Miniaturized broadband receiver

Abstract

The utility model discloses a miniaturized broadband receiver, which relates to the technical field of digital receivers and comprises a cavity, an RF signal input port is mounted at the front end of one side of the outer surface of the cavity, and an input impedance matcher is mounted at the bottom end of the shaft surface of the RF signal input port and penetrates through the outer surface of the cavity. A preselection filter is arranged at the rear end of the outer surface of the input impedance matcher, and a low-noise amplifier is installed at the rear end of the outer surface of the preselection filter. The high-efficiency and low-noise level is always kept in the signal transmission process from the receiving end to the output end, meanwhile, mutual interference among different circuits is effectively prevented by using the isolation amplifier, so that the independence and definition of the signals are improved, unnecessary high-frequency components are further filtered out by the level low-pass filter, and the signal transmission efficiency is improved. And the final output signal is cleaner.

Description

TECHNICAL FIELD

[0001] The utility model relates to digital receiver technical field, concretely relates to a miniaturized wideband receiver. BACKGROUND

[0002] The wideband receiver converts the received wideband signal into a digital signal through an analog-to-digital converter, and then uses digital signal processing technology to analyze and process it, completing frequency conversion, filtering, demodulation and other operations. This kind of receiver is a key component of various systems (such as communication, radar), and also represents the development trend of the receiver.

[0003] Although the current miniaturized wideband receiver has excellent performance in the field of radio reconnaissance, such as efficient signal processing, highly integrated design and dynamic gain adjustment, there are still some deficiencies. When facing strong interference signals, the current filter and isolation technology may not be able to effectively suppress all interference, thereby affecting the receiving accuracy. Secondly, the scalability of the existing system is relatively limited, and the support for emerging frequency bands or communication standards is also relatively lacking. SUMMARY

[0004] To solve the above technical problems, a miniaturized wideband receiver is provided, which solves the problems of weak anti-interference and limited scalability raised in the background technology.

[0005] To achieve the above purpose, the technical scheme adopted by the utility model is:

[0006] A miniaturized wideband receiver, comprising: a cavity, an RF signal input port is installed on one side of the outer surface of the cavity, an input impedance matcher is installed on the bottom end of the shaft surface of the RF signal input port and penetrates the outer surface of the cavity, a pre-selection filter is arranged on the rear end of the outer surface of the input impedance matcher, a low-noise amplifier is installed on the rear end of the outer surface of the pre-selection filter, an isolation amplifier is installed on the rear end of the outer surface of the low-noise amplifier, and a first mixer is arranged on the right side of the outer surface of the isolation amplifier.

[0007] Preferably, a first local oscillator signal generator is installed on the top end of the outer surface of the first mixer, a first low-pass filter is installed on one side of the outer surface of the first mixer, and a second mixer is installed on the right side of the outer surface of the first low-pass filter.

[0008] Preferably, a second local oscillator signal generator is installed on the right side of the outer surface of the second mixer, a second low-pass filter is installed on one side of the outer surface of the second local oscillator signal generator, a third local oscillator signal generator is installed on one side of the outer surface of the second low-pass filter, and a third mixer is installed on one side of the outer surface of the third local oscillator signal generator.

[0009] Preferably, the outer surface top end of the third mixer is provided with a third low pass filter, the outer surface right side of the third low pass filter is provided with a switch filter, and the outer surface one side of the switch filter is provided with a gain control circuit.

[0010] Preferably, the outer surface bottom end of the gain control circuit is fixedly provided with an adjustable gain amplifier, the outer surface one side of the adjustable gain amplifier is provided with an output filter, and the outer surface rear end of the cavity is provided with an output port.

[0011] Preferably, the outer surface front end of the cavity is provided with a power supply port, the inner side of the power supply port is provided with a power supply module in the cavity, the outer surface left side of the power supply module is provided with a DC power supply unit, the outer surface right side of the power supply module is provided with a voltage stabilizer, the outer surface rear side of the power supply module is provided with a decoupling capacitor, and the outer surface front right side of the cavity is provided with a signal lamp.

[0012] Preferably, the outermost part of the cavity is provided as a protective layer, the inner side of the protective layer is provided with a shock-absorbing layer, the inner part of the shock-absorbing layer is provided with a shielding layer, and the inner side of the shielding layer is provided with a supporting layer.

[0013] Compared with the prior art, the utility model has the advantages that:

[0014] In the miniaturized wideband receiver, the input impedance matching device, the pre-selection filter, the low noise amplifier and the multiple cascade mixers ensure that the transmission process of the signal from the receiving end to the output end always maintains high efficiency and low noise level, meanwhile, the use of the isolation amplifier effectively prevents the mutual interference between different circuits, thereby improving the independence and clarity of the signal, the multiple low pass filters further filter out unnecessary high frequency components, so that the final output signal is cleaner, and in addition, through the gain control circuit and the adjustable gain amplifier, the receiver can dynamically adjust the signal amplitude according to the needs, thereby ensuring the stability and reliability of the output signal. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 It is a structural schematic view of the utility model;

[0016] Figure 2 It is a second elevation structural schematic view of the utility model;

[0017] Figure 3 It is a third elevation structural schematic view of the utility model;

[0018] Figure 4 It is a structural schematic view of the cavity assembly in the utility model.

[0019] Marked in the figure:

[0020] 1, cavity; 2, RF signal input port; 3, power supply port; 4, signal light; 5, output port; 6, DC power supply unit; 7, power module; 8, voltage stabilizer; 9, decoupling capacitor; 10, input impedance matcher; 11, pre-selection filter; 12, low noise amplifier; 13, isolation amplifier; 14, first local oscillator signal generator; 15, first mixer; 16, first low pass filter; 17, second mixer; 18, second local oscillator signal generator; 19, second low pass filter; 20, third local oscillator signal generator; 21, third mixer; 22, third low pass filter; 23, switch filter; 24, gain control circuit; 25, adjustable gain amplifier; 26, output filter; 27, protective layer; 28, shock absorbing layer; 29, shielding layer; 30, support layer. DETAILED DESCRIPTION

[0021] The following description is provided to disclose the present application so that those skilled in the art can implement the present application. The preferred embodiments in the following description are only examples, and other obvious modifications can be made by those skilled in the art.

[0022] Referring to Figures 1-2 As shown in the figure, a miniaturized wideband receiver includes: a cavity 1, which plays a role in protecting internal components and also provides physical support for the entire system, the outer surface of the cavity 1 is provided with an RF signal input port 2 at the front end of one side, the RF signal input port 2 is used to receive external radio frequency (RF) signals and guide the signals from the outside to the inside of the device, preparing for subsequent processing, the shaft surface of the bottom end of the RF signal input port 2 is provided with an input impedance matcher 10 penetrating through the outer surface of the cavity 1, the role of the input impedance matcher 10 is to adjust the impedance of the input signal to the best state to ensure that the signal transmission efficiency is maximized, thereby avoiding reflection loss, good impedance matching can minimize signal loss and improve the overall performance of the system, the outer surface of the input impedance matcher 10 is provided with a pre-selection filter 11 at the rear end, the main role of the pre-selection filter 11 is to limit the frequency spectrum of the signal passing through the device, allowing signals within a certain frequency range to pass through while suppressing signals of other frequencies, which helps to prevent noise and interference signals from adversely affecting subsequent processing stages, the outer surface of the pre-selection filter 11 is provided with a low noise amplifier 12 at the rear end, the purpose of the low noise amplifier 12 is to enhance the received signal while maintaining a low noise level. It can improve the amplitude of the signal, making subsequent processing (such as mixing) more effective and less susceptible to electronic noise, the outer surface of the low noise amplifier 12 is provided with an isolation amplifier 13 at the rear end, the role of the isolation amplifier 13 is to further avoid mutual interference between different circuits during signal amplification, ensuring the independence of each module, which can also provide additional signal gain to improve the quality of the final output signal.

[0023] Further, the outer surface of the isolation amplifier 13 is provided with a first mixer 15 on the right side, and a first local oscillator signal generator 14 is installed on the top of the outer surface of the first mixer 15. After the signal gain is completed, the first mixer 15 is used to mix the input signal with the local oscillator signal, so as to realize frequency conversion. The first local oscillator signal generator 14 provides the local oscillator signal required by the first mixer 15, so that it can perform the mixing operation, and filter out the high-frequency components generated after mixing, and only keep the required intermediate frequency (IF) signal. This helps to improve the signal quality and reduce the noise in the subsequent processing. The second mixer 17 further processes the intermediate frequency signal from the first mixer 15, mixes it with the second local oscillator signal, and performs frequency conversion again, so as to realize multi-stage down-conversion and improve the adjustability and flexibility of the system. The second local oscillator signal generator 18 provides the necessary local oscillator signal for the second mixer 17 to perform the second mixing operation. The second mixing can effectively expand the signal processing range. The second low-pass filter 19 is also responsible for filtering out the unwanted high-frequency components, ensuring that the output is a processed intermediate frequency signal, mainly used to improve the clarity and stability of the subsequent signal. The third local oscillator signal generator 20 provides the required local oscillator signal for the third mixer 21, so that it can perform the final mixing operation. The third mixer 21 collects the signals processed by the previous two stages, and is responsible for the last mixing to ensure that the output signal can reach the target frequency or meet the requirements of the next step of processing. The third low-pass filter 22 performs the final low-pass filtering on the mixed output signal. This step ensures that all unnecessary high-frequency components are removed, and a clean intermediate frequency signal is output for subsequent demodulation and processing. Through the above conversion of different frequency bands, the processing flow of the wideband signal is optimized. The first low-pass filter 16 is installed on one side of the outer surface of the first mixer 15. The second mixer 17 is installed on the right side of the outer surface of the first low-pass filter 16. The second local oscillator signal generator 18 is installed on the right side of the outer surface of the second mixer 17. The second low-pass filter 19 is installed on one side of the outer surface of the second local oscillator signal generator 18. The third local oscillator signal generator 20 is installed on one side of the outer surface of the second low-pass filter 19. The third mixer 21 is installed on one side of the outer surface of the third local oscillator signal generator 20. The third low-pass filter 22 is installed on the top of the outer surface of the third mixer 21. Through the series connection of various mixers and local oscillator signal generators, they cooperate with each other to improve the processing capability of the radio frequency signal. Through this structure, signal enhancement and filtering can be performed at each stage to ensure that the quality of the final output signal is higher.

[0024] Furthermore, a switching filter 23 is installed on the right side of the outer surface of the third low-pass filter 22. The function of the switching filter 23 is to select different frequency bands or signal paths as needed to facilitate the processing of different types of signals. This flexibility allows the receiver to adapt to various application scenarios and dynamically adjust to cope with different signal characteristics. A gain control circuit 24 is installed on one side of the outer surface of the switching filter 23. The gain control circuit 24 is used to adjust the signal gain so that the output signal can reach the required level. By dynamically adjusting the gain, the performance of the receiver can be optimized to cope with different input signal strengths, while avoiding overload or distortion. An adjustable gain amplifier 25 is fixedly installed at the bottom of the outer surface of the gain control circuit 24. The adjustable gain amplifier 25 enhances the filtered signal according to the instructions provided by the gain control circuit 24 to ensure that the signal has sufficient amplitude for subsequent processing and transmission. Its adjustable characteristics provide flexibility to maintain optimal performance in different environments. An output filter 26 is installed on one side of the outer surface of the adjustable gain amplifier 25. The task of the output filter 26 is to further clean the signal, remove interference or unnecessary frequency components that may be generated after adjusting the gain, and ensure that the final output signal is clean and stable. An output port 5 is installed at the rear end of the outer surface of the cavity 1.

[0025] Furthermore, a power port 3 is provided at the front end of the outer surface of the cavity 1, providing a power input interface so that the device can be connected to an external power source to provide the electrical energy required for the entire receiver to operate. Inside the cavity 1, on the inner side of the power port 3, a power module 7 is installed, which is responsible for converting the external power source into the different voltages and currents required by the device to ensure a stable and appropriate power supply for all internal components. On the left side of the outer surface of the power module 7, a DC power supply unit 6 is installed. This unit is responsible for converting AC power into DC power for internal use. It is a key component of the power module 7, ensuring stable operation of the device. On the right side of the outer surface of the power module 7, a voltage regulator 8 is installed. The voltage regulator 8 is used to maintain the stability of the output voltage and prevent voltage fluctuations from negatively affecting the performance of the device. This ensures the normal operation of each circuit in the receiver, thereby maintaining the reliability of signal processing. A decoupling capacitor 9 is installed on the rear side of the outer surface of the power module 7. The decoupling capacitor 9 helps to reduce power supply noise and interference, provides a smooth current supply, and ensures that each component receives sufficient and stable power during operation. An indicator light 4 is installed on the right side of the front end of the outer surface of the cavity 1. The indicator light 4 is used to indicate the working status of the device, such as power on, signal reception status, etc. Through the light signal, the operating status of the device can be quickly understood, providing convenient feedback to users and improving the user experience.

[0026] Further, the outermost part of the cavity 1 is provided with a protective layer 27, the main function of the protective layer 27 is to provide physical protection for the device, prevent the external environment (such as dust, moisture, impact, etc.) from causing damage to the internal components. It can be made of durable materials to ensure the reliable operation of the receiver under various working conditions, the inner side of the protective layer 27 is provided with a shock-absorbing layer 28, which is used to absorb and alleviate the impact of external impact or vibration on the device. This is particularly important for electronic devices, as continuous vibration can cause internal connections to loosen or components to be damaged, the presence of the shock-absorbing layer 28 can prolong the service life of the device, the inside of the shock-absorbing layer 28 is installed with a shielding layer 29, the shielding layer 29 is used to prevent electromagnetic interference (EMI) and radio frequency interference (RFI), to ensure that the receiver is not disturbed by external noise when receiving and processing signals. This design enhances the clarity and stability of the signal, which is a crucial link in the signal processing system, the inner side of the shielding layer 29 is installed with a support layer 30, which provides additional structural support to ensure the stability of other internal components in the entire cavity 1 structure. It helps to maintain the relative position between the various layers, avoiding shaking or displacement during use.

[0027] Working principle and implementation: firstly, the design of the miniaturized wideband receiver is applied to the field of radio reconnaissance, which can process 1 GHz~18 GHz radio frequency signals, and its operation process starts from the RF signal entering the device through the RF signal input port 2, and then passes through the input impedance matcher 10 to optimize the signal impedance and maximize the transmission efficiency, the following process includes the gain processing of the pre-selection filter 11 and the low noise amplifier 12, in order to limit the spectrum and suppress interference, while enhancing the signal strength and maintaining low noise level. On this basis, the signal is transmitted to the isolation amplifier 13 to avoid interference between different circuits and ensure signal quality improvement, the superheterodyne receiving architecture is adopted in the mixing part, and the 1 GHz~18 GHz signal is down-converted to the intermediate frequency signal with a center frequency of 600 MHz through a three-time frequency conversion scheme. The signal then enters the first mixer 15 and mixes with the local oscillator signal provided by the first local oscillator signal generator 14, and the unnecessary high frequency components are removed through the first low pass filter 16. The intermediate frequency signal is processed by the second mixer 17 and the second local oscillator signal generator 18, and further cleaned by the second low pass filter 19. Finally, the operation of the third mixer 21 and the third local oscillator signal generator 20 ensures that the final output IF signal meets the design requirements, and the third low pass filter 22 completes the final low pass filtering, the whole front end size is 160 mm×50 mm×10 mm, the working frequency range is 1 GHz~18 GHz, the typical gain is 55 dB, and the dynamic range reaches 60 dB. In order to reduce the size of the product, multifunctional chips and switch filter chips are selected to optimize the overall design, then through the gain control circuit 24 and the adjustable gain amplifier 25, the receiver dynamically adjusts the strength and quality of the output signal, adapts to various application scenarios and ensures stable operation. At the same time, the whole system is also protected by the protection layer 27, the shock absorbing layer 28 and the shielding layer 29 in terms of physics and electromagnetism, so as to ensure the reliability and durability in different environments. Finally, the cleaned signal flows out through the output filter 26, and the output port 5 provides the signal to the external device.

[0028] The basic principle, main features and advantages of the present application are shown and described above. Those skilled in the art should understand that the present application is not limited by the above examples, and the above examples and descriptions in the specification are only the principles of the present application. Without departing from the spirit and scope of the present application, various changes and improvements can be made to the present application, and these changes and improvements all fall within the scope of the claimed present application. The scope of protection required by the present application is defined by the appended claims and their equivalents.

Claims

1. A miniaturized broadband receiver, comprising: The cavity (1) is characterized in that: an RF signal input port (2) is installed at the front end of one side of the outer surface of the cavity (1), an input impedance matching device (10) is installed through the bottom end of the shaft surface of the RF signal input port (2) and the outer surface of the cavity (1), a preselection filter (11) is provided at the rear end of the outer surface of the input impedance matching device (10), a low noise amplifier (12) is installed at the rear end of the outer surface of the preselection filter (11), an isolation amplifier (13) is installed at the rear end of the outer surface of the low noise amplifier (12), and a first mixer (15) is provided on the right side of the outer surface of the isolation amplifier (13).

2. The miniaturized broadband receiver according to claim 1, characterized in that: A first local oscillator signal generator (14) is installed on the top of the outer surface of the first mixer (15), a first low-pass filter (16) is installed on one side of the outer surface of the first mixer (15), and a second mixer (17) is installed on the right side of the outer surface of the first low-pass filter (16).

3. A miniaturized broadband receiver according to claim 2, characterized in that: A second local oscillator signal generator (18) is mounted on the right side of the outer surface of the second mixer (17). A second low-pass filter (19) is mounted on one side of the outer surface of the second local oscillator signal generator (18). A third local oscillator signal generator (20) is mounted on one side of the outer surface of the second low-pass filter (19). A third mixer (21) is mounted on one side of the outer surface of the third local oscillator signal generator (20).

4. A miniaturized broadband receiver according to claim 3, characterized in that: A third low-pass filter (22) is mounted on the top of the outer surface of the third mixer (21), a switching filter (23) is mounted on the right side of the outer surface of the third low-pass filter (22), and a gain control circuit (24) is mounted on one side of the outer surface of the switching filter (23).

5. A miniaturized broadband receiver according to claim 4, characterized in that: An adjustable gain amplifier (25) is fixedly installed on the bottom of the outer surface of the gain control circuit (24). An output filter (26) is installed on one side of the outer surface of the adjustable gain amplifier (25). An output port (5) is installed on the rear end of the outer surface of the cavity (1).

6. A miniaturized broadband receiver according to claim 1, characterized in that: A power port (3) is provided at the front end of the outer surface of the cavity (1). A power module (7) is installed inside the cavity (1) on the inner side of the power port (3). A DC power supply unit (6) is installed on the left side of the outer surface of the power module (7). A voltage regulator (8) is installed on the right side of the outer surface of the power module (7). A decoupling capacitor (9) is installed on the rear side of the outer surface of the power module (7). A signal light (4) is installed on the right side of the front end of the outer surface of the cavity (1).

7. A miniaturized broadband receiver according to claim 1, characterized in that: The outermost part of the cavity (1) is provided as a protective layer (27); a shock-absorbing layer (28) is provided on the inner side of the protective layer (27), a shielding layer (29) is installed inside the shock-absorbing layer (28), and a support layer (30) is installed on the inner side of the shielding layer (29).

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