Did You Know...
...that it was melting ice cream that inspired the invention of the outboard motor? It was a lovely August day and Ole Evinrude was rowing his boat to his favorite island picnic spot. As he rowed, he watched his ice cream melt and wished he had a faster way to get to the island. At that moment the idea for the outboard motor was born!
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| Number | Title | Issue Date |
| 8076997 | Continously tunable waveguide delay line having a displaceable perturbing member A tunable delay line for radiofrequency applications includes a waveguide and a dielectric perturbing member that is displaceable relative to the waveguide for varying the delay imparted by the line. The waveguide is a ridge waveguide and the perturbing member is ar... | 12/13/2011 |
| 7262546 | Piezoelectric/electrostrictive element and piezoelectric/electrostrictive device A piezoelectric/electrostrictive element including a substantially trapezoidal laminate having narrower and wider surfaces lying substantially in parallel to each other and first and second surfaces opposed to each other between the narrower and wider surfaces. The ... | 08/28/2007 |
| 7224246 | Apparatus for steering an antenna system An antenna system comprises an antenna assembly having an angle of electrical tilt and a plurality of antenna elements each arranged to receive signals through a respective transmission line. Each transmission line is shortened or lengthened by moving a coupling lin... | 05/29/2007 |
| 7161344 | Method and structure for variable pitch microwave probe assembly A coplanar waveguide (CPW) probe includes at least one center probe element, each having a respective center probe contact point and at least one peripheral probe element, each having a respective peripheral contact point. The pitch between the at least one center c... | 01/09/2007 |
| 7157989 | Inline waveguide phase shifter with electromechanical means to change the physical dimension of the waveguide An inline phase shifter including a waveguide having a waveguide path and one of a micro-electromechanical device and a piezoelectric device positioned sufficiently adjacent to the waveguide for changing physical dimensions of the waveguide path upon actuation of th... | 01/02/2007 |
| 7142165 | Waveguide and slotted antenna array with moveable rows of spaced posts A waveguide structure including two parallels electrically conducting ground planes (1,2), each of which includes at least one row of spaced apart electrically conducting posts (3). The rows of posts are arranged substantially parallel to one another a... | 11/28/2006 |
| 7127206 | Microwave arrangement with resonance state tuning for affixing toner onto printing material A microwave arrangement for affixing the toner onto a printing material by heating, wherein a resonator chamber for feeding printing material therethrough includes at least one element, which extends into the resonator chamber and is used for tuning the resonance st... | 10/24/2006 |
| 7079077 | Methods and apparatus for implementation of an antenna for a wireless communication device A wireless communication device includes an antenna configured with two conductive elements separated by an insulating medium providing a separation distance. One conductive element is a ground plane and the other is a microstrip line. The microstrip line and the gr... | 07/18/2006 |
| 7061445 | Multiband/multichannel wireless feeder approach An antenna system comprising a support structure and a multiband/multichannel wireless feeder configured for coupling antennas located proximate the top of a support structure with electronics located proximate the base of the support structure to overcome losses ty... | 06/13/2006 |
| 7053849 | Switchable polarizer A switchable polarizer assembly, having a coupler, a polarizer module with a plurality of apertures, each aperture adapted for a desired transition, an antenna adapter and a central waveguide with a center longitudinal axis passing through the coupler and the antenn... | 05/30/2006 |
| 7046104 | Controlling a time delay line by adding and removing a fluidic dielectric A variable true time delay line (100) includes an RF transmission line (110) and at least one fluidic delay unit (108). The fluidic delay unit includes a fluidic dielectric contained in a cavity (109) and coupled to the RF transmission li... | 05/16/2006 |
| 7026889 | Adjustable antenna feed network with integrated phase shifter A device for feeding signals between a common line and two or more ports. The device including a branched network of feedlines coupling the common line with the ports. The feedlines have transformer portions of varying width for reducing reflection of signals passin... | 04/11/2006 |
| 7012482 | RF phase delay lines with variable displacement fluidic dielectric A phase delay line (100). The phase delay line can include an RF transmission line (110) and a fluid channel (109) having a serpentine configuration. The transmission line can be coupled to a solid dielectric substrate material (102), for... | 03/14/2006 |
| 6998937 | Controlling a phase delay line by adding and removing a fluidic dielectric A variable phase delay line (100). The variable phase delay line (100) can include an RF transmission line (102) and a fluid channel (130) having a serpentine configuration. The fluid channel (130) can be coupled to the RF transmis... | 02/14/2006 |
| 6993219 | Waveguide/MEMS switch A waveguide/MEMS switch adapted to redirect optical signals between output ports based on a phase shift change generated by motion of one or more movable MEMS mirrors incorporated therein. Advantageously, such a switch has a relatively high switching speed and low p... | 01/31/2006 |
| 6975188 | Variable waveguide A variable waveguide system (100). The variable waveguide system (100) includes a waveguide (102), a dielectric structure (116) including at least one cavity disposed within the waveguide, and a conductive fluid (126). The cavity i... | 12/13/2005 |
| 6963314 | Dynamically variable beamwidth and variable azimuth scanning antenna A dynamically variable beamwidth and/or variable azimuth scanning antenna includes a plurality of active radiating columns and a plurality of continuously adjustable mechanical phase shifters. The columns define a beam having a beamwidth and an azimuth scan angle. E... | 11/08/2005 |
| 6952145 | Transverse mode control in a transmission line A waveguide apparatus (100) and method (300) of mode control can include a waveguide structure (102) defining at least one cavity (116) disposed within the waveguide apparatus. The waveguide apparatus has at least a first operational stat... | 10/04/2005 |
| 6930568 | RF delay lines with variable composition fluidic dielectric Method and apparatus for producing a variable delay for an RF signal. The method can include the step of propagating the RF signal along an RF transmission line, coupling a fluidic dielectric to the RF transmission line, and dynamically changing a composition of the... | 08/16/2005 |
| 6922169 | Antenna, base station and power coupler A power coupler including a differential phase shifter for differentially adjusting the relative phase between signals on a pair of signal lines; and a hybrid coupler which is coupled to the pair of signal lines. The power coupler may be employed in an antenna inclu... | 07/26/2005 |
| 6452713 | Device for tuning the propagation of electromagnetic energy A device for tuning the propagation of electromagnetic energy. The device includes a first and a second periodic dielectric structure. One of the periodic dielectric structures is movable with respect to the other periodic dielectric structure to modify a... | 09/17/2002 |
| 6392507 | Signal-processing apparatus for shifting phase of a signal inputted thereto and attenuating the signal A signal-processing apparatus is capable of stably operating without regard to outside circumstances and miniaturizing. The signal-processing apparatus for shifting phase of a signal inputted thereto and attenuating the signal includes an input connector ... | 05/21/2002 |
| 6320481 | Compact phase shifter circuit using coupled lines The present invention provides a switched-line phase shifter (300) for creating a differential phase shift between switched transmission paths (302, 304). A switched-line phase shifter (300) incorporates Schiffman sections (306, 308) of lengths which are ... | 11/20/2001 |
| 6281766 | Stacked piezoelectric actuators to control waveguide phase shifters and method of manufacture thereof Waveguide phase shifter (200, FIG. 2 and 300, FIG. 3) uses piezoelectric ceramics to implement a voltage variable actuator (270, 370) for moving at least one dielectric vane (255, 355) relative to a reference surface (206, 306) in a waveguide cavity (285,... | 08/28/2001 |
| 6204811 | Piezoelectrical mechanical actuators for use with small actuator distances and arrays A piezoelectric actuator control circuit includes a first conductor attached to the free end of a piezoelectric device and a second conductor rigidly fixed at a position spaced from the piezoelectric device such that a variable capacitor is created betwee... | 03/20/2001 |
| 6133887 | Antenna device, and transmitting/receiving unit An antenna device and a transmitting and receiving unit using the device which are capable of simultaneously polarizing each direction of a plurality of beams are provided without increasing the size of the whole device. For example, when the detection is... | 10/17/2000 |
| 6016122 | Phased array antenna using piezoelectric actuators in variable capacitors to control phase shifters and method of manufacture thereof A phased array antenna (1000) is formed using a number of independently controllable piezoelectric phase shifters (1300) which results in a low cost phased array antenna that is functional at microwave and/or millimeter wave frequencies. In addition, the ... | 01/18/2000 |
| 5905462 | Steerable phased-array antenna with series feed network A phased-array antenna having either a corporate or series feed network advantageously includes a phase-shifter array comprised of mechanical phase shifters for beam steering. In some embodiments, the phase-shifter array includes a plurality of phase-shif... | 05/18/1999 |
| 5877660 | Phase shifting device with rotatable cylindrical case having driver means on the end walls Input is applied to a two-partition circuit that substantially equally distributes input power into two partitions having a phase difference of 90°, and the thus-distributed output is applied to a first driver that generates circularly polarized wave. Th... | 03/02/1999 |
| 5825172 | Continuous up/down spectrum scaling of signals A rotating transmission line for use in spectrum up-scaling or down-scaling of signals. The rotating medium is characterized by different velocity gradients, whereby when a signal propagates in such medium, the signal undergoes a Doppler effect as it prop... | 10/20/1998 |
| 5576668 | Tandem circular polarizer A system (12) operative with at least one electromagnetic wave to produce a circularly polarized wave includes a plurality of polarizer sections (56) disposed along a direction of propagation of one electromagnetic wave. The polarizer sections have oppose... | 11/19/1996 |
| 5543765 | Integrated electronic elements with variable electrical characteristics, especially for microwave frequencies Disclosed are electronic elements with variable electrical characteristics, each element including at least one microcavity in which there shifts, with a limited clearance or range of play, at least one moving element made of an insulator material that is... | 08/06/1996 |
| 5504466 | Suspended dielectric and microstrip type microwave phase shifter and application to lobe scanning antenne networks A microwave phase shifter comprises superposed conductor and dielectric plates, and a conductor strip carried by the dielectric plate. It comprises means, such as a piezoelectric biplate, for moving one of the plates in relation to the other thereby modif... | 04/02/1996 |
| 5473294 | Planar variable power divider A novel planar variable power divider, using waveguide technology, includes two hybrids and two variable phase shifters. The variable power divider includes a variable phase shifter based on a 3 dB hybrid circuit terminated by two sliding non-contacting m... | 12/05/1995 |
| 5449412 | Apparatus and method for controlling plasma size and position in plasma-activated chemical vapor deposition processes A block of dielectric material having a long axis and a short axis and having low losses at a selected microwave frequency and a dielectric constant selected to produce a desired degree of phase modulation is mounted on a rotatable shaft in an orientation... | 09/12/1995 |
| 5410283 | Phase shifter for fine tuning a microwave applicator A phase shifter for shifting the phase angle of microwaves traveling in a waveguide of a microwave circuit. The phase shifter includes a dielectric plate which has first and second parallel surfaces, a distal edge, a proximate edge, a leading edge, and a ... | 04/25/1995 |
| 5376905 | Rotary vane variable power divider A power divider (20) includes two orthomode tee to cylindrical waveguide adapters (26, 34) coupled by a phase shift unit (48) having a slow-wave structure (68) located in a sidewall (82) of a waveguide section (50) at a position located 45 degrees between... | 12/27/1994 |
| 5268696 | Slotline reflective phase shifting array element utilizing electrostatic switches An apparatus is disclosed for providing a radiating element having an electrical reflective phase shifter for reflecting electromagnetic energy received from an electromagnetic energy source including a dielectric substrate having a top surface, a conduct... | 12/07/1993 |
| 5230740 | Apparatus for controlling plasma size and position in plasma-activated chemical vapor deposition processes comprising rotating dielectric A block of dielectric material having a long axis and a short axis and having low losses at a selected microwave frequency and a dielectric constant selected to produce a desired degree of phase modulation is mounted on a rotatable shaft in an orientation... | 07/27/1993 |
| 4845422 | Microwave proximity sensor The invention relates to a type of proximity sensor. In one form, two sinusoidal signals travel along two transmission lines near an object. When the distance between one or both of the lines and the object changes, the speed of travel of one or both of t... | 07/04/1989 |
