A phased array transmit / receive circuit and transmit control method

Abstract

This invention relates to the field of communication technology, specifically disclosing a phased array transmit / receive circuit and a transmit control method. By highly integrating the three core links—baseband, frequency conversion, and beam control—it brings the dual advantages of simplified system structure and improved performance. Structurally, this design significantly reduces the physical size of the circuit and lowers hardware complexity and manufacturing costs. Furthermore, in terms of performance, by shortening the internal signal transmission path, signal loss and delay are effectively suppressed. Moreover, by unifying the output of baseband signals and beam control signals from the same signal processing unit, precise and low-latency synchronization between data processing and beam pointing adjustment is achieved, avoiding the timing errors inherent in discrete solutions.

Description

Technical Field

[0001] This 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 Technology

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

[0003] In satellite communication applications, increasingly stringent requirements are being placed on the integration, size, and cost of phased array devices. Existing phased array devices supporting satellite terminals generally consist of antenna modules, RF front-ends, frequency conversion modules, and baseband modules. These modules are relatively independent, resulting in high cost and large size. To improve device integration, reduce cost, and decrease size, some specific technical solutions have been disclosed in the prior art:

[0004] Please refer to Figure 1 Patent application CN221652594U discloses a highly integrated multi-channel communication circuit and satellite communication terminal. It employs an advanced SIP (System-in-Package) concept, integrating 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 possesses the RF front-end functional module and fails to integrate other key functions such as a frequency conversion module and a clock module. Please refer to... Figure 2 Patent application CN209232944U discloses a chip-type dual-frequency airborne satellite communication antenna, which comprises an antenna radiator, radio frequency circuitry, a correction network, a digital-to-analog converter, a signal processing circuit, and a power supply circuit. However, this device has a limited number of communication channels and relatively low integration of its radio frequency circuitry, resulting in high cost. Please refer to... Figure 3 The patent application with publication number CN107888278A achieves miniaturization, low power consumption, and low cost through design, while improving the efficiency and performance indicators of the R&D cycle. It also possesses high radiation resistance and versatility, making it suitable for microsatellite systems. However, the terminal adopts a superheterodyne architecture, in which the transmission link uses double frequency conversion, which increases the system complexity. In addition, the use of two FPGA chips in the terminal solution also leads to increased costs. Summary of the Invention

[0005] This invention provides a phased array transmitting and receiving circuit that reduces redundant modules in the phased array and improves the integration of the phased array.

[0006] This invention discloses a phased array transmitting and receiving circuit, comprising: an integrated baseband link, a frequency conversion link, and a beam control link;

[0007] The baseband link includes: a signal processing unit, a balun, an intermediate frequency filter, an intermediate frequency amplifier, and analog-to-digital and digital-to-analog conversion functional units;

[0008] The digital baseband signal is output from the signal processing unit and converted into an intermediate frequency (IF) signal. The IF signal is then processed sequentially by the balun, the IF filter, and the IF amplifier before being input into the frequency conversion link. Alternatively, the IF signal is processed sequentially by the IF amplifier chip, the IF filter chip of the baseband link, and the balun chip before being input into the analog-to-digital (ADC) and digital-to-analog (DAC) functional unit. The ADC converts the IF signal into a digital baseband signal before inputting it into the signal processing unit.

[0009] The signal processing unit can also output beam control signals to the control terminal of the beam control link.

[0010] 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;

[0011] The clock link is configured to generate a clock signal and a local oscillator signal;

[0012] The beam control link is configured to perform beam control on the radio frequency signal based on the beam control signal.

[0013] The antenna module is configured to transmit radio frequency signals obtained after beam control, or to receive external radio frequency signals;

[0014] The positioning link is configured to provide positioning functionality.

[0015] Furthermore, the clock link includes: a digital phase-locked loop and a radio frequency phase-locked loop;

[0016] A base clock signal is input to the digital phase-locked loop for phase-locking processing. The base clock signal after phase-locking processing is then input to the radio frequency phase-locked loop, which generates a local oscillator signal based on the base clock signal.

[0017] Furthermore, the frequency conversion link includes: an intermediate frequency filter, a mixer, and a microwave filter;

[0018] The intermediate frequency (IF) signal is processed by the IF filter and then input into the mixer. The mixer converts the IF signal into a radio frequency (RF) signal based on the local oscillator signal. The RF signal is processed by the microwave filter and then input into the beam control link.

[0019] Alternatively, the radio frequency signal is processed by the microwave filter and then input into the mixer. The mixer converts the radio frequency signal into an intermediate frequency signal based on the local oscillator signal. The intermediate frequency signal is processed by the intermediate frequency filter and then input into the intermediate frequency amplifier.

[0020] Furthermore, the beam control link includes: a sampling unit, a drive amplifier, a power divider, and a packaged antenna;

[0021] The radio frequency signal is sampled by the sampling unit, then input to the driver amplifier for power amplification, and then distributed into multiple radio frequency signals by the power divider and input to the packaged antenna for beam control. The packaged antenna drives the corresponding antenna unit in the antenna module to transmit the beam-controlled radio frequency signal.

[0022] Alternatively, each antenna element in the antenna module receives a radio frequency (RF) signal and inputs the RF signal into the encapsulated antenna for beam control. The encapsulated antenna then inputs the multiple RF signals after beam control into the power divider for signal combining. The combined RF signal is then input into the sampling unit for signal sampling and finally into the microwave filter.

[0023] Furthermore, it also includes a measurement unit;

[0024] The monitoring unit is used to monitor the radio frequency signal sampled from the sampling unit;

[0025] Alternatively, an external calibration signal can be introduced into the beam control link for array calibration.

[0026] Furthermore, the antenna module includes: a plurality of transmitting antenna elements arranged in an array and an electromagnetic bandgap;

[0027] The electromagnetic bandgap is arranged around the edge of the antenna module.

[0028] Furthermore, the positioning link includes: an amplifier, a filter, and a dual-band positioning antenna;

[0029] The positioning dual-frequency antenna is configured to receive positioning radio frequency signals;

[0030] The filter is configured to filter the positioning radio frequency signal;

[0031] The amplifier is configured to amplify the filtered positioning radio frequency signal and output the amplified positioning signal.

[0032] Furthermore, it also includes a first power link and a second power link;

[0033] The first power link is configured to power the baseband link and the clock link;

[0034] The second power link is configured to supply power to the positioning link, the frequency conversion link, and the beam control link.

[0035] On the other hand, the present invention also discloses a phased array transmission and reception method, implemented using the above-mentioned phased array transmission and reception circuit, the method comprising:

[0036] Generate clock signal and local oscillator signal;

[0037] The intermediate frequency signal and beam control signal are generated based on the clock signal;

[0038] The signal conversion between the intermediate frequency signal and the radio frequency signal is realized based on the local oscillator signal;

[0039] Beam control of radio frequency signals is performed based on the aforementioned beam control signal;

[0040] Transmit or receive radio frequency signals obtained after beam control.

[0041] Compared with the prior art, the present invention has at least the following technical effects:

[0042] In the phased array transmitting and receiving circuit provided by this invention

[0043] This invention achieves a dual advantage of simplified system structure and improved performance by highly integrating the three core links: baseband, frequency conversion, and beam control. Structurally, this design significantly reduces the physical size of the circuit and lowers hardware complexity and manufacturing costs. Furthermore, in terms of performance, shortening the internal signal transmission path effectively suppresses signal loss and delay. Moreover, by unifying the output of baseband and beam control signals from the same signal processing unit, precise and low-latency synchronization between data processing and beam pointing adjustment is achieved, avoiding the timing errors inherent in discrete solutions. Attached Figure Description

[0044] Figure 1 This is a simplified schematic diagram of a highly integrated multi-channel communication circuit and a satellite communication terminal in the prior art.

[0045] Figure 2 This is a simplified schematic diagram of the structure of a chip-type dual-frequency airborne satellite communication antenna in the prior art;

[0046] Figure 3 This is a simplified structural diagram of a general-purpose small spaceborne digital transponder terminal in the prior art;

[0047] Figure 4 This is a simplified schematic diagram of the phased array transmitting and receiving circuit in Embodiment 1 of the present invention;

[0048] Figure 5 This is a schematic diagram of the phased array transmitting and receiving circuit in Embodiment 1 of the present invention;

[0049] Figure 6 This is a flowchart of the phased array transmit and receive control method in Embodiment 2 of the present invention; Detailed Implementation

[0050] The following description, with reference to schematic diagrams, illustrates a phased array transmitting and receiving circuit and a transmitting control method according to the present invention, which represents a preferred embodiment of the invention. It should be understood that those skilled in the art can modify the invention described herein while still achieving its advantageous effects. Therefore, the following description should be understood as being of general knowledge to those skilled in the art and is not intended to limit the invention.

[0051] The invention is described more specifically by way of example in the following paragraphs with reference to the accompanying drawings. The advantages and features of the invention will become clearer from the following description. It should be noted that the drawings are in a very simplified form and use non-precise proportions, and are only used to facilitate and clarify the illustration of the embodiments of the invention.

[0052] Example 1

[0053] Please refer to Figures 4-5 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, and analog-to-digital and digital-to-analog conversion functional units.

[0054] Specifically, the digital baseband signal is output from the signal processing unit and converted into an intermediate frequency (IF) signal. The IF signal is then processed sequentially by the balun, the IF filter, and the IF amplifier before being input into the frequency conversion link. Alternatively, the IF signal is processed sequentially by the IF amplifier chip, the IF filter chip of the baseband link, and the balun chip before being input into the analog-to-digital (ADC) and digital-to-analog (DAC) functional unit. The ADC converts the IF signal into a digital baseband signal before inputting it into the signal processing unit.

[0055] The signal processing unit can also output beam control signals to the control terminal of the beam control link.

[0056] In this embodiment, the highly integrated design of the three core links—baseband, frequency conversion, and beam control—offers the dual advantages of simplified system structure and improved performance. Structurally, this design significantly reduces the physical size of the circuit and lowers hardware complexity and manufacturing costs. Furthermore, in terms of performance, shortening the internal signal transmission path effectively suppresses signal loss and delay. Moreover, by unifying the output of baseband and beam control signals from the same signal processing unit, precise and low-latency synchronization between data processing and beam pointing adjustment is achieved, avoiding the timing errors inherent in discrete solutions.

[0057] Specifically, in signal transmission mode, the digital baseband signal is encoded and modulated by the signal processing unit and then converted into an analog intermediate frequency (IF) signal. This IF signal is then converted from single-ended to differential via a balun, then out-of-band noise is removed by an IF filter, and the signal amplitude is boosted by an IF amplifier before finally being output to the frequency conversion link for up-conversion processing.

[0058] In signal reception mode, the intermediate frequency (IF) signal from the frequency conversion link is first compensated for link loss by an IF amplifier, then filtered to remove out-of-band interference by an IF filter, and finally processed by a balun for differential-to-single-ended conversion. It is then converted into a digital baseband signal by an analog-to-digital converter and input to the signal processing unit for demodulation. The signal processing unit outputs a beam control signal through an independent control port, directly driving the beam control link to adjust the phase parameters of the antenna module.

[0059] The bidirectional signal processing architecture eliminates redundant components introduced by independent transceiver circuits in traditional solutions, significantly reducing hardware costs. Digital signal processing avoids noise interference from analog circuits, ensuring the quality of the intermediate frequency signal. The closed-loop control mechanism ensures the real-time performance and accuracy of the beam control signal, providing a reliable guarantee for beamforming of the antenna module.

[0060] In one 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) integrating analog-to-digital and digital-to-analog conversion (ADDA) functional units can be selected. The FPGA is configured to complete the bidirectional conversion between digital signals and intermediate frequency signals. In addition, the FPGA is also configured to autonomously transmit data and send tuning signals to the device link for link maintenance and testing functions.

[0061] 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.

[0062] 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 external radio frequency signals; and the positioning link is configured to provide positioning functionality.

[0063] In the phased array transmit / receive circuit provided in this embodiment, the circuit uses a single clock link as a unified time and frequency reference. The generated clock and local oscillator signals are supplied to the baseband link and frequency conversion link, respectively. This design not only avoids additional frequency generation circuits but also reduces the number of independent clock sources, achieving signal synchronization across all links. Simultaneously, the tight integration and collaborative operation of the beam control link and antenna module constitute an efficient beam control closed loop, effectively reducing signal loss along the transmission path. Furthermore, the internally integrated positioning link operates independently to provide critical positioning functions, while the integrated design avoids potential interference to the main transmit / receive signal link. In summary, this circuit integrates the six core links—clock, baseband, frequency conversion, beam control, antenna, and positioning—into a single design, enabling efficient collaboration among functional modules within a single architecture. This fundamentally reduces hardware redundancy and significantly minimizes physical space requirements.

[0064] Furthermore, in this embodiment, the clock link includes a digital phase-locked loop and a radio frequency phase-locked loop.

[0065] A base clock signal is input to the digital phase-locked loop for phase-locking processing. The base clock signal after phase-locking processing is then input to the radio frequency phase-locked loop, which generates a local oscillator signal based on the base clock signal.

[0066] In this embodiment, the digital phase-locked loop (PLL) eliminates jitter components in the clock signal through phase comparison and dynamic adjustment mechanisms. The radio frequency (RF) PLL can generate a high-frequency local oscillator signal based on this reference through frequency division, frequency multiplication, and frequency synthesis operations. This process integrates the functions of the digital PLL and the RF PLL into the same package module through integrated circuit design, reducing signal attenuation and electromagnetic interference caused by discrete components in traditional solutions.

[0067] In one specific embodiment, the base clock signal can be provided externally or an internal crystal oscillator can be integrated within the clock link to provide the base clock signal for the digital phase-locked loop.

[0068] Furthermore, in this embodiment, the frequency conversion link includes: an intermediate frequency filter, a mixer, and a microwave filter.

[0069] The intermediate frequency (IF) signal is processed by the IF filter and then input into the mixer. The mixer converts the IF signal into a radio frequency (RF) signal based on the local oscillator signal. The RF signal is processed by the microwave filter and then input into the beam control link.

[0070] Alternatively, the radio frequency signal is processed by the microwave filter and then input into the mixer. The mixer converts the radio frequency signal into an intermediate frequency signal based on the local oscillator signal. The intermediate frequency signal is processed by the intermediate frequency filter and then input into the intermediate frequency amplifier.

[0071] Specifically, in signal transmission mode, the intermediate frequency (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 (PLL) are then up-converted in a mixer to generate an radio frequency (RF) signal. This RF signal is subsequently filtered by a microwave filter to remove harmonic components generated during the mixing process, and finally output to the beam control link.

[0072] In signal reception mode, the radio frequency signal received by the antenna is first filtered out for out-of-band interference by a microwave filter, then down-converted with the local oscillator signal in a mixer to obtain an intermediate frequency signal, and finally transmitted to the baseband link after further suppressing residual noise by an intermediate frequency filter.

[0073] 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 the transmit and receive links, which reduces the number of components and lowers system complexity. In addition, the pre-filtering of the microwave filter effectively filters out image interference, harmonic components, and double local oscillator leakage signals, avoiding the design requirement of additional image suppression circuits in traditional architectures.

[0074] In one specific embodiment, the intermediate frequency filter can be a surface acoustic wave filter, an LC filter (a filter composed of inductors and capacitors), or an LTCC (low-temperature co-fired ceramic) filter. Of course, those skilled in the art can choose different types of intermediate frequency filters according to actual conditions, and no specific limitations are made here.

[0075] In another specific embodiment, the mixer can be a single-ended or balanced mixer. Of course, those skilled in the art can choose different types of mixers according to the actual situation, and no specific restrictions are made here.

[0076] In another specific embodiment, the microwave filter can be a microstrip line filter, a dielectric resonator filter, or an LTCC filter. Of course, those skilled in the art can choose different types of microwave filters according to actual needs, and no specific limitations are made here.

[0077] Furthermore, in this embodiment, the beam control link includes: a sampling unit, a drive amplifier, a power divider, and a packaged antenna.

[0078] The radio frequency signal is sampled by the sampling unit, then input to the driver amplifier for power amplification, and then distributed into multiple radio frequency signals by the power divider and input to the packaged antenna for beam control. The packaged antenna drives the corresponding antenna unit in the antenna module to transmit the beam-controlled radio frequency signal.

[0079] Alternatively, each antenna element in the antenna module receives a radio frequency (RF) signal and inputs the RF signal into the encapsulated antenna for beam control. The encapsulated antenna then inputs the multiple RF signals after beam control into the power divider for signal combining. The combined RF signal is then input into the sampling unit for signal sampling and finally into the microwave filter.

[0080] In this embodiment, in the transmit mode, the radio frequency signal is first partially captured by the sampling unit for monitoring, then the power is boosted by the driver amplifier, and the power divider evenly distributes the amplified signal to multiple channels. The packaged antenna independently adjusts the phase and amplitude of each signal according to the beam control command, ultimately driving the corresponding unit in the antenna module to transmit a beam with a specific directionality.

[0081] In the receiving mode, the radio frequency signals received by each antenna unit are phase and amplitude compensated by the encapsulated 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.

[0082] In this embodiment, the multi-channel design is integrated by encapsulating the antenna, which optimizes the channel design of the link, reduces the number of power divider stages, reduces interconnection losses, and makes the overall link structure more compact and the signal path simpler.

[0083] In one specific embodiment, the sampling unit may be a coupler or a power detection chip.

[0084] In another specific embodiment, the drive amplifier may be a power amplifier using GaN (gallium nitride) or LDMOS (laterally diffused metal oxide semiconductor) technology.

[0085] In another specific embodiment, the power divider can be a microstrip Wilkinson power divider. Of course, those skilled in the art can choose different types of power dividers according to actual needs, and no specific limitations are made here.

[0086] In another specific embodiment, the packaged antenna may be packaged using LTCC process or SiP (System-in-Package) technology, and integrates a phase shifter and attenuator internally.

[0087] Furthermore, in this embodiment, a measurement unit is also included.

[0088] The monitoring unit is used to monitor the radio frequency signal sampled from the sampling unit.

[0089] Alternatively, an external calibration signal can be introduced into the beam control link for array calibration.

[0090] In one specific embodiment, the monitoring unit can employ an integrated microprocessor or a programmable logic device. Monitoring the RF signal sampled by the self-sampling unit refers to real-time parameter measurement of the RF signal output by the beam control link. This can be implemented using a power detector or a spectrum analysis module to determine whether the operating state of the transmit 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. This can be implemented using a combination of a programmable signal generator and a directional coupler to generate a reference signal with known amplitude and phase to adjust the phase weights of the antenna elements.

[0091] Specifically, during normal operation of the phased array system, the monitoring unit collects the RF signal power and spectral characteristic parameters output by the sampling unit in real time to determine whether there are gain anomalies or phase shifts in each antenna channel. This triggers an adaptive compensation algorithm to adjust the amplitude and phase parameters of each channel of the AIP chip (packaged antenna chip). When the system enters maintenance mode, the monitoring unit controls a switch to connect an external calibration signal source to the input of the power divider. The calibration signal passes through the driver amplifier and the packaged antenna in sequence to form a preset radiation pattern. By comparing the difference between the actual radiation pattern and the theoretical radiation pattern, the phase control parameters of each antenna element are dynamically corrected.

[0092] In this embodiment, the calibration signal is allowed to be directly connected to the beam control link, realizing independent calibration of the array, simplifying the calibration process, and enabling more accurate evaluation and adjustment of the array's performance, thereby improving maintainability and testability, and avoiding interference or errors that may be caused by the baseband and frequency conversion links.

[0093] In this embodiment, the antenna module includes: a plurality of transmitting antenna elements arranged in an array and an electromagnetic bandgap. The electromagnetic bandgap is disposed around the edge of the antenna module.

[0094] In this embodiment, by setting an electromagnetic bandgap structure, the effective working angle of the antenna is significantly widened, so that the antenna can still maintain high radiation efficiency, stable gain and good beam shape when scanning at a large angle deviating from the positive direction.

[0095] In this embodiment, depending on the system requirements, there may be 4×4, 8×8, 16×16, or 64×64 transmitting antenna units arranged in an array.

[0096] In another specific embodiment, the antenna module includes one or more electromagnetic band gaps surrounding the periphery of the transmitting antenna element array.

[0097] In another specific embodiment, the electromagnetic band gap can be circular, elliptical, cross-shaped, rectangular, etc.

[0098] In another specific embodiment, the electromagnetic bandgap is coplanarly integrated with the antenna element array on the same high-frequency laminate, and is laid adjacent to the outer edge of the outermost transmitting antenna element, thereby physically surrounding the edge of the effective radiation aperture of the antenna module.

[0099] Furthermore, in this embodiment, the positioning link includes an amplifier, a filter, and a positioning dual-band antenna.

[0100] Specifically, the dual-band antenna is configured to receive positioning radio frequency signals, the filter is configured to filter the positioning radio frequency signals, and the amplifier is configured to amplify the filtered positioning radio frequency signals and output the amplified positioning signal.

[0101] Specifically, the radio frequency (RF) signal is first input to a filter for out-of-band noise suppression, eliminating interference signals from non-navigation frequency bands. The filtered signal then enters an amplifier for power gain compensation, addressing the amplitude attenuation problem caused by path loss during RF signal transmission. The amplified signal is output to the baseband processing module for demodulation and positioning calculation, thus forming a complete signal reception link. In this process, dual-band reception capability expands the signal coverage, and the cascaded design of the filter and amplifier enhances the effective signal strength while suppressing interference, thereby avoiding positioning errors caused by signal attenuation or noise superposition in traditional single-link structures.

[0102] In one specific embodiment, the positioning link uses a GPS dual-frequency antenna to transmit GPS signals.

[0103] In another specific embodiment, the positioning dual-frequency antenna may be a dual-band microstrip patch.

[0104] In another specific embodiment, the filter may be a surface acoustic wave filter or a dielectric filter.

[0105] In another specific embodiment, the amplifier may be a low-noise amplifier.

[0106] Furthermore, it also includes a first power link and a second power link.

[0107] 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.

[0108] In one specific embodiment, the first power link and the second power link include: a DC-DC converter and a low-voltage linear regulator (LDO).

[0109] Specifically, the DC-DC converter is connected to the input terminal of the low-voltage linear regulator, and the output terminal of the low-voltage linear regulator is connected to the baseband link, clock link, positioning link, frequency conversion link, beam control link, and power supply link, respectively.

[0110] Through the above configuration, this application achieves a compact power system layout, reduces power loss caused by multi-stage power conversion, and meets the differentiated power quality requirements of different functional circuits. The two-stage architecture effectively isolates the interference of switching power supply noise on the RF front end, solving the signal distortion problem caused by insufficient power supply stability in traditional solutions.

[0111] Example 2

[0112] Based on the same inventive concept, this embodiment provides a phased array transmission and reception method, implemented using the phased array transmission and reception circuit disclosed in Embodiment 1. The method includes the following steps:

[0113] S1. Generate clock signal and local oscillator signal;

[0114] S2. Generate an intermediate frequency signal and a beam control signal based on the clock signal;

[0115] S3. Based on the local oscillator signal, realize the signal conversion between the intermediate frequency signal and the radio frequency signal;

[0116] S4. Perform beam control on the radio frequency signal based on the beam control signal;

[0117] S5. Transmit or receive radio frequency signals obtained after beam control.

[0118] The phased array transmit and receive circuit disclosed in Embodiment 1 also possesses the advantages of the phased array transmit and receive method provided in this embodiment, and will not be repeated here.

[0119] Various modifications and variations are possible without departing from the spirit and scope of the invention. Thus, if these modifications and variations of the invention fall within the scope of the claims of the invention and their equivalents, the invention is also intended to include these modifications and variations.

Claims

1. A phased array transmitting and receiving circuit, characterized in that, include: Integrated design of baseband link, frequency conversion link and beam control link; And, antenna module; The baseband link includes: a signal processing unit, a balun, an intermediate frequency filter, an intermediate frequency amplifier, and analog-to-digital and digital-to-analog conversion functional units; The digital baseband signal is output from the signal processing unit and converted into an intermediate frequency (IF) signal. The IF signal is then processed sequentially by the balun, the IF filter, and the IF amplifier before being input into the frequency conversion link. Alternatively, the IF signal is processed sequentially by the IF amplifier chip, the IF filter chip of the baseband link, and the balun chip before being input into the analog-to-digital (ADC) and digital-to-analog (DAC) functional unit. The ADC converts the IF signal into a digital baseband signal before inputting it into the signal processing unit. The signal processing unit can also output beam control signals to the beam control link for control. The frequency conversion link includes: an intermediate frequency filter, a mixer, and a microwave filter; The intermediate frequency (IF) signal is processed by the IF filter and then input into the mixer. The mixer converts the IF signal into a radio frequency (RF) signal based on the local oscillator signal. The RF signal is processed by the microwave filter and then input into the beam control link. The beam control link includes: a sampling unit, a drive amplifier, a power divider, and a packaged antenna; The radio frequency signal is sampled by the sampling unit, then input to the driver amplifier for power amplification, and then distributed into multiple radio frequency signals by the power divider and input to the packaged antenna for beam control. The packaged antenna drives the corresponding antenna unit in the antenna module to transmit the beam-controlled radio frequency signal. The phased array transmit and receive circuit further includes a monitoring unit, which is used to monitor the radio frequency signal sampled from the sampling unit; or to introduce an external calibration signal into the beam control link for array calibration.

2. The phased array transmitting and receiving circuit as described in claim 1, characterized in that, Also includes: The clock link, the antenna module, and the positioning link are 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 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 radio frequency signals obtained after beam control, or to receive external radio frequency signals; The positioning link is configured to provide positioning functionality.

3. The phased array transmitting and receiving circuit as described in claim 2, characterized in that, The clock link includes: a digital phase-locked loop and an radio frequency phase-locked loop; A base clock signal is input to the digital phase-locked loop for phase-locking processing. The base clock signal after phase-locking processing is then input to the radio frequency phase-locked loop, which generates a local oscillator signal based on the base clock signal.

4. The phased array transmitting and receiving circuit as described in claim 2, characterized in that, The radio frequency signal is processed by the microwave filter and then input into the mixer. The mixer converts the radio frequency signal into an intermediate frequency signal based on the local oscillator signal. 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 as described in claim 4, characterized in that, Each antenna element in the antenna module receives radio frequency (RF) signals and inputs the RF signals into the encapsulated antenna for beam control. The encapsulated antenna inputs the multiple RF signals after beam control into the power divider for signal combining. The combined RF signals are then input into the sampling unit for signal sampling and then into the microwave filter.

6. The phased array transmitting and receiving circuit as described in claim 2, characterized in that, The antenna module includes: multiple transmitting antenna elements arranged in an array and an electromagnetic bandgap; The electromagnetic bandgap is arranged around the edge of the antenna module.

7. The phased array transmitting and receiving circuit as described in claim 2, characterized in that, The positioning link includes: an amplifier, a filter, and a dual-band positioning antenna; The positioning dual-frequency antenna is configured to receive positioning radio frequency signals; The filter is configured to filter the positioning radio frequency signal; The amplifier is configured to amplify the filtered positioning radio frequency signal and output the amplified positioning signal.

8. The phased array transmitting and receiving circuit as described in claim 2, characterized in that, It also includes a first power link and a second power link; The first power link is configured to power 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.

9. A phased array transmission and reception method, implemented using the phased array transmission and reception circuit as described in any one of claims 1-8, characterized in that, The method includes: Generate clock signal and local oscillator signal; The intermediate frequency signal and beam control signal are generated based on the clock signal; The signal conversion between the intermediate frequency signal and the radio frequency signal is realized based on the local oscillator signal; Beam control of radio frequency signals is performed based on the aforementioned beam control signal; Transmit or receive radio frequency signals obtained after beam control.

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