Abstract: The present application is related to a detection device and method for coronavirus and influenza virus. The device comprises a detection module (20), a signal processing circuit (30), a controller (40), a displayer (50), a digital-to-analog conversion circuit (60), and a clock (70). Noticeably, the detection module (20) comprises a sample cell, and a transistor sensor combination integrated in the sample cell and used for measuring different targets. The detection module (20) may comprise a sample cell array to realize simultaneous detection of a plurality of samples to be detected. The detection method comprises the following steps: adding a sample to be detected into a sample cell, reading an electrical signal response of each transistor sensor in the sample cell to judge whether the sample to be detected contains a virus to be detected or not. The present application belongs to the technical field of biological detection.

Abstract: The present application is related to a detection device and method for coronavirus and influenza virus. The device comprises a detection module (20), a signal processing circuit (30), a controller (40), a displayer (50), a digital-to-analog conversion circuit (60), and a clock (70). Noticeably, the detection module (20) comprises a sample cell, and a transistor sensor combination integrated in the sample cell and used for measuring different targets. The detection module (20) may comprise a sample cell array to realize simultaneous detection of a plurality of samples to be detected. The detection method comprises the following steps: adding a sample to be detected into a sample cell, reading an electrical signal response of each transistor sensor in the sample cell to judge whether the sample to be detected contains a virus to be detected or not. The present application belongs to the technical field of biological detection.

Abstract: Radio frequency antennas sharing a ground plane are largely decoupled using one or more lumped capacitive elements set into holes within the ground plane. The holes, which are precisely placed, can extend to a side of the ground plane. A stub extends from a fringe of the hole either straight or bending in an L shape, and a capacitor connects between an end of the stub and another side of the hole. Capacitive elements can also be supported on raised solder pads above a ground plane or off to one side of the ground plane. Methods for manufacturing the decoupling apparatus are described.

Abstract: A magnetic current dipole feeding structure for patch and dielectric resonator antennas is disclosed in which a wire coil helix is placed above the ground plane and below the patch or top of the dielectric resonator block, the coil having half wound in a right-hand orientation and another half in a left-hand orientation, meeting at a common point in the middle. One end of the double torsion coil can be excited with radio frequency (RF) signals, and the other can be grounded on the ground plane. Some embodiments have the other end fed by an equal signal. These double torsion coils can be used in pairs to provide differential feeding to the patch or dielectric resonator, and pairs placed orthogonally to a first pair can be used for another polarization.

Abstract: A magnetic current dipole feeding structure for patch and dielectric resonator antennas is disclosed in which a wire coil helix is placed above the ground plane and below the patch or top of the dielectric resonator block, the coil having half wound in a right-hand orientation and another half in a left-hand orientation, meeting at a common point in the middle. One end of the double torsion coil can be excited with radio frequency (RF) signals, and the other can be grounded on the ground plane. Some embodiments have the other end fed by an equal signal. These double torsion coils can be used in pairs to provide differential feeding to the patch or dielectric resonator, and pairs placed orthogonally to a first pair can be used for another polarization.

Abstract: Radio frequency antennas sharing a ground plane are largely decoupled using one or more lumped capacitive elements set into holes within the ground plane. The holes, which are precisely placed, can extend to a side of the ground plane. A stub extends from a fringe of the hole either straight or bending in an L shape, and a capacitor connects between an end of the stub and another side of the hole. Capacitive elements can also be supported on raised solder pads above a ground plane or off to one side of the ground plane. Methods for manufacturing the decoupling apparatus are described.

Abstract: The disclosure provides antenna assemblies and methods for reducing mutual coupling of coupled antennas. According to an embodiment, the antenna assembly, comprises: a first antenna; and a second antenna coupled with the first antenna; wherein a first capacitive load is provided to the first antenna at a first position of the first antenna so that a mutual coupling between the first antenna and the second antenna is reduced. According to the present disclosure, at least some of the following advantages may be achieved: 1) no any component that connects or structure between coupled antennas is required; 2) the capacitive load is very little frequency dependent so that the method is highly suitable for antenna decoupling at low frequencies; 3) the required capacitive load takes almost no space in the circuit layout; and 4) the load does not noticeably change antenna radiation patterns.

Abstract: The disclosure provides antenna assemblies and methods for reducing mutual coupling of coupled antennas. According to an embodiment, the antenna assembly, comprises: a first antenna; and a second antenna coupled with the first antenna; wherein a first capacitive load is provided to the first antenna at a first position of the first antenna so that a mutual coupling between the first antenna and the second antenna is reduced. According to the present disclosure, at least some of the following advantages may be achieved: 1) no any component that connects or structure between coupled antennas is required; 2) the capacitive load is very little frequency dependent so that the method is highly suitable for antenna decoupling at low frequencies; 3) the required capacitive load takes almost no space in the circuit layout; and 4) the load does not noticeably change antenna radiation patterns.

Abstract: Disclosed is an air-filled patch antenna, comprising: a ground plane; a patch arranged to be in parallel to the ground plane; four inherent metal legs extending from the patch perpendicularly, wherein each of distal ends of the four legs is electrically and mechanically connected to the ground plane; and a feeding structure configured to provide a signal interface to the antenna.

Abstract: Disclosed is an air-filled patch antenna, comprising: a ground plane; a patch arranged to be in parallel to the ground plane; four inherent metal legs extending from the patch perpendicularly, wherein each of distal ends of the four legs is electrically and mechanically connected to the ground plane; and a feeding structure configured to provide a signal interface to the antenna.

Abstract: Disclosed is an apparatus for decoupling two antennas in an antenna array, in which the two antennas transmit and receive signals via a first input/output port and a second input/output port of the apparatus. The device may comprise a first adjusting device connected between a first antenna of the two antennas and the first input/output port, a second adjusting device connected between a second antenna of the two antennas and the second input/output port, and one or more decoupling networks connected between the first input/output port and the second input/output port. The first adjusting device and the second adjusting device are configured to have admittance adjustable to compensate an admittance of the decoupling networks such that an isolation coefficient between the two input/output ports approaches zero as well as reflection coefficients of each input/output port are minimized.

Abstract: Devices and methods for reducing interference between closely collocated antennas working at the same or adjacent frequencies are disclosed. According to one embodiment, the antenna array comprises a plurality of antennas for transmitting signals from and receiving signals to a plurality of transceivers respectively, and the device comprises a plurality of resonators; a first set of ports, each of which is connected to a respective one of the plurality of transceivers; and a second set of ports, each of which is connected to a respective one of the plurality of antennas; wherein each of the transceivers and the antennas is connected to a respective one of the resonators, and coupling coefficients among the resonators as well as a resonance frequency of each of the resonators are configured so that a desired isolation among the first set of ports and a desired matching at each of the first set of ports are obtained.

Abstract: Disclosed is an apparatus for decoupling two antennas in an antenna array, in which the two antennas transmit and receive signals via a first input/output port and a second input/output port of the apparatus. The device may comprise a first adjusting device connected between a first antenna of the two antennas and the first input/output port, a second adjusting device connected between a second antenna of the two antennas and the second input/output port, and one or more decoupling networks connected between the first input/output port and the second input/output port. The first adjusting device and the second adjusting device are configured to have admittance adjustable to compensate an admittance of the decoupling networks such that an isolation coefficient between the two input/output ports approaches zero as well as reflection coefficients of each input/output port are minimized.

Abstract: Devices and methods for reducing interference between closely collocated antennas working at the same or adjacent frequencies are disclosed. According to one embodiment, the antenna array comprises a plurality of antennas for transmitting signals from and receiving signals to a plurality of transceivers respectively, and the device comprises a plurality of resonators; a first set of ports, each of which is connected to a respective one of the plurality of transceivers; and a second set of ports, each of which is connected to a respective one of the plurality of antennas; wherein each of the transceivers and the antennas is connected to a respective one of the resonators, and coupling coefficients among the resonators as well as a resonance frequency of each of the resonators are configured so that a desired isolation among the first set of ports and a desired matching at each of the first set of ports are obtained.

Abstract: An efficient and cost-effective method for treating carbon nanotubes (CNTs) is provided. The method includes comprising: dispersing said carbon nanotubes in a dispersing medium to prepare a dispersion system; mixing said dispersion system with adsorbent so that type-specific carbon nanotubes contained in said dispersion system are absorbed onto the adsorbent, wherein the adsorbent is modified by a chemical/biological modifier so as to have different adsorption selectivity to carbon nanotubes of different types; and separating the adsorbent from the dispersion system, whereby the type-specific carbon nanotubes adsorbed onto the adsorbent is separated from the carbon nanotubes of another type enriched in the dispersion system; carbon nanotubes produced by the treatment method, and CNTs devices comprising thereof.

Abstract: Carbon nanotubes, a method for preparing the same and an element using the same are provided. The method for preparing carbon nanotubes includes synthesizing carbon nanotubes from carbon source using an arc-discharge method in the presence of catalysts and promoter, wherein the promoter contains an element capable of reducing the surface energy of carbon nanotubes. Carbon nanotubes with high purity and narrow diameter distribution can thus be prepared.

Abstract: A method for treating carbon nanotubes is provided. In the method for treating carbon nanotubes (CNTs), the CNTs are treated with SO3 gas at an elevated temperature, for example, at a temperature in the range of 385° C. to 475° C.

Abstract: A process of a preparing transparent conductive carbon nanotube (CNT) film, the carbon nanotube film prepared by the process, and carbon nanotube elements including the carbon nanotube film are provided. The carbon nanotube film has a higher transparency and much lower sheet resistance compared with the carbon nanotube film obtained by a conventional filtration process.

Abstract: A method of preparing carbon nanotubes (CNT), a method of purifying carbon nanotubes, carbon nanotubes, and an element using said carbon nanotubes are provided. The method includes preparing carbon nanotubes by arc-discharge and employs a coordination chemistry process to remove a catalyst and/or optional promoter used in arc-discharge.

Abstract: Carbon nanotubes, a method for preparing the same and an element using the same are provided. The method for preparing carbon nanotubes includes synthesizing carbon nanotubes from carbon source using an arc-discharge method in the presence of catalysts and promoter, wherein the promoter contains an element capable of reducing the surface energy of carbon nanotubes. Carbon nanotubes with high purity and narrow diameter distribution can thus be prepared.