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"I watched his countenance closely, to see if he was not deranged ... and I was assured by other senators after he left the room that they had no confidence in it."
U.S. Senator Smith of Indiana ; After seeing Samuel Morse demonstrate the telegraph.
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| Number | Title | Issue Date |
| 7973613 | Mode converter and microwave rotary joint with the mode converter A microwave rotary joint comprises a mode converter for converting microwave signals of a TE01 circular symmetric mode, and the mode converter comprises: two circular waveguides, one end of each of the waveguides has a circular input/output port; and two ... | 07/05/2011 |
| 7907031 | Transit structure between a waveguide and a dielectric waveguide having a matching cavity A transit structure of a standard waveguide and a dielectric waveguide is related to connecting the dielectric dielectric waveguide to the standard waveguide. The transit structure includes: a cavity to match the dielectric waveguide and the standard waveguide, wher... | 03/15/2011 |
| 7893789 | Waveguide transitions and method of forming components A waveguide transition for transitioning from an overmoded waveguide to another waveguide is provided, where one end of the waveguide is configured to connect to a rectangular waveguide and the other end is configured to connect to an elliptical waveguide. The trans... | 02/22/2011 |
| 7515013 | Rectangular waveguide cavity launch An apparatus and method relating to a rectangular waveguide cavity launch are disclosed that enable coupling an electromagnetic wave from the top surface of a waveguide distribution network formed into a conductive plate with the narrow wall of a rectangular wavegui... | 04/07/2009 |
| 7446623 | Mode transducer structure A mode transducer for converting an electromagnetic wave between TE1,0 and TM0,1 modes. A rectangular waveguide guides the wave while in TE1,0 mode and a circular waveguide guides the wave while in TM0,1 mode. The rectangu... | 11/04/2008 |
| 7420434 | Circular to rectangular waveguide converter including a bend section and mode suppressor A compact circular waveguide system can connect circular waveguides through a bend while avoiding excessive interaction between the orthogonal modes of the circular waveguides. A compact bend system with circular waveguide input and output can be achieved by providi... | 09/02/2008 |
| 7408427 | Compact multi-frequency feed with/without tracking A method and apparatus forming an efficient and compact waveguide feed with all components for processing signals in multi-frequency band antenna feeds with single/dual linear/circular polarizations with/without tracking. The layout can be realized in a split block ... | 08/05/2008 |
| 7394335 | Polarized high-order mode electromagnetic wave coupler and its coupling method The a polarized high-order mode electromagnetic wave converter and its coupling method, uses bifurcate structure to divide the input wave into two signals with the same amplitude but opposition phases, which are then inputted into a circular main waveguide through w... | 07/01/2008 |
| 7369011 | High order mode electromagnetic wave coupler and coupling method using proportional distributing waves The high order mode electromagnetic wave coupler and coupling method uses one or more Y-shaped bifurcated waveguides to divide the wave to one or more order, so as to divide the target electromagnetic wave proportionally into equal shares. The waveguide is used to i... | 05/06/2008 |
| 7339541 | Wideband cavity-backed antenna 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 radiator elements that a... | 03/04/2008 |
| 7330088 | Waveguide orthomode transducer A waveguide orthomode transducer includes a first radio wave conducting means for conducting an electric wave of a horizontally polarized wave branched by an electric wave branch means, for conducting another electric wave of the horizontally polarized wave, for com... | 02/12/2008 |
| 7323949 | Method for conversion of waveguide modes, mode-converting arrangement and antenna arrangement The invention relates to a method for conversion of waveguide modes from a mode of type TM01 to mode of type TE11 for transmission of power within the microwave range. The invention also relates to a mode-converting arrangement and an antenna a... | 01/29/2008 |
| 7321277 | Waveguide directional filter A waveguide directional filter for combining multiple high power UHF television broadcasting transmitters on to a common antenna. The directional filter arrangement includes an input waveguide, an output waveguide and an interconnected cascade assembly of two or mor... | 01/22/2008 |
| 7277061 | Single aperture monopulse antenna An antenna comprises a polarizer, a phasing network and a field radiating element such as a horn. The polarizer and phasing network generate a plurality of phase shifted circularly polarised waves which are superimposed to produce multiple antenna field patterns fro... | 10/02/2007 |
| 7239285 | Circular polarity elliptical horn antenna A relatively low cost, easy to install and aesthetically pleasing digital video broadcast from satellite (DVBS) elliptical horn antenna designed as part of a reflector antenna system to receive satellite television broadcast signals with circular polarity. This type... | 07/03/2007 |
| 7227428 | RF module and mode converting structure having magnetic field matching and penetrating conductor patterns The present invention is directed to enable mode conversion between a TEM mode and another mode to be performed among a plurality of waveguides. An RF module comprises: a microstrip line as a first waveguide for propagating electromagnetic waves in a TEM mode; and a... | 06/05/2007 |
| 7212087 | Twisted waveguide and wireless device H plane and E plane of a second rectangular waveguide element are inclined at an angle of 45° with respect to H plane and E plane of a first rectangular waveguide element. A connection element disposed between the first and second rectangular waveguide elements has... | 05/01/2007 |
| 7200301 | Multi-channel grating design technique A method of improving a grating design function describing a refractive index variation defining a multi-channel grating structure in a waveguide material, the improvement being a reduced maximum refractive index variation in the waveguide material along the grating... | 04/03/2007 |
| 7129504 | Method and apparatus for generation and frequency tuning of modulated, high current electron beams Generating and frequency tuning of modulated high current electron beams and a specific efficient, high current, frequency-tunable device for generating intense radio frequency (RF), microwave electromagnetic fields in a rectangular waveguide. Current multiplication... | 10/31/2006 |
| 7102581 | Multiband waveguide reflector antenna feed A multiband waveguide reflector antenna feed comprises waveguide feeds in a concentric architecture. A waveguide feed is located in the center and coaxial waveguide feeds are disposed around the center feed. The waveguide feeds may be all-metallic with the center fe... | 09/05/2006 |
| 7102292 | Method and device for removing harmonics in semiconductor plasma processing systems A system and method for maintaining a plasma in a plasma region by supplying RF power at a fundamental frequency to the plasma region together with a gas in order to create an RF electromagnetic field which interacts with the gas to create a plasma that contains ele... | 09/05/2006 |
| 7102459 | Power combiner A power combiner for the combining of symmetric and asymmetric traveling wave energy comprises a feed waveguide having an input port and a launching port, a reflector for reflecting launched wave energy, and a final waveguide for the collection and transport of laun... | 09/05/2006 |
| 7091804 | Rotary joint The present invention aims at providing a rotary joint which is of a thin type and has broad band characteristics and which is low in loss and is excellent in power resistance as well. In order to attain the object, the rotary joint includes: first and second polari... | 08/15/2006 |
| 7068121 | Apparatus for signal transitioning from a device to a waveguide A signal transmission apparatus includes a first waveguide, a second waveguide and a third waveguide. The transitions between the first, second and third waveguides are substantially co-impedance matched. The signal transmission apparatus may be a multi-port device,... | 06/27/2006 |
| 7034771 | Multi-beam and multi-band antenna system for communication satellites An antenna system includes a reflector having a modified-paraboloid shape; and a multi-beam, multi-band feed array located at a focal point of the reflector so that the antenna system forms a multiple congruent beams that are contiguous. The system has a single refl... | 04/25/2006 |
| 7030720 | Floating microwave filter in a waveguide structure A floating microwave filter in a waveguide structure comprises filtering elements sandwiched between two foam half-bars that are placed inside a waveguide. The filtering elements are metal features etched in the surface of one of the two foam half-bars and the waveg... | 04/18/2006 |
| 7019603 | Waveguide type ortho mode transducer An object of the present invention is to obtain a waveguide type polarizer, which enables miniaturization thereof, shortening of an axis, and broad band promotion, and which has high performance. In order to attain the object, the waveguide type polarizer includes: ... | 03/28/2006 |
| 7013121 | Frequency conversion circuit using common local synthesizer A radio for use in microwave datalink applications in which a common local oscillator is used for both a final radio frequency (RF) up-converter stage and an initial RF down converter stage. The frequency of the common local oscillator corresponds to an integer mult... | 03/14/2006 |
| 6968533 | Process description apparatus and method, and process classification method A process is described based on activities and dependence relationship between the activities. The dependence relationship is described based on resource and coordination method. An epistemological ground is set corresponding to the domain of the process and other c... | 11/22/2005 |
| 6952143 | Millimeter-wave signal transmission device A transition for transmitting a mm-wave signal from one plane to another, the transition comprising: (a) first and second transmission lines on parallel planes; (b) a third transmission line orthogonal to the first and second transmission lines, wherein either the f... | 10/04/2005 |
| 6917260 | Waveguide directional filter A waveguide directional filter for combining multiple high power UHF television broadcasting transmitters on to a common antenna. The directional filter arrangement includes an input waveguide, an output waveguide and an interconnected cascade assembly of two or mor... | 07/12/2005 |
| 6873220 | Method and apparatus for receiving linear polarization signal and circular polarization signal The present invention discloses a method and apparatus for simultaneously receiving linear polarization signals and circular polarization signals. First, the present invention gathers a plurality of signals and separates them into a first linear polarization signal ... | 03/29/2005 |
| 6867660 | Line transition device between dielectric waveguide and waveguide, and oscillator, and transmitter using the same A line transition device which intervenes between a non radiative dielectric waveguide and a hollow waveguide for example, includes a dielectric waveguide having a dielectric strip held by a pair of conductors which face each other, and a waveguide, wherein a part o... | 03/15/2005 |
| 6861999 | Converter structure for use in universal LNB A converter main body is formed from composite material wherein reinforcing material comprising carbon fiber is combined with plastic material comprising ABS resin in an amount that is 30 wt % thereof. The coefficient of linear expansion of that composite material i... | 03/01/2005 |
| 6847270 | Waveguide group branching filter The waveguide group branching filter according to the present invention is formed by boring out of two metal blocks constituent circuits including a circular-to-square waveguide multistage transformer 1, the branch waveguide polarizer/branching filter 4 | 01/25/2005 |
| 6816042 | Process to make lightweight objects An “inside out” process is used to make RF antennas and components or higher frequency components and/or optics. An electroformed single or multi layer of metal, such as copper, is applied to a reusable or disposable mandrel. Additional metal or composite compon... | 11/09/2004 |
| 6794950 | Waveguide to microstrip transition A waveguide to microstrip T-junction includes a microstrip transmission line structure having a ground plane separated from a strip conductor by a dielectric layer, the ground plane defining an aperture; a waveguide channel having a conductive periphery being electr... | 09/21/2004 |
| 6750735 | Waveguide polarizer The waveguide polarizer is a device for microwave antenna systems consisting of a waveguide section, with circular cross-section, being equipped with two terminal flanges for connection to other circular guides. A certain number of elliptical irises are arranged ins... | 06/15/2004 |
| 6714096 | Waveguide directional filter A waveguide directional filter is described for combining multiple high power UHF television broadcasting transmitters on to a common antenna. The filter arrangement comprises an input waveguide (1) and an output waveguide (2). The waveguides are recta... | 03/30/2004 |
| 6710674 | Waveguide fitting A waveguide fitting for connecting in particular a rectangular waveguide to an elliptical waveguide can be assembled particularly easily and yet provides a very low-reflection connection if the fitting at least at one end is conductively provided with the first sect... | 03/23/2004 |
