49 results about "Antenna isolation" patented technology

The invention discloses a dual-polarization radar multi-parameter fusion rainfall estimation system and method, and relates to the technical field of meteorological radars, and the system comprises a data collection module which is used for starting a dual-polarization radar to carry out long-term observation when an observation scene with uniformly distributed light rain weather appears, recording radar polarization parameters at different elevation angles, and carrying out the data collection module; transmitting to the deviation analysis module; the deviation analysis module is used for receiving the radar polarization parameters and calculating ZDR statistical characteristics according to the reference uniform scene; according to the invention, by constructing the antenna isolation elevation angle dependence model, dynamic reverse correction is carried out on ZDR and rhohv measurement values under different elevation angles, the influence of dynamic degradation of the antenna cross polarization isolation along with the scanning elevation angle on the measurement values is effectively eliminated, and real-time sensing and compensation of the isolation degradation along with the dynamic change of the elevation angle are realized; the radar can keep high measurement precision in the whole scanning space, and the conditions of precipitation phase state misjudgment and missing report are reduced, so that the accuracy of precipitation estimation is improved.

Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may select, based at least in part on antenna isolation information for the UE, a pair of antennas from among at least three antennas available for transmission on the UE. The UE may transmit a communication using the pair of antennas. Numerous other aspects are described.

The application relates to an antenna assembly and an electronic device, wherein the antenna assembly comprises a main body part and a feeding assembly, the main body part is provided with a first slot antenna and a second slot antenna and an isolation structure, a first feeding part and a second feeding part are arranged in the first slot antenna and the second slot antenna respectively, the isolation structure can comprise a first isolation slot perpendicular to the slot antenna and / or a second isolation slot parallel to the slot antenna, the first isolation slot is used for adjusting a differential mode signal impedance, the second isolation slot is used for adjusting a common mode signal impedance, the overall isolation degree of the antenna assembly is improved by adjusting the differential mode signal impedance and / or the common mode signal impedance, so that the signal quality of the antenna is improved, the possibility of mutual interference between different signals is reduced, and the actual use requirement is met.

The utility model discloses a kind of high-isolation miniaturization double-sided panel circular antenna and application.It is through the mode of adjusting feedback short line length and position and adjusting the shape of antenna vibrator, in addition, the length of transmission feed line is also limited, finally realize improved antenna isolation, improve low-power Doppler effect radar sensor performance, applicable to low-cost double-sided panel radar module, can be used in low-cost radar, RFID transceiver and multiple scenes such as RFIDs transceiver.Effective as compared with prior art: while providing small size, improve the isolation of antenna, greatly reduce the noise of radar module, and sensing distance is greatly improved.The utility model solves the problem that 1mA low-power radar module is applied to globe lamp, and greatly reduces production cost, with very high commercial value.

The invention provides a shell assembly and a foldable terminal. The shell assembly is applied to the foldable terminal, the foldable terminal has an unfolded state and a folded state, the foldable terminal comprises a plurality of folding parts which are sequentially and rotationally connected through a rotating shaft, at least one folding part is provided with the shell assembly, and at least part of the shell assembly is a coupling medium. The coupling medium is used for being electromagnetically coupled with the other folding part and / or the rotating shaft which are oppositely arranged in a folding state, and the coupling medium is electrically connected with the grounding structure of the folding part; the shell assembly is provided with a first edge part, a second edge part and a third edge part which are connected in sequence, the first edge part and the third edge part are located on the same side of the second edge part, and the coupling medium is provided with a first part located on the first edge part, a second part located on the second edge part and a third part located on the third edge part. According to the shell assembly and the foldable terminal provided by the embodiment of the invention, the risk that the antenna isolation becomes poor can be reduced.

An antenna system, an antenna isolation adjustment method, and an air interface cancellation structure may be applied to a full-duplex communication system to implement air interface cancellation of an environment interference path. The system includes a first antenna array, a second antenna array, N air interface cancellation structures, and a feedback circuit. The N air interface cancellation structures perform phase adjustment or both phase adjustment and amplitude adjustment on a communication signal between the first antenna array and the second antenna array based on signal information of the communication signal and signal information of a received hybrid signal that are obtained by the feedback circuit, to adjust isolation between a first radio frequency port set of the first antenna array and a second radio frequency port set of the second antenna array.

A method and system for suppressing leakage signal of continuous wave SAR by using secondary sampling, according to the characteristics that the leakage signal is strongly superimposed on the weak echo signal in the SAR system, after the first digital sampling of the SAR echo signal, secondary sampling is performed after the original signal cancellation (suppression of leakage signal) of the digital-to-analog conversion, and finally the effective echo data is obtained. The method can suppress the leakage signal without improving the antenna isolation, and can lay the foundation for the application of continuous wave SAR on satellite platform.

The invention provides a folding screen terminal, and relates to the technical field of electronic equipment. The problems that when the folding screen terminal is in a folded state, an extra coupling path is generated, so that the antenna isolation becomes poor, and the antenna performance is affected are solved. The folding screen terminal comprises a middle frame, a rotating shaft mechanism, a decorative cover and an electric connecting piece. The number of the middle frames is multiple, and every two adjacent middle frames are rotationally connected through a rotating shaft mechanism. Decorative covers are arranged on at least part of the middle frame, and at least one decorative cover comprises a metal body. The electric connecting piece is arranged in the middle frame corresponding to the metal body, one end of the electric connecting piece abuts against the metal body, and the other end of the electric connecting piece is electrically connected with the grounding end of the folding screen terminal.

The application relates to the technical field of antenna isolation test, and discloses an intelligent test method and system for multi-port antenna isolation performance, which comprises the following steps: sequentially testing the transmission coefficients of each group of to-be-tested ports of a measured antenna by using a network analyzer, and constructing an S parameter matrix; any group of to-be-tested ports comprises an excitation port and a response port, and the transmission coefficient is the ratio of the power of a scattering wave received by the response port to the power of an incident wave input by the excitation port; based on the S parameter matrix, the isolation of each group of to-be-tested ports at each frequency within the working frequency band of the measured antenna is calculated; the worst isolation of all groups of to-be-tested ports within the working frequency band is identified, and the worst isolation is marked as the isolation of the measured antenna. The application effectively avoids measurement errors and accidental interference, and improves the accuracy and reliability of the isolation test.

The invention relates to a metal shell, in particular to the technical field of communication equipment, and at least one groove body is reserved in the side wall and / or the bottom surface of the metal shell; the metal shell is subjected to anodic oxidation treatment to form a porous layer; an antenna isolating bar is embedded in the groove body in a curing manner; the antenna isolating bar is formed by filling and curing glue at normal temperature; and the glue is cured and bonded with the porous layer when being cured and formed. According to the metal shell provided by the invention, the antenna isolating bar obtained by forming has good use performance, and the formed material has relatively high signal transmission performance, namely, the shielding effect on signals is remarkably reduced, the interface bonding force of the material and the metal middle frame is improved, and the defects of easy cracking, acid spitting, white line generation and the like in the subsequent anode process are avoided.

The invention discloses a low-speed speed measurement method for a sine frequency modulation Doppler radar, and mainly solves the problems that the existing debugging test is complicated, and the speed measurement cannot be carried out due to easy lock losing during low-speed flight. The implementation scheme comprises the following steps: determining side frequency times, a modulation index and a modulation frequency; a DDS is used for digitally synthesizing a sine frequency modulation signal, the sine frequency modulation signal is mixed with a local oscillator signal generated by a PLL to generate a radio frequency sine frequency modulation signal, and the radio frequency sine frequency modulation signal is transmitted to specific four directions in turn according to a period; performing phase shifting and frequency mixing on a coupling signal of the echo signal and the transmitting signal, performing down-conversion to a base band, and performing band-pass filtering to obtain a side frequency component containing a Doppler frequency spectrum; carrying out IQ demodulation on the side frequency component and IQ two-path coherent reference signals thereof to obtain an IQ signal of a Doppler spectrum; and calculating the IQ signal of the Doppler frequency to obtain the speed information of the aerial carrier. The method greatly reduces the isolation index requirement of the receiving / transmitting antenna of the Doppler radar, improves the speed measurement capability of the Doppler radar during low-altitude low-speed flight, and can be used for airborne Doppler radars.

Techniques are provided for improving antenna isolation and angle-of-arrival (AoA) performance of an antenna array. An example antenna array includes a plurality of patch antenna elements disposed on a planar substrate, and one or more resonator elements disposed on the planar substrate and between each of the plurality of patch antenna elements, wherein each of the one or more resonator elements includes a first repeating S-shaped conductor in a first orientation, and a second repeating S-shaped conductor in a second orientation that is rotated 180 degrees relative to the first orientation.

The application discloses an omnidirectional cross dual-polarized vibrator and an antenna, and the vibrator comprises a dipole vibrator, a choke disc, a fixed cylinder, a feeding sheet and a coaxial cable. The dipole vibrator is uniformly arranged on the side wall of the fixed cylinder and uniformly adheres to the side wall of the fixed cylinder, and the dipole vibrator comprises an upper vibrator lobe and a lower vibrator lobe. The center of a first positioning hole at the bottom end of the upper vibrator lobe is point A, the center of a second positioning hole at the top end of the lower vibrator lobe is point B, the straight line connecting point A and point B forms a polarization line, the included angle between the polarization line and a horizontal plane is 45 DEG, the dipole vibrator is provided with four groups, adjacent dipole vibrators are arranged at an angle of 90 DEG, the polarization lines of opposite dipole vibrators cross each other perpendicularly and are ±45 DEG polarized. Compared with the prior art, the vibrator not only reduces the mutual interference between two groups of vibrators, but also meets the miniaturization and compactness and improves the antenna isolation degree, and forms a double ±45 DEG omnidirectional radiation form.

A directional coupler is operably connected to each antenna of a transmitting transceiver that has multiple antennas, and a tunable load is operably connected to each directional coupler. The directional couplers act to couple a co-located receiving transceiver to the antennas of the transmitting transceiver. Each tunable load is constructed based on a reflection coefficient (Γ) that is determined for that tunable load, in that the type of components and / or the values of some or all of the components that are used in the tunable load are determined based on the reflection coefficient (Γ) associated with that tunable load. The tunable loads cancel or reduce interferences experienced by the co-located receiving transceiver when the transmitting transceiver is transmitting using at least one of the multiple antennas.

The present application provides a housing assembly and a foldable terminal. The housing assembly is applied to the foldable terminal, the foldable terminal has an unfolded state and a folded state, the foldable terminal comprises a plurality of folding portions rotatably and sequentially connected by means of a rotary shaft, at least one folding portion is provided with the housing assembly, at least part of the housing assembly is a coupling medium, the coupling medium is used for electromagnetically coupling with another folding portion, which is opposingly arranged, and / or the rotary shaft in the folded state, and the coupling medium is electrically connected to a grounding structure of the folding portion. The housing assembly is provided with a first edge portion, a second edge portion, and a third edge portion which are sequentially connected, the first edge portion and the third edge portion are located on a same side of the second edge portion, the coupling medium is provided with a first portion located at the first edge portion, a second portion located at the second edge portion, and a third portion located at the third edge portion. The housing assembly and the foldable terminal provided in the embodiments of the present application can reduce the risk of antenna isolation deterioration.

The application relates to a small-sized dual-frequency dual-polarized antenna which comprises a dielectric plate and a radiation unit arranged on the dielectric plate, the radiation unit comprises two pairs of arm groups arranged orthogonally, each pair of the arm groups comprises two dual-frequency oscillator arms arranged at intervals and diagonally, two adjacent dual-frequency oscillator arms are arranged at intervals in a clockwise direction and are formed with a coupling gap, and a frequency-reducing gap for reducing a resonant frequency is arranged on the dual-frequency oscillator arm. The coupling gap improves impedance matching of a low-frequency band and a high-frequency band, reduces cross-polarization radiation, improves antenna isolation, increases a current path through the frequency-reducing gap, reduces the resonant frequency, reduces the size of the antenna, improves radiation efficiency, and improves horizontal plane coverage.

This application provides a radio frequency (RF) module and electronic device, relating to the field of RF technology. It aims to improve the problem of reduced RF performance of electronic devices due to antenna isolation. The RF module includes a first RF channel and a second RF channel. The first RF channel includes an RF processing device, a filtering circuit, and a first antenna. The RF processing device is coupled to the first antenna through the filtering circuit. The second RF channel includes a second antenna. The filtering circuit is used to suppress the transmission of the signal transmitted from the second antenna to the RF processing device when the first antenna receives a signal transmitted from the second antenna, or to suppress the transmission of harmonics from the RF processing device to the first antenna when the signal transmitted from the second antenna is distorted and generates harmonics.

The application provides an array antenna mutual coupling calibration method and system based on spatial multi-scale feature decoupling, relates to the technical field of antenna testing, and comprises the following steps: placing a target antenna array in a full-wave anechoic chamber, connecting two ports to a vector network analyzer, and terminating the remaining ports with a matching load; measuring and obtaining the transmission coefficient between the two ports in a preset working frequency band to represent the coupling strength between the ports; repeatedly performing the measurement operation on multiple port pairs to obtain a scattering parameter matrix representing the mutual coupling effect; and comparing the scattering parameter with a preset technical index to determine whether the antenna isolation meets the requirements. The application can comprehensively and accurately represent the mutual coupling effect of a multi-channel antenna, avoid errors caused by reflection interference in the testing process, realize rapid determination and quality control of the isolation performance, and provide a reliable basis for the design optimization and engineering application of a base station antenna.

The invention relates to an electronic equipment shell forming process, in particular to the technical field of communication equipment, and the electronic equipment shell forming process comprises the steps of machining, surface treatment and insulator glue injection forming which are carried out in sequence; the insulator glue injection molding comprises the steps of surface activation, mold cavity construction, glue injection, curing and demolding; and the glue injection process comprises glue injection molding of an antenna dividing strip on the back side of the shell and glue injection molding of a decoration strip on the front side of the shell. According to the electronic equipment shell forming process provided by the invention, by adopting the glue injection process, glue injection forming of the antenna isolation strip and the decoration strip on the electronic equipment shell is realized, the bonding force of the antenna isolation strip and the decoration strip with the base material is improved, and the defects of easy cracking, acid spitting and white line generation in the subsequent anode process are avoided; and meanwhile, the antenna isolation strip and the decoration strip obtained by the glue injection molding process have good high and low temperature impact resistance and high temperature and high humidity resistance.

The application relates to a dual-polarized antenna isolation feeding structure and a high-isolation dual-polarized horn antenna, and belongs to the microwave technical field.The dual-polarized antenna isolation feeding structure comprises a waveguide seat, a first feeding waveguide, a second feeding waveguide, a first feeding socket with a first socket inner core and a second feeding socket with a second socket inner core, the first feeding waveguide is a square waveguide, and the second feeding waveguide is a rectangular waveguide; the first feeding waveguide and the second feeding waveguide are arranged in the waveguide seat; the first feeding socket is connected to a first position of the waveguide seat; the second feeding socket is connected to a second position of the waveguide seat; the distance between the projection points of the first position and the second position on the length direction axis of the waveguide seat is L1, L1=(1 / 3~2 / 3) * lambda1; lambda1 is the wavelength of the nominal center frequency of the antenna. The dual-polarized antenna isolation feeding structure provided by the application can improve the isolation degree of the port without increasing the manufacturing difficulty and cost.

The invention relates to the technical field of antenna isolation testing, and discloses an intelligent testing method and system for the isolation performance of a multi-port antenna, and the method comprises the steps: sequentially testing the transmission coefficients of each group of to-be-tested ports of a tested antenna through a network analyzer, and constructing an S parameter matrix; any group of ports to be tested comprises an excitation port and a response port, and the transmission coefficient is the ratio of the power of scattered waves received by the response port to the power of incident waves input by the excitation port; respectively calculating the isolation degree of each group of ports to be tested at each frequency in the working frequency band of the tested antenna based on the S parameter matrix; and identifying the worst isolation degree of all groups of ports to be tested in the working frequency band, and marking the worst isolation degree as the isolation degree of the tested antenna. According to the invention, measurement errors and accidental interference are effectively avoided, and the accuracy and reliability of the isolation test are improved.

This invention discloses a high-isolation radio altimeter microstrip antenna, mainly addressing the problem of low isolation in existing antennas. From top to bottom, it includes a radiator (1), an adjustment structure (2), and a ground plane (3). The adjustment structure (2) includes a frame (21), metal stubs (22), shorting pins (23), and a dielectric (24). The metal stubs consist of three parts, with the first part located at the antenna's central axis AA, and the second and third parts symmetrical about the antenna's central axis AA. The shorting pins consist of three groups, with the first group located at the antenna's central axis AA, and the second and third groups symmetrical about the central axis AA. The frame and metal stubs are located on the upper surface of the dielectric, while the shorting pins are located inside the dielectric. This invention uses a split design to form a transmitting antenna and a receiving antenna, which can be flexibly installed in different positions on the device, effectively improving the isolation between the transmitting and receiving antennas. It can be used in radio altimeters or ranging / altitude radars.

A low-sidelobe waveguide array antenna for a millimeter wave vehicle-mounted radar comprises a lower metal layer and an upper metal layer which are matched with each other, a first-stage E-plane waveguide is connected with a first-stage hole coupling power divider, the first-stage hole coupling power divider is connected with a second-stage E-plane waveguide, and the second-stage E-plane waveguide is connected with a second-stage hole coupling power divider. The secondary hole coupling power divider and the secondary hole coupling cavity phase shifter are respectively and sequentially connected with the secondary E-plane waveguide through respective rectangular cut holes and are respectively provided with a radiation waveguide opening unit, the secondary hole coupling power divider is provided with two radiation waveguide opening units, and the hole coupling cavity phase shifter is provided with a radiation waveguide opening unit. Each radiation waveguide opening unit is connected with one metal horn unit; the metal horn array is composed of a plurality of metal horn units; a choke groove is arranged between two adjacent rows of metal horn arrays; a dummy array is arranged on one side of the metal horn array. According to the invention, a surface wave suppression technology of antenna isolation and antenna gain can be considered at the same time, and a more compact and flexible-layout mixed feed mode is adopted.

The application provides a circuit system and method for improving antenna isolation, and a communication device. The circuit system comprises a first antenna and a second antenna with spatial electromagnetic coupling; a first power dividing network, a first transceiving end of which is used for inputting or outputting a radio frequency signal, the first power dividing network comprising a first branch and a second branch connected in parallel to the first transceiving end, and the second branch being connected to the first antenna through a first matching network; a second power dividing network, a first transceiving end of which is used for inputting or outputting a radio frequency signal, the second power dividing network comprising a third branch and a fourth branch connected in parallel to the first transceiving end, and the fourth branch being connected to the second antenna through a second matching network; and a phase shifter connected between the first branch of the first power dividing network and the third branch of the second power dividing network. The application adds a controllable electrical path, so that the energy transmitted by the electrical path and the energy coupled in space are equal in amplitude and opposite in phase at the target antenna, thereby improving the isolation.

The utility model relates to an antenna assembly, an antenna system and a terminal, the antenna assembly comprises two antennas spaced from each other and a conductive member, the conductive member is arranged between the two antennas, two ends of the conductive member are respectively inserted into accommodating cavities of the two antennas and are insulated from the two antennas, and the conductive member is grounded. According to the antenna assembly, the two sides of the conductive part are inserted into the two adjacent antennas respectively, so that part of the conductive part is accommodated in the internal space of the antennas, the space utilization rate of the antenna assembly is improved, and the conductive part can adapt to the condition that the distance between the two antennas is limited. And the conductive piece is insulated from the antennas and is grounded, so that the conductive piece can isolate the two adjacent antennas, the isolation degree between the two adjacent antennas is improved, and the mutual interference effect between the two adjacent antennas is improved.

A delay profile generation device according to one embodiment comprises: a receiving antenna that receives and outputs a signal; a combining unit that adds the signal output by the receiving antenna to another signal and outputs the result; a transmitting antenna that transmits the input signal; a first cable that transmits, over a predetermined length, the signal output by the combining unit while amplifying the signal at a predetermined amplification factor; a second cable that is provided with a variable attenuator and transmits the signal attenuated by the variable attenuator at a predetermined attenuation factor; and a branching unit that branches the signal transmitted by the first cable and outputs the branched signals to the transmitting antenna and the second cable, respectively. The second cable transmits the signal input from the branching unit to the combining unit while attenuating the signal at a predetermined attenuation factor. The combining unit, first cable, branching unit, and second cable are housed in a housing so as to ensure isolation from the receiving antenna and the transmitting antenna.

The present disclosure relates to an antenna isolation circuit, an antenna module and an electronic device, the antenna isolation circuit comprising: a first floating antenna arm, a resonance circuit, an isolation device, a pi-type matching circuit and a first frequency band antenna, a first end of the resonance circuit is connected with a first end of the first floating antenna arm, a second end of the resonance circuit is connected with an equipotential, a first end of the isolation device is connected with the first end of the first floating antenna arm, a second end of the isolation device is connected with a first end of the pi-type matching circuit, a second end of the pi-type matching circuit is connected with the first frequency band antenna, a third end and a fourth end of the pi-type matching circuit are respectively connected with the equipotential, and the first frequency band antenna is connected with the equipotential. Thus, the isolation between antennas is improved, the problem of reduced antenna efficiency and deteriorated performance caused by mutual interference between antennas is avoided, each antenna works independently, and the signal quality and signal strength of each frequency band electromagnetic wave signal are improved.

The utility model provides a kind of high-density antenna isolation degree enhancement antenna array, belong to antenna technical field, its antenna body is rectangular, and the array unit of rotational symmetry is equipped in top surface four corners, interval is 0.3λ.Antenna body adopts microstrip+dielectric filling to realize low profile, and array unit contains metal radiator outer cover high dielectric constant support insulator to reduce size.Antenna body top surface center cross metal isolation component is made of four vertically arranged concave section isolation plate, and it is accurately placed between adjacent units.The structure effectively blocks electromagnetic coupling path, and the actual measurement isolation degree is improved by more than 15dB compared with traditional scheme, and the surface current dissipation is guided by quasi-periodic boundary condition, without significantly increasing loss.Rotational symmetry layout naturally tolerates process error, ensures phase consistency, and the yield is better than asymmetric design.

Electronic device (10), comprising: a case (12); first and second antennas (40A, 40B) inside the housing (12); a loudspeaker (76) in the housing (12) which has a movable element (74); and an antenna isolation element (108) on the movable element (74) which is configured to improve high-frequency isolation between the first and second antennas (40A, 40B), and wherein the antenna insulation element (108) forms a parasitic antenna resonance element.

The application provides a CPE array antenna capable of improving antenna isolation and performance, and belongs to the field of antenna structures. The CPE array antenna capable of improving antenna isolation and performance comprises two or more groups of antennas, and all the antennas form a ring-shaped antenna array; each group of antennas comprises two antennas which are completely identical in structure; the CPE array antenna comprises two groups of antennas with the same frequency band, namely a first group of antennas and a second group of antennas; the first group of antennas comprises a first antenna and a second antenna; the first antenna and the second antenna are arranged in parallel; a vertical center line of the first antenna and the second antenna is taken as a central axis plane; the second group of antennas is symmetrically arranged on both sides of the central axis plane; the first group of antennas and the second group of antennas are arranged vertically, and the distance between the first group of antennas and the second group of antennas is not less than 1 / 4 wavelength. The application has the advantages of compact structure, small mutual influence between antennas with the same frequency band, and improved antenna isolation and performance.