Miniaturized multi-functional frequency source
Patent Information
- Application Number
- CN202522093326.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-09-29
- Publication Date
- 2026-09-15
- Estimated Expiration
- 2035-09-29
AI Technical Summary
[0016]By highly integrating multiple functional circuit boards, including a built-in crystal oscillator circuit board, a DDS clock circuit board, a DDS circuit board, a phase-locked loop circuit board, a low-frequency filter circuit board, a high-frequency filter circuit board, and an amplification and attenuation circuit board, into a single housing, the device achieves miniaturization and modularity, greatly saving installation space. Secondly, the hybrid architecture combining the DDS circuit board and the phase-locked loop circuit board gives the frequency source excellent multi-functional characteristics such as fast frequency switching speed, high frequency resolution, wide output bandwidth, and low phase noise. Thirdly, the independent low-frequency and high-frequency filter circuit boards, in conjunction with the professional amplification and attenuation circuit boards, effectively ensure that the output signal has extremely high spectral purity and precise and stable amplitude power across the entire frequency band. Finally, the integrated design consisting of a protective shell, a rear cover, and a housing enhances the device's mechanical strength and anti-interference capabilities, improves environmental adaptability, simplifies the production and assembly process, and gives the entire frequency source the advantages of high reliability, excellent performance, and ease of mass production.
Smart Images
Figure CN224760236U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of signal equipment technology, specifically relating to a miniaturized multifunctional frequency source. Background Technology
[0002] Frequency sources, as core components of electronic systems, are widely used in communications, radar, test and measurement, and various radio frequency and microwave equipment. Their performance directly determines the technical specifications of the entire system. Currently, common frequency sources mainly include frequency synthesizers based on phase-locked loop (PLL) technology, signal generators based on direct digital synthesis (DDS) technology, and hybrid schemes of these.
[0003] However, existing frequency source technologies still have many shortcomings. First, traditional frequency source modules typically employ a discrete design, placing circuits such as the reference crystal oscillator, phase-locked loop, filter, and amplifier in separate physical modules, which are then interconnected by cables. This design approach results in bulky and loosely structured devices, making it difficult to meet the increasingly urgent demands of modern electronic devices for miniaturization and integration.
[0004] Secondly, their functions are relatively limited. While a single phase-locked loop (PLL) frequency source can generate high-frequency signals, its frequency switching speed is slow and its frequency resolution is limited. Conversely, a single digital signal source (DDS) frequency source, while offering advantages in fast switching and high resolution, often suffers from poor output frequency range and spectral purity of mid-to-high frequency signals. Current solutions that simply combine the two fail to efficiently address the filtering issues of high and low frequency signals and lack comprehensive amplitude control functions, making it difficult for a single device to achieve multi-functional output with wide frequency coverage, high spectral purity, and precise power control.
[0005] Furthermore, the lengthy interconnects resulting from discrete architecture introduce additional noise, interference, and signal loss, which not only reduces system reliability but also worsens the phase noise and spurious levels of the output signal. At the same time, multi-module assembly processes are complex and costly, hindering mass production and application. Utility Model Content
[0006] The purpose of this invention is to provide a miniaturized, multifunctional frequency source, which aims to solve the problems raised in the background art.
[0007] A miniaturized multifunctional frequency source, comprising,
[0008] A storage shell, wherein an installation groove is provided on one side of the outer wall of the storage shell;
[0009] The housing is fitted with a built-in crystal oscillator circuit board, a DDS clock circuit board, a DDS circuit board, a phase-locked loop circuit board, a low-frequency filter circuit board, a high-frequency filter circuit board, and an amplification and attenuation circuit board via mounting slots. A protective shell is embedded in a groove on one side of the outer wall of the housing, and a back cover is embedded in a groove on the other side of the outer wall of the housing. The output terminal of the built-in crystal oscillator circuit board is connected to the input terminal of the DDS clock circuit board to provide a reference signal. The output terminal of the DDS clock circuit board is connected to the clock input terminal of the DDS circuit board to provide a working clock. The output terminal of the DDS circuit board is connected to the input terminal of the phase-locked loop circuit board. The output terminal of the phase-locked loop circuit board is connected to the input terminals of the low-frequency filter circuit board and the high-frequency filter circuit board, respectively. The output terminals of the low-frequency filter circuit board and the high-frequency filter circuit board are both connected to the input terminals of the amplification and attenuation circuit board.
[0010] Furthermore, a program update port is provided on one edge of the outer wall of the storage shell.
[0011] Furthermore, a sealing block is embedded in the inner wall of the program update port.
[0012] Furthermore, the DDS circuit board and the phase-locked loop circuit board together constitute a DDS+PLL hybrid frequency synthesis architecture.
[0013] Furthermore, the low-frequency filter circuit board is an LC bandpass filter used to filter out high-frequency spurious signals in the low-frequency band.
[0014] Furthermore, the high-frequency filtering circuit board is a microstrip line or thin-film ceramic filter, used to filter out harmonics and out-of-band noise of high-frequency signals, and the amplification and attenuation circuit board integrates a digitally controlled attenuator and an amplifier, used to realize amplitude adjustment and power amplification of the output signal.
[0015] Compared with the prior art, the beneficial effects of this utility model are:
[0016] By highly integrating multiple functional circuit boards, including a built-in crystal oscillator circuit board, a DDS clock circuit board, a DDS circuit board, a phase-locked loop circuit board, a low-frequency filter circuit board, a high-frequency filter circuit board, and an amplification and attenuation circuit board, into a single housing, the device achieves miniaturization and modularity, greatly saving installation space. Secondly, the hybrid architecture combining the DDS circuit board and the phase-locked loop circuit board gives the frequency source excellent multi-functional characteristics such as fast frequency switching speed, high frequency resolution, wide output bandwidth, and low phase noise. Thirdly, the independent low-frequency and high-frequency filter circuit boards, in conjunction with the professional amplification and attenuation circuit boards, effectively ensure that the output signal has extremely high spectral purity and precise and stable amplitude power across the entire frequency band. Finally, the integrated design consisting of a protective shell, a rear cover, and a housing enhances the device's mechanical strength and anti-interference capabilities, improves environmental adaptability, simplifies the production and assembly process, and gives the entire frequency source the advantages of high reliability, excellent performance, and ease of mass production. Attached Figure Description
[0017] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:
[0018] Figure 1 This is a perspective view of the present utility model;
[0019] Figure 2 This is a perspective view of the built-in crystal oscillator circuit board of this utility model;
[0020] Figure 3 This is a perspective view of the back cover of this utility model.
[0021] In the diagram: 1. Storage shell; 2. Protective shell; 3. Program update port; 4. Sealing block; 5. Back cover; 101. Built-in crystal oscillator circuit board; 102. DDS clock circuit board; 103. DDS circuit board; 104. Phase-locked loop circuit board; 105. Low-frequency filter circuit board; 106. High-frequency filter circuit board; 107. Amplification and attenuation circuit board. Detailed Implementation
[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0023] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," "outer," "top / bottom," etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.
[0024] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "sleeved / connected," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.
[0025] Please see Figure 1-3 The technical solution provided in this embodiment is as follows:
[0026] A miniaturized multifunctional frequency source, comprising,
[0027] Storage shell 1, with an installation groove on one side of the outer wall of storage shell 1;
[0028] The housing 1 has a mounting slot housing a built-in crystal oscillator circuit board 101, a DDS clock circuit board 102, a DDS circuit board 103, a phase-locked loop circuit board 104, a low-frequency filter circuit board 105, a high-frequency filter circuit board 106, and an amplification and attenuation circuit board 107. A protective shell 2 is installed in a groove on one side of the outer wall of the housing 1, and a back cover 5 is installed in a groove on the other side of the outer wall of the housing 1. The output terminal of the built-in crystal oscillator circuit board 101 is connected to the input terminal of the DDS clock circuit board 102 to provide a reference signal. The output terminal of the DDS clock circuit board 102 is connected to the clock input terminal of the DDS circuit board 103 to provide a working clock. The output terminal of the DDS circuit board 103 is connected to the input terminal of the phase-locked loop circuit board 104. The output terminal of the phase-locked loop circuit board 104 is connected to the input terminals of the low-frequency filter circuit board 105 and the high-frequency filter circuit board 106, respectively. The output terminals of the low-frequency filter circuit board 105 and the high-frequency filter circuit board 106 are both connected to the input terminal of the amplification and attenuation circuit board 107.
[0029] In a specific embodiment of this utility model, a built-in crystal oscillator circuit board 101 generates a highly stable reference clock signal. This signal is sent to a DDS clock circuit board 102 as the core time base for system synchronization. Subsequently, the DDS clock circuit board 102 drives the DDS circuit board 103 to operate. The DDS circuit board 103, according to preset instructions, precisely synthesizes an analog signal with the required frequency and phase digitally. This signal is then sent to a phase-locked loop circuit board 104 for frequency conversion. The phase-locked loop circuit board 104, through tracking and frequency multiplication, converts the signal to a higher frequency band, while significantly increasing its frequency. To improve its spectral purity and frequency stability, the signal output from the phase-locked loop circuit board 104 then enters a parallel processing path, where it is purified by the low-frequency filter circuit board 105 and the high-frequency filter circuit board 106. The low-frequency filter circuit board 105 specifically filters out high-frequency spurious components in the low-frequency signal, while the high-frequency filter circuit board 106 focuses on suppressing harmonics and out-of-band noise in the high-frequency signal, ensuring that the signal has extremely high purity across a wide frequency band. Finally, the clean signal after filtering is sent to the amplification and attenuation circuit board 107, where the signal amplitude is precisely controlled and amplified to achieve the required output power. The frequency source can be attenuated to achieve precise amplitude control, ultimately outputting a high-performance, high-complete frequency signal. By highly integrating multiple functional circuit boards—including a built-in crystal oscillator circuit board 101, a DDS clock circuit board 102, a DDS circuit board 103, a phase-locked loop circuit board 104, a low-frequency filter circuit board 105, a high-frequency filter circuit board 106, and an amplification and attenuation circuit board 107—into a single housing 1, the device achieves miniaturization and modularity, significantly saving installation space. Furthermore, the hybrid architecture combining the DDS circuit board 103 and the phase-locked loop circuit board 104 allows the frequency source to simultaneously possess frequency... It boasts excellent multi-functional characteristics such as fast switching speed, high frequency resolution, wide output bandwidth, and low phase noise. Furthermore, the independent low-frequency filter circuit board 105 and high-frequency filter circuit board 106, together with the professional amplification and attenuation circuit board 107, effectively ensure that the output signal has extremely high spectral purity and precise and stable amplitude power across the entire frequency band. Finally, the integrated design consisting of the protective shell 2, the rear cover 5, and the storage shell 1 enhances the mechanical strength and anti-interference capability of the device, improves environmental adaptability, simplifies the production and assembly process, and gives the entire frequency source the advantages of high reliability, excellent performance, and ease of mass production.
[0030] Specifically, a program update port 3 is provided on one edge of the outer wall of the storage shell 1.
[0031] In a specific embodiment of this utility model, the program update port 3 allows for convenient modification and updating of the program.
[0032] Specifically, a sealing block 4 is embedded in the inner wall of the program update port 3.
[0033] In a specific embodiment of this utility model, the sealing block 4 can ensure the sealing of the program update port 3.
[0034] Specifically, the DDS circuit board 103 and the phase-locked loop circuit board 104 together form a DDS+PLL hybrid frequency synthesis architecture.
[0035] In a specific embodiment of this utility model, the hybrid frequency synthesis architecture can ensure versatility.
[0036] Specifically, the low-frequency filter circuit board 105 is an LC bandpass filter used to filter out high-frequency spurious signals in the low-frequency band.
[0037] In specific embodiments of this invention, signal noise can be significantly reduced.
[0038] Specifically, the high-frequency filter circuit board 106 is a microstrip line or thin-film ceramic filter used to filter out harmonics and out-of-band noise of high-frequency signals, and the amplification and attenuation circuit board 107 integrates a digitally controlled attenuator and an amplifier to realize amplitude adjustment and power amplification of the output signal.
[0039] In a specific embodiment of this utility model, the high-frequency filter circuit board 106 can achieve stable noise filtering.
[0040] Working principle:
[0041] An integrated crystal oscillator circuit board 101 generates a highly stable reference clock signal, which is sent to a DDS clock circuit board 102 as the core time base for system synchronization. Subsequently, the DDS clock circuit board 102 drives the DDS circuit board 103. The DDS circuit board 103, according to preset instructions, precisely synthesizes an analog signal with the required frequency and phase digitally. This signal is then sent to a phase-locked loop (PLL) circuit board 104 for frequency conversion. The PLL circuit board 104, through tracking and frequency multiplication, converts the signal to a higher frequency band, significantly improving its spectral purity and frequency stability. The output of the PLL circuit board 104... The signal then enters the parallel processing path, where it is purified by the low-frequency filter circuit board 105 and the high-frequency filter circuit board 106. The low-frequency filter circuit board 105 is specifically designed to filter out high-frequency spurious components in the low-frequency signal, while the high-frequency filter circuit board 106 focuses on suppressing harmonics and out-of-band noise in the high-frequency signal, ensuring that the signal has extremely high purity across a wide frequency band. Finally, the clean signal after filtering is sent to the amplification and attenuation circuit board 107, where the signal amplitude is precisely controlled. It can be amplified to achieve the required output power level or attenuated to achieve precise amplitude control, ultimately outputting a high-performance, high-complete frequency signal.
[0042] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.
Claims
1. A miniaturized multifunctional frequency source, characterized in that, include, Storage shell (1), wherein an installation groove is provided on one side of the outer wall of the storage shell (1); The housing (1) is fitted with a built-in crystal oscillator circuit board (101), a DDS clock circuit board (102), a DDS circuit board (103), a phase-locked loop circuit board (104), a low-frequency filter circuit board (105), a high-frequency filter circuit board (106), and an amplification and attenuation circuit board (107) via mounting slots. A protective shell (2) is embedded in a groove on one side of the outer wall of the housing (1), and a back cover (5) is embedded in a groove on the other side of the outer wall of the housing (1). The output terminal of the built-in crystal oscillator circuit board (101) is connected to the input terminal of the DDS clock circuit board (102) to provide a reference signal. The output terminal of the DS clock circuit board (102) is connected to the clock input terminal of the DDS circuit board (103) to provide it with a working clock. The output terminal of the DDS circuit board (103) is connected to the input terminal of the phase-locked loop circuit board (104). The output terminal of the phase-locked loop circuit board (104) is connected to the input terminal of the low-frequency filter circuit board (105) and the input terminal of the high-frequency filter circuit board (106) respectively. The output terminals of the low-frequency filter circuit board (105) and the high-frequency filter circuit board (106) are both connected to the input terminal of the amplification and attenuation circuit board (107).
2. The miniaturized multifunctional frequency source according to claim 1, characterized in that, A program update port (3) is provided on one edge of the outer wall of the storage shell (1).
3. The miniaturized multifunctional frequency source according to claim 1, characterized in that, The inner wall of the program update port (3) is fitted with a sealing block (4).
4. A miniaturized multifunctional frequency source according to claim 1, characterized in that, The DDS circuit board (103) and the phase-locked loop circuit board (104) together constitute a DDS+PLL hybrid frequency synthesis architecture.
5. A miniaturized multifunctional frequency source according to claim 1, characterized in that, The low-frequency filter circuit board (105) is an LC bandpass filter used to filter out high-frequency spurious signals in the low-frequency band.
6. A miniaturized multifunctional frequency source according to claim 1, characterized in that, The high-frequency filtering circuit board (106) is a microstrip line or thin-film ceramic filter used to filter out harmonics and out-of-band noise of high-frequency signals. The amplification and attenuation circuit board (107) integrates a digitally controlled attenuator and an amplifier to realize amplitude adjustment and power amplification of the output signal.