202 results about "Standing wave ratio" patented technology

The invention is suitable for the technical field of communication, and particularly relates to a method for detecting mismatched harmonic waves of a power amplifier. The method comprises the steps that a first power detection unit is connected with a coupler through a control unit, the standing-wave ratio of a to-be-detected power amplifier chip is adjusted to be 1: 1 through a tuner, and the power of an input signal of a vector signal generator is adjusted till the target power of the to-be-detected power amplifier chip is reached; the second power detection unit is connected with the coupler through the control unit, the output standing-wave ratio of the to-be-detected power amplifier chip is adjusted to a preset specific value through the tuner, and when the tuner modulates phases at intervals of preset degrees, the harmonic power of the to-be-detected power amplifier chip in each phase is recorded through the second power detection unit. Compared with the prior art, the method can accurately test and evaluate the harmonic wave of the to-be-tested power amplifier chip under the mismatched standing wave condition, thereby evaluating the harmonic wave index of the to-be-tested power amplifier chip.

The invention relates to the technical field of radio frequency circuits, and provides a protection circuit, method and module of a radio frequency front-end circuit and a radio frequency device.The protection circuit comprises a bidirectional power detection module which is connected in series in a link from a power amplifier of the radio frequency front-end circuit to a radio frequency output end; the comparison trigger module is connected with the bidirectional power detection module; and the power control module is connected with the comparison trigger module and the power amplifier. The bidirectional power detection module detects forward power and reverse power of a link to form a first signal and a second signal, and the comparison trigger module performs comparison processing according to the first signal and the second signal and generates a trigger signal when the output power is too large or the standing-wave ratio is too large. And the power control module adjusts the output power of the power amplifier according to the trigger signal, so that negative effects on circuit elements caused by overlarge output power or overlarge standing-wave ratio are avoided, the circuit elements are protected from being damaged, high-precision protection on the radio frequency front-end circuit is realized, and the safety and the reliability are improved.

The invention relates to a radio frequency coaxial connector with an automatic compensation structure. The radio frequency coaxial connector is used for direct insertion-screwing tool-free field installation of a smooth copper-clad aluminum pipe radio frequency cable. The connector shell is composed of a rear threaded shell body, a middle threaded shell body and a front threaded shell body, a blind hole is formed in the rear portion of the inner conductor, and the core wire can float in the hole to avoid crushing. According to the radio frequency coaxial connector with the automatic compensation structure, the rear portion of the inner conductor is supported by means of the two insulation supports of the insulation assembly, and in the process that the cable core wire is inserted into the insertion hole of the inner conductor, the cable core wire is inserted into the insertion hole of the inner conductor. Impedance can be automatically compensated, so that impedance matching of a product is guaranteed, and the voltage standing-wave ratio is reduced; and the insulation support of the product is not an inverted cone type tightening structure in the prior art, but clamps the cable core wire in a sliding manner, so that the stress of the connector insulator adopting the structure is relatively small, and the situation that the inner conductor cannot tighten the cable due to deformation is avoided.

The invention discloses a rectangular waveguide sealing window structure for realizing broadband transmission, which belongs to a microwave signal detection device and comprises a first rectangular waveguide cavity, a second rectangular waveguide cavity and a rectangular dielectric block arranged between the first rectangular waveguide cavity and the second rectangular waveguide cavity, the first rectangular waveguide cavity comprises a first rectangular waveguide shell and two first stepped transition structures embedded into an inner cavity of the first rectangular waveguide cavity, and the second rectangular waveguide cavity comprises a second rectangular waveguide shell and two second stepped transition structures embedded into the second rectangular waveguide shell. The opposite side faces of the two first stepped transition structures and the two second stepped transition structures are provided with identical tooth-shaped steps, the second rectangular waveguide shell is further internally provided with an installation cavity communicated with the second I-shaped sliding groove, the two waveguide cavities are connected through screws, and the rectangular dielectric block is fixedly installed in the installation cavity. The vertically symmetrical multi-stage stepped impedance matching network provided by the invention realizes excellent transmission performance with low voltage standing-wave ratio in a wide frequency band, and is suitable for a millimeter wave system with high power and wide frequency band.

The utility model provides an ultra-wide-band high-performance array antenna, which comprises a plurality of ultra-wide-band oscillator units arranged on a reflecting substrate in an array form, the ultra-wideband oscillator unit comprises a plurality of radiation parts arranged on the dielectric plate at intervals, and the radiation arm of any radiation part and the radiation arm of the adjacent radiation part are collinear to form a dipole; in one radiation piece, any two adjacent radiation arms are perpendicular to each other to form a dual-polarized oscillator; the ultra-wideband oscillator unit further comprises a parasitic branch knot. The parasitic branches are arranged between every two radiation pieces, and the parasitic branches are arranged on the dielectric plate in the horizontal direction and the vertical direction; the radiation part and the parasitic branch knot are coupled and connected to form a frequency expanding structure. According to the utility model, the S parameter of the oscillator unit is optimized by arranging the coupling frequency-broadening structure and the parasitic branch knot, electromagnetic waves are guided through the cooperation of the reflecting strip, the isolating strip and the director, the interference of high frequency to low frequency is reduced, the standing-wave ratio of the antenna is further reduced, and the directivity of the antenna is improved.

The invention, which relates to the technical field of modern communication, discloses a metasurface-based high-gain low-profile dual-circularly polarized antenna comprising a first dielectric plate, a second dielectric plate arranged below the first dielectric plate, and a metasurface structure arranged above the first dielectric plate. Three rows and three columns of periodically arranged metasurface structures are arranged above the first dielectric plate, a multi-level cooperative working mechanism is constructed by combining 45-degree symmetrical composite gaps etched in a layer indirect floor and a microstrip feeder line which is orthogonally arranged on the lower layer, and the metasurface array realizes high-gain radiation by regulating and controlling the phase of electromagnetic waves. The composite slot structure efficiently converts microstrip line energy into an orthogonal degenerate mode through non-contact coupling, circular polarization purity is guaranteed, the axial ratio bandwidth is expanded to 24.2%, an orthogonal microstrip feeder line forms a 90-degree phase difference through accurately controlled size, high isolation and stable standing-wave ratio of double ports are guaranteed, and the antenna has a wide application prospect. And finally, dual-circular-polarization independent radiation is realized in a 5mm low-profile structure.

Provided is a radio transmitter test system that enables accurate measurement of reflected wave power of an antenna. A radio transmitter test system includes: a power amplifier that amplifies power of a high-frequency signal from a signal generator; a simulative antenna for which a voltage standing wave ratio is variable and that is connected to a coaxial cable in place of an antenna; a directional coupler that is connected between the power amplifier and the simulative antenna, couples the high-frequency signal to the simulative antenna, and outputs traveling wave power and reflected wave power between the power amplifier and the simulative antenna; a power meter connected downstream of the directional coupler; and a control device, wherein the control device calculates, for each voltage standing wave ratio of the simulative antenna, a correlation coefficient indicating a correlation between traveling wave power and reflected wave power of the simulative antenna and traveling wave power and reflected wave power measured by the power meter, and calculates reflected wave power of the antenna by correcting, with the correlation coefficient, the traveling wave power and the reflected wave power measured by the power meter in a state where the simulative antenna is replaced by the antenna.

The invention relates to the technical field of coupler design, in particular to a bi-directional coupler applied to a high-frequency RFID (Radio Frequency Identification Device) system, which comprises the following steps: S1, respectively constructing a series transformer, a parallel transformer and a Magic-T structure hybrid network, and forming an impedance self-matching coupler core framework by adopting a plurality of Ni-Zn ferrite double-hole magnetic rings; s2, inputting an original coupling signal output by the coupler core architecture into a phase-amplitude cooperative calibration module to generate a calibrated stable coupling signal; s3, inputting the stable coupling signal into a bridging T-type attenuation network group, respectively performing accurate power adjustment on a forward coupling path and a reverse coupling path, and finally outputting a high-directivity and low-fluctuation coupling signal; s4, monitoring the impedance state of an antenna port in real time, and feeding back and adjusting a matching network structure to realize stable control of the standing-wave ratio in a full frequency band range; according to the invention, the design of an external matching circuit is simplified, the coupling efficiency and directivity are improved, and the method has important engineering value.

The invention relates to an automatic switching device for antennas of train dispatching main and standby stations and an implementation method. The device comprises a radio frequency interface, a radio frequency switch, a directional coupler, a detector, a microcontroller and an LED indicating lamp, the radio frequency interface I is connected with an antenna, the radio frequency interface II and the radio frequency interface III are respectively connected with a main station platform and a standby station platform, and the radio frequency switch realizes automatic switching between the antenna and the main station platform and the standby station platform under the control of the microcontroller. The directional coupler and the detector are used for collecting forward and reverse power of a transmitted signal, and the microcontroller calculates a standing-wave ratio according to detection voltage and performs threshold judgment. The method comprises the steps that after the device is powered on, the default antenna is communicated with the master station, and when it is detected that standby station transmitting signals meet a threshold, the standby station is automatically switched to; and if the signals of the standby station are insufficient, the master station is kept working, and indication and alarm are carried out through an LED. The device realizes rapid and automatic switching between the main station and the standby station, reduces the communication interruption time, and effectively improves the reliability and the operation and maintenance automation level of a communication system.

The utility model discloses an improved medium-wave multi-order deploying network, which belongs to an antenna deploying facility and comprises a first-order tuning unit and a second-order tuning unit. The first-order tuning unit comprises a first inductance coil and a second inductance coil which are connected in parallel and grounded, the second tuning unit comprises a third inductance coil and a fourth inductance coil, the first-order tuning unit and the second-order tuning unit are designed in the network, the broadcast frequency working bandwidth can be widened, and when the standing-wave ratio is smaller than or equal to 1.2, the frequency of the broadcast frequency can be increased. And the debugging bandwidth is 3 times of the bandwidth of the traditional inverted L-shaped, T-shaped or pi-shaped single-loop deploying network, and the broadcasting requirement of the future technical development of medium waves can be met.

The utility model discloses a microwave radar receiver protection structure and method, the microwave radar receiver protection structure comprises a cascade amplitude limiter, the cascade amplitude limiter is arranged behind an antenna sum-difference device, and the cascade amplitude limiter is arranged in front of a receiver radio frequency front end circuit. The cascade amplitude limiter comprises a waveguide plasma amplitude limiter, a micro-strip amplitude limiter and a waveguide coaxial converter, the micro-strip amplitude limiter is cascaded behind the waveguide plasma amplitude limiter, and the waveguide coaxial converter is cascaded behind the micro-strip amplitude limiter. The starting threshold of the micro-strip amplitude limiter is effectively improved compared with the working threshold of other amplitude limiters, so that echo signals can enter a receiver with low loss, and the sensitivity of the receiver is ensured. According to the cascade amplitude limiter, the standing-wave ratio near the working frequency is slightly larger than 1, the loss is low, and the use requirement is met. According to the utility model, two stages of amplitude limiters with different forms are used, so that the high power resistance and the fast response time are improved; a micro-strip amplitude limiter is used to raise a starting threshold.

The invention relates to the field of ultrasonic near-field suspension, in particular to a standing-wave ratio adjusting method suitable for annular vibration flat plate traveling waves, and the method comprises the steps: determining the mechanical resonant frequency in a longitudinal vibration mode required by an ultrasonic suspension transmission device; respectively applying two paths of excitation signals with the same mechanical resonant frequency to the transducer 1 # and the transducer 2 #; analyzing the vibration displacement A of each point on the annular vibration flat plate, and calculating the change condition of the vibration displacement A of each point on the annular vibration flat plate along with theta and time t when the mounting angles of the transducer 1 # and the transducer 2 # are theta, so as to obtain the theta value in a pure traveling wave state under a constant condition; and changing the phase difference theta of the two paths of excitation signals, obtaining the phase difference theta of the excitation signals when the amplitudes of all points on the annular vibration flat plate are equal, solving the actual installation angles of the current transducer 1 # and the transducer 2 # according to the mathematical relationship of the theta sum, adjusting the phase difference theta of the two paths of excitation signals, and obtaining the determined standing-wave ratio.

The invention relates to the technical field of microwaves, in particular to a broadband antenna matching system based on a 4: 1 impedance conversion balun, which comprises the 4: 1 impedance conversion balun, an adjustable impedance matching network, a radio frequency monitoring unit and a logic control unit, the logic control unit is configured to receive forward power and reflection power signals and calculate to obtain a standing-wave ratio or a reflection coefficient under a current working frequency point; comparing the standing-wave ratio or the reflection coefficient with a preset threshold value; based on a comparison result, executing an adaptive matching algorithm, and iteratively generating and outputting a new digital control signal to drive a variable reactance element in the adjustable impedance matching network to change the value of the variable reactance element; and through closed-loop feedback control, the impedance of the adjustable impedance matching network is dynamically optimized. By modifying an algorithm parameter or a lookup table in the logic control unit, the same hardware platform can easily adapt to antennas with different impedance characteristics and different frequency bands. And the design flexibility and the product universality are greatly enhanced.

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.

The invention discloses a voltage standing wave ratio measuring method and device, and relates to the technical field of electronic information, and the method comprises the steps: transmitting a transmitting signal, the transmitting signal comprises a training sequence, the training sequence comprises at least one symbol transmitted at full power, the full power comprises that the difference between the full power and the calibration power of a baseband signal is not greater than a first threshold value, and therefore, the difference between the full power and the calibration power of the baseband signal is not greater than the first threshold value; the power of the target emission signal collected based on the training sequence is not very small, so that the accuracy of a measurement result and the stability in a complex scene are improved.

The invention discloses a method and equipment for improving matching of a measured piece in an attenuation measurement system, belongs to the field of radio metering, and comprises the method for improving matching of the measured piece in the attenuation measurement system, and the core of the method is that a precise matching absorption load is added in a front-end transmission system of the measured piece; energy transmission is realized on a waveguide wide side of the precise matching absorption load through a coupling hole; a transmission waveguide is additionally arranged above the coupling hole, and energy is transmitted to a measured piece in the forward direction; and a precise matching absorption load is added in the reverse direction to absorb energy in the reverse direction, so that the measured piece matching improvement equipment in the attenuation measurement system is formed, and finally the measured piece matching of the attenuation measurement system is improved. According to the method and the equipment, the impedance matching of the measured piece is improved by using the precise matching load, the voltage standing-wave ratio of the load level is realized, and the attenuation measurement accuracy is improved. The tested piece matching improvement equipment developed by using the method is directly connected to two ends of the tested piece in an attenuation measurement system, so that the impedance matching of the tested piece is improved.

This invention provides an output impedance calculation device, which includes: a control unit, an adjustment unit, a LORA transmitting unit, a first impedance calculation unit, a second impedance calculation unit, a matching unit, and a transmitting antenna. The control unit is used to transmit wireless signals; the LORA transmitting unit is used to convert wireless signals into LORA signals; the first impedance calculation unit is used to calculate the input impedance based on the LORA signals; the second impedance calculation unit is used to calculate the output impedance based on the LORA signals; the control unit is used to calculate the reflection coefficient based on the input and output impedances, and to calculate the standing wave ratio based on the transmission coefficient; the adjustment unit is used to adjust the impedance in the circuit based on the standing wave ratio and the reflection coefficient, thereby achieving impedance matching and balance between the input and output terminals of the line, improving the output quality of radio signals, reducing the overall output power consumption, and reducing harmonic interference.

The invention discloses a multi-frequency antenna radiation unit device with a decoupling function, and belongs to the field of mobile communication antennas. The high-frequency radiation unit comprises a balun electrically connected with the reflecting plate and a radiation arm connected to the balun; the low-frequency radiation unit is positioned on the periphery of the high-frequency radiation unit and is arranged on the reflecting plate; the capacitor loading assembly comprises a coupling patch connected with the radiation arm and a capacitor branch connected to the balun, the capacitor branch is located on the side, close to the reflecting plate, of the balun, the coupling patch and the capacitor branch form an additional capacitor connected with the high-frequency radiation unit in parallel, and the total equivalent capacitance of the high-frequency radiation unit is changed through the additional capacitor; therefore, the resonant frequency of the high-frequency radiation unit is shifted out of the low-frequency working frequency band, common-mode resonance generated when the high-frequency radiation unit and the low-frequency radiation unit are adjacently arranged is eliminated, the standing-wave ratio of a low-frequency port is improved, the working bandwidth is widened, distortion of a low-frequency radiation pattern is eliminated, and the coverage quality of a base station is guaranteed.

The invention relates to a DMS type filter and a filtering device, the DMS type filter comprises reflecting gratings and a plurality of IDTs arranged between the reflecting gratings, and each IDT is arranged along the propagation direction of surface acoustic waves; each IDT comprises a plurality of spacing intervals, and each spacing interval is provided with interdigitals which are arranged along the propagation direction of the surface acoustic wave and are sequentially connected end to end; wherein each IDT comprises a main spacing area and a plurality of spacing adjusting areas, the spacing of the interdigitals in the main spacing area is consistent, the spacing of the adjacent interdigitals in each spacing adjusting area monotonically changes in the form of a quadratic power function along the direction far away from the main spacing area, and the variation amplitudes of the spacing of the adjacent interdigitals in different spacing adjusting areas are different. By adjusting the distance between the interdigitals one by one, the design freedom degree is remarkably improved, and therefore the purposes of reducing insertion loss, improving the standing-wave ratio, expanding the bandwidth and the like are achieved so as to adapt to different use scenes, and the application range is widened.

The utility model belongs to the technical field of communication equipment, and particularly relates to a frequency division dual-channel filter, which comprises a cavity cover plate, a device cavity, a connector and a mounting bracket, the device cavity is of a hollow cuboid structure, and an opening is formed in the upper end face of the device cavity. The cavity cover plate is of a flat-plate-shaped structure matched with the opening and fixedly covers the opening in the upper end of the device cavity through evenly-distributed installation screws, and a sealed cavity is formed. According to the utility model, the large cavity design is adopted, and the insertion loss and standing-wave ratio index of a product are effectively improved, so that the transmission quality of communication signals is improved; two input ports and two output ports are arranged, so that when the device is connected with a dual-port device, the device can be connected through a jumper wire; the installation support is additionally designed, so that the product can be installed on a cabling rack, a cabinet or a platform, and installation and maintenance are convenient.

The invention belongs to the technical field of low-altitude radar antenna gain, and discloses a low-altitude surveillance radar X-band antenna gain estimation method and system, and the method comprises the steps: collecting the phase distribution of a radiation unit, the standing-wave ratio of a feed network and other microscopic parameters, and building a correlation model of the microscopic parameters with a mesoscopic multipath signal and macroscopic scene complexity; a transition area correction factor iterator is introduced, temperature compensation, frequency compensation and a multi-level loss correction process are combined, and errors of temperature drift and frequency deviation of the 10-12 GHz frequency band are counteracted; the accuracy of gain estimation in a complex low-altitude environment is improved; constructing a three-dimensional adaptive matrix of the RCS, the maneuvering acceleration and the target type, and forming a three-dimensional correction system in combination with the environment complexity dimension; in a multi-target scene, computing resources are distributed according to the logic that the smaller the RCS is, the larger the maneuvering acceleration is and the higher the priority is, the targets are processed in batches by adopting a time division multiplexing architecture, and the contradiction between the gain response lag of the X-band antenna and the fast maneuvering of the targets is relieved.

The invention provides a radio frequency microwave power amplifier over-standing wave protection system and a protection method thereof. The system comprises a bidirectional coupling module, a dual-path detection module, a signal processing module and a protection execution module, wherein the bidirectional coupling module is used for collecting a forward radio frequency power analog signal and a reverse radio frequency power analog signal; the dual-path detection module is used for generating a forward detection voltage analog signal based on the forward radio frequency power analog signal and generating a reverse detection voltage analog signal based on the reverse radio frequency power analog signal; the signal processing module is used for generating an actual standing-wave ratio based on the forward detection voltage analog signal and the reverse detection voltage analog signal, and generating a control protection signal according to the actual standing-wave ratio; and the protection execution module is used for performing power-off protection on the to-be-protected radio frequency microwave power amplifier based on the control protection signal. The problem that an existing radio frequency microwave power amplifier over standing wave protection scheme cannot be suitable for complex application scenes can be solved.

The application discloses a kind of through type radio frequency microwave vector analysis device and method, device includes radio frequency front end and down conversion module, digital acquisition and processing module and control and interactive module.Radio frequency front end and down conversion module are used for the transmission of radio frequency signal, two-way coupling sampling and coherent down conversion;Digital acquisition and processing module are used for collecting signal and processing, obtain pure incident wave signal and reflected wave signal;Control and interactive module are used for controlling each module, and carry out man-machine interaction.The application is realized by using through type measurement architecture, under the premise that the signal transmission of measured system is not interrupted, realizes the online vector analysis of radio frequency signal, and does not need built-in signal source, and then complete vector parameter such as reflection coefficient, impedance, standing wave ratio can be accurately calculated.

The present disclosure provides a system and a method for monitoring Voltage Standing Wave Ratio (VSWR) in a radio system. The present disclosure monitors Radio Frequency (RF) chain performance and VSWR-related issues in a cost-effective manner. The present disclosure enables real-time monitoring of VSWR levels without a need of any external measurement device. The present disclosure continuously analyses the reflected power and impedance matching within the radio system. The present disclosure detects and identifies potential VSWR anomalies that may lead to signal degradation or equipment failure in advance. The present disclosure improves performance and reliability of the radio system. The present disclosure ensures optimal radio system performance in a cost-effective manner. The present disclosure reduces operating expenses or expenditure (OPEX) cost and failure turnaround time of operators.

The utility model relates to a photovoltaic module which can solve the problems that a communication module in the prior art is low in integration and cannot be produced, popularized and used on a large scale. The photovoltaic module comprises a first cover plate, an antenna structure, a photovoltaic sheet and a second cover plate which are arranged in a stacked mode, a metasurface structure is arranged on the surface of the side, facing the photovoltaic sheet, of the first cover plate, the metasurface structure comprises groove grids distributed periodically, the groove grids are filled with the antenna structure, and the standing-wave ratio of the antenna structure within a preset frequency band is smaller than a preset standing-wave ratio.

The invention relates to the technical field of antennas, in particular to a miniaturized multi-band onboard antenna and a design method thereof. Through an innovative integrated structure of the central main radiator and the asymmetric peripheral parasitic unit, effective coverage of multiple frequency bands and ultra-short wave frequency bands of Beidou No.3 is realized on a single antenna body, two pairs of independent antennas required in a traditional scheme are thoroughly omitted, the equipment space is greatly saved, the weight is reduced, and the cost is reduced. The device is especially suitable for vehicle-mounted, handheld and unmanned aerial vehicle-mounted equipment sensitive to size and weight. Through accurate structural design and optimized electromagnetic coupling, the antenna provided by the invention realizes a good circular polarization characteristic with an axial ratio of less than 3dB at a Beidou B1 frequency point, and ensures stable reception of navigation signals. Meanwhile, in all Beidou working frequency bands and ultra-short wave frequency bands, the voltage standing wave ratio is smaller than 2.5, and it is indicated that the antenna has excellent impedance matching and radiation efficiency in all target frequency bands.

The invention relates to the technical field of microwave antennas, and particularly discloses a ridge waveguide slot antenna array and device with high gain, wide band and high cross-pole ratio, and the structure of the antenna array is as follows: an antenna radiation linear array layer is formed by linear array sub-arrays, and one linear array sub-array is composed of two linear array units; the first feed network layer is composed of a plurality of first feed networks corresponding to the linear array sub-arrays, the center of the first feed network layer is provided with a probe insertion structure, a feed probe is inserted into the first feed network layer, and the first feed networks and the feed probe are in non-contact coupling feed; the second feed network layer is composed of a second feed power division network, a second feed power division channel of the second feed network layer corresponds to the first feed network, the feed probe and the second feed power division channel are in non-contact coupling feed, and a radio frequency signal port is formed in the middle of the bottom face of the second feed power division network layer. On the basis of ensuring the antenna gain performance, the complexity of the feed network is reduced, the impedance matching design of the antenna is simplified, the standing-wave ratio of the antenna is optimized, and the working bandwidth of the antenna is improved.

The present disclosure pertains to a power amplifier system that promotes enhanced signal linearity and overall system efficiency. The system includes a power amplifier with an amplification path for a radio frequency (RF) signal, and detector circuitry operationally linked to sample locations along this path. The detector circuitry captures and transmits signal characteristics of the RF signal. A voltage standing wave ratio (VSWR) quadrant data generator in communication with the detector circuitry generates VSWR quadrant data based on the detected signal characteristics. The baseband circuitry, comprised of a memory unit preconfigured with digital pre-distortion (DPD) coefficients and a DPD processor, controls the shaping of pre-distortion applied to the RF signal based on the VSWR data, thereby enhancing signal linearity. The components of the system interconnect and collaboratively function to optimize the performance and efficiency of the power amplifier system.

The invention provides a slope power division directional coupler which comprises a first input port, a second input port, a first output port and a second output port, the first input port is connected with the first output port through a first strip line, the second input port is connected with the second output port through a second strip line, and the first output port is connected with the second output port through a second strip line. Parallel coupling lines are configured on the first strip line and the second strip line, the coupling gaps of the coupling lines of the slope power division directional coupler adopt waveform function curves to replace linear gaps, the working frequency band can be broadened, the standing-wave ratio can be effectively reduced, the isolation degree of the directional coupler of an antenna can be greatly improved, and the antenna performance can be improved. And the high-isolation communication requirement is met. Meanwhile, the power ratio of the two output ports of the slope power division directional coupler has a large slope, the power ratio changes greatly along with the frequency, the horizontal wave width of the antenna can be converged, and the coverage energy efficiency of the antenna is improved.