A miniaturized multi-channel direction-finding receiving device

Abstract

The present invention provides a miniaturized multi-channel direction-finding receiving device, which relates to the field of radio direction-finding technology. The device includes a signal receiving module, a signal processing module, a storage module, a calibration module, and a calibration antenna. The signal receiving module is connected to the signal processing module and the calibration module, respectively. The signal processing module is connected to the calibration module and the storage module, and the calibration module is connected to the calibration antenna. The signal receiving module is used to receive radio frequency signals and intermediate frequency signals and send them to the signal processing module. The signal processing module is used to generate a calibration source signal and a phase calibration table based on the radio frequency signal and the intermediate frequency signal. A control switch is switched. The storage module is used to store phase correction table data. The calibration module is used to generate a calibration signal based on the calibration source signal and the phase calibration table. The calibration antenna is used to receive the calibration signal emitted by the calibration module and perform an outer loop calibration operation. The present invention solves the problem of low operating accuracy of direction-finding receivers.

Description

Technical Field

[0001] The present invention relates to the field of radio direction finding technology, and in particular to a miniaturized multi-channel direction finding receiving device. Background Art

[0002] Modern reconnaissance and direction-finding receivers face numerous challenges within traditional, bloated systems. They operate over a wide and high frequency band, ranging from hundreds of MHz to tens of GHz. However, due to the limitations of existing analog-to-digital converters, direct digital processing at the antenna backend is impossible. Typically, a superheterodyne receiver is employed, which involves downconverting the RF signal from the antenna to an intermediate frequency (IF) before processing. However, during this process, the IF signal reaching the phase detector must pass through numerous modules, including the antenna unit, RF channel, and frequency conversion channel. The sheer number of these modules and the bulky design of traditional systems make it difficult to ensure consistent amplitude and phase characteristics. Furthermore, variations in the length of the local oscillator connecting cables can cause significant phase variations due to the system's size and complexity. Phase inconsistencies between channels are particularly pronounced in traditional, bloated systems, significantly degrading the direction-finding equipment's performance. Summary of the Invention

[0003] In view of the above-mentioned deficiencies in the prior art, the present invention provides a miniaturized multi-channel direction-finding receiving device that solves the problem of low working accuracy of direction-finding receivers.

[0004] In order to achieve the above-mentioned object of the invention, the technical solution adopted by the present invention is: a miniaturized multi-channel direction finding receiving device, comprising: a signal receiving module, a signal processing module, a storage module, a calibration module and a calibration antenna; wherein the signal receiving module is respectively connected to the signal processing module, the signal processing module is connected to the calibration module and the storage module, and the calibration module is connected to the calibration antenna;

[0005] A signal receiving module is used to receive radio frequency signals and intermediate frequency signals, and send the received radio frequency signals and intermediate frequency signals to the signal processing module;

[0006] a signal processing module, configured to generate a calibration source signal and a phase calibration table based on the radio frequency signal and the intermediate frequency signal; and a control switch;

[0007] A storage module, used for storing phase correction table data;

[0008] A calibration module, configured to generate a calibration signal based on the calibration source signal and a phase calibration table;

[0009] The calibration antenna is used to receive the calibration signal sent by the calibration module and perform external loop calibration operations.

[0010] Furthermore, the signal receiving module includes: a radio frequency input connector 1, an intermediate frequency input connector 2, a switch 1, a switch 2, a switch 3, a switch 4, a switch 5, a switch 6, a switch 7, a switch 8, an attenuator 1, an attenuator 2, an amplifier 1, filters 1 to 10, a frequency conversion channel, and an analog-to-digital conversion unit; wherein the 4th pin of the switch 1 is connected to the radio frequency input connector 1, the 1st pin of the switch 1 is connected to the 1st pin of the switch 2, the 2nd pin of the switch 1 is connected to one end of the attenuator 1, the other end of the attenuator 1 is connected to the 2nd pin of the switch 2, and the 3rd pin of the switch 1 is connected to the 1st pin of the amplifier 1. The input end is connected, the output end of amplifier one is connected to pin 3 of switch two, pin 4 of switch two is connected to IF input connector two, pin 5 of switch two is connected to one end of attenuator two, the other end of attenuator two is connected to pin 5 of switch four, pin 1 of switch four is connected to pin 5 of switch three, pin 2 of switch four is connected to one end of filter five, the other end of filter five is connected to pin 2 of switch six, pin 3 of switch four is connected to one end of filter six, the other end of filter six is connected to pin 3 of switch six, and pin 4 of switch four is connected to pin 5 of switch seven. Connect, the first pin of switch three is connected to one end of filter one, the other end of filter one is connected to the first pin of switch five, the second pin of switch three is connected to one end of filter two, the other end of filter two is connected to the second pin of switch five, the third pin of switch three is connected to one end of filter three, the other end of filter three is connected to the third pin of switch five, the fourth pin of switch three is connected to one end of filter four, the other end of filter four is connected to the fourth pin of switch five, the fifth pin of switch five is connected to the first pin of switch six, the first pin of switch seven is connected to one end of filter seven, and the filter The other end of the filter seven is connected to the first pin of the switch eight, the second pin of the switch seven is connected to one end of the filter eight, the other end of the filter eight is connected to the second pin of the switch eight, the third pin of the switch seven is connected to one end of the filter nine, the other end of the filter nine is connected to the third pin of the switch eight, the fourth pin of the switch seven is connected to one end of the filter ten, the other end of the filter ten and the fifth pin of the switch six are both connected to one end of the frequency conversion channel, the fourth pin of the switch eight is connected to the fourth pin of the switch six, the other end of the frequency conversion channel is connected to the analog-to-digital conversion unit, and the analog-to-digital conversion unit is connected to the signal processing module.

[0011] Furthermore, the frequency conversion channel includes: amplifier 2, amplifier 3, amplifier 4, filter 11, filter 12, local oscillator 1, local oscillator 2, switch 9, mixer 1, mixer 2, mixer 3 and attenuator 3; wherein the 5th pin of switch 6 is connected to the input end of amplifier 2, the other end of filter 10 is connected to the input end of amplifier 3, the output end of amplifier 2 is connected to the 1st pin of mixer 1, the 3rd pin of mixer 1 is connected to one end of local oscillator 1, the 2nd pin of mixer 1 is connected to one end of filter 11, and the other end of filter 11 is connected to switch 6. The first pin of switch nine is connected, the output end of amplifier three is connected to the first pin of mixer two, the second pin of mixer two is connected to one end of filter twelve, the third pin of mixer two is connected to the other end of local oscillator one, the other end of filter twelve is connected to the second pin of switch nine, the third pin of switch nine is connected to the first pin of mixer three, the third pin of mixer three is connected to local oscillator two, the second pin of mixer three is connected to the input end of amplifier four, the output end of amplifier four is connected to one end of attenuator three, and the other end of attenuator three is connected to the analog-to-digital conversion unit.

[0012] Furthermore, the analog-to-digital conversion unit includes: a switch 10, a switch 11, a switch 12, a filter 13, a filter 14 and an amplifier 5; wherein the third pin of the switch 10 is connected to the other end of the attenuator 3, the first pin of the switch 10 is connected to one end of the filter 13, the other end of the filter 13 is connected to the first pin of the switch 11, the second pin of the switch 10 is connected to one end of the filter 14, the other end of the filter 14 is connected to the second pin of the switch 11, the third pin of the switch 11 is connected to the third pin of the switch 12, the second pin of the switch 12 is connected to the input end of the amplifier 5, and the first pin of the switch 12 and the output end of the amplifier 5 are both connected to the signal processing module.

[0013] Furthermore, the signal processing module includes an intermediate frequency processor, an ADC transceiver chip, a clock chip and a voltage conversion chip; wherein, one end of the ADC transceiver chip is respectively connected to the first pin of switch 12, the output end of amplifier 5 and the calibration module, one end of the voltage conversion chip is connected to the inner loop calibration unit and the outer loop calibration unit, and the intermediate frequency processor is respectively connected to the other end of the ADC transceiver chip, the clock chip, the other end of the voltage conversion chip and the storage module.

[0014] Furthermore, the calibration module includes: a calibration source and a power splitter; wherein the input end of the calibration source is connected to the other end of the signal processing module, and the output end of the calibration source is connected to the calibration antenna and the power splitter respectively.

[0015] The beneficial effects of the present invention are as follows: (1) the signal receiving module, calibration source module, control unit, monitoring module, direction finding radio frequency module, etc. are integrated and optimized in a small chassis, which simplifies the overall structure, effectively avoids the traditional complex wiring logic control and software and hardware coordination processing, and reduces the complexity of system design and implementation; (2) the integrated self-check function is adopted, and the single-board operation mode is adopted, which does not require multiple modules to work together. When the system fails, maintenance work can be carried out directly by plugging and unplugging related components, which greatly improves maintenance efficiency and reduces maintenance costs and difficulty. (3) Only one temperature sensor data needs to be collected to realize the automatic update of the internal and external circulation calibration table of the entire system, which can better adapt to temperature changes, improve the stability of the system in different temperature environments, and ensure the accuracy of phase calibration. (4) Through miniaturization design, the ADC transceiver chip is directly connected, which saves costs while ensuring accuracy, improves system reliability, and enhances the competitiveness of the system in practical applications. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] This specification will be further described in the form of exemplary embodiments, which will be described in detail with reference to the accompanying drawings. These embodiments are not limiting, and in these embodiments, like numbers represent like structures, wherein:

[0017] Figure 1 is an exemplary schematic diagram of a miniaturized multi-channel direction finding receiving device according to some embodiments of this specification;

[0018] Figure 2 is an exemplary schematic diagram of a signal receiving module according to some embodiments of this specification. DETAILED DESCRIPTION

[0019] The specific embodiments of the present invention are described below to facilitate understanding of the present invention by those skilled in the art. However, it should be clear that the present invention is not limited to the scope of the specific embodiments. For those skilled in the art, as long as various changes are within the spirit and scope of the present invention as defined and determined by the appended claims, these changes are obvious, and all inventions and creations utilizing the concepts of the present invention are protected.

[0020] Example

[0021] Figure 1 This is an exemplary schematic diagram of a miniaturized multi-channel direction-finding receiving device according to some embodiments of this specification.

[0022] like Figure 1As shown, a miniaturized multi-channel direction-finding receiving device includes a signal receiving module, a signal processing module, a storage module, a calibration module and a calibration antenna; wherein the signal receiving module is connected to the signal processing module and the calibration module respectively, the signal processing module is connected to the calibration module and the storage module, and the calibration module is connected to the calibration antenna.

[0023] The signal receiving module is used to receive radio frequency signals and intermediate frequency signals, and send the received radio frequency signals and intermediate frequency signals to the signal processing module.

[0024] The signal processing module is used to generate a calibration source signal and a phase calibration table based on the radio frequency signal and the intermediate frequency signal; and control the switching of the switch.

[0025] The storage module is used to store phase correction table data.

[0026] The calibration module is used to generate a calibration signal based on the calibration source signal and the phase calibration table.

[0027] The calibration antenna is used to receive the calibration signal sent by the calibration module and perform external loop calibration operations.

[0028] In some embodiments, as Figure 2 As shown, the numbers 1-5 in the accompanying drawings represent the pin numbers.

[0029] In some embodiments, as Figure 2As shown, the signal receiving module includes: RF input connector 1, intermediate frequency input connector 2, switch 1, switch 2, switch 3, switch 4, switch 5, switch 6, switch 7, switch 8, attenuator 1, attenuator 2, amplifier 1, filters 1 to 10, frequency conversion channel and analog-to-digital conversion unit; wherein, the 4th pin of switch 1 is connected to the RF input connector 1, the 1st pin of switch 1 is connected to the 1st pin of switch 2, the 2nd pin of switch 1 is connected to one end of attenuator 1, the other end of attenuator 1 is connected to the 2nd pin of switch 2, and the 3rd pin of switch 1 is connected to the input end of amplifier 1. Connect the output of amplifier one to pin 3 of switch two, pin 4 of switch two to IF input connector two, pin 5 of switch two to one end of attenuator two, the other end of attenuator two to pin 5 of switch four, pin 1 of switch four to pin 5 of switch three, pin 2 of switch four to one end of filter five, the other end of filter five to pin 2 of switch six, pin 3 of switch four to one end of filter six, the other end of filter six to pin 3 of switch six, and pin 4 of switch four to pin 5 of switch seven. , the first pin of switch three is connected to one end of filter one, the other end of filter one is connected to the first pin of switch five, the second pin of switch three is connected to one end of filter two, the other end of filter two is connected to the second pin of switch five, the third pin of switch three is connected to one end of filter three, the other end of filter three is connected to the third pin of switch five, the fourth pin of switch three is connected to one end of filter four, the other end of filter four is connected to the fourth pin of switch five, the fifth pin of switch five is connected to the first pin of switch six, the first pin of switch seven is connected to one end of filter seven, the filter The other end of switch seven is connected to the first pin of switch eight, the second pin of switch seven is connected to one end of filter eight, the other end of filter eight is connected to the second pin of switch eight, the third pin of switch seven is connected to one end of filter nine, the other end of filter nine is connected to the third pin of switch eight, the fourth pin of switch seven is connected to one end of filter ten, the other end of filter ten and the fifth pin of switch six are both connected to one end of the frequency conversion channel, the fourth pin of switch eight is connected to the fourth pin of switch six, the other end of the frequency conversion channel is connected to the analog-to-digital conversion unit, and the analog-to-digital conversion unit is connected to the signal processing module.

[0030] The analog-to-digital conversion unit may include an ADC transceiver chip.

[0031] In some embodiments, as Figure 2As shown, the frequency conversion channel includes: amplifier 2, amplifier 3, amplifier 4, filter 11, filter 12, local oscillator 1, local oscillator 2, switch 9, mixer 1, mixer 2, mixer 3 and attenuator 3; wherein, the 5th pin of switch 6 is connected to the input end of amplifier 2, the other end of filter 10 is connected to the input end of amplifier 3, the output end of amplifier 2 is connected to the 1st pin of mixer 1, the 3rd pin of mixer 1 is connected to one end of local oscillator 1, the 2nd pin of mixer 1 is connected to one end of filter 11, and the other end of filter 11 is connected to switch 9. The first pin of the output terminal of the amplifier three is connected to the first pin of the mixer two, the second pin of the mixer two is connected to one end of the filter twelve, the third pin of the mixer two is connected to the other end of the local oscillator one, the other end of the filter twelve is connected to the second pin of the switch nine, the third pin of the switch nine is connected to the first pin of the mixer three, the third pin of the mixer three is connected to the local oscillator two, the second pin of the mixer three is connected to the input end of the amplifier four, the output end of the amplifier four is connected to one end of the attenuator three, and the other end of the attenuator three is connected to the analog-to-digital conversion unit.

[0032] In some embodiments, as Figure 2 As shown, the analog-to-digital conversion unit includes: a switch 10, a switch 11, a switch 12, a filter 13, a filter 14 and an amplifier 5; wherein, the third pin of the switch 10 is connected to the other end of the attenuator 3, the first pin of the switch 10 is connected to one end of the filter 13, the other end of the filter 13 is connected to the first pin of the switch 11, the second pin of the switch 10 is connected to one end of the filter 14, the other end of the filter 14 is connected to the second pin of the switch 11, the third pin of the switch 11 is connected to the third pin of the switch 12, the second pin of the switch 12 is connected to the input end of the amplifier 5, and the first pin of the switch 12 and the output end of the amplifier 5 are both connected to the signal processing module.

[0033] In some embodiments, the signal processing module includes an intermediate frequency processor, an ADC transceiver chip, a clock chip and a voltage conversion chip; wherein, one end of the ADC transceiver chip is respectively connected to the first pin of switch 12, the output end of amplifier 5 and the calibration module, one end of the voltage conversion chip is connected to the inner loop calibration unit and the outer loop calibration unit, and the intermediate frequency processor is respectively connected to the other end of the ADC transceiver chip, the clock chip, the other end of the voltage conversion chip and the storage module.

[0034] The signal processing module can be used to obtain and save phase correction tables at different temperatures for direction finding phase calibration.

[0035] The storage module can be a Nand-flash memory for storing relevant data, such as a phase correction table, etc., wherein the Nand-flash memory is connected to the intermediate frequency processor, the other end of the ADC transceiver chip, the clock chip, and the other end of the voltage conversion chip.

[0036] In some embodiments, the calibration module includes: a calibration source and a power splitter; wherein the input end of the calibration source is connected to the other end of the signal processing module, and the output end of the calibration source is connected to the calibration antenna and the power splitter respectively.

[0037] The calibration module may include a calibration source and a power divider; the calibration source is connected to the signal processing module, and generates a calibration signal under the control of the signal processing module. The output end of the calibration source is respectively connected to the calibration antenna and the power divider, and the output end of the power divider is connected to the second signal input end of the switch in each signal receiving component.

[0038] In some embodiments, the pin connection relationship of the miniaturized multi-channel direction finding receiving device is shown in Table 1.

[0039] Table 1 Pin connection relationship of miniaturized multi-channel direction finding receiver

[0040]

[0041] The calibration antenna can be used to receive signals from the calibration module and perform external loop calibration and other operations.

[0042] In some embodiments, the signal processing module acquires RF signals via switch 1, uses filters 1-10 to transmit the filtered signals through a frequency conversion channel to an analog-to-digital conversion unit for analog-to-digital conversion, and uses switch 12 to send the converted signals to the signal processing module. The signal processing module uses an ADC transceiver chip to receive and store the signals and control the calibration signal source, generating corresponding carrier signals and amplitude information to facilitate the corresponding operating frequency bands of the antenna and power divider. The signals received in the corresponding frequency band of the antenna are transmitted to the switch matrix for switching the corresponding frequency band selection and channel output, and then returned to the channel receiver (downconverter) to generate the corresponding intermediate frequency output signal, which is then transmitted to the intermediate frequency receiving (IF) unit of the corresponding channel. The signal processing module completes the calibration process when it monitors the corresponding frequency band carrier signal and amplitude information generated by the control.

[0043] In some embodiments, a miniaturized multi-channel direction finding receiving device may further include a switch matrix unit and a direction finding channel unit.

[0044] The switch matrix unit comprises several key components that work together to achieve efficient signal processing and distribution. The antenna matching feed, an integrated channel in the switch matrix, applies DC power to the RF cable, which in turn feeds the antenna's receiving signal, ensuring proper antenna operation and excellent signal reception. The low-noise amplifier (LNA) amplifies the signal gain of the corresponding signal channel connected to the antenna, enhancing signal strength while minimizing noise interference and improving signal quality. The monitoring selector switch connects to the corresponding antenna receiving channel, switching between monitoring and direction-finding functions for flexible signal flow adjustment in different operating modes. The power splitter connects to the corresponding output port of the calibration source and distributes the calibration source's output signal with consistent amplitude and phase, ensuring accuracy and consistency across all channels. The single-pole double switch (SPDS) divides the frequency and amplitude information of the calibration source integrated into the miniaturized multi-channel receiver into two, providing optimal signal distribution for subsequent signal processing and calibration operations.

[0045] The direction-finding channel unit encompasses multiple functional modules that work together to perform signal processing and direction-finding functions. The RF operating mode switching unit is responsible for flexibly switching RF operating modes based on system requirements, adapting to varying signal environments and operating requirements. The frequency conversion unit is responsible for converting received RF signals to a frequency suitable for subsequent processing, ensuring that the signals can be effectively analyzed and processed within the system. The reference unit provides a stable reference signal for the entire direction-finding channel, ensuring accurate and consistent signal processing. The system clock unit provides a unified clock signal to each module within the direction-finding channel unit, ensuring that they operate collaboratively and in a synchronized manner, improving overall system performance and stability.

[0046] In the switch matrix unit assembly, the antenna matching feed ensures the stability of the antenna receiving signal, laying a good foundation for subsequent signal processing. The low-noise amplifier effectively improves the signal strength, and its gain amplification factor can be optimized according to actual needs, while reducing noise interference and improving the signal-to-noise ratio. The integrated design of each unit module reduces the number of connecting components and external interfaces, reducing the probability of failure caused by loose connections, poor contact and other problems. By integrating all unit modules into a small integrated device, the size and weight of the equipment are reduced. Compared with traditional systems, the device of the present invention can be reduced in size by 300% and in weight by 200%, making it easy to carry and move, and suitable for a variety of scenarios, such as field operations, temporary monitoring points, etc. This makes the deployment of the equipment in different environments more convenient and improves the versatility and practicality of the equipment.

[0047] In some embodiments, a miniaturized multi-channel direction finding receiving device may further include a switch control unit, an inner loop calibration unit, an outer loop calibration unit, and a temperature compensation unit; wherein, the switch control unit is connected to one end of the switch matrix, the other end of the switch matrix is connected to the signal receiving module through the direction finding channel unit, and the inner loop calibration unit and the outer loop calibration unit are connected to the signal processing module.

[0048] In some embodiments, the inner loop calibration unit and the outer loop calibration unit are connected to the intermediate frequency processor via a voltage conversion unit of the signal processing module.

[0049] In some embodiments, the output of the calibration source is fed back to the switch matrix through the calibration antenna to control the operation of the switch matrix.

[0050] The switch control unit can be used to control the switching of switches in each signal receiving component.

[0051] When the switch is switched to the second signal input terminal, the inner loop calibration unit can perform phase detection on the signals output by the reference channel and the phase measurement channel through the analog-to-digital conversion module at different temperatures, obtain the phase errors of each phase measurement channel at different temperatures, form an inner loop calibration table and save it.

[0052] When the switch is switched to the first signal input terminal, the external loop calibration unit can perform phase detection on the signals output by the reference channel and the phase measurement channel through the analog-to-digital conversion module in a darkroom, obtain the phase error of the signal receiving component where each phase measurement channel is located at the current temperature, form an external loop calibration table and save it.

[0053] The temperature compensation unit can use the outer loop calibration table to compensate the inner loop calibration table, obtain the phase error of the signal receiving component where each phase measurement channel is located at different temperatures, generate a phase correction table and save it for use in direction finding phase calibration.

[0054] In some embodiments, the inner loop calibration process is that the signal processing module controls the calibration source to generate a point frequency modulated pulse signal with a step of 1 MHz within the working frequency band, and at the same time controls the switch of each signal receiving component to switch to the second signal input terminal. The calibration source signal enters the frequency conversion channel of each component through the power divider and is transmitted to the signal processing module. The signal processing module calculates the phase error of the reference and phase measurement channel output signals at different temperatures to generate an inner loop calibration table for storage.

[0055] In some embodiments, the external loop calibration process is as follows: the signal processing module controls the calibration source to generate a point frequency modulated pulse signal with a step of 1 MHz within the working frequency band, the control switch is switched to the first signal input terminal, the calibration source signal is transmitted through the calibration antenna, and the receiving signal of each component enters the frequency conversion channel through the relevant components and is transmitted to the signal processing module. The signal processing module calculates the phase error of the component where each phase measurement channel is located at the current temperature for phase detection of the reference and phase measurement channel output signals in a darkroom to generate an external loop calibration table for storage.

[0056] In some embodiments, the temperature compensation process involves the following: the signal processing module uses information from the inner and outer loop calibration tables to subtract the phase error of the phase measurement channel from the phase error of the component at the same temperature to obtain a difference (i.e., the phase error caused by the component corresponding to that channel). The inner loop calibration table is then used to compensate for this difference at various temperatures, obtaining the phase errors of the components in each phase measurement channel at different temperatures. This is then used to generate a phase correction table for direction finding phase calibration. The outer loop calibration table is calibrated at a temperature set to T (e.g., T1). The inner loop calibration table contains the phase errors of the phase measurement channels at multiple temperatures (e.g., T1, T2, T3, and Tn). The subtraction operation is performed at T1, and the component phase errors at other temperatures are then calculated to produce the final phase correction table.

[0057] In some embodiments of this specification, a miniaturized multi-channel direction-finding receiving device is provided for frequency conversion processing of the received antenna lateral RF signal to obtain an output signal. (1) The signal receiving module, calibration source module, control unit, monitoring module, direction-finding RF module, etc. are integrated and optimized in a small chassis, which simplifies the overall structure, effectively avoids the traditional complex wiring logic control and software and hardware coordination processing, and reduces the complexity of system design and implementation; (2) It adopts an integrated self-test function and a single-board operation mode, without the need for multiple modules to work together. When the system fails, maintenance work can be performed directly by plugging and unplugging related components, which greatly improves maintenance efficiency and reduces maintenance costs and difficulty. (3) Only one temperature sensor data needs to be collected to automatically update the internal and external circulation calibration table of the entire system, which can better adapt to temperature changes, improve the stability of the system in different temperature environments, and ensure the accuracy of phase calibration. (4) Through miniaturization design, the ADC transceiver chip is directly connected, which saves costs while ensuring accuracy, improves system reliability, and enhances the competitiveness of the system in practical applications.

Claims

1. A miniaturized multi-channel direction finding receiving device, characterized in that: include: A signal receiving module, a signal processing module, a storage module, a calibration module and a calibration antenna; wherein the signal receiving module is connected to the signal processing module, the signal processing module is connected to the calibration module and the storage module, and the calibration module is connected to the calibration antenna; A signal receiving module is used to receive radio frequency signals and intermediate frequency signals, and send the received radio frequency signals and intermediate frequency signals to a signal processing module; the signal receiving module includes: radio frequency input connector 1, intermediate frequency input connector 2, switch 1, switch 2, switch 3, switch 4, switch 5, switch 6, switch 7, switch 8, attenuator 1, attenuator 2, amplifier 1, filter 1 to filter 10, a frequency conversion channel and an analog-to-digital conversion unit; wherein the 4th pin of switch 1 is connected to the 1st pin of radio frequency input connector 1, the 1st pin of switch 1 is connected to the 1st pin of switch 2, the 2nd pin of switch 1 is connected to one end of attenuator 1, and the 1st pin of attenuator 1 is connected to the 1st pin of attenuator 1. The other end is connected to pin 2 of switch 2, pin 3 of switch 1 is connected to the input of amplifier 1, the output of amplifier 1 is connected to pin 3 of switch 2, pin 4 of switch 2 is connected to IF input connector 2, pin 5 of switch 2 is connected to one end of attenuator 2, the other end of attenuator 2 is connected to pin 5 of switch 4, pin 1 of switch 4 is connected to pin 5 of switch 3, pin 2 of switch 4 is connected to one end of filter 5, the other end of filter 5 is connected to pin 2 of switch 6, pin 3 of switch 4 is connected to one end of filter 6, the other end of filter 6 is connected to pin 3 of switch 6. The 4th pin of switch 4 is connected to the 5th pin of switch 7, the 1st pin of switch 3 is connected to one end of filter 1, the other end of filter 1 is connected to the 1st pin of switch 5, the 2nd pin of switch 3 is connected to one end of filter 2, the other end of filter 2 is connected to the 2nd pin of switch 5, the 3rd pin of switch 3 is connected to one end of filter 3, the other end of filter 3 is connected to the 3rd pin of switch 5, the 4th pin of switch 3 is connected to one end of filter 4, the other end of filter 4 is connected to the 4th pin of switch 5, the 5th pin of switch 5 is connected to the 1st pin of switch 6, the 1st pin of switch 7 is connected to the One end of the filter seven is connected, the other end of the filter seven is connected to the first pin of the switch eight, the second pin of the switch seven is connected to one end of the filter eight, the other end of the filter eight is connected to the second pin of the switch eight, the third pin of the switch seven is connected to one end of the filter nine, the other end of the filter nine is connected to the third pin of the switch eight, the fourth pin of the switch seven is connected to one end of the filter ten, the other end of the filter ten and the fifth pin of the switch six are both connected to one end of the frequency conversion channel, the fourth pin of the switch eight is connected to the fourth pin of the switch six, the other end of the frequency conversion channel is connected to the analog-to-digital conversion unit, and the analog-to-digital conversion unit is connected to the signal processing module; The frequency conversion channel includes: amplifier 2, amplifier 3, amplifier 4, filter 11, filter 12, local oscillator 1, local oscillator 2, switch 9, mixer 1, mixer 2, mixer 3 and attenuator 3; wherein, the 5th pin of switch 6 is connected to the input end of amplifier 2, the other end of filter 10 is connected to the input end of amplifier 3, the output end of amplifier 2 is connected to the 1st pin of mixer 1, the 3rd pin of mixer 1 is connected to one end of local oscillator 1, the 2nd pin of mixer 1 is connected to one end of filter 11, and the other end of filter 11 is connected to switch 9. the first pin of the output terminal of the amplifier three is connected to the first pin of the mixer two, the second pin of the mixer two is connected to one end of the filter twelve, the third pin of the mixer two is connected to the other end of the local oscillator one, the other end of the filter twelve is connected to the second pin of the switch nine, the third pin of the switch nine is connected to the first pin of the mixer three, the third pin of the mixer three is connected to the local oscillator two, the second pin of the mixer three is connected to the input end of the amplifier four, the output end of the amplifier four is connected to one end of the attenuator three, and the other end of the attenuator three is connected to the analog-to-digital conversion unit; The analog-to-digital conversion unit includes: a switch 10, a switch 11, a switch 12, a filter 13, a filter 14, and an amplifier 5; wherein the third pin of the switch 10 is connected to the other end of the attenuator 3, the first pin of the switch 10 is connected to one end of the filter 13, the other end of the filter 13 is connected to the first pin of the switch 11, the second pin of the switch 10 is connected to one end of the filter 14, the other end of the filter 14 is connected to the second pin of the switch 11, the third pin of the switch 11 is connected to the third pin of the switch 12, the second pin of the switch 12 is connected to the input end of the amplifier 5, and the first pin of the switch 12 and the output end of the amplifier 5 are both connected to the signal processing module; A signal processing module, configured to generate a calibration source signal and a phase calibration table based on the radio frequency signal and the intermediate frequency signal; and control the switching of the switch; the signal processing module comprising an intermediate frequency processor, an ADC transceiver chip, a clock chip, and a voltage conversion chip; wherein one end of the ADC transceiver chip is respectively connected to the first pin of switch 12, the output end of amplifier 5, and the calibration module; one end of the voltage conversion chip is respectively connected to the inner loop calibration unit and the outer loop calibration unit; and the intermediate frequency processor is respectively connected to the other end of the ADC transceiver chip, the clock chip, the other end of the voltage conversion chip, and the storage module; A storage module, used for storing phase correction table data; A calibration module, configured to generate a calibration signal based on the calibration source signal and the phase calibration table; the calibration module comprising: a calibration source and a power splitter; wherein the input end of the calibration source is connected to the other end of the signal processing module, and the output end of the calibration source is connected to the calibration antenna and the power splitter, respectively; The calibration antenna is used to receive the calibration signal sent by the calibration module and perform external loop calibration operations.

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