Phased array transmitting and receiving circuit and transmitting control method

Abstract

The invention relates to the technical field of communication, particularly discloses a phased array transmitting and receiving circuit and a transmitting control method, and brings double advantages of system structure simplification and performance improvement through highly integrated design of three core links of baseband, frequency conversion and beam control. In the aspect of the structure, the physical size of the circuit is obviously reduced, and the hardware complexity and the manufacturing cost are reduced. In addition, in terms of performance, signal loss and delay are effectively suppressed by shortening an internal signal transmission path. Furthermore, the same signal processing unit uniformly outputs the baseband signal and the beam control signal, so that accurate and low-delay synchronization between data processing and beam pointing adjustment is realized, and the inherent time sequence error of a discrete scheme is avoided.

Description

Technical Field

[0001] The present invention relates to the field of communication technology, and in particular to a phased array transmitting and receiving circuit and a transmitting control method. Background Art

[0002] Phased array technology is an advanced technology that achieves rapid beam scanning or directional transmission and reception by precisely controlling the phase and amplitude of each element in the array antenna. Due to its flexibility in adjusting beam direction without mechanical rotation, high reliability, and rapid response, this technology is widely used in various fields such as radar, communications (such as 5G), and satellite systems.

[0003] In satellite communication applications, increasingly higher requirements are being placed on the integration, volume, and cost of phased array devices. Existing phased array devices supporting satellite terminals generally consist of antenna modules, RF front-ends, frequency conversion modules, baseband modules, etc. These modules are relatively independent, resulting in high device costs and large size. In order to improve device integration, reduce costs, and reduce size, some specific technical solutions have been disclosed in the prior art: Please refer to Figure 1 Patent application number CN221652594U discloses a highly integrated multi-channel communication circuit and satellite communication terminal for satellite communication terminals. It uses the advanced SIP system-level packaging concept to integrate multiple transmitting front-end circuits and multiple receiving front-end circuits into a compact RF front-end module. However, the satellite terminal in this solution only has the functional module of the RF front-end and fails to integrate other key functions such as the frequency conversion module and clock module. Please refer to Figure 2 Patent application number CN209232944U proposes a chip-type dual-frequency airborne satellite communication antenna, which includes an antenna radiator, a radio frequency circuit, a correction network, a digital-to-analog conversion circuit, a signal processing circuit, and a power supply circuit. However, the device has a small number of communication channels and a relatively low degree of integration of its radio frequency circuit, resulting in a high cost. Please refer to Figure 3 Patent application CN107888278A achieves miniaturization, low power consumption, and low cost through design, while also improving R&D efficiency and performance. It also boasts high radiation resistance and versatility, making it suitable for microsatellite systems. However, the terminal utilizes a superheterodyne architecture, with secondary frequency conversion in the transmit chain, which increases system complexity. Furthermore, the terminal solution utilizes two FPGA chips, which also increases costs. Summary of the Invention

[0004] The present invention provides a phased array transmitting and receiving circuit, which reduces redundant modules in the phased array and improves the integration of the phased array. The present invention discloses a phased array transmitting and receiving circuit, characterized by comprising: a baseband link, a frequency conversion link and a beam control link integrated into one; The baseband link includes: a signal processing unit, a balun, an intermediate frequency filter, an intermediate frequency amplifier, an analog-to-digital and digital-to-analog conversion functional unit; The digital baseband signal is output from the signal processing unit and converted into an intermediate frequency signal. The intermediate frequency signal is sequentially processed by the balun, the intermediate frequency filter, and the intermediate frequency amplifier before being input into the frequency conversion link; or, the intermediate frequency signal is sequentially processed by the intermediate frequency amplifier chip, the intermediate frequency filter chip of the baseband link, and the balun chip before being input into the analog-to-digital and digital-to-analog conversion functional unit. The analog-to-digital and digital-to-analog conversion functional unit converts the intermediate frequency signal into a digital baseband signal before inputting it into the signal processing unit. The signal processing unit can also output a beam control signal to a control end of the beam control link.

[0005] Furthermore, it also includes: a clock link, a beam control link, an antenna module and a positioning link integrated with the baseband link and the frequency conversion link; The clock link is configured to generate a clock signal and a local oscillator signal; The beam steering link is configured to beam steer the radio frequency signal based on the beam steering signal; The antenna module is configured to transmit a radio frequency signal obtained after beam control, or receive an external radio frequency signal; The positioning link is configured to provide a positioning function.

[0006] Furthermore, the clock link includes: a digital phase-locked loop and a radio frequency phase-locked loop; The basic clock signal is input to the digital phase-locked loop for phase-locked processing, and the basic clock signal after phase-locked processing is input to the radio frequency phase-locked loop, and the radio frequency phase-locked loop generates a local oscillation signal based on the basic clock signal.

[0007] Furthermore, the frequency conversion link includes: an intermediate frequency filter, a mixer and a microwave filter; The intermediate frequency signal is processed by the intermediate frequency filter and then input into the mixer. The mixer converts the intermediate frequency signal into a radio frequency signal based on the local oscillator signal. The radio frequency signal is processed by the microwave filter and then input into the beam control link. Alternatively, the RF signal is processed by the microwave filter and then input into the mixer, the mixer converts the RF signal into an intermediate frequency signal based on the local oscillator signal, and the intermediate frequency signal is processed by the intermediate frequency filter and then input into the intermediate frequency amplifier.

[0008] Furthermore, the beam control link includes: a sampling unit, a driving amplifier, a power splitter and a packaged antenna; After being sampled by the sampling unit, the RF signal is input into the driving amplifier for power amplification, and then distributed into multiple RF signals by the power divider and input into the packaged antenna for beam steering. The packaged antenna drives the corresponding antenna unit in the antenna module to transmit the beam-controlled RF signal; Alternatively, each antenna unit in the antenna module receives a radio frequency signal respectively, and inputs the radio frequency signal into the packaged antenna for beam control. The packaged antenna inputs the multiple radio frequency signals after beam control into the power divider for signal merging. The combined radio frequency signal is input into the sampling unit for signal sampling and then input into the microwave filter.

[0009] Furthermore, it also includes a maintenance and testing unit; The monitoring unit is configured to monitor the radio frequency signal sampled by the sampling unit; Alternatively, an external calibration signal is introduced into the beam control link to perform array calibration.

[0010] Furthermore, the antenna module includes: a plurality of transmitting antenna units arranged in an array and an electromagnetic band gap; The electromagnetic band gap is arranged around the edge of the antenna module.

[0011] Furthermore, the positioning link includes: an amplifier, a filter and a positioning dual-frequency antenna; The positioning dual-frequency antenna is configured to receive positioning radio frequency signals; The filter is configured to perform filtering processing on the positioning radio frequency signal; The amplifier is configured to amplify the filtered positioning radio frequency signal and output the amplified positioning signal.

[0012] Furthermore, it also includes a first power supply link and a second power supply link; The first power link is configured to supply power to the baseband link and the clock link; The second power link is configured to supply power to the positioning link, the frequency conversion link, and the beam control link.

[0013] On the other hand, the present invention further discloses a phased array transmitting and receiving method, which is implemented using the above-mentioned phased array transmitting and receiving circuit, and the method includes: Generate clock signal and local oscillator signal; generating an intermediate frequency signal and a beam steering signal based on the clock signal; Implementing signal conversion between the intermediate frequency signal and the radio frequency signal based on the local oscillator signal; performing beam steering on the radio frequency signal based on the beam steering signal; Transmit or receive RF signals obtained after beam steering.

[0014] Compared with the prior art, the present invention has at least the following technical effects: In the phased array transmitting and receiving circuit provided by the present invention, This invention achieves the dual advantages of simplified system architecture and improved performance by integrating the three core links of baseband, frequency conversion, and beam steering into a highly integrated design. Structurally, this design significantly reduces the physical size of the circuit, hardware complexity, and manufacturing costs. Furthermore, by shortening the internal signal transmission path, signal loss and latency are effectively suppressed. Furthermore, the baseband signal and beam steering signal are uniformly output by the same signal processing unit, achieving precise, low-latency synchronization between data processing and beam steering, avoiding the timing errors inherent in discrete solutions. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 A schematic diagram of a highly integrated multi-channel communication circuit and a structure of a satellite communication terminal in the prior art; Figure 2 This is a schematic diagram of the structure of a chip-type dual-frequency airborne satellite communication antenna in the prior art; Figure 3 This is a simplified structural diagram of a universal small-sized satellite-borne digital transponder terminal in the prior art; Figure 4 1 is a simplified structural diagram of a phased array transmitting and receiving circuit in Embodiment 1 of the present invention; Figure 5 Schematic diagram of the structure of the phased array transmitting and receiving circuit in the first embodiment of the present invention; Figure 6 This is a flow chart of a method for controlling the transmission and reception of a phased array in a second embodiment of the present invention; DETAILED DESCRIPTION

[0016] The following description of a phased array transmit / receive circuit and transmit control method of the present invention is provided with reference to schematic diagrams, which illustrate preferred embodiments of the present invention. It should be understood that those skilled in the art may modify the present invention described herein while still achieving its advantageous effects. Therefore, the following description should be understood as a general guideline for those skilled in the art and is not intended to limit the present invention.

[0017] The following paragraphs describe the present invention in more detail by way of example with reference to the accompanying drawings. The advantages and features of the present invention will become more apparent from the following description. It should be noted that the drawings are greatly simplified and not to exact scale, and are provided solely for the purpose of assisting in the description of the embodiments of the present invention.

[0018] Example 1 Please refer to Figure 4-Figure 5 This embodiment discloses a phased array transmitting and receiving circuit, including: an integrated baseband link, a frequency conversion link, and a beam control link; wherein the baseband link includes: a signal processing unit, a balun, an intermediate frequency filter, an intermediate frequency amplifier, an analog-to-digital and a digital-to-analog conversion functional unit.

[0019] Specifically, the digital baseband signal is output from the signal processing unit and converted into an intermediate frequency signal, and the intermediate frequency signal is sequentially processed by the balun, the intermediate frequency filter, and the intermediate frequency amplifier before being input into the frequency conversion link; or, the intermediate frequency signal is sequentially processed by the intermediate frequency amplifier chip, the intermediate frequency filter chip of the baseband link, and the balun chip before being input into the analog-to-digital and digital-to-analog conversion functional unit, and the analog-to-digital and digital-to-analog conversion functional unit converts the intermediate frequency signal into a digital baseband signal before inputting into the signal processing unit; The signal processing unit can also output a beam control signal to a control end of the beam control link.

[0020] In this embodiment, a highly integrated design of the three core links—baseband, frequency conversion, and beam steering—brings the dual advantages of simplified system architecture and improved performance. Structurally, this design significantly reduces the physical size of the circuit, hardware complexity, and manufacturing costs. Furthermore, by shortening the internal signal transmission path, signal loss and latency are effectively suppressed. Furthermore, the same signal processing unit outputs both the baseband signal and the beam steering signal, achieving precise, low-latency synchronization between data processing and beam steering, avoiding the timing errors inherent in discrete solutions.

[0021] Specifically, in signal transmission mode, the digital baseband signal is coded and modulated by the signal processing unit and converted into an analog intermediate frequency (IF) signal. This IF signal is converted from single-ended to differential via a balun, then passes through an IF filter to remove out-of-band noise. It is then boosted by an IF amplifier before being output to the frequency conversion link for up-conversion.

[0022] In signal reception mode, the IF signal from the frequency conversion link first passes through an IF amplifier to compensate for link loss. After filtering out-of-band interference through an IF filter, it undergoes differential-to-single-ended conversion via a balun. The analog-to-digital conversion module then converts the signal into a digital baseband signal for demodulation in the signal processing unit. The signal processing unit outputs a beam steering signal through an independent control port, directly driving the beam steering link to adjust the antenna module's phase parameters.

[0023] The bidirectional signal processing architecture eliminates redundant components associated with independent transceiver circuits in traditional solutions, significantly reducing hardware costs. Digital signal processing eliminates noise interference from analog circuits, ensuring the quality of intermediate frequency (IF) signals. The closed-loop control mechanism ensures the real-time and accurate delivery of beam steering signals, providing reliable support for beamforming within the antenna module.

[0024] In a specific embodiment, the signal processing unit refers to an integrated circuit that realizes the generation and processing of digital baseband signals. Specifically, a field programmable gate array (FPGA) that integrates analog-to-digital and digital-to-analog conversion functional units (ADDA) can be selected, wherein the FPGA is configured to complete bidirectional conversion between digital signals and intermediate frequency signals. In addition, the FPGA is also configured to autonomously send data and send debugging signals to the device link for the maintenance function of the link.

[0025] Furthermore, in this embodiment, it also includes: a clock link, an antenna module and a positioning link integrated with the baseband link, the frequency conversion link and the beam control link.

[0026] Specifically, the clock link is configured to generate a clock signal and a local oscillator signal; the beam control link is configured to perform beam control on the radio frequency signal based on the beam control signal; the antenna module is configured to transmit the radio frequency signal obtained after beam control, or receive an external radio frequency signal; the positioning link is configured to provide a positioning function.

[0027] In the phased array transmitting and receiving circuit provided in this embodiment, the circuit uses a single clock link as a unified time and frequency reference, and the clock and local oscillator signals generated by it are respectively supplied to the baseband link and the frequency conversion link. This design not only avoids the need for additional frequency generation circuits, but also reduces the number of independent clock sources, thereby achieving signal synchronization of each link. At the same time, the close integration and collaborative work of the beam control link and the antenna module constitute an efficient beam control closed loop, effectively reducing the signal loss in the transmission path. In addition, while the internally integrated positioning link operates independently to provide key positioning functions, the integrated design also avoids potential interference with the main transceiver signal link. In summary, this circuit integrates the six core links of clock, baseband, frequency conversion, beam control, antenna and positioning into an integrated design, so that each functional module can efficiently collaborate within a single architecture, thereby fundamentally reducing hardware redundancy and significantly reducing physical space occupancy.

[0028] Furthermore, in this embodiment, the clock link includes: a digital phase-locked loop and a radio frequency phase-locked loop.

[0029] The basic clock signal is input to the digital phase-locked loop for phase-locked processing, and the basic clock signal after phase-locked processing is input to the radio frequency phase-locked loop, and the radio frequency phase-locked loop generates a local oscillation signal based on the basic clock signal.

[0030] In this embodiment, a digital phase-locked loop (DPLL) eliminates jitter components in the clock signal through phase comparison and dynamic adjustment. Based on this reference, an RF PLL generates a high-frequency local oscillator signal through frequency division, multiplication, and synthesis. This process integrates the DPL and RF PLL functions into a single package module through integrated circuit design, reducing signal attenuation and electromagnetic interference caused by discrete components in traditional solutions.

[0031] In a specific embodiment, the basic clock signal may be provided externally, or an internal crystal oscillator may be integrated into the clock link to provide the basic clock signal for the digital phase-locked loop.

[0032] Furthermore, in this embodiment, the frequency conversion link includes: an intermediate frequency filter, a mixer, and a microwave filter.

[0033] The intermediate frequency signal is input into the mixer after signal processing through the intermediate frequency filter. The mixer converts the intermediate frequency signal into a radio frequency signal based on the local oscillator signal. The radio frequency signal is input into the beam control link after signal processing through the microwave filter.

[0034] Alternatively, the RF signal is processed by the microwave filter and then input into the mixer, the mixer converts the RF signal into an intermediate frequency signal based on the local oscillator signal, and the intermediate frequency signal is processed by the intermediate frequency filter and then input into the intermediate frequency amplifier.

[0035] Specifically, in signal transmission mode, the IF signal first passes through an IF filter to remove out-of-band spurious signals. The filtered IF signal and the local oscillator signal generated by the phase-locked loop are then up-converted in a mixer to generate an RF signal. This RF signal then passes through a microwave filter to remove harmonic components generated during the mixing process before being output to the beam steering link.

[0036] In signal reception mode, the RF signal received by the antenna is first filtered out of the band by a microwave filter, then down-converted with the local oscillator signal in a mixer to obtain an intermediate frequency signal. Finally, the intermediate frequency filter further suppresses the residual noise before transmitting it to the baseband link.

[0037] In this embodiment, signal conversion is achieved through a single-stage mixer combined with a two-stage filter. The same mixer and filter modules are reused in both the transmit and receive links, reducing both component count and system complexity. Furthermore, the microwave filter's pre-filtering effectively eliminates image interference, harmonic components, and doubled local oscillator leakage, eliminating the need for additional image suppression circuitry in traditional architectures.

[0038] In one specific embodiment, the intermediate frequency filter may be a surface acoustic wave filter, an LC filter (a filter composed of an inductor and a capacitor), or an LTCC (low-temperature co-fired ceramic) filter. Of course, those skilled in the art may select different types of intermediate frequency filters based on practical circumstances, and this is not a specific limitation.

[0039] In another specific embodiment, the mixer may be a single-ended mixer or a balanced mixer. Of course, those skilled in the art may select different types of mixers according to actual conditions, and no specific limitation is made here.

[0040] In another specific embodiment, the microwave filter can be a microstrip line filter, a dielectric resonator filter, or a LTCC filter. Of course, those skilled in the art can select different types of microwave filters according to actual conditions, and no specific limitation is made here.

[0041] Furthermore, in this embodiment, the beam control link includes: a sampling unit, a driving amplifier, a power splitter and a packaged antenna.

[0042] After being sampled by the sampling unit, the RF signal is input into the driving amplifier for power amplification, and then distributed into multiple RF signals by the power divider and input into the packaged antenna for beam control. The packaged antenna drives the corresponding antenna unit in the antenna module to transmit the RF signal after beam control.

[0043] Alternatively, each antenna unit in the antenna module receives a radio frequency signal respectively, and inputs the radio frequency signal into the packaged antenna for beam control. The packaged antenna inputs the multiple radio frequency signals after beam control into the power divider for signal merging. The combined radio frequency signal is input into the sampling unit for signal sampling and then input into the microwave filter.

[0044] In this embodiment, in transmit mode, the RF signal is first captured by a sampling unit to monitor its energy. The signal is then boosted by a driver amplifier, and a power divider evenly distributes the amplified signal across multiple channels. The packaged antenna independently adjusts the phase and amplitude of each signal according to beam steering commands, ultimately driving the corresponding unit in the antenna module to transmit a beam with a specific directionality.

[0045] In the receiving working mode, the RF signal received by each antenna unit is phase and amplitude compensated by the packaged antenna to achieve beam focusing. The power divider combines the multi-channel adjusted signals into a single signal. The sampling unit performs quality detection on the combined signal and outputs it to the subsequent processing module.

[0046] In this embodiment, a multi-channel design is integrated through the packaged antenna, which optimizes the channel design of the link, reduces the number of power dividers, reduces interconnection losses, and makes the overall link structure more compact and the signal path simpler.

[0047] In a specific embodiment, the sampling unit may be a coupler or a power detection chip.

[0048] In another specific embodiment, the driving amplifier may be a power amplifier using GaN (Gallium Nitride) or LDMOS (Laterally Diffused Metal Oxide Semiconductor) technology.

[0049] In another specific embodiment, the power divider may be a microstrip Wilkinson power divider. Of course, those skilled in the art may select different types of power dividers according to actual conditions, and no specific limitation is made here.

[0050] In another specific embodiment, the packaged antenna may be manufactured using LTCC technology or SiP (system-in-package) packaging technology, with a phase shifter and an attenuator integrated therein.

[0051] Furthermore, in this embodiment, a maintenance and testing unit is also included.

[0052] The monitoring unit is used to monitor the radio frequency signal sampled by the sampling unit.

[0053] Alternatively, an external calibration signal is introduced into the beam control link to perform array calibration.

[0054] In a specific embodiment, the maintenance and measurement unit can adopt an integrated microprocessor or a programmable logic device. Monitoring the radio frequency signal sampled by the self-sampling unit refers to real-time parameter measurement of the radio frequency signal output by the beam control link. Specifically, it can be implemented by a power detector or a spectrum analysis module to determine whether the working state of the transmission link deviates from the preset parameter range. Introducing an external calibration signal for array calibration refers to injecting a standard test signal into the beam control link through a signal switching switch. Specifically, it can be implemented by combining a programmable signal generator and a directional coupler to generate a reference signal of known amplitude and phase to adjust the phase weight of the antenna unit.

[0055] Specifically, during normal operation of the phased array system, the maintenance and measurement unit (MMU) collects real-time RF signal power and spectral characteristic parameters from the sampling unit to determine whether each antenna channel has gain anomalies or phase offsets. This triggers an adaptive compensation algorithm to adjust the amplitude and phase parameters of each channel of the AIP chip (antenna-in-package chip). When the system enters maintenance mode, the MMU controls a switch to connect an external calibration signal source to the power divider input. The calibration signal then passes through the driver amplifier and the packaged antenna to form a preset radiation pattern. By comparing the actual pattern with the theoretical pattern, the phase control parameters of each antenna element are dynamically corrected.

[0056] In this embodiment, the calibration signal is allowed to directly access the beam control link, realizing independent calibration of the array, simplifying the calibration process, and more accurately evaluating and adjusting the performance of the array itself, thereby improving maintainability and testability and avoiding interference or errors that may be caused by baseband and frequency conversion links.

[0057] In this embodiment, the antenna module includes: a plurality of transmitting antenna units arranged in an array and an electromagnetic band gap. The electromagnetic band gap is arranged around the edge of the antenna module.

[0058] In this embodiment, by providing an electromagnetic bandgap structure, the effective working angle of the antenna is significantly broadened, so that the antenna can still maintain high radiation efficiency, stable gain and good beam shape when scanning at a large angle away from the forward direction.

[0059] In this embodiment, according to system requirements, 4×4, 8×8, 16×16 or 64×64 transmitting antenna units may be arranged in an array.

[0060] In another specific embodiment, the antenna module includes one or more circles of electromagnetic band gap surrounding the periphery of the array of transmitting antenna elements.

[0061] In another specific embodiment, the electromagnetic band gap may be circular, elliptical, cross-shaped, rectangular, etc.

[0062] In another specific embodiment, the electromagnetic band gap is coplanarly integrated with the antenna element array on the same high-frequency laminate board and laid adjacent to the outer edge of the outermost ring of transmitting antenna elements, thereby physically surrounding the edge of the effective radiation aperture of the antenna module.

[0063] Furthermore, in this embodiment, the positioning link includes an amplifier, a filter and a positioning dual-frequency antenna.

[0064] Specifically, the positioning dual-frequency antenna is configured to receive the positioning radio frequency signal, the filter is configured to filter the positioning radio frequency signal, and the amplifier is configured to amplify the filtered positioning radio frequency signal and output the amplified positioning signal.

[0065] Specifically, the RF signal is first input into a filter for out-of-band noise suppression, eliminating interference signals from non-navigation bands. The filtered signal enters an amplifier for power gain compensation, addressing the amplitude attenuation of the RF signal due to path loss during spatial transmission. The amplified signal is then output to the baseband processing module for demodulation and positioning, thus forming a complete signal reception link. In this process, dual-band reception expands signal coverage, and the cascaded design of the filter and amplifier suppresses interference while enhancing effective signal strength, thereby avoiding positioning errors caused by signal attenuation or noise superposition in traditional single-link structures.

[0066] In a specific embodiment, the positioning link uses a GPS dual-frequency antenna to transmit GPS signals.

[0067] In another specific embodiment, the positioning dual-band antenna may be a dual-band microstrip patch.

[0068] In another specific embodiment, the filter may be a surface acoustic wave filter or a dielectric filter.

[0069] In another specific embodiment, the amplifier may be a low noise amplifier.

[0070] Furthermore, it also includes a first power supply link and a second power supply link.

[0071] The first power link is configured to supply power to the baseband link and the clock link; the second power link is configured to supply power to the positioning link, the frequency conversion link and the beam control link.

[0072] In a specific embodiment, the first power link and the second power link include a direct current-to-direct current (DC-DC) converter and a low voltage linear regulator (LDO).

[0073] Specifically, the DC-DC converter is connected to the input end of the low-voltage linear regulator, and the output end of the low-voltage linear regulator is respectively connected to the baseband link, clock link, positioning link, frequency conversion link and beam control link waiting for the power supply link.

[0074] Through the above configuration, this application achieves a compact power system layout, reduces power losses caused by multi-stage power conversion, and meets the differentiated power quality requirements of different functional circuits. The two-stage architecture effectively blocks interference from switching power supply noise on the RF front end, solving the signal distortion problem caused by insufficient power supply stability in traditional solutions.

[0075] Example 2 Based on the same inventive concept, this embodiment provides a phased array transmitting and receiving method, which is implemented using the phased array transmitting and receiving circuit disclosed in the first embodiment. The method includes the following steps: S1. Generate clock signal and local oscillator signal; S2 generates an intermediate frequency signal and a beam control signal based on the clock signal; S3 based on the local oscillator signal to achieve signal conversion between the intermediate frequency signal and the RF signal; S4. Performing beam steering on the RF signal based on the beam steering signal; S5. Transmit or receive a beam-controlled radio frequency signal.

[0076] The advantages of the phased array transmitting and receiving circuit disclosed in the first embodiment are also possessed by the phased array transmitting and receiving method provided in this embodiment, and will not be described in detail here.

[0077] Various changes and modifications are possible without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is intended to include these modifications and variations.

Claims

1. A phased array transmitting and receiving circuit, characterized in that: include: Integrated baseband link, frequency conversion link and beam control link; The baseband link includes: a signal processing unit, a balun, an intermediate frequency filter, an intermediate frequency amplifier, an analog-to-digital and digital-to-analog conversion functional unit; The digital baseband signal is output from the signal processing unit and converted into an intermediate frequency signal. The intermediate frequency signal is sequentially processed by the balun, the intermediate frequency filter, and the intermediate frequency amplifier before being input into the frequency conversion link; or, the intermediate frequency signal is sequentially processed by the intermediate frequency amplifier chip, the intermediate frequency filter chip of the baseband link, and the balun chip before being input into the analog-to-digital and digital-to-analog conversion functional unit. The analog-to-digital and digital-to-analog conversion functional unit converts the intermediate frequency signal into a digital baseband signal before inputting it into the signal processing unit. The signal processing unit can also output a beam control signal to a control end of the beam control link.

2. The phased array transmitting and receiving circuit according to claim 1, wherein: Also includes: A clock link, an antenna module, and a positioning link integrated with the baseband link, the frequency conversion link, and the beam control link; The clock link is configured to generate a clock signal and a local oscillator signal; The beam steering link is configured to beam steer the radio frequency signal based on the beam steering signal; The antenna module is configured to transmit a radio frequency signal obtained after beam control, or receive an external radio frequency signal; The positioning link is configured to provide a positioning function.

3. The phased array transmitting and receiving circuit according to claim 2, wherein: The clock link includes: a digital phase-locked loop and a radio frequency phase-locked loop; The basic clock signal is input to the digital phase-locked loop for phase-locked processing, and the basic clock signal after phase-locked processing is input to the radio frequency phase-locked loop, and the radio frequency phase-locked loop generates a local oscillation signal based on the basic clock signal.

4. The phased array transmitting and receiving circuit according to claim 2, wherein: The frequency conversion link includes: an intermediate frequency filter, a mixer and a microwave filter; The intermediate frequency signal is processed by the intermediate frequency filter and then input into the mixer. The mixer converts the intermediate frequency signal into a radio frequency signal based on the local oscillator signal. The radio frequency signal is processed by the microwave filter and then input into the beam control link. Alternatively, the RF signal is processed by the microwave filter and then input into the mixer, the mixer converts the RF signal into an intermediate frequency signal based on the local oscillator signal, and the intermediate frequency signal is processed by the intermediate frequency filter and then input into the intermediate frequency amplifier.

5. The phased array transmitting and receiving circuit according to claim 4, wherein: The beam control link includes: a sampling unit, a driving amplifier, a power divider and a packaged antenna; After being sampled by the sampling unit, the RF signal is input into the driving amplifier for power amplification, and then distributed into multiple RF signals by the power divider and input into the packaged antenna for beam steering. The packaged antenna drives the corresponding antenna unit in the antenna module to transmit the beam-controlled RF signal; Alternatively, each antenna unit in the antenna module receives a radio frequency signal respectively, and inputs the radio frequency signal into the packaged antenna for beam control. The packaged antenna inputs the multiple radio frequency signals after beam control into the power divider for signal merging. The combined radio frequency signal is input into the sampling unit for signal sampling and then input into the microwave filter.

6. The phased array transmitting and receiving circuit according to claim 5, wherein: Also includes maintenance and testing unit; The monitoring unit is configured to monitor the radio frequency signal sampled by the sampling unit; Alternatively, an external calibration signal is introduced into the beam control link to perform array calibration.

7. The phased array transmitting and receiving circuit according to claim 2, wherein: The antenna module comprises: a plurality of transmitting antenna units arranged in an array and an electromagnetic band gap; The electromagnetic band gap is arranged around the edge of the antenna module.

8. The phased array transmitting and receiving circuit according to claim 2, wherein: The positioning link includes: an amplifier, a filter and a positioning dual-frequency antenna; The positioning dual-frequency antenna is configured to receive positioning radio frequency signals; The filter is configured to perform filtering processing on the positioning radio frequency signal; The amplifier is configured to amplify the filtered positioning radio frequency signal and output the amplified positioning signal.

9. The phased array transmitting and receiving circuit according to claim 2, wherein: Also included is a first power link and a second power link; The first power link is configured to supply power to the baseband link and the clock link; The second power link is configured to supply power to the positioning link, the frequency conversion link, and the beam control link.

10. A phased array transmitting and receiving method, implemented using the phased array transmitting and receiving circuit according to any one of claims 1 to 9, characterized in that: The method comprises: Generate clock signal and local oscillator signal; generating an intermediate frequency signal and a beam steering signal based on the clock signal; Implementing signal conversion between the intermediate frequency signal and the radio frequency signal based on the local oscillator signal; performing beam steering on the radio frequency signal based on the beam steering signal; Transmit or receive RF signals obtained after beam steering.

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