Guide pulse receiving device and circuit thereof

Abstract

The utility model discloses a guide pulse receiving device and a circuit thereof, the circuit comprises a guide pulse circuit and a receiving circuit, the guide pulse circuit is internally provided with a crystal oscillator, signals are greatly attenuated by adopting a mode of series connection of four stages of programmable attenuators, and filtering is carried out by adopting a mode of series connection of two stages of filters; the receiving circuit adopts a mode that two stages of switches are connected in series, so that the isolation degree between channels is increased. The device comprises a base, and the base is of a vertically symmetrical structure; grooves are formed in the two faces of the base, a partition is arranged in each groove and divides the groove into two independent groove chambers, screw holes are formed in the base and the partition, and the partition is connected with the partition through bolts; the partition plate is used for forming a cavity with the base. The interior of the guided pulse receiving device is divided into a positive layer structure and a negative layer structure, the space utilization rate is increased, each layer structure is divided into two independent cavities, channels can be spatially isolated, the isolation degree is improved, and the self-excitation risk is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of electronic communications, in particular to a guide pulse receiving device and a circuit thereof. Background Art

[0002] The pilot pulse receiving module is primarily used in radar ranging systems. Its operating process involves transmitting a signal, which returns to the receiving module upon encountering a target. The time difference between transmission and reception and the signal propagation speed are used to calculate the distance between the system and the target. The pilot pulse receiving circuit features pilot pulse generation, programmable attenuation of the pilot pulse signal with high dynamic range, high-power reception, and channel selection. It is characterized by its small size, high integration, and compact structure.

[0003] Guided pulse ranging is a commonly used precision ranging method. Its basic principle is that a pulse signal is transmitted by a specific device. This signal is reflected by a target object during propagation, and the reflected pulse signal is then received by a receiving device. Since the propagation speed of the pulse signal is known (usually the speed of light), by measuring the time difference between the transmitted pulse and the received reflected pulse, the distance traveled by the pulse signal can be calculated using the simple physics formula—distance equals speed multiplied by time—and the precise distance between the source and the target object can be determined.

[0004] In practical applications, guided pulse ranging systems require extremely high timing accuracy, as even small timing errors can lead to significant deviations in distance measurements. To this end, modern ranging systems are typically equipped with high-precision clocks and signal processing technologies to ensure accurate timing. Furthermore, to enhance ranging reliability, multiple measurements may be averaged to minimize the impact of random errors on the measurement results.

[0005] However, existing receiving pulse guide modules have disadvantages such as poor isolation, low input and output P-1, and heavy weight. Summary of the Invention

[0006] The purpose of the present invention is to provide a receiving guide pulse device and circuit thereof to address the above-mentioned problems, in order to improve the problems of poor isolation and low input and output P-1 in the existing receiving guide pulse module.

[0007] The technical solution adopted by the present invention is as follows: a receiving guide pulse circuit, the circuit includes a guide pulse circuit and a receiving circuit; the guide pulse circuit includes a crystal oscillator, an attenuator, an amplifier and a filter; the guide pulse circuit has a built-in crystal oscillator, and the crystal oscillator is used to generate an intermediate frequency signal; the output end of the crystal oscillator is connected to a first switch, and the first switch controls the opening or closing of the circuit; the first switch is connected to a first attenuator, a first amplifier and a first filter in sequence, and the first attenuator, the first amplifier and the first filter are used to process the intermediate frequency signal; the output end of the second attenuator is connected to a mixer, and the second attenuator is used to receive a guide pulse signal input, and the mixer is used to mix the guide pulse signal; the output end of the mixer is connected to a third attenuator and a second filter, and the second filter filters out the frequency conversion band the stray signals; the second filter is connected in series with a four-stage programmable attenuator and a second amplifier, and the four-stage programmable attenuator attenuates the signal; the output end of the four-stage programmable attenuator is connected with a second switch, and the output of the signal is controlled by the second switch; the guide pulse circuit is used to generate a guide pulse signal, and frequency-convert the coupled signal of the transmission signal, and then filter and amplify the frequency-converted signal; the receiving circuit includes a three-stage switch in series, the three-stage switch is connected to the first-stage low-noise amplifier of the receiving end, the first-stage low-noise amplifier of the receiving end is connected to the first coupler, and the signal is coupled and detected by the first coupler, the output end of the first coupler is connected to the first filter, the first filter is connected to the first power divider, and the first power divider divides the signal into power and outputs it; the receiving circuit is used to amplify the received signal and detect its power.

[0008] Furthermore, one end of the first switch is connected to the output end of the crystal oscillator, and the other end of the first switch is connected to the first programmable attenuator. The first switch is used to control the circuit to switch between the receiving mode and the guide pulse mode; when the switching circuit mode is the receiving mode, the first switch is closed, the intermediate frequency signal is cut off by the first switch, and the guide pulse signal stops being generated; when the switching circuit mode is the guide pulse mode, the first switch is opened, and the first switch is connected to the first attenuator, the first amplifier, the first filter and the mixer. The intermediate frequency signal passes through the first switch and then passes through a 2dB first attenuator to enter the first amplifier; after being filtered by the first filter, it enters the mixer for mixing; the output end of the mixer is connected to the third attenuator, and the amplitude of the signal is reduced by the third attenuator; the output end of the third attenuator is connected to the input end of the second filter, and the output end of the second filter is connected to the temperature-compensated attenuator. The output end of the temperature-compensated attenuator is connected in series with the four-stage attenuator and the second amplifier, and the four-stage attenuator is used to attenuate the signal to different degrees.

[0009] Furthermore, the four-stage programmable attenuator includes three programmable attenuators and one programmable step attenuator; the output end of the temperature-compensated attenuator is connected to the input end of the first-stage programmable attenuator, the output end of the first-stage programmable attenuator is connected to the 5dB attenuation, and the signal attenuated by the first-stage programmable attenuator is further attenuated by the 5dB attenuation; the output end of the 5dB attenuation is connected to the input end of the second amplifier, the output end of the second amplifier is connected to the input end of the second-stage programmable attenuator, the output end of the second-stage programmable attenuator is connected to the input end of the third-stage programmable attenuator, and the output end of the third-stage programmable attenuator is connected to the input end of the fourth-stage programmable step attenuator.

[0010] Furthermore, the output end of the fourth-stage programmable step attenuator is connected to a 1dB attenuator, and the output end of the 1dB attenuator is connected to the second switch, and the output of the signal is controlled by the second switch; the second switch is respectively connected to the first-stage low-noise amplifier, the first coupler and the third filter at the receiving end, the first-stage low-noise amplifier at the receiving end amplifies the signal, and the first coupler performs coupling detection on the amplified signal, and the third filter is used to improve the out-of-band suppression of the signal; the output end of the third filter is connected to the first power divider, and the first power divider divides the signal power into two outputs.

[0011] Furthermore, the intermediate frequency signal frequency generated by the crystal oscillator of the guide pulse circuit is 63MHz and the amplitude is -2dBm; the guide pulse input signal frequency is 1025MHz~1150MHz, the typical amplitude value is +5dBm, and the guide pulse input signal is mixed with the intermediate frequency signal to output a 962MHz~1213MHz signal; the input signal of the first amplifier is -5dBm, the gain is 20dB, and the output signal is +15dBm; the input amplitude of the second amplifier is -21.7dBm, and the signal output amplitude after the second amplifier is +7.3dBm; the input amplitude of the first-stage low-noise amplifier at the receiving end is +0.1dBm, and the signal output amplitude after the first-stage low-noise amplifier at the receiving end is 16.8dBm.

[0012] Furthermore, the step size of the programmable attenuator is 31.5 dB, and the step size of the programmable step attenuator is 0.5 dB.

[0013] Furthermore, the three-stage switch of the receiving circuit includes: switch No. 1, switch No. 2 and switch No. 3; switch No. 1 is connected to switch No. 2, and switch No. 1 and switch No. 2 are used to increase the isolation of the channel; switch No. 3 is connected to switch No. 2, and switch No. 3 is used to switch the circuit mode between the pulse guide mode and the receiving mode.

[0014] Furthermore, a device for receiving guided pulses includes a base, which is a symmetrical structure in the upper and lower parts; grooves are provided on both sides of the base, a partition is provided in the groove, and the partition is used to divide the groove into two independent chambers, screw holes are provided on the base and the partition, and the partition is connected to the partition by bolts; the partition is used to form a cavity with the base.

[0015] Furthermore, the device is an integrated structure, and a first cover plate and a second cover plate are respectively provided on both sides of the base, and the first cover plate and the second cover plate form a whole with the base.

[0016] Furthermore, the partition is provided with a first opening, and the first cover plate and the second cover plate are provided with a second opening corresponding to the first opening, and the bolts are connected to the screw holes through the first opening and the second opening.

[0017] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0018] The utility model has a built-in crystal oscillator in the pulse guide circuit, and the crystal oscillator is placed in an independent cavity, which can achieve good spatial isolation of the crystal oscillator; the intermediate frequency signal with good isolation generated by the crystal oscillator is beneficial to improving the isolation of the receiving pulse guide module.

[0019] The utility model adopts a two-stage filter series connection method to filter the intermediate frequency signal. After the intermediate frequency signal passes through the first stage low noise amplifier at the receiving end, the purity of the signal can be improved when it enters the mixer.

[0020] The utility model also adopts a four-stage programmable attenuator connected in series in the pulse guide circuit to perform large-scale programmable attenuation of the signal, thereby improving the gain control in the pulse guide circuit.

[0021] The receiving circuit of the present invention adopts a two-stage switch series connection mode, which can effectively increase the shutoff effect of the signal in the circuit, thereby improving the isolation of the circuit.

[0022] The receiving pulse guide device of the present invention is internally divided into two layers of structure, namely, positive and negative layers, which increases the utilization rate of space, and each layer of structure is divided into two separate cavities. In a longer radio frequency link, the channels can be spatially isolated, thereby improving isolation and reducing the risk of self-excitation. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is the overall circuit design structure diagram of the utility model;

[0024] Figure 2 This is a principle block diagram of the pulse guide circuit of the present utility model;

[0025] Figure 3This is a functional block diagram of the receiving circuit of the present utility model;

[0026] Figure 4 This is a schematic diagram of the overall structure of the device of the present utility model;

[0027] Figure 5 This is a schematic diagram of the internal structure of the device of the present utility model.

[0028] Label description: 1. Base; 2. Groove; 3. Partition; 4. Partition; 5. First opening; 6. Second opening; 11. First cover; 12. Second cover. DETAILED DESCRIPTION

[0029] The present invention will be described in detail below with reference to the accompanying drawings.

[0030] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0031] Example 1

[0032] like Figure 1 As shown, one embodiment of the present invention is a receiving pilot pulse circuit, comprising a pilot pulse circuit and a receiving circuit. The pilot pulse circuit generates a pilot pulse signal, frequency-converts a coupled signal of a transmitted signal, amplifies and filters the frequency-converted signal, and adjusts the amplification gain; the receiving circuit amplifies and processes the received signal and performs power detection.

[0033] The pilot pulse circuit has a built-in crystal oscillator, which generates an intermediate frequency signal with a frequency of 63MHz and an amplitude of -2dBm; the output end of the crystal oscillator is connected to a first switch, and the first switch controls the opening or closing of the circuit; the first switch is sequentially connected to a first attenuator, a first amplifier, and a first filter, and the intermediate frequency signal is processed by the first attenuator, the first amplifier, and the first filter, wherein the first attenuator is a fixed attenuator of 2dB, the input signal of the first amplifier is -5dBm, the gain of the first amplifier is 20dB, and the output signal is +15dBm; the frequency of the pilot pulse input signal is 1025MHz to 1150MHz, and the typical amplitude is +5dBm. The pilot pulse signal is input to a second attenuator, and the output end of the second attenuator is connected to a mixer. The mixer mixes the pilot pulse signal; the intermediate frequency signal input to the mixer is 63MHz, and the processed intermediate frequency signal is also input to the mixer. The mixer outputs a 962MHz to 1213MHz signal, the mixer frequency conversion insertion loss is 10dB, and the mixer output signal is -5dBm. The output end of the mixer is connected to a third attenuator and a second filter, and the second filter filters out the spurious signals caused by the frequency conversion; the second filter is connected in series with a four-stage programmable attenuator and a second amplifier, and the four-stage programmable attenuator attenuates the signal; the output end of the four-stage programmable attenuator is connected to a second switch, and the output of the signal is controlled by the second switch; the pilot pulse circuit is used to generate a pilot pulse signal, perform frequency conversion on the coupled signal of the transmission signal, and then filter and amplify the frequency conversion signal;

[0034] The receiving circuit includes three switches connected in series, the switches are connected to the first-stage low-noise amplifier at the receiving end, the first-stage low-noise amplifier at the receiving end is connected to a coupler No. 1, and the coupler No. 1 performs coupling detection on the signal, the output end of the coupler No. 1 is connected to a filter No. 1, and the filter No. 1 is connected to a power divider No. 1, and the power divider No. 1 divides the signal into power and outputs it; the receiving circuit is used to amplify the received signal and detect its power.

[0035] The pulse guide circuit of this embodiment has a built-in crystal oscillator, and the crystal oscillator is placed in an independent cavity, which can provide good spatial isolation for the crystal oscillator; the intermediate frequency signal with good isolation generated by the crystal oscillator is beneficial to improving the isolation of the receiving pulse guide module; the pulse guide circuit also uses a four-stage programmable attenuator in series to perform large-scale programmable attenuation of the signal, thereby improving the gain control in the pulse guide circuit; the receiving circuit uses a two-stage switch in series, which can effectively increase the signal shutdown effect in the circuit, thereby improving the isolation in the circuit.

[0036] Example 2

[0037] like Figure 2As shown, another embodiment of the present invention is to set a first switch in the circuit in order to switch the circuit between the receiving mode and the pulse guiding mode.

[0038] One end of the first switch is connected to the output end of the crystal oscillator, and the other end of the first switch is connected to the first programmable attenuator, and the first switch is used to control the circuit to switch between the receiving mode and the pulse guiding mode;

[0039] When the switching circuit mode is the receiving mode, the intermediate frequency signal is cut off by the first switch, and the guide pulse signal stops being generated;

[0040] When the switching circuit mode is the pilot pulse mode, the intermediate frequency signal passes through the first switch and then enters the first amplifier through a 2dB first attenuator; after being filtered by the first filter, it enters the mixer for mixing; the output end of the mixer is connected to the third attenuator, and the amplitude of the signal is reduced by the third attenuator; the output end of the third attenuator is connected to the input end of the second filter, and the output end of the second filter is connected to the temperature-compensated attenuator; the output end of the temperature-compensated attenuator is connected in series with the four-stage programmable attenuator and the second amplifier, and the four-stage programmable attenuator is used to attenuate the signal to different degrees.

[0041] The circuit mode is switched by the first switch, which can cut off and release the signal; when the circuit is switched to the pulse guide mode, the signal is greatly attenuated by the four-stage programmable attenuator.

[0042] Example 3

[0043] like Figure 2 As shown, another embodiment of the present invention is that in order to achieve large-scale programmable attenuation of the signal, a four-stage programmable attenuator is connected in series in the circuit.

[0044] The four-stage programmable attenuator includes three programmable programmable attenuators and one programmable step programmable attenuator;

[0045] The output end of the temperature-compensated attenuator is connected to the input end of the first-stage programmable attenuator, and the output end of the first-stage programmable attenuator is connected to a 5dB attenuator, so that the 5dB attenuator further attenuates the signal attenuated by the first-stage programmable attenuator;

[0046] The output end of the 5dB attenuator is connected to the input end of the second amplifier, the output end of the second amplifier is connected to the input end of the second-stage programmable attenuator, the output end of the second-stage programmable attenuator is connected to the input end of the third-stage programmable attenuator, and the output end of the third-stage programmable attenuator is connected to the input end of the fourth-stage programmable step attenuator.

[0047] Because existing technology lacks large-scale programmable attenuation, this utility model uses a four-stage programmable attenuator connected in series to achieve large-scale programmable attenuation of the signal. The first stage is a 6-position programmable attenuator with 0.5dB steps, and the other three stages are 32dB fixed attenuators. The multi-stage series connection can achieve a large-scale programmable attenuation function with 0.5dB steps of 128dB.

[0048] Example 4

[0049] like Figure 2 As shown, another embodiment of the present invention is that in the pulse guide circuit, the signal is attenuated by a four-stage programmable attenuator, processed by a second switch, a first-stage low-noise amplifier at the receiving end, a first coupler and a third filter, and then the signal power is divided into two outputs by a first power divider.

[0050] The output end of the fourth-stage programmable step attenuator is connected to the 1dB attenuator, and the output end of the 1dB attenuator is connected to the second switch, and the output of the signal is controlled by the second switch;

[0051] The second switch is respectively connected to the first-stage low-noise amplifier, the first coupler and the third filter at the receiving end. The first-stage low-noise amplifier at the receiving end amplifies the signal, and the first coupler performs coupling detection on the amplified signal. The third filter is used to improve the out-of-band suppression of the signal. The output end of the third filter is connected to the first power divider, and the first power divider divides the signal power into two output paths.

[0052] In the pulse guide circuit of this embodiment, after the intermediate frequency signal passes through the first-stage low-noise amplifier at the receiving end, the purity of the signal can be improved when entering the mixer.

[0053] Example 5

[0054] like Figure 2 As shown, another embodiment of the present invention is, in order to more clearly show the specific situation of the circuit in this embodiment, the intermediate frequency signal frequency generated by the crystal oscillator of the pilot pulse circuit is 63MHz, the amplitude is -2dBm, the pilot pulse input signal frequency is 1025MHz~1150MHz, the amplitude is typically +5dBm, and the pilot pulse input signal is mixed with the intermediate frequency signal to output a 962MHz~1213MHz signal;

[0055] The first amplifier receives the output signal from the mixer, the amplitude of which is attenuated to -5dBm after mixing; the gain of the first amplifier is set to 20dB to compensate for the loss of the signal during transmission and mixing; after amplification, the amplitude of the signal is increased to +15dBm, meeting the requirements of subsequent processing;

[0056] The second amplifier receives the output of the first amplifier, but considering the system loss and the output fluctuation of the previous stage, the input amplitude is set to -21.7dBm; the gain of the second amplifier is large enough to increase the signal amplitude from -21.7dBm to +7.3dBm, ensuring that the signal strength meets the subsequent processing or transmission requirements.

[0057] The first-stage low-noise amplifier at the receiving end receives a signal with an amplitude of +0.1dBm from the second amplifier. This amplifier is designed to improve signal quality while minimizing noise introduction. Its gain is set sufficiently high to increase the signal amplitude from +0.1dBm to 16.8dBm. The output signal from the first-stage low-noise amplifier at the receiving end not only has an enhanced amplitude but also an optimized signal-to-noise ratio, making it suitable for more advanced signal processing or transmission.

[0058] This embodiment processes a pilot pulse input signal of a specific frequency and amplitude mixed with an intermediate frequency signal, and finally outputs a signal that meets the requirements through multi-stage amplification processing, thereby effectively processing high-frequency signals and improving signal amplitude and quality.

[0059] Example 6

[0060] like Figure 2 As shown, another embodiment of the present invention is that in order to achieve large-scale programmable attenuation, a four-stage programmable attenuator is set in the pulse guide circuit, including three programmable attenuators and one programmable step attenuator, the step size of the programmable attenuator is 31.5dB, and the step size of the programmable step attenuator is 0.5dB.

[0061] By using three programmable attenuators with 31.5dB steps, the system can achieve an attenuation of up to 94.5dB (31.5dB * 3), enabling the circuit described in this embodiment to significantly attenuate signals. Adding a programmable step attenuator with a 0.5dB step size after the three large-step attenuators allows the system to achieve further fine-grained attenuation adjustment, improving the circuit's applicability. Precisely controlling signal attenuation can optimize overall system performance. In communications systems, appropriate attenuation can reduce mutual interference between signals and improve the reliability and stability of signal transmission. In the field of test and measurement, precise attenuation control can improve the accuracy and reliability of test results.

[0062] Example 7

[0063] like Figure 3 As shown, another embodiment of the present invention is that the circuit includes a pulse guide circuit and a receiving circuit, and the receiving circuit is used to amplify the received signal and detect its power;

[0064] The three-stage switch of the receiving circuit includes: switch No. 1, switch No. 2 and switch No. 3;

[0065] Switches 1 and 2 increase isolation between channels and reduce signal crosstalk and interference. By precisely controlling the on and off states of these two switches, only the desired signal can pass through at a given time, improving signal purity and system stability.

[0066] Switch 3, connected to switch 2, is a key component of the entire switching mechanism. It switches the circuit's operating mode between pilot pulse mode and receiver mode. When switch 3 is closed, the circuit operates in pilot pulse mode, during which the receiver circuit may be in standby or off to avoid interference with the pilot pulse signal. When switch 3 is open, the circuit switches to receiver mode, where the receiver circuit begins amplifying and detecting the power of the received signal.

[0067] The system operates as follows: When the system starts up, all switches are in their preset initial states. Based on system requirements or external control signals, switch 3 switches state. To transmit a pulse, switch 3 closes, shutting down the receiving circuit or putting it into low-power mode. To receive a signal, switch 3 opens, activating the receiving circuit and beginning signal amplification and power detection.

[0068] In receiving mode, switches 1 and 2 adjust their states according to signal flow direction and isolation requirements to ensure efficient signal transmission and accurate processing.

[0069] The coordinated operation of switches 1 and 2 effectively improves isolation between channels and reduces signal interference. The fast switching capability of switch 3 enables the circuit to seamlessly switch between pulse guide mode and receiving mode, improving the system's flexibility and response speed. The receiving circuit accurately amplifies and detects the power of the signal, providing high-quality input signals for subsequent signal processing.

[0070] In summary, the multi-mode switching receiving circuit system in this embodiment achieves flexible switching of circuit operating modes and efficient signal processing through a three-level switching mechanism, providing reliable technical support for various application scenarios.

[0071] Example 8

[0072] like Figure 4-Figure 5 As shown, another embodiment of the present invention is a device for receiving guided pulses, the device comprising a base 1, the base 1 being a vertically symmetrical structure;

[0073] Grooves 2 are provided on both sides of the base 1, and a partition 4 is provided in the groove 2. The partition 4 divides the groove 2 into two independent groove chambers. Screw holes are provided on the base 1 and the partition 4, and the partition 3 is connected to the partition 4 by bolts; the partition 3 is used to form a cavity with the base 1.

[0074] There are two partitions 3, and four cavities are respectively provided in the two partitions 3. The four cavities are isolated from each other. In a longer radio frequency link, the channels can be spatially isolated, the isolation is improved, and the risk of self-excitation is reduced.

[0075] Example 9

[0076] like Figure 5 As shown, another embodiment of the present invention is that the device is an integrated structure, and a first cover plate 11 and a second cover plate 12 are respectively provided on both sides of the base 1, and the first cover plate 11 and the second cover plate 12 form a whole with the base 1.

[0077] The base 1 is made of high-strength aluminum alloy and is integrally formed through a machining process to ensure a stable structure and good thermal conductivity. The first cover 11 fits tightly to one side of the base 1 and is fixed to the base 1 by screws, snaps, or welding, forming the first closed interface of the device. The first cover 11 is also made of aluminum alloy, and the surface can be anodized as needed to enhance corrosion resistance and beautify the appearance. The second cover 12 corresponds to the first cover 11. The second cover 12 covers the other side of the base 1 and together with the base 1 and the first cover 11, forms a closed aluminum cavity structure. The material, processing technology, and fixing method of the second cover 12 are the same as those of the first cover 11 to ensure the symmetry and consistency of the overall structure.

[0078] The integrated device in this embodiment measures 90mm (length) x 64mm (width) x 18mm (height). This design takes portability and installation flexibility into account, making it suitable for a variety of space-constrained applications. The cavity structure, constructed of aluminum alloy, not only reduces the device's overall weight but also provides excellent heat dissipation and electromagnetic shielding. The high thermal conductivity of aluminum alloy allows heat generated within the device to be quickly transferred to the housing and dissipated into the air, ensuring stable operation.

[0079] The integrated device has a compact structure, a high-strength housing and excellent heat dissipation performance, and is particularly suitable for occasions with strict space requirements, complex working environments and high requirements for equipment stability.

[0080] In summary, the aluminum cavity integrated device provided in this embodiment achieves a combination of high integration, high strength and high heat dissipation performance.

[0081] Example 10

[0082] like Figure 2 As shown, another embodiment of the present invention is that the partition plate 3 has a first opening 5, and the first cover plate 11 and the second cover plate 12 are provided with a second opening 6 corresponding to the first opening 5, and the bolts are connected to the screw holes through the first opening 5 and the second opening 6.

[0083] The partition 3 is connected to the base 1 and the first cover plate 11 and the second cover plate 12 by bolts. The connection method of bolts and screw holes enhances the flexibility of the device and enables timely replacement of components when some components are damaged.

[0084] Thus, the openings provided on the first cover plate 11 and the second cover plate 12 enable them to be connected with bolts, thereby allowing flexible replacement of components.

[0085] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A receiving guide pulse circuit, characterized in that: The circuit includes a pulse guide circuit and a receiving circuit; The pulse guide circuit includes a crystal oscillator, a programmable attenuator, an amplifier and a filter; The pulse guide circuit has a built-in crystal oscillator, which is used to generate an intermediate frequency signal; the output end of the crystal oscillator is connected to a first switch, which controls the opening or closing of the circuit; the first switch is sequentially connected to a first attenuator, a first amplifier, and a first filter, which are used to process the intermediate frequency signal; The output end of the second attenuator is connected to a mixer, the second attenuator is used to receive a pilot pulse signal input, and the mixer is used to mix the pilot pulse signal; the output end of the mixer is connected to a third attenuator and a second filter; the second filter is connected in series with a four-stage programmable attenuator and a second amplifier; the output end of the four-stage programmable attenuator is connected to a second switch; The receiving circuit includes three switches connected in series, the three switches are connected to the first-stage low-noise amplifier at the receiving end, the first-stage low-noise amplifier at the receiving end is connected to coupler No. 1, the output end of coupler No. 1 is connected to filter No. 1, and filter No. 1 is connected to power divider No.

1.

2. A receiving guide pulse circuit according to claim 1, characterized in that: One end of the first switch is connected to the output end of the crystal oscillator, and the other end of the first switch is connected to the first programmable attenuator, and the first switch is used to control the circuit to switch between the receiving mode and the pulse guiding mode; The first switch is connected to the first programmable attenuator, the first amplifier, the first filter and the mixer. The output end of the mixer is connected to the third programmable attenuator, which reduces the amplitude of the signal. The output end of the third attenuator programmable attenuator is connected to the input end of the second filter, and the output end of the second filter is connected to the temperature-compensated attenuator. The output end of the temperature-compensated attenuator is connected in series with the four-stage programmable attenuator and the second amplifier. The four-stage programmable attenuator is used to attenuate the signal to different degrees.

3. A receiving pulse guide circuit according to claim 2, characterized in that: The four-stage programmable attenuator includes three programmable attenuators and one programmable step attenuator; The output end of the temperature-compensated attenuator is connected to the input end of the first-stage programmable attenuator, and the output end of the first-stage programmable attenuator is connected to a 5dB attenuator, which is used to further attenuate the signal attenuated by the first-stage programmable attenuator. The output end of the 5dB attenuation is connected to the input end of the second amplifier, the output end of the second amplifier is connected to the input end of the second-stage programmable attenuator, the output end of the second-stage programmable attenuator is connected to the input end of the third-stage programmable attenuator, and the output end of the third-stage programmable attenuator is connected to the input end of the fourth-stage programmable step attenuator.

4. A receiving pulse guide circuit according to claim 3, characterized in that: The output end of the fourth-stage programmable step attenuator is connected to a 1dB attenuator, and the output end of the 1dB attenuator is connected to the second switch; The second switch is respectively connected to the first low-noise amplifier, the first coupler and the third filter, the first low-noise amplifier is used to amplify the signal, the first coupler is used to perform coupling detection on the amplified signal, and the third filter is used to improve the out-of-band suppression of the signal; the output end of the third filter is connected to the first power divider, and the first power divider divides the signal power into two output paths.

5. A receiving pulse guide circuit according to claim 4, characterized in that: The intermediate frequency signal generated by the crystal oscillator in the guide pulse circuit has a frequency of 63MHz and an amplitude of -2dBm; The pilot pulse input signal frequency is 1025MHz to 1150MHz, the amplitude is typically +5dBm, and the pilot pulse input signal is used to mix with the intermediate frequency signal to output a 962MHz to 1213MHz signal; The input signal of the first amplifier is -5dBm, the gain is 20dB, and the output signal is +15dBm; The input amplitude of the second amplifier is -21.7dBm, and the output amplitude of the signal after the second amplifier is +7.3dBm; The input amplitude of the first-stage low-noise amplifier at the receiving end is +0.1dBm, and the output amplitude of the signal after passing through the first-stage low-noise amplifier at the receiving end is 16.8dBm.

6. The receiving guide pulse circuit according to claim 3, characterized in that: The step size of the programmable attenuator is 31.5dB, and the step size of the programmable step attenuator is 0.5dB.

7. The receiving guide pulse circuit according to claim 1, characterized in that: The three-stage switch of the receiving circuit includes: switch No. 1, switch No. 2 and switch No. 3; The first switch is connected to the second switch, and the first switch and the second switch are used to increase the isolation of the channel; The third switch is connected to the second switch, and the third switch is used to switch the circuit mode between the pulse guiding mode and the receiving mode.

8. A receiving guide pulse device, using a receiving guide pulse circuit according to any one of claims 1 to 7, characterized in that: The device comprises a base (1), and the base (1) is a vertically symmetrical structure; Grooves (2) are provided on both sides of the base (1), a partition (4) is provided in the groove (2), and the partition (4) is used to divide the groove (2) into two independent groove chambers. Screw holes are provided on the base (1) and the partition (4), and the partition (3) is connected to the partition (4) by bolts; the partition (3) is used to form a cavity with the base (1).

9. The device for receiving a guided pulse according to claim 8, wherein: The device is an integrated structure, wherein a first cover plate (11) and a second cover plate (12) are respectively provided on both sides of the base (1), and the first cover plate (11) and the second cover plate (12) form a whole with the base (1).

10. The device for receiving a guided pulse according to claim 9, characterized in that: The partition plate (3) has a first opening (5), and the first cover plate (11) and the second cover plate (12) are provided with second openings (6) corresponding to the first opening (5), and bolts are connected to the screw holes through the first opening (5) and the second opening (6).

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