131 results about "Loop antenna" patented technology

The invention relates to the technical field of quantum sensing and ocean detection, and discloses an ocean magnetic field sensor based on an NV color center and an ocean magnetic field measuring method.The sensor comprises a cylindrical pressure-resistant cabin, an optical platform arranged in the pressure-resistant cabin and a main control panel; a laser, a beam shaping unit, a dichroscope, a beam shaping lens group, an objective lens, a diamond NV color center chip, a plano-convex lens I, a band-pass filter and a photoelectric detector are mounted on the optical platform; two microstrip loop antennas are mounted on the outer side of the diamond NV color center chip; an FPGA + ARM dual-core processor, a digital lock-in amplifier and two microwave signal generators are installed on the main control board, and the microwave signal generators are connected with the microstrip loop antenna and achieve electromagnetic coupling with the diamond NV color center chip. The invention has the advantages of high sensitivity, good long-term stability and strong anti-interference capability, and provides a new generation of quantum sensing solution for applications such as ocean geomagnetic monitoring and underwater target identification.

The invention relates to the field of array signal processing, and particularly discloses a DOA joint estimation method based on a quaternion polarization sensitive array. Electromagnetic wave dual polarization components are captured through the orthogonal dipole and the loop antenna, and a quaternion observation matrix is constructed; calculating a quaternion covariance matrix by adopting a sliding window mechanism, and separating a signal / noise subspace by adopting quaternion singular value decomposition; and constructing a spatial spectrum function in combination with a quaternion steering vector, and realizing joint estimation of an azimuth angle and a pitch angle through two-dimensional search. According to the method, the unified characterization capability of quaternions on polarization-airspace information is fully utilized, and the DOA estimation precision and the anti-interference performance of the multi-polarization signal are remarkably improved.

This application describes mechanisms to manage closed-loop antenna selection for a wireless device. The wireless device transmits sounding reference signal (SRS) resources configured by a cellular wireless network in an SRS resource set and receive SRS indicator (SRI) values to indicate antennas for subsequent uplink transmission of one or more physical layer channels by the wireless device, including a physical uplink shared channel (PUSCH), a physical uplink control channel (PUCCH), and a physical random access channel (PRACH). The wireless device supplements the closed-loop antenna selection with an open-loop antenna selection and uses the open-loop antenna selection for non-PUSCH channels when a most recently SRI value can be considered stale. SRI-based closed-loop antenna selection is extended to frequency division duplexing (FDD) bands. Transmit precoding matrix indicator (TPMI) group values are also used to indicate differential transmit power capabilities of various antennas of the wireless device to the cellular wireless network.

The utility model discloses a vehicle-mounted short-wave double-loop antenna lodging device, which comprises a case, a driving assembly, an antenna fixing platform and a rotating arm, the driving assembly is arranged in the case; the antenna fixing platform and the case are oppositely arranged, and the antenna fixing platform is provided with an antenna large-ring oscillator mounting interface, an antenna small-ring oscillator interface, an antenna supporting rod mounting interface, an antenna large-ring oscillator antenna adjustment connecting port and an antenna small-ring oscillator antenna adjustment connecting port; the antenna large-ring oscillator mounting interface is connected with the antenna large-ring oscillator antenna tuning connector; the antenna small ring oscillator interface is arranged at the center of the antenna support rod mounting interface and is connected with the antenna small ring oscillator antenna adjustment connector; and two ends of the rotating arm are respectively connected with the case and the side wall of the antenna fixing platform. According to the utility model, the installation height of the dual-ring antenna can be effectively reduced, so that the impact, vibration and wind resistance borne by the dual-ring antenna are reduced.

This invention provides an automatic tuner for a loop antenna used in shortwave communication, belonging to the field of shortwave communication technology. This tuner aims to solve the problems of existing automatic tuners for loop antennas, such as difficulty in balancing versatility and high power performance, and poor high-voltage withstand capability. The tuner includes: a matching circuit, which includes couplers for shunting forward and reverse radio frequency signals; a tuning actuator, which includes an oil-immersed variable capacitor and a drive mechanism; and a main control circuit. Based on the signal shunted by the coupler, the main control circuit autonomously calculates the standing wave ratio (VSWR) and generates a control signal to control the matching circuit and tuning actuator independently of the radio transceiver, thus completing automatic tuning. This invention improves voltage withstand and power handling capability by using an oil-immersed variable capacitor, and achieves universal tuning through the autonomous control of the main control circuit, overcoming the shortcomings of existing technologies and offering the advantages of high power, high reliability, and strong versatility.

A controllable electrical outlet may comprise a resonant loop antenna. The resonant loop antenna may comprise a feed loop electrically coupled to a radio-frequency (RF) communication circuit and a main loop magnetically coupled to the feed loop. The controllable electrical outlet may comprise one or more electrical receptacles configured to receive a plug of a plug-in electrical load and may be configured to control power delivered to the plug-in electrical load in response to an RF signal received via the RF communication circuit. The RF performance of the controllable electrical outlet may be substantially immune to devices plugged into the receptacles (e.g., plugs, power supplies, etc.) due to the operation of the resonant loop antenna. For example, degradation of the RF performance of the controllable electrical outlet may be less when the controllable electrical outlet includes the resonant loop antenna rather than other types of antennas.

To provide an antenna device capable of obtaining sufficient radiation characteristics even when arranged in a state of being close to a metal member, and a detection device.SOLUTION: The antenna device includes an annular substrate including a first surface, a second surface, and an opening penetrating between the first surface and the second surface, an annular antenna element provided on the first surface and surrounding the opening, a first feed line provided on the first surface and including a feed terminal connected to the antenna element, a second feed line provided on the second surface and including a connection terminal connected to a communication unit, the second feed line including an overlapping portion that overlaps a first portion of the first feed line in plan view, and a through hole that penetrates the substrate and connects the first feed line and the overlapping portion of the second feed line.SELECTED DRAWING: Figure 4

The packaging box comprises an upper shell body and a lower shell body, the rear side of the upper shell body and the rear side of the lower shell body are hinged together through a hinge, butterfly locks are arranged on the front side of the upper shell body and the front side of the lower shell body and used for fixing the upper shell body and the lower shell body together after the upper shell body and the lower shell body are closed, the lower shell body is filled with lower sponge, and the upper shell body and the lower shell body are connected through a hinge. A special-shaped groove, a circular groove and an L-shaped sinking groove are formed in the lower sponge. The packaging box has two use functions, can store the loop antenna, can replace a tripod to erect the loop antenna, can reduce the carrying difficulty during outdoor work, and meanwhile has the advantages of being simple in structure, low in machining cost, convenient to operate and the like.

The invention relates to the technical field of communication, in particular to a broadband radiation field generation and measurement system and a maximum shielding effectiveness estimation method. The system mainly comprises a transmitting end and a receiving end. The transmitting end is composed of a signal generator, a power amplifier and a monopole antenna, and the flexible deployment problem of the high-size monopole mooring antenna is solved by adopting an unmanned aerial vehicle air stretching mode; the receiving end is composed of an annular antenna, a low-noise amplifier and a spectrum analyzer, the spectrum analyzer is used for detecting low-frequency signal characteristics in the shielding body, the low-frequency signal characteristics are substituted into the maximum shielding effectiveness estimation method, and the maximum shielding effectiveness value is obtained through calculation. The system is flexible, detection and analysis of wide-range electromagnetic pulse signals can be achieved by adjusting the frequency of transmitted signals and replacing corresponding transmitting and receiving antenna types, and therefore the system can be widely applied to shielding effectiveness measurement.

An electronic device is provided, comprising: a housing having a first surface facing a first direction and a second surface facing a second direction opposite to the first direction. The electronic device further comprises: a conductive pattern having a first conductive coil whose axis is substantially perpendicular to either the first or the second direction. The electronic device further comprises: a communication circuit configured to cause the first conductive coil to generate magnetic flux. The second surface comprises a first region made of a conductive material and a second region made of a non-conductive material. When viewed from the second surface, the first conductive coil is substantially disposed below the first region. The first conductive coil is configured to include: a first portion disposed near or on the second region to allow the magnetic flux to pass through the second region.

In one embodiment, a method implemented by an electromagnetic imaging system for imaging material within a metal container, the method comprising: transmitting to. and receiving signals from, a plurality of antennas attached to an interior wall of the metal container, the signals delivered over a plurality of channels, each of the plurality of antennas comprising a ferrite loaded, shielded half-loop antenna; measuring a plurality of scattering parameters (S-parameters) for all of the plurality of channels; calibrating the measurements; and providing an image of the material using an inversion algorithm based on the calibrated measurements.

The embodiment of the invention provides an antenna structure and electronic equipment, the antenna structure comprises a first double-loop antenna unit and a second double-loop antenna unit, the first double-loop antenna unit comprises a first antenna and a second antenna, and the second antenna surrounds the first antenna; the second double-ring antenna unit comprises a third antenna and a fourth antenna, and the fourth antenna surrounds the third antenna; the surface of the first double-ring antenna unit is not in contact with the surface of the second double-ring antenna unit; the first double-loop antenna unit is electrically connected with the second double-loop antenna unit; the antenna structure is electrically connected with an electronic device used for arranging the antenna structure. By using the dual-ring antenna unit, the dual-frequency right-handed circular polarization of the antenna is realized, the signal coverage range is enhanced, and the signal receiving capability is optimized at different frequencies, so that the stability of equipment and the anti-interference effect are improved.

Aspects described herein relate to transmitting user equipment (UE) capability information related to a number of sounding reference signals (SRSs) to transmit for a number of antennas and a number of transmit chains at the UE, receiving a SRS configuration of SRS resources for transmitting the number of SRSs, transmitting the number of SRSs over the SRS resources, and receiving an antenna selection indication related to a set of one or more of the number of antennas to be associated to the number of transmit chains for performing antenna selection at the UE. Other aspects relate to receiving UE capability information, transmitting the SRS configuration, receiving the SRSs, and transmitting the antenna selection information.

The present disclosure provides a Radio Frequency Identification (RFID) device comprising an antenna formed from an electrically conductive material, a loop operatively coupled to the antenna, and an integrated circuit (IC) operatively coupled to the matching loop. The antenna exhibits improved performance when the RFID device is placed on packages containing high-dielectric materials.

This application discloses a high-isolation terminal antenna system, relating to the field of antenna technology. It combines current-loop antennas and / or magnetic flux-loop antennas with different location characteristics to provide good radiation performance while maintaining good isolation. Specifically, the terminal antenna system includes a first antenna, a second antenna, and a third antenna. The first antenna, the second antenna, and the third antenna are either current-loop antennas or magnetic flux-loop antennas. When the current-loop antenna is working, a uniform magnetic field is distributed between the radiator of the current-loop antenna and the reference ground. When the magnetic flux-loop antenna is working, a uniform electric field is distributed between the radiator of the magnetic flux-loop antenna and the reference ground. The first antenna is disposed on a first side of the electronic device, the second antenna is disposed on a second side of the electronic device, and the third antenna is disposed on a third side of the electronic device. The first side and the third side are opposite each other, and both the first side and the third side are adjacent to the second side.

An RFID tag with spatial readability comprises an antenna arrangement (100) and a carrier film (200). The antenna arrangement (100) comprises a first loop antenna (110) and a second loop antenna (120). The first loop antenna (110) is arranged on a first side (201) of the carrier film (200). The second loop antenna (120) is arranged on a second side (202) of the carrier film (200) that is opposite to the first side (201). The first and second loop antennas (110, 120) are electrically connected to one another. In a plan view of the first side (201) of the carrier film (200), a turn of the first loop antenna (110) runs in the opposite direction to a turn of the second loop antenna (120).

This specification provides one or more embodiments of an antenna structure and a ring-shaped device. The antenna structure includes: a substrate ring; an antenna coil disposed circumferentially on the substrate ring, the antenna coil having a ring antenna sensing region and a planar antenna sensing region, the magnetic field direction of the ring antenna sensing region being arranged along the axial direction of the substrate ring, and the magnetic field direction of the planar antenna sensing region being parallel to a plane perpendicular to the axial direction.

In an embodiment a device includes an electrically conductive structure, a near field communication (NFC) reader including a support supporting an electrically conductive NFC loop antenna system located in a vicinity of the electrically conductive structure and a component configured to excite the loop antenna system with a current, wherein the loop antenna system has a geometry configured to generate several electromagnetic fields in response to excitation by the current, the electromagnetic fields having a NFC carrier frequency and respective different field directions adapted to induce respective eddy currents cancelling each other in the electrically conductive structure.

An electronic device can include a curved cover layer and an antenna. The antenna can include a ground portion and a resonant element on a curved surface of a substrate. The curved surface can have a curvature that matches a curvature of the cover layer. The resonant element can include a first arm, a second arm, and a third arm fed by a feed portion. The first arm and a portion of the ground portion can form a loop antenna resonant element. The second arm and the first arm can form an inverted-F antenna resonant element, with a portion of the first arm forming a return path to an antenna ground of the inverted-F antenna resonant element. A gap between the first arm and the second arm can form a distributed capacitance. The third arm can form an L-shaped antenna resonant element. The antenna can have a bandwidth that is wide from below 2.4 GHz to greater than 9.0 GHz.

This invention discloses a dual-substrate circularly polarized reconfigurable omnidirectional antenna based on PIN diode control. The antenna comprises a first substrate and a second substrate. The second substrate has a ground plane printed on it, and the first substrate has a radiating patch printed on it. The radiating patch includes a central square patch, a Γ-shaped stub, a loop antenna, PIN diodes, and via shorting posts. Seamless switching between left-hand and right-hand circular polarization is achieved through the on / off combinations of 16 PIN diodes, with a simple switching logic. High polarization purity is achieved in both polarization modes, and the via shorting posts effectively reduce mutual interference between modes, resulting in strong switching reliability. In both circular polarization modes, the relative impedance bandwidth and axial ratio bandwidth are wide. In the left-hand circular polarization mode, the relative impedance bandwidth reaches 19.38%, covering 2.33-2.83GHz with |S11|<-10dB, and the axial ratio bandwidth reaches 26.3%, covering 2.08-2.71GHz with AR<3dB. In the right-hand circular polarization mode, the relative impedance bandwidth reaches 19.8%, covering 2.32-2.83GHz with |S11|<-10dB, and the axial ratio bandwidth reaches 23.43%, covering 2.11-2.67GHz with AR<3dB, which is significantly better than existing narrowband designs of the same type.

The utility model provides a loop antenna and a mobile terminal, the loop antenna comprises a first radiation unit, a second radiation unit, a feed component and a grounding component, the first radiation unit surrounds the feed component and is electrically connected with the feed component, and the second radiation unit is electrically connected with the grounding component. The second radiation unit surrounds the grounding part and is electrically connected with the grounding part; the first radiation unit is connected with the second radiation unit, the first radiation unit is provided with a first slot, the second radiation unit is provided with a second slot, the first slot and the second slot are communicated with each other, and a gap is formed between the first radiation unit and the second radiation unit. According to the loop antenna, the overall performance of the antenna can be effectively improved, the loop antenna can realize coverage of multiple frequency bands in a limited space by adopting a specific structural design, and meanwhile, stable carrier aggregation performance is kept; therefore, the problem that the existing mobile phone antenna design is difficult to meet the high requirement of the North America market on carrier aggregation is solved.

The present disclosure provides a Radio Frequency Identification (RFID) device comprising an antenna formed from an electrically conductive material, a loop operatively coupled to the antenna, and an integrated circuit (IC) operatively coupled to the feeder loop. The antenna exhibits improved performance when the RFID device is placed on packages containing high-dielectric materials.

To provide a rectenna device that allows for easy impedance matching between an antenna and a rectifier circuit.SOLUTION: A rectenna device 100 includes an antenna unit 10 that has a loop antenna 11 consisting of a long side and a short side, and receives microwaves, a rectifier circuit 51 that converts high-frequency signals from the antenna unit 10 into DC power, a harmonic reflection circuit 53 that returns harmonics generated from the rectifier circuit 51 to the rectifier circuit 51, and a matching circuit 52 that performs impedance matching between the antenna unit 10 and the rectifier circuit 51 and is electrically connected to the antenna unit 10 via a feeding point 12 located on the long side.SELECTED DRAWING: Figure 8

A communication apparatus configured to communicate with a wireless tag, includes: a plurality of loop antennas, each of the antennas being configured to output a magnetic field corresponding to a transmission signal relating to the communication with the wireless tag to independently communicate with the wireless tag; a communication control unit configured to output the transmission signal to a communication-target loop antenna among the plurality of loop antennas; and a control unit configured to control a non-target loop antenna different from the communication-target loop antenna to generate a magnetic field for negating a magnetic field leaking from the communication-target loop antenna.

[Problem] To provide a rectenna which can cope with a plurality of operating frequencies, is small-sized, and has a high rectifying efficiency. [Solution] A rectenna having a first operating frequency f1 and a second operating frequency f2 different from each other, the rectenna being characterized in that a first loop antenna A and a second loop antenna B to which a capacitor is connected in series are connected in parallel to the input terminals of a rectifier.

1. The name of the design product: antenna erection packaging box. 2. The use of the design product: for the storage and erection of the loop antenna. 3. The design points of the design product: in shape. 4. The picture or photo that best shows the design points: front view.

Aspects described herein relate to transmitting user equipment (UE) capability information related to a number of sounding reference signals (SRSs) to transmit for a number of antennas and a number of transmit chains at the UE, receiving a SRS configuration of SRS resources for transmitting the number of SRSs, transmitting the number of SRSs over the SRS resources, and receiving an antenna selection indication related to a set of one or more of the number of antennas to be associated to the number of transmit chains for performing antenna selection at the UE. Other aspects relate to receiving UE capability information, transmitting the SRS configuration, receiving the SRSs, and transmitting the antenna selection information.

The application discloses a coupling loop antenna and electronic equipment, the coupling loop antenna comprises a non-conductive medium base, an antenna reference ground plate and a transceiving unit; the transceiving unit comprises a ground wire and a feed line, the ground wire and the feed line extend along the surface of the non-conductive medium base and are in the form of a non-closed ring as a whole; one end of the ground wire is connected with the antenna reference ground plate, and the other end of the ground wire is provided with a first coupling section; one end of the feed line is used for being connected with a transmitter and / or a receiver, and the other end of the feed line is provided with a second coupling section; the first coupling section and the second coupling section extend side by side and have a first gap therebetween; the first gap is configured to enable the first coupling section and the second coupling section to be coupled with each other to form self-resonance. The coupling loop antenna has good metal interference resistance and good performance, and has high flexibility.

Provided in the embodiments of the present application are an antenna structure and an electronic device. The antenna structure comprises: a first dual-loop antenna unit and a second dual-loop antenna unit, wherein the first dual-loop antenna unit comprises a first antenna and a second antenna, and the second antenna surrounds the first antenna; the second dual-loop antenna unit comprises a third antenna and a fourth antenna, and the fourth antenna surrounds the third antenna; the surface of the first dual-loop antenna unit is not in contact with the surface of the second dual-loop antenna unit; the first dual-loop antenna unit is electrically connected to the second dual-loop antenna unit; and the antenna structure is electrically connected to an electronic device configured to be provided with the antenna structure. By using the dual-loop antenna units, dual-frequency right-handed circular polarization of the antennas is realized, the coverage range of a signal is enhanced, and the signal reception capability is optimized at different frequencies, thereby achieving the effects of improving the stability of a device and improving the anti-interference capability.

In some embodiments, a radio frequency identification (RFID) system may include at least one Ultra High Frequency (UHF) antenna component, a conductive loop having a largest dimension that is smaller than the wavelength of radiation transmitted at a Microwave Frequency (MW). The conductive loop may define a gap and an RFID chip may be electrically coupled to the conductive loop. The conductive loop may be configured to be resonant at an Ultra High Frequency (UHF) and less resonant at Microwave Frequency (MW). The antenna component may be selected from the group consisting of a dipole antenna, a monopole antenna, a loop antenna, or a slot antenna.