents to be scanned, a lens, and an illuminator. The lens is supported for micro movement in close proximity to the array, such movement being imparted by a linear motor. In one embodiment, the illuminator comprises a stationary light source with oscillating mirror for sweeping a wedge-like beam of light across the platen in synchronism with movement of the lens to progressively illuminate the document being scanned. A park position is provided for the lens and illuminator and a document feeder provided to transport the document to be scanned across a scan slit provided in the platen in an alternate operating mode.In a second embodiment, the illuminator comprises a lamp cavity reciprocable along a path parallel to the platen to progressively illuminate the platen.

Abstract: A constant velocity transport for moving documents of various thicknesses at a uniform rate across the scan aperture of a raster input scanner employing one or more solid state arrays for scanning the document through the aperture line by line. A floating viewing element is disposed in the scan aperture with the document transport comprising a single feed roll disposed opposite the viewing element and in engagement therewith. The viewing element and the feed roll cooperate to form a nip between which the document being scanned passes. A pair of leaf springs bias the viewingelement into operative engagement with the feed roll while permitting various thickness documents to be fed. A controlled friction surface is provided on the viewing element at the point where contact between the feed roll and viewing element is established to obviate velocity perturbations in the feed roll resulting from changeover from a no document feed to a document feed state and vice versa.

Abstract: A lead screw is provided to move two or more document scanning elements at separate and differing rates of speed. In a preferred embodiment the lead screw consists of two threaded segments, each segment having a length and pitch which provides a 2:1 ratio of travel to a scan element threadingly engaged therein.

Abstract: An image input terminal (IIT) with automatic document handler for feeding documents to be scanned into registered position on the IIT platen. The IIT includes a pair of multi-element scanning arrays with cooperating scan lamp and optics on a movable carriage disposed in scanning relationship with the platen. Analog image signals generated by the scanning arrays are initially processed in separate channels and then combined into a serial stream. The stream of analog image signals may optionally be thresholded or screened to provide binary level image signals or converted to multi-bit gray scale.A control system including microprocessor provides timing and control signals for synchronizing operation of the scanning carriage, document handler, and image signal reading and processing together with electronic crossover between arrays to avoid loss of data, automatic signal gain control, and deletion of bad image signals or pixels.

Abstract: An apparatus in which a photoconductive belt is advanced to move incremental unused portions thereof to an operative location as incremental used portions move to an inoperative location. The apparatus includes a segmented support frame having a supply station storing unused portions of the photoconductive belt and a receiving station storing used portions thereof associated with each segment.

Abstract: A reproducing machine in which successive photosensitive members are advanced from storage to the operative location therein. Each photosensitive member is used in the reproducing machine a predetermined interval and then automatically removed therefrom with the next successive photosensitive member being advanced thereto.

Abstract: An apparatus in which a photoconductive belt is incremented to advance unused portions thereof to an operative location as used portions advance to an inoperative location. The apparatus advances automatically portions of the photoconductive belt as the belt support member moves a pre-selected interval.

Abstract: Automatic electrostatographic reproduction apparatus in which an image to be reproduced is moved during imaging thereof on to a moving photoconductive plate. The apparatus includes a simple and effective drive for the image carrier. The drive is particularly suited for use in apparatus incorporating an intermediate image storage device as the image carrier to enable signal encoded images, the components of which are displayed sequentially, to be stored and displayed in a format acceptable to the electrostatographic processor. The drive permits the image carrier to be driven synchronously with the photoconductive plate while enabling the image carrier to be held stationary without interrupting the reproduction process. Thus the image storage device may, following scanning thereof, be held stationary for receiving and storing a fresh image while the previous image is still being treated in the electrostatographic processor.