17results about "Delay lines" patented technology

A system for efficiently generating or originating a tailored electromagnetic (EM) wave having a lower velocity than the speed of electromagnetic waves in free space includes a coaxial waveguide which extends linearly and a sinewave current generator. The coaxial waveguide includes a tubular outer body and a tailored emitting antenna disposed coaxially within the tubular outer body. The tubular outer body is formed of a first conductive material and defines a space therein which may be maintained as vacuum. The tailored emitting antenna is constructed physically and electrically by at least three phase-shifted sub-antennas connected in series, each of the sub-antennas being formed of a second conductive material which is less conductive than the first conductive material. The sinewave current generator generates multiple phase-shifted sinewave currents which are respectively input to the sub-antennas.

The present invention relates to a phase shifter having low loss in broadband, and a wireless communication device comprising same. The wireless communication device according to one embodiment comprises: a wireless communication module; a first antenna; a first transmission line for allowing the transmission of a signal between the wireless communication module and the first antenna; and a phase shifting element arranged in series on the first transmission line, wherein the phase shifting element is stacked in the vertical direction and can include a plurality of resonant unit elements electrically connected in parallel to one another.

The application discloses a kind of transmission circuit of negative group delay SSPP suitable for X waveband and control method thereof, belong to microwave engineering technical field, the transmission circuit includes: SSPP transmission line and nested double-ring resonator being arranged in the same side of dielectric substrate;SSPP transmission line is used to provide the slow-wave dispersion characteristic of passband edge;Nested double-ring resonator is laterally coupled with SSPP transmission line, including outer ring resonator and inner ring resonator, for resonant coupling;First coupling gap is formed between the outer ring resonator and SSPP transmission line;The inner ring resonator is nested in the inside of outer ring resonator, and second coupling gap is formed between the inner ring resonator and outer ring resonator;Wherein, the size parameters of the outer ring resonator, inner ring resonator, first coupling gap and second coupling gap are set according to the generation requirement of X waveband negative group delay response and impedance matching requirement, can generate negative group delay effect in high frequency band while still maintaining good impedance matching.

A slow-wave structure, a traveling-wave tube, and a communication apparatus are provided. The slow-wave structure includes a tube housing, a slow-wave line, and a plurality of support portions. The slow-wave line and the plurality of support portions are all located inside the tube housing, and the tube housing, the slow-wave line, and the plurality of support portions are integrally connected. The plurality of support portions are sequentially spaced apart along the slow-wave line. One end of each support portion is connected to the tube housing, and the other end is connected to the slow-wave line. This application can address processing and assembly errors caused by a discrete design, and simplifies assembly, thereby shortening an overall production cycle of the traveling-wave tube, and improving yields and consistency of the traveling-wave tube.

A slow-wave structure, a traveling-wave tube, and a communication apparatus are provided. The slow-wave structure includes a tube housing, a slow-wave line, and a plurality of support portions. The slow-wave line and the plurality of support portions are all located inside the tube housing, and the tube housing, the slow-wave line, and the plurality of support portions are integrally connected. The plurality of support portions are sequentially spaced apart along the slow-wave line. One end of each support portion is connected to the tube housing, and the other end is connected to the slow-wave line.

The invention relates to a tunable phase-shifting device (1) for a radio wave signal, comprising a first electrode structure (2) and a second electrode structure (5), each arranged on dielectric substrate layers (4, 6). The first electrode structure (2) and the second electrode structure (5) form a signal line for the radio wave signal extending in a signal transmission direction (8). A tuning layer (9) made of a tunable dielectric material (10) is arranged between the first electrode structure (2) and the second electrode structure. The first electrode structure (2) has several resonator strip elements (11), each with a strip element length measured in the signal transmission direction (8), which form a bandpass filter for the radio wave signal. The second electrode structure (5) is configured as a defective ground structure.The invention relates to a phased array antenna and a plate-shaped surface element with one or two phased array antennas.

A slow-wave structure, a traveling-wave tube, and a communication apparatus are provided. The slow-wave structure includes a tube housing, a slow-wave line, and a plurality of support portions. The slow-wave line and the plurality of support portions are all located inside the tube housing, and the tube housing, the slow-wave line, and the plurality of support portions are integrally connected. The plurality of support portions are sequentially spaced apart along the slow-wave line. One end of each support portion is connected to the tube housing, and the other end is connected to the slow-wave line. This application can address processing and assembly errors caused by a discrete design, and simplifies assembly, thereby shortening an overall production cycle of the traveling-wave tube, and improving yields and consistency of the traveling-wave tube.

The invention discloses a negative group delay SSPP transmission circuit suitable for an X wave band and a control method thereof, and belongs to the technical field of microwave engineering. The transmission circuit comprises an SSPP transmission line and a nested double-ring resonator which are arranged on the same side of a dielectric substrate; the SSPP transmission line is used for providing a slow wave dispersion characteristic of a passband edge; the nested double-ring resonator is laterally coupled with the SSPP transmission line, comprises an outer ring resonator and an inner ring resonator, and is used for resonant coupling; a first coupling gap is formed between the outer ring resonator and the SSPP transmission line; the inner ring resonator is nested in the outer ring resonator, and a second coupling gap is formed between the inner ring resonator and the outer ring resonator; wherein the size parameters of the outer ring resonator, the inner ring resonator, the first coupling gap and the second coupling gap are set according to the generation requirement of the X-band negative group delay response and the impedance matching requirement, and good impedance matching can still be kept while the negative group delay effect is generated at the high frequency band.

An antenna array is electronically controlled by controlling the speed of transmission of RF signals in the feed lines of each radiator in the array. The speed of transmission is controlled using phase shifters that include a variable dielectric constant (VDC) material that causes the speed of transmission to vary. A control signal applied to the VDC material generates the required phase shift. The control signal is calculated in real time for each phase shifter for each control period to enable the main beam to track a target such as a satellite. The control signals are square wave signals and each control signal has a duty cycle or frequency that is specifically calculated to generate the required phase shift.

This slow wave transmission line comprises a signal conductor (2) and a ground conductor (3) that are disposed with an insulator (1) therebetween. The ground conductor (3) includes a plurality of slits (3a) that intersect the extension direction of the signal conductor (2). The distance of a contour line OL from one end to the other end in an intersecting direction intersecting the extension direction of the signal conductor (2) of the slits (3a) in the ground conductor (3) in which the slits (3a) are formed is longer than the distance of a straight line connecting one end and the other end in the intersecting direction.

A transmission line. The transmission line includes a reference electrode. The transmission line also includes a stripline. The stripline meanders within a plane. The stripline has a nonplanar profile when viewed along a direction parallel to the plane.

In some examples, a variable inductor device includes a first planar loop comprising a first planar face and a material that supports electromagnetic coupling and a second planar loop comprising a second planar face and a material that supports electromagnetic coupling. The first planar loop is separable from the second planar loop to vary the inductance of the variable inductance device. In some examples, the first and second planar faces overlapping each other in a closed configuration of the device.

A high-frequency semiconductor device comprising a high-frequency semiconductor chip, including a high-frequency connector for transmitting or receiving high-frequency signals, and a chip package covering at least a portion of the high-frequency semiconductor chip. The chip package includes a high-frequency connector area for transmitting or receiving high-frequency signals located outside the high-frequency semiconductor device. The chip package includes a coplanar delay waveguide coupled between the high-frequency connector and the high-frequency connector area.

A radio-frequency antenna comprises a radiating element comprising a plurality n of D-shaped arms, each extending in a respective radial direction relative to a centre of the radiating element and substantially equally spaced around the centre, such that the radiating element is rotationally symmetric.

The utility model discloses a miniaturized three-in-one LTCC (Low Temperature Co-Fired Ceramic) delay line, which comprises a metal line delay unit laminated body, a metal ground electrode laminated body, a port outer electrode and a grounding outer electrode, the metal wire delay unit laminated bodies are formed by printing metal delay line units on a ceramic substrate layer, the metal ground electrode laminated bodies are formed by printing metal ground electrodes on the ceramic substrate layer, and a preset number of metal wire delay unit laminated bodies and the same number of metal ground electrode laminated bodies are laminated in a staggered manner; the metal delay line units of the metal line delay unit laminated body are respectively connected with the port external electrodes, and the metal ground electrodes of the metal ground electrode laminated body are respectively connected with the ground external electrodes. Through the technical scheme of the utility model, different delay amount outputs are realized, the delay time is adjustable in a certain range, the volume and weight of the delay line are effectively reduced, the loss of the delay line layer is reduced, and the reliability of the delay line is improved.

A chirped all-pass group delay filter includes one or more layers of substrate and cascading coupled dispersive delay lines configured to cancel ripples, wherein the cascading coupled dispersive delay lines use a stripline configuration, thereby controlling phase offsets in each stage.