20 results about "Open stub" patented technology

A termination circuit includes a first open stub that includes multiple first straight portions and multiple first connection portions with which the adjacent first straight portions are connected and that is formed in a meander pattern, and a second open stub that includes multiple second straight portions and multiple second connection portions with which the adjacent second straight portions are connected and that is formed in a meander pattern. The first open stub and the second open stub are provided on different layers and are electrically connected to each other. The first open stub is provided so as to be overlapped with at least part of the second open stub in a plan view and an extending direction of the first straight portions is different from an extending direction of the second straight portions.

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.

Various embodiments provide systems, devices, and methods for an antenna assembly included in an integrated circuit (IC) package. The antenna assembly may be used for near field wireless communication such as package-to-package and / or chip-to-chip communication. The antenna assembly may include a feed plate (e.g., a top feed) that is capacitively coupled to a first via and a second via. The feed plate may further be capacitively coupled to a loading structure. The first via may be conductively coupled to a ground potential. In some embodiments, the antenna assembly may further include a stub structure (e.g., an open stub or a short stub) that is conductively coupled to the second via. An impedance matching network may be coupled between the feed plate and an IC die that communicates using the antenna assembly. Other embodiments may be described and claimed.

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 utility model discloses a low-profile multi-frequency micro base station antenna, and relates to the technical field of base station antennae, the low-profile multi-frequency micro base station antenna comprises a first frequency band module, a second frequency band module, a reflecting plate and a cover plate; the first frequency band module comprises a plurality of first radiation units, a first power distribution plate used for exciting the first radiation units and a parasitic unit, and the parasitic unit is provided with a first groove used for filtering to improve the isolation of the micro base station antenna; the second frequency band module comprises a plurality of second radiation units and a second power distribution plate used for exciting the second radiation units, the second power distribution plate comprises a second power divider corresponding to the second radiation units, and the second power divider is provided with an open-circuit branch structure used for filtering to improve the isolation degree of the micro base station antenna; the first frequency band module and the second frequency band module are accommodated through the reflecting plate and the cover plate. The isolation degree of the base station antenna is improved, and the overall efficiency of the base station antenna is improved.

The application relates to a long-delay low-loss wideband delay line of a lack of ground open-circuit branch coupling strip, and belongs to the field of microwave systems. The long-delay low-loss wideband delay line comprises a metal microstrip line layer, a dielectric layer and a metal ground layer which are sequentially connected from top to bottom; the metal microstrip line layer comprises a fork structure composed of a U-shaped main microstrip line, a first U-shaped open-circuit branch and a second U-shaped open-circuit branch; a coupling strip is added in the fork structure, the coupling strip is grounded through a metallized via, and a complementary defect ground of the open-circuit branch is designed at a non-coplanar metal ground. Two or more long-delay low-loss wideband delay lines are connected in series to form a cascade delay line. The application works in a sub-6 frequency band range, has a relative bandwidth of 31.6%, a maximum delay time of 1.3 ns and an average transmission loss of 0.5 dB; a cascade delay line formed by connecting four long-delay low-loss wideband delay lines in series has a maximum delay time of 7.4 ns and an average transmission loss of less than 2.6 dB. The application effectively solves the mutual coupling eddy current effect between adjacent transmission lines.

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.

A balanced line-unbalanced line converter includes a balanced-side line including a first transmission line having a first end portion as a first signal terminal and a second end portion short-circuited and a second transmission line having a first end portion as a second signal terminal and a second end portion short-circuited, an unbalanced-side line including a first transmission line portion having a first end portion as a third signal terminal and a second end portion as an open end, the first transmission line portion to constitute a first coupled line with the first transmission line and a second transmission line portion to constitute a second coupled line with the second transmission line, a first open stub connected to the first end portion of the second transmission line, and a second open stub connected to the unbalanced-side line, to constitute a third coupled line with the first open stub.

The embodiment of the present application relates to the technical field of filter, in particular to a kind of topology structure, band elimination filter and communication device, including input, output, first microstrip line, second microstrip line, third microstrip line, fourth microstrip line, fifth microstrip line, sixth microstrip line, seventh microstrip line, eighth microstrip line, first open stub, second open stub, third open stub, fourth open stub, fifth open stub and sixth open stub, first microstrip line and first open stub are connected to input, second microstrip line and second open stub are connected to output, first microstrip line, second microstrip line, third microstrip line and fourth microstrip line are connected together, fifth microstrip line, third microstrip line and sixth microstrip line are connected together. By the above mode, the embodiment of the present application can make that band elimination filter has the characteristic of high selectivity.

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.

The application discloses a kind of topology structure of high-selectivity wideband band-stop filter and filter, the topology structure includes vertical microstrip line, one end of vertical microstrip line is symmetrically connected with the one end of first horizontal open stub and the one end of second horizontal open stub, the other end of vertical microstrip line is symmetrically connected with the one end of first horizontal microstrip line and the one end of second horizontal microstrip line, the other end of first horizontal microstrip line is connected input end, the other end of second horizontal microstrip line is connected output end;First horizontal microstrip line and input end are also terminated with third horizontal microstrip line and first vertical open stub between, second horizontal microstrip line and output end are also terminated with fourth horizontal microstrip line and second vertical open stub between;Third horizontal microstrip line and fourth horizontal microstrip line are symmetrically distributed on both sides of vertical microstrip line, and first vertical open stub and second vertical open stub are symmetrically distributed on both sides of vertical microstrip line.The application solves the problems that the existing band-stop filter structure is complex, the selectivity is poor, and the stop band is narrow.

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.

The application discloses a kind of wideband delay lines based on comb-like substrate integrated waveguide, belong to microwave passive device and wideband delay line technical field.The delay line includes rectangular dielectric substrate (1), metal layer (2), input impedance matching structure (3), output impedance matching structure (4), multiple groups of periodic open stub (5) being attached to the both sides of upper surface metal layer, and periodic PBG slow wave unit (6) being loaded in upper metal layer.The application is set on the basis of comb-like substrate integrated waveguide structure periodic PBG slow wave unit, utilizes the slow wave characteristics of periodic PBG slow wave unit to realize delay function.Periodic PBG slow wave unit is located between two sides periodic open stub, and is equidistant, mirror image symmetry along the direction of propagation.The application can realize planar waveguide transmission and slow wave delay without relying on sidewall metallization via, and is suitable for true time delay beam forming network, phased array feed network and wideband radio frequency front end.

The application provides an open stub odd power divider circuit applied to WiFi, which is used for distributing signals from one port to multiple ports, and comprises a bottom signal input layer, a middle metal ground layer and an upper signal distribution layer, the middle metal ground layer is arranged between the bottom signal input layer and the upper signal distribution layer to realize the communication connection between the bottom signal input layer and the upper signal distribution layer; wherein the upper signal distribution layer comprises an open stub and a transmission line, the open stub is distributed in a ring shape, and the transmission line is folded and distributed in the ring of the open stub; the bottom signal input layer is used for transmitting input signals to the upper signal distribution layer to drive the power divider; and the upper signal distribution layer is used for dividing the input signals into several equal-amplitude output signals.

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.

The embodiment of the present application relates to the technical field of communication, and discloses a kind of topology, low-pass filter and communication device, and the topology includes input end, output end, first microstrip line, second microstrip line, third microstrip line, fourth microstrip line, fifth microstrip line, first open stub, second open stub, third open stub, fourth open stub and fifth open stub.The one end of fourth microstrip line is connected with the one end of first microstrip line, second microstrip line and fifth microstrip line, the other end of first microstrip line is connected with input end and the one end of first open stub, the other end of second microstrip line is connected with output end and the one end of third microstrip line, the other end of third microstrip line is connected with second open stub, the other end of fifth microstrip line is connected with fifth open stub, and the other end of fourth microstrip line is connected with the one end of third open stub and fourth open stub.The above structure is used to design low-pass filter, and has the advantages of simple structure, high selectivity, high isolation and wide stopband.