Miniaturized short-wave radio frequency processing equipment

Abstract

The utility model discloses a miniaturized short wave radio frequency processing device, which belongs to the technical field of wireless communication equipment and comprises a box body, a PCBA board, two connectors, a radio frequency pre-conditioning module and a signal acquisition processing module, the PCBA board is arranged in the box body, one end of each connector is connected with the PCBA board, the other end of each connector penetrates through the box body and is arranged outside the box body, and the radio frequency pre-conditioning module is connected with the signal acquisition processing module. The two connectors are respectively used for signal input and output of the PCBA board, the radio frequency pre-conditioning module is arranged on the PCBA board and is used for pre-processing radio frequency input signals, the signal acquisition module is arranged on the PCBA board, the signal acquisition processing module is connected with the radio frequency pre-conditioning module, and the signal processing module is connected with the signal acquisition processing module. The signal acquisition and processing module is used for performing digital processing on radio frequency input signals, the miniaturized design mode enables the equipment to maintain high performance, meanwhile, the size and the weight are remarkably reduced, and the equipment adopts an unsegmented acquisition design, so that full-band coverage can be directly realized.

Description

Technical Field

[0001] The utility model belongs to the technical field of wireless communication equipment, and in particular relates to a miniaturized short-wave radio frequency processing device. Background Art

[0002] Shortwave radio frequency processing equipment is a communication device mainly used to process and transmit radio frequency signals in the shortwave frequency band. It plays a vital role in wireless communication systems, mainly completing signal reception, amplification, modulation, demodulation, filtering, encoding and decoding, etc., to ensure the accuracy and reliability of information during transmission. Shortwave communication has the characteristics of long transmission distance, strong anti-interference ability and strong penetration, so it is widely used in military communications, emergency communications, remote monitoring and other fields.

[0003] However, existing RF processing equipment has the following disadvantages:

[0004] 1. According to actual application requirements, the existing equipment has a complex internal structure and requires a series of modulators, amplifiers and other components. These components require sufficient space for layout, resulting in a heavy device chassis that is not easy to carry and transport, limiting its application flexibility.

[0005] 2. Most of the existing equipment adopts segmented acquisition method, which requires multiple AD chips for data acquisition and then data splicing. The number of devices required is more than that of non-segmented acquisition. The embedded implementation is complex, the implemented volume is large, and the power consumption is high. Utility Model Content

[0006] In order to solve the problems raised in the above background technology, the utility model provides a miniaturized shortwave radio frequency processing device to solve the problems that the existing equipment has too many and complex components, resulting in excessive size of the equipment and complex component embedded implementation.

[0007] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0008] A miniaturized shortwave radio frequency processing device, comprising:

[0009] Box body;

[0010] PCBA board: The PCBA board is arranged in the box body;

[0011] Two connectors; one end of the two connectors is connected to the PCBA board, and the other ends of the two connectors are passed through the box body and arranged outside the box body. The two connectors are used for signal input and output of the PCBA board respectively;

[0012] RF pre-conditioning module: The RF pre-conditioning module is arranged on the PCBA board, and the RF pre-conditioning module is used to pre-process the RF input signal;

[0013] Signal acquisition and processing module: The signal acquisition module is arranged on the PCBA board, the signal acquisition and processing module is connected to the RF pre-conditioning module, and the signal acquisition and processing module is used to digitally process the RF input signal.

[0014] Preferably, the radio frequency pre-conditioning module includes:

[0015] Limiter: The limiter is used to limit the RF input signal and output it;

[0016] A first attenuator; the first attenuator is connected to the limiter, and the first attenuator is used to adjust the attenuation value of the RF input signal after limiting and output it;

[0017] A first filter; the first filter is connected to the first attenuator, and the first filter is used to filter and output the signal output by the first attenuator;

[0018] A first amplifier; the first amplifier is connected to the first filter, and the first amplifier is used to amplify and output the signal output by the first filter;

[0019] A second filter; the second filter is connected to the first amplifier, and the second filter is used to filter and output the signal output by the first amplifier;

[0020] A second attenuator; the second attenuator is connected to the second filter, and the second attenuator is used to adjust the attenuation value of the signal output by the second filter and output it;

[0021] The second amplifier is connected to the second attenuator, and is used to amplify the signal output by the second attenuator and output it to the signal acquisition module processing module.

[0022] Preferably, the signal acquisition module processing module includes:

[0023] The analog-to-digital conversion unit is connected to the second amplifier, and is used to digitize and output the signal output by the second amplifier;

[0024] Digital processing unit; the digital processing unit is connected to the analog-to-digital conversion unit, and the digital processing unit is used to process the digitized signal into broadband data and spectrum data and output it through the connector;

[0025] Clock unit; the clock unit is connected to the analog-to-digital conversion unit, and the clock unit is used to provide a reference clock for the analog-to-digital conversion unit.

[0026] Preferably, the analog-to-digital conversion unit comprises:

[0027] A balun converter; the balun converter is connected to the second amplifier, and the balun converter is used to perform level conversion on the output signal of the second amplifier and output it;

[0028] A programmable gain amplifier; the programmable gain amplifier is connected to the balun converter, and the programmable gain amplifier is used to amplify and output the output signal of the balun converter;

[0029] Low-pass filter; the low-pass filter is connected to the programmable gain amplifier, and the low-pass filter suppresses and outputs the output signal of the programmable gain amplifier in a differential manner;

[0030] Analog-to-digital converter; the analog-to-digital converter is connected to the low-pass filter, and the analog-to-digital converter is used to convert the output signal of the low-pass filter into a digital signal and output it to the digital processing unit.

[0031] Preferably, the digital processing unit further comprises a packaging module, which is used to package the data for broadband data and spectrum data processing and add time information to the data before outputting it through a connector.

[0032] Compared with the prior art, the beneficial effects of the utility model are:

[0033] The miniaturized design mode of this application enables the device to significantly reduce its size and weight while maintaining high performance, making it easier to carry and transport, improving the mobility and flexibility of the device, and can expand its application in aviation, navigation and other fields. In addition, this device adopts a non-segmented acquisition design, which can directly achieve full-band coverage. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 This is a schematic diagram of the structure of this application;

[0035] Figure 2 This is a schematic diagram of the working principle of this application;

[0036] Figure 3 This is a schematic diagram of the working principle of the RF pre-conditioning module.

[0037] The markings in the figure are:

[0038] 1-cover; 2-PCBA board; 3-box body; 4-connector. DETAILED DESCRIPTION

[0039] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0040] Embodiment 1:

[0041] like Figure 1 , Figure 2 As shown, a miniaturized shortwave radio frequency processing device comprises:

[0042] A box body 3; a cover plate 1 is provided on the box body 3, and the box body 3 has electromagnetic shielding performance and heat dissipation performance;

[0043] Upper cover 1: Mainly used to close the module cavity, protect the internal circuits and components of the device from the influence of the external environment, and have electromagnetic shielding and heat dissipation performance.

[0044] PCBA board 2; PCBA board 2 is arranged in the box body 3, the thickness of PCB board 2 is 1.0 mm, and the specific size is 150 mm*80 mm*7 mm;

[0045] Two connectors 4; one end of the two connectors 4 is connected to the PCBA board 2, and the other ends of the two connectors 4 pass through the box body 3 and are arranged outside the box body 3. The two connectors 4 are respectively used for signal input and output of the PCBA board 2;

[0046] RF pre-conditioning module: The RF pre-conditioning module is arranged on the PCBA board 2, and the RF pre-conditioning module is used to pre-process the RF input signal;

[0047] Signal acquisition and processing module: The signal acquisition module is arranged on the PCBA board 2, the signal acquisition and processing module is connected to the RF pre-conditioning module, and the signal acquisition and processing module is used to digitally process the RF input signal.

[0048] In this embodiment, the RF pre-conditioning module receives a RF input signal, and the signal is input to the programmable attenuator after passing through the limit protection circuit. The attenuator can adjust the attenuation value according to the signal size to ensure that the back-end device can work normally. The out-of-band signal is filtered through a bandpass filter and a low-pass anti-aliasing filter, and then output to the analog-to-digital conversion unit for digitization. The signal acquisition and processing module performs digital processing on the received intermediate frequency or baseband signal, including demodulation, decoding, filtering, equalization, etc. Usually, the ADC converts the analog signal into a digital signal, and the DSP executes complex algorithms to realize signal demodulation, decoding and other processing.

[0049] The PCB thickness of this device is 1.0mm, and the size is 150mm*80mm*7mm. This miniaturized design mode allows the device to significantly reduce the volume and weight while maintaining high performance, making it easier to carry and transport, improving the mobility and flexibility of the device, and can expand its application in aviation, navigation and other fields.

[0050] This device adopts non-segmented acquisition design to directly achieve full frequency band coverage. The segmented acquisition design directly acquires signals in the 225MHz to 480MHz frequency band, which can better achieve 175MHz instantaneous processing bandwidth at a lower cost.

[0051] For devices or modules with high internal temperatures, this equipment uses aluminum material with good thermal conductivity to increase the heat dissipation area. At the same time, the module cavity has heat dissipation performance, which increases the ventilation volume of the equipment and creates conditions for working at the specified temperature.

[0052] In summary, miniaturized domestic shortwave RF processing equipment has significant advantages in terms of size, cost, adaptability, technology update, integration, safety, etc., and can meet the application needs of more users in different occasions.

[0053] Embodiment 2:

[0054] The difference between this embodiment and embodiment 1 is that Figure 3 As shown, the RF pre-conditioning module includes:

[0055] Limiter: The limiter is used to limit the RF input signal and output it;

[0056] A first attenuator; the first attenuator is connected to the limiter, and the first attenuator is used to adjust the attenuation value of the RF input signal after limiting and output it;

[0057] A first filter; the first filter is connected to the first attenuator, and the first filter is used to filter and output the signal output by the first attenuator;

[0058] A first amplifier; the first amplifier is connected to the first filter, and the first amplifier is used to amplify and output the signal output by the first filter;

[0059] A second filter; the second filter is connected to the first amplifier, and the second filter is used to filter and output the signal output by the first amplifier;

[0060] A second attenuator; the second attenuator is connected to the second filter, and the second attenuator is used to adjust the attenuation value of the signal output by the second filter and output it;

[0061] The second amplifier is connected to the second attenuator, and is used to amplify the signal output by the second attenuator and output it to the signal acquisition module processing module.

[0062] In this embodiment, the link of the RF pre-conditioning module consists of two-stage amplification and two-stage attenuation. The pre-amplifier mainly performs low-noise amplification of the signal, and the system noise coefficient is about 5dB. The post-amplification is mainly to improve the link gain. After two stages of amplification, the total link gain is about 30dB. Attenuator 1 (RF attenuation) provides 0~31dB attenuation (attenuation control first 8 bits), and its main function is to perform attenuation control when detecting large signals; attenuator 2 (intermediate frequency attenuation) provides 0~21dB (attenuation control last 8 bits), and its function is to adjust the signal size when a normal signal is detected.

[0063] The limiter uses an integrated limiting chip, with an insertion loss as low as 0.4dB, an output IP3 of 30dBm, an output IP2 of 70dBm, a maximum input power of 33dBm, and a typical output power of 13dBm. The programmable attenuator uses an integrated chip, and the design uses an attenuator chip with good linearity. The single attenuation gain control range is 31.5dB. The attenuator is a 6-bit adjustable attenuator that can be adjusted in steps of 0.5dB, with a maximum adjustment range of 31.5dB. The programmable amplifier is a dual-channel differential digitally controlled variable gain amplifier (DGA). The programmable amplifier is mainly used to amplify the signal when the signal is small so that the AD works in the best state. The programmable gain amplifier uses the industry's low-noise high-dynamic amplifier. The maximum gain of the amplifier is 26dB, and the variable gain range exceeds 30dB. It has good HD2 and HD3 suppression capabilities and excellent output third-order intercept point indicators. A low-pass matching filter is added to the output of the programmable gain amplifier. The low-pass filter at the output of the amplifier can filter out signal harmonics on the one hand, and increase image frequency suppression on the other hand, which is used to further filter the RF signal output by the amplifier to ensure the realization of the image frequency suppression index of the AD.

[0064] Embodiment 3:

[0065] The difference between this embodiment and embodiment 2 is that Figure 2 As shown, the signal acquisition module processing module includes:

[0066] The analog-to-digital conversion unit is connected to the second amplifier, and is used to digitize and output the signal output by the second amplifier;

[0067] Digital processing unit; the digital processing unit is connected to the analog-to-digital conversion unit, and the digital processing unit is used to process the digitized signal into broadband data and spectrum data and output it through the connector 4;

[0068] The digital processing unit mainly has an analog-to-digital conversion unit interface and a data transmission interface. The digital processing unit receives the digital signal transmitted by the analog-to-digital conversion unit, completes the broadband data and spectrum data processing, and finally completes the packaging of all data in the packaging module, and after adding the time information input from the BD / GPS timing, it can also be output through PCIe; the digital processing unit receives the host computer command, controls the scanning beam forming device through the serial port, and automatically switches the beam pointing.

[0069] Clock unit; the clock unit is connected to the analog-to-digital conversion unit, and the clock unit is used to provide a reference clock for the analog-to-digital conversion unit.

[0070] Embodiment 4:

[0071] The difference between this embodiment and embodiment 3 is that the analog-to-digital conversion unit includes:

[0072] A balun converter; the balun converter is connected to the second amplifier, and the balun converter is used to perform level conversion on the output signal of the second amplifier and output it;

[0073] A programmable gain amplifier; the programmable gain amplifier is connected to the balun converter, and the programmable gain amplifier is used to amplify and output the output signal of the balun converter;

[0074] Low-pass filter; the low-pass filter is connected to the programmable gain amplifier, and the low-pass filter suppresses and outputs the output signal of the programmable gain amplifier in a differential manner;

[0075] Analog-to-digital converter; the analog-to-digital converter is connected to the low-pass filter, and the analog-to-digital converter is used to convert the output signal of the low-pass filter into a digital signal and output it to the digital processing unit.

[0076] In this embodiment, after the device determines the sampling frequency, an AD chip is used to complete the digitization of the analog signal. The output signal of the RF pre-conditioning module is connected to the analog-to-digital conversion unit, and the signal single-ended and differential level conversion is realized on the balun of the analog-to-digital conversion unit. After amplification by the programmable gain amplifier, it is connected through the filter (LPF) module. The filter adopts a differential method to improve the suppression of the image frequency signal. After the ADC collects the data, it is transmitted to the digital processing unit.

Claims

1. A miniaturized shortwave radio frequency processing device, characterized in that: include: Box body (3); PCBA board (2); the PCBA board (2) is arranged in the box body (3); Two connectors (4); one end of each of the two connectors (4) is connected to the PCBA board (2), and the other ends of each of the two connectors (4) pass through the box body (3) and are arranged outside the box body (3); the two connectors (4) are respectively used for signal input and output of the PCBA board (2); A radio frequency pre-conditioning module; the radio frequency pre-conditioning module is arranged on the PCBA board (2), and the radio frequency pre-conditioning module is used to pre-process the radio frequency input signal; Signal acquisition and processing module; the signal acquisition and processing module is arranged on the PCBA board (2), the signal acquisition and processing module is connected to the radio frequency pre-conditioning module, and the signal acquisition and processing module is used to perform digital processing on the radio frequency input signal.

2. A miniaturized shortwave radio frequency processing device according to claim 1, characterized in that: The RF pre-conditioning module includes: Limiter: The limiter is used to limit the RF input signal and output it; A first attenuator; the first attenuator is connected to the limiter, and the first attenuator is used to adjust the attenuation value of the RF input signal after limiting and output it; A first filter; the first filter is connected to the first attenuator, and the first filter is used to filter and output the signal output by the first attenuator; A first amplifier; the first amplifier is connected to the first filter, and the first amplifier is used to amplify and output the signal output by the first filter; A second filter; the second filter is connected to the first amplifier, and the second filter is used to filter and output the signal output by the first amplifier; A second attenuator; the second attenuator is connected to the second filter, and the second attenuator is used to adjust the attenuation value of the signal output by the second filter and output it; The second amplifier is connected to the second attenuator, and is used to amplify the signal output by the second attenuator and output it to the signal acquisition module processing module.

3. A miniaturized shortwave radio frequency processing device according to claim 2, characterized in that: The signal acquisition module and processing module include: The analog-to-digital conversion unit is connected to the second amplifier, and is used to digitize and output the signal output by the second amplifier; A digital processing unit; the digital processing unit is connected to the analog-to-digital conversion unit, and the digital processing unit is used to process the digitized signal into broadband data and spectrum data and output it through the connector (4); Clock unit; the clock unit is connected to the analog-to-digital conversion unit, and the clock unit is used to provide a reference clock for the analog-to-digital conversion unit.

4. A miniaturized shortwave radio frequency processing device according to claim 3, characterized in that: The analog-to-digital conversion unit includes: A balun converter; the balun converter is connected to the second amplifier, and the balun converter is used to perform level conversion on the output signal of the second amplifier and output it; A programmable gain amplifier; the programmable gain amplifier is connected to the balun converter, and the programmable gain amplifier is used to amplify and output the output signal of the balun converter; Low-pass filter; the low-pass filter is connected to the programmable gain amplifier, and the low-pass filter suppresses and outputs the output signal of the programmable gain amplifier in a differential manner; Analog-to-digital converter; the analog-to-digital converter is connected to the low-pass filter, and the analog-to-digital converter is used to convert the output signal of the low-pass filter into a digital signal and output it to the digital processing unit.

5. A miniaturized shortwave radio frequency processing device according to claim 3, characterized in that: The digital processing unit also includes a packaging module, which is used to package the data for broadband data and spectrum data processing and add time information to the data, and then output it through a connector (4).

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