10 results about "Open stub" patented technology

The invention discloses a balanced broadband band-pass filter with a stacked structure. The balanced broadband band-pass filter comprises a first layer wafer and a second layer wafer which are vertically stacked, a coplanar waveguide structure is adopted in the lower layer RDL of the first layer of wafer to realize differential input and output ports and two sections of coplanar waveguide transmission lines; a coplanar waveguide structure is adopted in the upper-layer RDL of the second-layer wafer to realize a differential input / output port and two sections of coplanar waveguide transmission lines, and the coplanar waveguide structure and the coplanar waveguide structure of the first-layer wafer form a differential pair; a coplanar waveguide structure is adopted in the upper-layer RDL of the first-layer wafer or the lower-layer RDL of the second-layer wafer to realize two sections of open-circuit stubs; a coaxial TSV structure and a single-hole copper cylinder TSV are integrated in the first layer wafer and the second layer wafer, and the coaxial TSV structure is used for realizing a vertical TSV transmission line and is coupled with the coplanar waveguide transmission line to form a resonant cavity; the single-hole copper cylinder TSV provides grounding reference for the coplanar waveguide structure and the coaxial TSV structure. According to the invention, a high-performance filtering function can be realized in a limited space.

Housing for two duplexers installed in a dual polarized dual band antenna. The invention provides a housing for two frequency selective devices, comprising a split strip conductor arranged inside the housing, the split strip conductor forming a series section of a transmission line and an open stub in parallel to the series section, the housing comprising a piece of metal profile comprising two cavities; each cavity has a polygonal shape in cross section and comprises wide walls and narrow walls; the cavities comprise at least two regions in which the distance between the wide walls differs by at least 20% and one narrow wall is at least 20% shorter than the other narrow walls forming the cavity; the section of the split strip conductor forming the open stub is arranged in a region in which the distance between the wide walls is larger compared to the other regions; wherein the narrow walls comprise openings in which ends of the split strip conductor forming the ports of the frequency selective devices are arranged; wherein the cavities have a common wide wall comprising a step arranged at a boundary between regions having different distances between the wide walls of the regions.

A radio-frequency power amplifier circuit based on an asymmetric fishbone-shaped matching network, comprising a power amplifier transistor. An input end of the power amplifier transistor is connected to an input matching network, and an output end of the power amplifier transistor is connected to an output matching network; the input matching network and / or the output matching network is of an asymmetric fishbone-shaped structure; the asymmetric fishbone-shaped structure comprises backbone elements which are sequentially connected in series, and connecting points between adjacent backbone elements are connected to upper-row rib elements and lower-row rib elements; the upper-row rib elements and the lower-row rib elements are asymmetric; the upper-row rib elements and the lower-row rib elements are all configured as open stubs, and the upper-row rib elements or the lower-row rib elements are quarter-wavelength open stubs at a harmonic frequency; and the backbone elements and the rib elements are all matching network elements.

An electrical connector, a conductive terminal and a forming method of a conductive portion of the conductive terminal. The conductive portion of the conductive terminal includes two elastic arms elastically abutting against a metal pad of a circuit board. Each elastic arm includes a first arm portion and a second arm portion separated along an up-down direction. A contact portion is formed at a tail end of the second arm portion, which does not form an open stub. Each contact portion has a tearing surface, such that a distance between the two contact portions of the two elastic arms is minimized. The two contact portions of the two elastic arms are provided to be staggered along the front-rear direction, and the two tearing surfaces of the two elastic arms are staggered along a front-rear direction, thus preventing the two elastic arms from scratching and colliding with each other.

The invention relates to the technical field of microwave communication, and discloses a high in-band rejection broadband band elimination filter. The filter is based on a micro-strip resonator, and a micro-strip open-circuit branch knot is loaded in the middle of the micro-strip resonator to form an axial symmetry structure. The structure is divided into three groups of parts with the same characteristic impedance along a symmetry axis, and the working bandwidth and the in-band suppression level of the filter can be flexibly adjusted by independently adjusting the impedance ratio of each group. The structure is simple, narrow slits do not need to be machined, and the machining difficulty and cost are remarkably reduced. Compared with the prior art, about 90% of relative working bandwidth can be obtained while 40dB high in-band suppression is realized, and the problem that high in-band suppression and broadband performance are difficult to consider at the same time is effectively solved.

The application provides a microstrip filter, comprising: a microstrip line arranged on the surface of a dielectric plate; one end of a first microstrip line is connected with a signal input end, the other end is connected with a second microstrip line in parallel, the other end of the second microstrip line is connected with a fourth microstrip line in parallel, the second microstrip line constitutes a first resonator of a hairpin structure, a third microstrip line constitutes an open stub structure connected in parallel with the second microstrip line and the fourth microstrip line perpendicularly, the other end of a second resonator of a hairpin structure constituted by the fourth microstrip line is connected with a sixth microstrip line perpendicularly, a fifth microstrip line constitutes an open stub connected with the fourth microstrip line perpendicularly, one end of a seventh microstrip line is connected with the sixth microstrip line in parallel, and the other end is connected with a signal output end, so that the problem of impedance mismatching between the input end and the output end of the filter can be solved.

The invention discloses a polarization reconfigurable dual-frequency pulse source based on a self-oscillation antenna, which is composed of two layers of dielectric substrates, a first surface structure positioned on the upper surface of a first dielectric substrate, a second surface structure positioned on the lower surface of the first dielectric substrate, and a third surface structure positioned on the lower surface of a second dielectric substrate, the first surface structure comprises a patch antenna structure used for radiating 0-degree polarized signals; the second surface structure comprises a patch antenna structure used for radiating 90-degree polarized signals; the third surface structure comprises two self-oscillation networks and a polarization switching network, and each self-oscillation network is provided with a pair of symmetrical open-circuit stubs. According to the invention, dual-frequency-band simultaneous working can be realized, and dynamic polarization switching is realized. The method can be widely applied to the field of wireless energy transmission.

To provide a device configuration capable of suppressing an increase in the device scale even when the number of antenna elements constituting an array antenna becomes extremely large. [Solution] Stubs 32, 33 are formed on the left and right sides of a waveguide body 31 formed on a circuit board, and switches 51, 52 are provided for exclusively controlling these stubs 32, 33 so that one is an open stub with its tip open and the other is a short stub with its tip shorted. Also, a slot 34 is formed between the stubs 32, 33 of the waveguide body 31, and by using the switches 51, 52 to switch between the open stub and the short stub of the stubs 32, 33, two or more different types of excited electric or magnetic fields are generated in the slot 34, changing the direction of the antenna beam.

A UWB band pass filter that is formed by a circuit board. The circuit board includes a first dielectric layer made of a dielectric substrate, a filter structure made of electrically conductive material, on a first side of the first dielectric layer, a first ground layer made of electrically conductive material, on a second side of the first dielectric layer. The filter structure has an input terminal and an output terminal between which a line extends that includes multiple first line sections and second line sections, and wherein the filter structure has multiple stubs that are situated between the first line sections and that branch off from the second line sections. The first line sections and the stubs are situated in parallel. The longitudinal line of the middle first line sections is inserted, from which two open stubs that are rotationally symmetrical about the middle first line sections branch off.

The present invention provides a variable attenuator comprising: a transmission line having an open stub connected between an input and an output of the variable attenuator; a first switch connected between an input and a reference potential; and a second switch connected between the output and a reference potential.