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123 results about "Open stub" patented technology
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Compact wideband dual polarized dipole
InactiveUS20170062940A1Simultaneous aerial operationsRadiating elements structural formsMulti bandDipole antenna
A compact wideband dual polarized dipole antenna assembly using a meander line component. The antenna assembly includes a pair of open stub baluns with a radiating dual polarized top printed circuit board (PCB) that is perpendicular to the baluns. The radiating dual polarized top PCB includes the meander line component. The compact dipole solution, through the use of the meander line component, may be employed in more complex multi-band products resulting in a reduction in metal required and does not compromise in performance during multi-band operation. The compact wideband dual polarized dipole antenna assembly covers all known radio frequency bands in, for example, the mobile base station industry to date.
Owner:AMPHENOL CORP
Multilayer printed circuit board for high-speed differential signal, communication apparatus, and data storage apparatus
InactiveUS7448880B2Degree of coupling between differential signal transmission lines is decreasedJitter is accordingly decreasedRotary current collectorSemiconductor/solid-state device detailsCouplingDifferential signaling
In the case where high speed differential signals are transmitted in differential transmission lines through via holes with open-stubs, signal waveforms are distorted due to impedance mismatch in the open-stubs of the via holes, thus causing jitter, which has become an issue of high speed signals. For differential transmission lines that pass through via holes with open-stubs, a degree of coupling of the lines is decreased while the differential characteristic impedance is made constant. Thereby, the effects of backward cross talk noise caused by the coupling can be minimized, and thus jitter can be suppressed.
Owner:HITACHI LTD
Antenna structure and communication apparatus including the same
InactiveUS7382319B2Easy to implementAvoiding reduction in an antenna gainSimultaneous aerial operationsAntenna supports/mountingsCapacitanceElectromagnetic coupling
In an antenna structure including a feeding radiation electrode and a non-feeding radiation electrode that are electromagnetically coupled to each other, due to formation of a main slit, the feeding radiation electrode includes a U-turn portion in the middle of a path circumventing the main slit from a feeding end to an open end. A sub-slit for forming an open stub that is connected to the U-turn portion and that provides the U-turn portion with electrostatic capacitance is formed in the feeding radiation electrode. By changing a value of the electrostatic capacitance to be provided by the open stub to the U-turn portion of the feeding radiation electrode, variable control of a higher-order resonant frequency F2 of the feeding radiation electrode 2 can be achieved while suppressing fluctuations in a resonant state (for example, a fundamental resonant frequency F1 and a Q-value) of a fundamental resonant frequency band of the feeding radiation electrode, in an electromagnetic coupling state between the feeding radiation electrode and the non-feeding radiation electrode, and in an impedance matching state.
Owner:MURATA MFG CO LTD
Compact microstrip hybrid coupled input multiplexer
A multiplexer includes a filter channelizer having at least two output filters, each output filter being coupled with a respective hybrid coupler. The multiplexer channelizes an input radio frequency (RF) band of electromagnetic energy into a set of output ports. Each hybrid coupler includes an input port (port 1), two output ports and an isolated port (port 4). Each output filter is coupled to a first one of the two output ports of a respective hybrid coupler, a second one of the two output ports being connected to an open stub microstrip transmission line. The respective hybrid coupler is coupled in a daisy chain, by way of port 1 and port 4, with one or more of the input of the multiplexer, and at least one other hybrid coupler. Advantageously, each output channel may include no more than one filter and no more than one hybrid coupler.
Owner:MAXAR SPACE LLC
Cascode circuit
InactiveUS7714664B2Amplifier combinationsAmplifier modifications to reduce detrimental impedenceCascodeEngineering
Owner:MITSUBISHI ELECTRIC CORP
Structure of transmission line for data communication and method for designing the same
InactiveUS20120235764A1Increase reflectionLow costMultiple-port networksOne-port networksData signalImpedance matching
Disclosed is a structure for impedance matching by applying a CPW structure to an impedance discontinuous portion on a data signal line or using a micro-strip open stub so as to be used for high-speed transmission by a flexible PCB. According to the present invention, it is possible to fabricate a flexible PCB capable of performing low-priced and high-speed transmission.
Owner:ELECTRONICS & TELECOMM RES INST
Antenna structure and communication apparatus including the same
InactiveUS20070115177A1Easy to implementAvoiding reduction in an antenna gainSimultaneous aerial operationsAntenna supports/mountingsCapacitanceElectromagnetic coupling
In an antenna structure including a feeding radiation electrode and a non-feeding radiation electrode that are electromagnetically coupled to each other, due to formation of a main slit, the feeding radiation electrode includes a U-turn portion in the middle of a path circumventing the main slit from a feeding end to an open end. A sub-slit for forming an open stub that is connected to the U-turn portion and that provides the U-turn portion with electrostatic capacitance is formed in the feeding radiation electrode. By changing a value of the electrostatic capacitance to be provided by the open stub to the U-turn portion of the feeding radiation electrode, variable control of a higher-order resonant frequency F2 of the feeding radiation electrode 2 can be achieved while suppressing fluctuations in a resonant state (for example, a fundamental resonant frequency F1 and a Q-value) of a fundamental resonant frequency band of the feeding radiation electrode, in an electromagnetic coupling state between the feeding radiation electrode and the non-feeding radiation electrode, and in an impedance matching state.
Owner:MURATA MFG CO LTD
Coupled-fed antenna device
InactiveUS20070257842A1Simple designLow costSimultaneous aerial operationsAntenna supports/mountingsElectrical conductorCoupling
A coupled-fed antenna device comprising a substrate, a signal source, a ground plane, a radiation conductor, and a coupling feedline is disclosed. The substrate has at least a first surface and a second surface, and the signal source is disposed on the first surface. The ground plane is electrically grounded and covers at least partial area on the second surface of substrate. The radiation conductor is disposed on the second surface of substrate and connected to the ground plane. The coupling feedline consists of a first feedline connected to the signal source and a second feedline connected to the radiation conductor. The real part of the antenna input impedance may be adjusted by shifting the attachment point between the second feedline and radiation conductor. The first feedline and the second feedline are coupled together by a coupling element. The imaginary part of the antenna input impedance may be adjusted by changing the input impedance of an open stub of the coupling element.
Owner:AIPTEK INTERNATIONAL INC
Non-dispersive UWB antenna apparatus using multi-resonance, and method for manufacturing the same
InactiveUS20090174608A1Reduce dispersionSimultaneous aerial operationsRadiating elements structural formsResonanceDielectric substrate
Provided is a non-dispersive UWB antenna using multi-resonance, which can obtain a UWB characteristic by combining a monopole radiation patch and stepped open stubs, and can obtain an improved non-dispersion characteristic by using a symmetrical structure of the monopole radiation patch and the stepped open stubs. The non-dispersive UWB antenna includes a dielectric substrate, a monopole radiation patch disposed in the center of the top surface of the dielectric substrate, stepped open stubs connected to the monopole radiation patch to induce multi-resonance, a CPW ground plane, and a CPW feed line connected to the monopole radiation patch. By using the monopole radiation patch, the stepped open stubs, and the CPW feed line, the non-dispersive UWB antenna can obtain the omni-directional radiation pattern in the frequency range (3.1-4.9 GHz) required by the system.
Owner:ELECTRONICS & TELECOMM RES INST
Split wave compensation for open stubs
In accordance with a first embodiment, the present invention provides a circuit substrate comprising a first surface; a second surface; a first via having a first end near said first surface and a second end near said second surface; a second via having a first end near said first surface and a second end near said second surface; a first conductive element electrically coupling said first end of said first via and said first end of said second via; a second conductive element electrically coupling said second end of said first via and said second end of said second via; an input signal line coupled to said first via; and an output signal line coupled to said second via.
Owner:FLEXTRONICS AP LLC
Via structure having open stub and printed circuit board having the same
ActiveUS20140077896A1Loss loss characteristicsTransmission loss lossMultiple-port networksPrinted circuit aspectsGround patternShunt capacitance
The present invention relates to a via structure having an open stub and a printed circuit board having the same. In accordance with an embodiment of the present invention, a via structure having an open stub including: a signal transmission via passing through an insulating layer; upper and lower via pads for connecting first and second transmission lines, which are respectively formed on and under the insulating layer, and the signal transmission via; and at least one open stub connected to an outer periphery of each via pad to have a shunt capacitance with each ground pattern formed on and under the insulating layer is provided. Further, a printed circuit board with a via having an open stub is provided.
Owner:SAMSUNG ELECTRO MECHANICS CO LTD
Directional coupler and directional coupling method
The input terminal 101 is connected to the output terminal 102 via an open stub 107 , a main line 105 , an open stub 108 . The coupling terminal 103 is connected to the isolation terminal 104 through the sub-line 106 electromagnetically coupled with the main line 105 . Open stub 107 and open stub 108 have a stub length corresponding to 1 / 4 wavelength at the desired cutoff frequency. Thereby, even in the microwave to millimeter wave frequency band, it is possible to provide a directional coupler and a directional coupling method that are small in size, low in loss, and have good high-frequency spurious suppression characteristics.
Owner:PANASONIC CORP
Multiband antenna
ActiveUS20150311589A1Avoid spreadingImprove bandingSimultaneous aerial operationsAntenna detailsHigh frequency powerRadiating element
Two high frequency antennas are provided in a multilayer substrate. Each high frequency antenna is configured of a radiation element, a high frequency power supply line, and a high frequency power supply unit. A low frequency antenna is configured of a series radiation element, a low frequency power supply line, and a lower frequency power supply unit. The series radiation element is formed of two radiation elements connected by a radiation element connection line. One end side of the series radiation element is connected to the low frequency power supply unit via the low frequency power supply line. Open stubs to block transmission of a high frequency signal (SH) are connected to the radiation element connection line and the low frequency power supply line. Short stubs to block transmission of a low frequency signal (SL) are connected to the high frequency power supply lines.
Owner:MURATA MFG CO LTD
Wireless LAN antenna and wireless LAN card with the same
InactiveUS6965346B2Adjustable resonance frequencyEasy to changeSimultaneous aerial operationsAntenna supports/mountingsLow frequency bandWireless lan
A wireless LAN antenna / card which can transmit / receive RF signals in a high frequency band (e.g., 5 GHz) and a low frequency band (e.g., 2.4 GHz), includes a radiation electrode, a matching electrode and a feeding electrode. The radiation electrode has a predetermined area to define a transmission / reception frequency band of the antenna. The matching electrode has at least one open stub. The feeding electrode has a feeding point formed at an arbitrary position of the feeding electrode to receive a current, a first end connected to the radiation electrode, and a second end connected to the matching electrode. Further, the feeding point and a ground point are arbitrarily set on the feeding electrode, thus adjusting the impedance and frequency of the wireless LAN antenna.
Owner:SAMSUNG ELECTRO MECHANICS CO LTD
Printed circuit board
A printed circuit board includes a number of signal layers, a number of ground layers, a first transmission line, a second transmission line, a first via, and a second via. The first transmission is located on one of the number of signal layers. The second transmission line is located on another of the number of signal layers. The first and second vias pass through the printed circuit board. The first via is electrically coupled to the first and second transmission lines, and is isolated from the number of ground layers. The second via is electrically coupled to one or more of the number of ground layers, and is isolated from the other of the number of ground layers to increase an inductance, thus compensating capacitive nature of an open stub and improving signal integrity.
Owner:CLOUD NETWORK TECH SINGAPORE PTE LTD
Filter
ActiveUS20050253671A1Simple structureHigh degree of freedom in designResonatorsWaveguidesLength waveOpen stub
A filter includes first and second line patterns each having a length substantially equal to ½ of the wavelength of a pass-band frequency, and a resonator that is interposed between the first and second line patterns and is coupled therewith so that the first and second line patterns have open stubs in which connection points between input / output terminals and the first and second line patterns appear to be short-circuited when viewed from ends of the first and second line patterns.
Owner:EUDYNA DEVICES INC
Filter
ActiveUS7276995B2Simple structureHigh degree of freedom in designResonatorsWaveguidesEngineeringLength wave
A filter includes first and second line patterns each having a length substantially equal to ½ of the wavelength of a pass-band frequency, and a resonator that is interposed between the first and second line patterns and is coupled therewith so that the first and second line patterns have open stubs in which connection points between input / output terminals and the first and second line patterns appear to be short-circuited when viewed from ends of the first and second line patterns.
Owner:EUDYNA DEVICES INC
Dielectric antenna
InactiveUS6946994B2Frequency bandwidth through whichObtain goodSimultaneous aerial operationsAntenna supports/mountingsDielectricElectrical conductor
Owner:TAIYO YUDEN KK
Multi-band high-efficiency doherty amplifier
InactiveCN102893517APower amplifiersAmplifier modifications to raise efficiencyMulti bandAudio power amplifier
The present invention relates to a Multi-Band Doherty amplifier. Embodiments of the present invention provide an amplifying structure including a main amplifier configured to amplify a first signal, a peak amplifier configured to amplify a second signal, a tunable impedance inverter configured to perform impedance inversion to modulate a load impedance of the main amplifier, and a combining node configured to receive the amplified second signal from the peak amplifier and an output of the tunable impedance inverter. The tunable impedance inverter includes a tuner configured to tune the impedance inversion over at least one broad frequency band. The tuner is (i) at least one capacitor, (i) at least one varactor, or (ii) at least one open stub shunted by a diode.
Owner:PROVENANCE ASSET GRP LLC
Cascode circuit
InactiveCN101674053AHigh gainHigh outputAmplifier modifications to reduce detrimental impedenceAmplifiers wit coupling networksAudio power amplifierCascode
Owner:MITSUBISHI ELECTRIC CORP
Filter-integrated even-harmonic mixer and hi-frequency radio communication device using the same
ActiveUS20050020231A1Easy constructionReduce circuit sizeModulation transference by distributed inductance and capacitanceTransmission noise suppressionBandpass filteringCommunication device
Configuration of a connection between an even-harmonic mixer and a filter is simplified, thereby enabling size reduction. An even-harmonic mixer (21) and a high-frequency bandpass filter (23) are connected to each other via a transmission line (22), thereby forming a filter-integrated even-harmonic mixer. The length of the transmission line (22) is set so that impedance on the transmission line side as viewed from a connection point (24) between the even-harmonic mixer (21) and the transmission line (22) is approximately 0 for a frequency fLO of a local oscillation signal. This allows elimination of an open stub which is used in a conventional even-harmonic mixer and of which the line length to provide equivalent grounding for the frequency fLO is about 1 mm. Thus, the connection portion between the even-harmonic mixer and the high-frequency bandpass filter is simplified and a compact circuit layout for the filter-integrated even-harmonic mixer is obtainable.
Owner:SHARP KK
Transition circuit
ActiveUS20070188258A1Reduce thicknessOne-port networksWaveguidesElectrical conductorDielectric substrate
A transition circuit includes: a waveguide having a notched portion formed by cutting away a portion of the tube wall of the waveguide from the end portion of the waveguide; a dielectric substrate in which a portion extending outside the waveguide through the notched portion of the waveguide is formed; a plurality of polygonal conductor patterns formed regularly disposed on the dielectric substrate; a ground conductor formed on the dielectric substrate; through holes electrically connecting this ground conductor and each of the conductor patterns; an open stub formed on the dielectric substrate; and the conductor of a microwave transmission line, which is formed on the portion of the dielectric substrate, extending outside the waveguide, and which is electrically connected to the open stub.
Owner:MITSUBISHI ELECTRIC CORP
Semiconductor device and adjusting method for semiconductor device
InactiveUS20060139131A1Prevent noise propagationReduce componentsMultiple-port networksElectrically conductive connectionsEngineeringPeak value
An object of the invention is to provide a semiconductor device and an adjusting method for a semiconductor device wherein power source noises and noises radiated as radio waves can be reduced and power source noises inside the semiconductor device can be cut. The open stub OS1 is formed in the upper wiring layer of the semiconductor device 1. The stub length L1 is set to a length of ¼ of the wavelength of the known frequency containing peak components of noises. The noise receiving part AT1 is disposed adjacent to the open stub OS1. The open stub OS1 is connected to the power source wiring 4 by an interlayer wiring 6. The noise receiving part AT1 is biased to a ground potential. The basic wave component and odd-number harmonic waves of noises that are generated from the PLL circuit 11 and propagate (the arrow Y1 of FIG. 2) in the power source wiring 4 are reflected (arrow Y2 of FIG. 2) by the open stub OS1 so as to return to the PLL circuit 11, and do not reach the filter circuit 12.
Owner:SOCIONEXT INC
Multilayer wiring board
InactiveUS20160066415A1Reduce decreaseSimple structureElectrically conductive connectionsCircuit arrangements on support structuresElectronic componentOpen stub
A multilayer wiring board includes an insulating layers stacked on one another, lands formed on an upper surface part of the multilayer wiring board, and a differential transmission line formed on or in each of the insulating layer. An electronic component is mounted on the lands. The differential transmission line is constituted of a pair of signal lines which extend from the lands toward a signal receiving end. Each of the signal lines is provided with an open stub which extends in a stacking direction of the insulating layers, and has a same width as a width of the signal lines, one end of the open stub being connected to a corresponding one of the signal lines, and another end of the open stub being open.
Owner:DENSO CORP +1
Harmonic suppression type stub matching network for dual-frequency amplifier
InactiveCN101789767ANovel structureSimple structureMultiple-port networksDual frequencyAudio power amplifier
The invention provides a micro-strip line matching network for a dual frequency-band RF (radio frequency) amplifier, which is used for a dual-frequency amplifier in the technical field of wireless communication. The matching network comprises a micro-strip TL (transmission line) 1, a micro-strip TL 2 and an OS (open stub). The invention aims at providing the matching network which is used for the RF amplifier and is suitable for wireless communication, so as not only to lead the amplifier to work on any two frequency bands at the same time, but also to improve the linear performance of the amplifier by utilizing the harmonic suppression of the matching network. The main characteristics of the matching network are as follows: by adopting the TL 1, the TL2 and the OS, the matching network has simple structure and small geometric dimension; by adopting the structure of the OS, the matching network can realize the function of harmonic suppression; in addition, by adopting a micro-strip line, the matching network is suitable for high-power application.
Owner:BEIJING UNIV OF POSTS & TELECOMM
Filter-integrated even-harmonic mixer and hi-frequency radio communication device using the same
ActiveUS7164902B2Easy constructionReduce circuit sizeModulation transference by distributed inductance and capacitanceTransmission noise suppressionBandpass filteringFrequency mixer
Configuration of a connection between an even-harmonic mixer and a filter is simplified, thereby enabling size reduction. An even-harmonic mixer and a high-frequency bandpass filter are connected to each other via a transmission line, thereby forming a filter-integrated even-harmonic mixer. The length of the transmission line is set so that impedance on the transmission line side as viewed from a connection point between the even-harmonic mixer and the transmission line is approximately 0 for a frequency fLO of a local oscillation signal. This allows elimination of an open stub which is used in a conventional even-harmonic mixer and of which the line length to provide equivalent grounding for the frequency fLO is about 1 mm. Thus, the connection portion between the even-harmonic mixer and the high-frequency bandpass filter is simplified and a compact circuit layout for the filter-integrated even-harmonic mixer is obtainable.
Owner:SHARP KK
Frequency selective low loss transmission line system
ActiveUS6882242B2Reduce decreaseOptimize their impedanceMultiple-port networksElectrically conductive connectionsCapacitanceElectrical conductor
A frequency selective low loss transmission system for communicating a signal using a coaxial cable of one impedance to a device of different impedance. A connector with a matching transformer is integral to the connector which terminates with a standard interface. The invention also includes a coupling mechanism to couple the coaxial cable with the connector. The invention can also include series open stub conductors for capacitive coupling to the conductors of the coaxial cable. In addition to low losses over a broad frequency range, the connector facilitates connector installation due to the series open stub conductor while reducing cost and complexity of both coaxial cable and connector.
Owner:NOKIA SOLUTIONS & NETWORKS OY
Wireless LAN antenna and wireless LAN card having said antenna
InactiveCN1508907AEasy to adjustMeet the antenna characteristicsSimultaneous aerial operationsAntenna supports/mountingsLow frequency bandEngineering
The present invention relates to a wireless LAN antenna and wireless LAN card, which can transmit / receive RF signals in a high frequency band (5 GHz) and a low frequency band (2.4 GHz) required in the wireless LAN. The wireless LAN antenna of the present invention includes a radiation electrode, a matching electrode and a feeding electrode. The radiation electrode has a predetermined area to determine a transmission / reception frequency band of the antenna. The matching electrode has at least one open stub. The feeding electrode has a feeding point formed at an arbitrary position of the feeding electrode to receive a current, with a first end connected to the radiation electrode and a second end connected to the matching electrode. Further, the feeding point and a ground point are arbitrarily set on the feeding electrode, thus adjusting the impedance and frequency of the wireless LAN antenna.
Owner:SAMSUNG ELECTRO MECHANICS CO LTD
Multi band built-in antenna
ActiveUS20100149069A1Easy to adjustAntenna structure is simpleSimultaneous aerial operationsAntenna supports/mountingsMulti bandDielectric
A multi-band built-in antenna for a mobile communication terminal having a main board and a casing for protecting the main board, is disclosed. A transmission line is formed to be spaced apart from one outside surface of the main board by a predetermined interval and configured to include an external conductor, a dielectric, and a central conductor so as to transmit signals. A ground clip is configured to ground the transmission line by fastening the transmission line. A radiator is formed by bending the dielectric and central conductor of the transmission line, other than the external conductor of the transmission line, and is configured to operate in multiple bands. An open stub is connected to the ground clip, is bent a plurality of times, and is configured to be operated in a low frequency band, which is lower than the high frequency band.
Owner:ACE ANTENNA
Printed wiring board and method of producing the same
ActiveCN105657957AReduce high frequency noise currentCross-talk/noise/interference reductionPrinted circuit aspectsEngineeringDigital electronics
A printed wiring board includes a digital circuit, an analog circuit, and a power supply path that is disposed on an insulating layer between the digital circuit and the analog circuit. A plurality of open stub EBG structures are disposed at an end of a bridge section in a power supply plane. The open stub EBG structure is an open stub state whose one end is connected to the power supply path and other end is in an open state.
Owner:UNIV OKAYAMA +1
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