Class 333/162 - Helical line structures and lines developed from a helical structure

Subclass of Class 333 - Wave transmission lines and networks
Definition: Subject matter wherein the structure for retarding wave
No. of patents: 40
Last issue date: 02/05/2008

Number	Title	Issue Date
7327208	Printed circuit board including a notch filter for attenuating radio frequency interference A printed circuit board (PCB) including a notch filter, or other suitable filter, is implemented in a communication device for attenuating RFI in transmissions sent from the communication device. The filter includes filter line that runs between at least two conduct...	02/05/2008
7212095	Inductive element and manufacturing method of the same Conductor layers 2A and insulating layers 4A are alternately stacked so as to prepare a base material 17. A plurality of grooves 18 having a predetermined width are formed in a surface of the base material 17 in such a manner that ...	05/01/2007
7158004	Integrated circuit inductors The invention relates to an inductor comprising a plurality of interconnected conductive segments interwoven with a substrate. The inductance of the inductor is increased through the use of coatings and films of ferromagnetic materials such as magnetic metals, alloy...	01/02/2007
7098755	High power, high linearity and low insertion loss single pole double throw transmitter/receiver switch A high performance single-pole-double-throw (SPDT) Transmitter/Receiver (T/R) FET switch utilizes a plurality of multi-gate FETs in series to realize low insertion loss, low harmonic distortion and high power handling capabilities. The SPDT switch consists of an ant...	08/29/2006
6999037	Meander-lineless wide bandwidth L-shaped slot line antenna An asymmetric slotted L-shaped antenna is provided with a wide bandwidth in an exceedingly small size with good gain across the entire bandwidth by shorting out one end of the slot and by providing a capacitor at the other end of the slot, with the result that with ...	02/14/2006
6992557	Printed inductor capable of raising Q value There is disclosed a printed inductor 1 having a spiral coil formed outside a cavity 2 by providing an insulating substrate 3 with the cavity 2 extending in a direction orthogonal to that of the thickness of the insulating substrate 3	01/31/2006
6948230	Integrated circuit inductors The invention relates to an inductor comprising a plurality of interconnected conductive segments interwoven with a substrate. The inductance of the inductor is increased through the use of coatings and films of ferromagnetic materials such as magnetic metals, alloy...	09/27/2005
6910260	Integrated circuit inductors The invention relates to an inductor comprising a plurality of interconnected conductive segments interwoven with a substrate. The inductance of the inductor is increased through the use of coatings and films of ferromagnetic materials such as magnetic metals, alloy...	06/28/2005
6762654	Delay line A compact, small-size delay line that has excellent flatness in group delay time characteristic and an excellent frequency characteristic, is constructed such that one coil is divided into four inductors, and four stages of LC-π type low pass filters including indu...	07/13/2004
6737938	Phase shifter, phased-array antenna, and radar A phase shifter includes upper and lower conductive plates, and a dielectric strip sandwiched between the conductive plates, and a plurality of slots formed in the upper conductive plate, thereby forming a dielectric line. A rotator is positioned at either side of t...	05/18/2004
6667672	Compact high power analog electrically controlled phase shifter A high power ferrite microwave phase shifter that is both compact and low cost. The ferrite phase shifter includes a waveguide having a first cylinder and a second cylinder, the radius of the second cylinder being less than the radius of the first cylinde...	12/23/2003
6584675	Method for fabricating three dimensional traveling wave tube circuit elements using laser lithography A method for constructing thermally and dimensionally stable traveling wave tube circuits having high dimensional stability, narrow tolerances, and very small size by providing a small hollow preform constructed of a desired material which is coated with ...	07/01/2003
6313716	Slow wave meander line having sections of alternating impedance relative to a conductive plate A meander line includes a electrically conductive plate, a plurality of transmission line sections supported with respect to the conductive plate, wherein the plurality of sections includes a first section located relatively closer and parallel to the con...	11/06/2001
5977850	Multilayer ceramic package with center ground via for size reduction A multilayer ceramic package 200 with a center ground via 202 for size reduction is disclosed. Package 200 includes dielectric layers 204A-204G each having a major surface 206. The package also includes an input electrode 208 and an output electrode 210 a...	11/02/1999
5521568	Electrical delay line An electrical delay line is described. Said line is free from early or late arriving false signals of sufficient amplitude to trigger subsequent stages in the circuitry. This has been accomplished through use of a novel approach to designing the delay lin...	05/28/1996
5499005	Transmission line device using stacked conductive layers A transmission line device (200) employs a first ground plane (118) that is disposed on a first dielectric substrate (202). A first conductive layer (210) that encloses a first area (213)is disposed on a second dielectric substrate (206), which substrate ...	03/12/1996
5426404	Electrical circuit using low volume multilayer transmission line devices An electrical circuit (500) includes an input means (503) for providing an input signal, an output means for providing an output signal, and a transmission line device (421) disposed substantially between the input means (503) and the output means. The tr...	06/20/1995
5309125	Compact delay line formed of concentrically stacked, helically grooved, cylindrical channel-line structure A miniaturized cylindrical `channeline` delay line comprises a plurality of concentrically stacked cylindrical elements, surfaces of which are configured to form helically contoured `channeline` transmission line. The nested stack includes a first, genera...	05/03/1994
5231330	Digital helix for a traveling-wave tube and process for fabrication A traveling-wave tube, wherein the wire helix of prior art devices is replaced by a digital helix formed within a composite structure of thick or thin film substrates. The traveling-wave tube helix is formed from multiple substrate layers, each having con...	07/27/1993
5173669	Slow-wave structure having block supported helix structure The helix (10) of a slow-wave structure of a traveling wave tube is supported by a number of spaced dielectric blocks (34, 36) that are carried by a helical ribbon (26) in registry with the helix (10) itself. Registration of the ribbon (26) and its blocks...	12/22/1992
5132591	Travelling-wave tuve provided with a brazed "T" shaped helix delay line Disclosed is a travelling-wave tube with helix. The helix is mounted in a metal sleeve and is held in a centered position by at least three dielectric rods. Parts of the helix are in contact with the rods. The helix is made out of a thin strip of a metal ...	07/21/1992
4894628	Transmission delay line and method of manufacture A transmission delay line including a helical channel (2) formed in the surface of a cylinder (1), with a conductive sleeve (7) fitted to the cylinder to close the channel. A helical conductive member (4) is positioned within the channel (2) and spaced fr...	01/16/1990
4887054	Compact microstrip latching reciprocal phase shifter A latching type of microstrip reciprocal phase shifter is provided having a oroidal-shaped ferrite core with a length of microstrip conductor wound about the outer cylindrical surface of the core and a ground plane mounted on the inner cylindrical surface ...	12/12/1989
4851736	Helical waveguide to rectangular waveguide coupler Slow-wave structures are formed by the method of this invention in the form of helical or coupled-cavity structures. A helical waveguide form of slow-wave structure is formed of a solid rod of copper machined with a deep, narrow helical groove. A copper s...	07/25/1989
4785268	Dielectric waveguide delay line A delay line is provided for effecting a desired delay in the transmission of electromagnetic waves in the microwave and millimeter range of the spectrum. The line comprises a length L of a dielectric waveguide for transmission of electromagnetic waves co...	11/15/1988
4758807	Distributed constant type electromagnetic delay line This distributed constant type electromagnetic delay line has an elongated bobbin which includes, laminated together, a substantially rectangular dielectric layer and a substantially rectangular ground plane, and further includes an electroconductive stri...	07/19/1988
4729510	Coaxial shielded helical delay line and process A substrate is disclosed with a shielded delay line imbedded therein to obtain a delay of a preselected duration. The delay line comprises a conductor formed in the shape of a helical coil to reduce its overall dimension. The substrate is formed by superi...	03/08/1988
4572985	Traveling wave tube comprising a sleeve cut with grooves and its manufacturing process A helix-type delay line borne by a conical surface. The internal surface of a sleeve has grooves into which are inserted dielectric supports of constant height that are affixed to the helix-type delay line, and the depth of the grooves increases with the ...	02/25/1986
4546332	Variable delay line A variable delay line is disclosed which comprises an electromagnetic delay line formed of an inductance element and capacitors, a conductive plate disposed along the electromagnetic delay line and opposed thereto, and a movable contact adapted to move al...	10/08/1985
4465987	Ring-bar slow wave structure and fabrication method A tubular ring-bar slow wave structure is provided. The structure includes a plurality of axially spaced, coaxially aligned, generally parallel metallic rings connected by a plurality of generally axially parallel, alternately spaced metallic bars. The st...	08/14/1984
4459562	Dielectric based submillimeter backward wave oscillator circuit A ladder circuit especially useful in backward wave oscillators operating in the 500 GHz to 2,000 GHz range comprises a waveguide (10) having disposed therein transversely oriented slabs (16) which contact an upper wall (22) of waveguide (10). The edges o...	07/10/1984
4422012	Ladder supported ring bar circuit An improved slow wave circuit especially useful in backward wave oscillators includes a slow wave circuit (10) in a waveguide (12) as shown in FIG. 1. The slow wave circuit is comprised of rings 11 disposed between and attached to respective stubs (13,14)...	12/20/1983
4349791	Slow wave coupling circuit A system of slow wave structures for coupling a first electromagnetic circuit to a second electromagnetic circuit includes an inner slow wave structure and an outer slow wave structure concentric with the inner structure. The outer structure is configured...	09/14/1982
4313474	Method for the manufacture of a microwave delay line and microwave delay line obtained by this method The present invention relates to a method for the manufacture of a hyperfrequency delay line. The method comprises using a single metal wire shaped by the coiling thereof, said operation comprising bringing the wire into the form of contiguous coils. Coil...	02/02/1982
4311991	Acoustic transmission member An acoustic transmission member is disclosed for use in an encoding system utilizing acoustic energy wherein diverging sound waves are induced within the member in response to selected actuation of a striker positioned along the member. The time taken by ...	01/19/1982
4308621	Radio interference bucker apparatus An apparatus for intercepting radio waves emitted from a relatively local interference radio-wave-emitting source and processing the same so that they may be fed into the antenna terminal of a radio wave receiver for accomplishing substantially interferen...	12/29/1981
4263532	Microwave delay line A microwave delay line, which has a periodic geometrical structure involving more particularly the repetition of first and second meshes so that the amplitude of the inverse mode of transmission is reduced compared with that of a helical line, which compr...	04/21/1981
4178533	Microwave delay line for travelling wave tube An helical type line for travelling wave tube, with a variable diamter. The line is made on a skew surface constituted by a revolution surface on which flat surfaces have been made. The variation of the line diameter may be carried out by a variation of t...	12/11/1979
4162464	Delay line Two groups of conductors are wound helically with opposite pitch around a core and are further intertwined to establish a mesh, braid or plait. The conductors of each group are interconnected to establish the signal line and the return path for the delay ...	07/24/1979
4115721	Traveling wave device with unific composite metal dielectric helix and method for forming A traveling wave device having a metallic helical core element which is ceramic coated on its peripheral surfaces to provide a heat transferring dielectric and which is in intimate peripheral contact within the body of said device, to thus provide a simpl...	09/19/1978

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Class 333/162 - Helical line structures and lines developed from a helical structure