34 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.

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.

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 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.

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 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.

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 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.

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 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 invention provides an antenna and a communication device, relates to the technical field of antennas, and is used for solving the technical problems of large antenna size, high cost and complex layout in a multi-frequency multi-port communication module in related technologies. The antenna comprises a high-frequency radiation unit, a high-frequency grounding unit, a high-frequency feed unit, a low-frequency radiation unit, a low-frequency grounding unit, a low-frequency feed unit and a coupling unit, the high-frequency radiation unit is connected with the high-frequency grounding unit and the high-frequency feed unit, and the low-frequency radiation unit is connected with the low-frequency grounding unit and the low-frequency feed unit; the high-frequency grounding unit and the low-frequency grounding unit are arranged at intervals along a first horizontal direction, and the coupling unit is connected between the high-frequency grounding unit and the low-frequency grounding unit. According to the invention, the coupling unit is added to offset the coupling signal between the high-frequency radiation unit and the low-frequency radiation unit, so that the antenna isolation is improved.

This application provides a composite antenna, relating to the field of VHF antenna technology. The composite antenna includes a high-frequency radiator, a high-frequency choke coil, a low-frequency upper radiator, an impedance element, a low-frequency lower radiator, and a combiner assembly. The high-frequency radiator is a microstrip antenna with its antenna arm shorted to the central transmission line. The high-frequency choke coil is connected to both the high-frequency radiator and the low-frequency upper radiator. The impedance element is connected to both the low-frequency upper radiator and the low-frequency lower radiator. The combiner assembly combines the high-frequency signals transmitted and received by the high-frequency radiator and the low-frequency signals transmitted and received by the low-frequency upper and lower radiators for transmission. This design effectively ensures maximum antenna reuse within a limited space, improving antenna radiation efficiency, while also solving antenna coupling problems and enhancing antenna isolation.

An antenna module is provided with a plurality of antenna structures and a shielding structure arranged on a plate body, and the shielding structure is located between two adjacent antenna structures, where the shielding structure includes a concave portion formed on the plate body and a dielectric material formed between the concave portion and the antenna structure to generate different impedance characteristics, thereby improving the antenna isolation.

The invention provides a circuit system and method for improving antenna isolation and communication equipment. The circuit system comprises a first antenna and a second antenna which are in space electromagnetic coupling; a first receiving and transmitting end of the first power division network is used for inputting or outputting radio frequency signals, the first power division network comprises a first branch and a second branch which are connected in parallel to the first receiving and transmitting end of the first power division network, and the second branch is connected with the first antenna through a first matching network; the first receiving and transmitting end of the second power division network is used for inputting or outputting radio frequency signals, the second power division network comprises a third branch and a fourth branch which are connected in parallel to the first receiving and transmitting end of the second power division network, and the fourth branch is connected with a second antenna through a second matching network; and the phase shifter is connected between the first branch of the first power division network and the third branch of the second power division network. According to the invention, a controllable electrical path is additionally arranged, so that the transmitted energy and the space coupling energy are equal in amplitude and opposite in phase at the target antenna, and the isolation degree is improved.

The embodiment of the invention relates to the technical field of communication, and discloses an antenna array and automobile radar equipment, the antenna array comprises a substrate, a plurality of cavity antennas, an isolation structure and a frame body, the plurality of antenna cavities are arranged to form an array structure arranged on the substrate, the isolation structure is arranged on the substrate, and the frame body is arranged on the substrate. The isolation structure comprises a plurality of isolation strips, the plurality of isolation strips are arranged between the adjacent antenna cavities in a staggered manner, and the frame body is arranged on the periphery of the substrate in a sleeving manner. Through the above mode, the isolation degree between the antenna array units can be improved, the signal coupling effect and electromagnetic crosstalk between adjacent units are effectively inhibited, and the target identification precision of an automobile radar system is greatly improved.

The application discloses a multi-antenna system capable of improving the isolation of a background scanning antenna and an isolator module thereof. The multi-antenna system comprises a metal carrier disc, a background scanning antenna, working antennas and an isolator module. The isolator module can be assembled to the metal carrier disc and comprises a plurality of isolators which are at least annularly arranged to form an isolation space in which the background scanning antenna is located and outside which the working antennas are located. Thus, the design of the isolator module can make the background scanning antenna and the working antennas have good isolation.

This specification relates to the field of wireless communication antenna technology, and provides an antenna system and electronic device. The antenna system includes a suspended first radiating stub. The two ends of the first radiating stub generate a first resonance and a second resonance respectively through a first feed circuit and a second feed circuit. A choke circuit is set in the first radiating stub between the first feed circuit and the second feed circuit. By setting a choke circuit in the suspended stub, the currents of the first resonance and the second resonance on the suspended stub are prevented from affecting each other, thus ensuring antenna isolation. While improving the antenna isolation performance, the suspended stub can be used to support SAR detection.

When a user equipment is operating in a multi-carrier communication mode such as carrier aggregation (CA) or dual connectivity, it suffers from self-interference, which can be represented by a maximum

Embodiments of the present disclosure relate to a user equipment apparatus, method, and computer program for antenna isolation. The UE apparatus comprises a first transmit chain (211) comprising a first power amplifier (PA) (201); a second transmit chain (212) comprising a second PA (202); a first antenna (208) and a second antenna (209) configured to transmit signals from the first transmit chain (211) and the second transmit chain (212); a circulator (203) with a first terminal selectively connected to one of the first antenna (208) or the second antenna (209) so that the circulator (203) provides isolation from an aggressor PA to a victim PA, wherein the aggressor PA is one of the first PA (201) or the second PA (202) with a higher output power and the victim PA is another one of the first PA (201) or the second PA (202) with a lower output power.

The present application relates to the technical field of radio frequencies. Provided are a radio-frequency front-end module, a radio-frequency transceiving apparatus, and an electronic device. The present application aims to mitigate the degradation of radio-frequency performance of an electronic device that is caused by insufficient antenna isolation and to address radiated spurious emissions from a radio-frequency transceiving apparatus. The radio-frequency module comprises a first radio-frequency channel and a second radio-frequency channel, the first radio-frequency channel comprising a radio-frequency processing device, a filter circuit, and a first antenna, wherein the radio-frequency processing device is coupled to the first antenna by means of the filter circuit; and the second radio-frequency channel comprising a second antenna. The filter circuit is used for suppressing, when the first antenna receives a signal transmitted by the second antenna, the signal transmitted by the second antenna from being transmitted to the radio-frequency processing device, or for suppressing, when the signal transmitted by the second antenna is transmitted to the radio-frequency processing device and the signal transmitted by the second antenna is distorted and generates harmonics, the harmonics from being transmitted from the radio-frequency processing device to the first antenna.

The application discloses an indoor distribution system and relates to the technical field of wireless communication. The indoor distribution system comprises a first antenna, an isolator, at least one dual-mode signal amplifier and at least one second antenna, wherein each dual-mode signal amplifier in the at least one dual-mode signal amplifier and each second antenna in the at least one second antenna are in one-to-one correspondence. The first antenna is used for receiving a signal sent by a base station and sending the signal from the base station to the isolator. The signal from the base station comprises a first type of network signal or a second type of network signal. The isolator is used for receiving the signal from the first antenna and transmitting the signal from the first antenna to each dual-mode signal amplifier in the at least one dual-mode signal amplifier respectively. The dual-mode signal amplifier is used for receiving the signal from the isolator, performing amplification processing on the signal from the isolator to obtain a processed signal from the isolator, and sending the processed signal from the isolator to the second antenna corresponding to the dual-mode signal amplifier. The second antenna is used for receiving the signal from the dual-mode signal amplifier corresponding to the second antenna and sending the signal from the dual-mode signal amplifier corresponding to the second antenna to a terminal. The signal from the base station comprises the first type of network signal or the second type of network signal.

The application belongs to the technical field of antennas, and provides a television and a SUB-6G antenna assembly thereof. The SUB-6G antenna assembly applied to the television is provided, a plurality of groups of antennas are arranged on the inner side of the shell of the OPS box, each group of antennas comprises two antennas with the same working frequency, shape and size, at least one group of antennas is arranged in isolation, the communication rate can be effectively improved, the demand of the 8K high-definition television can be met, the influence of the external environment on the performance of the antenna can be effectively reduced, the universality of the antenna is good, the at least one group of antennas is arranged in isolation, the interference between the antennas can be reduced, and the working performance of the antenna is more stable.