Frequency synthesizer receiver module with full-function output
By designing a frequency synthesizer receiver module with multi-stage power division and filtering, the problem that existing frequency synthesizer receivers can only generate single-frequency signals is solved, and stable output of multiple frequency signals is achieved, meeting the needs of complex phased array radars.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-05-22
- Publication Date
- 2026-04-14
Smart Images
Figure CN224124126U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of frequency synthesizer receiver technology, and specifically to a frequency synthesizer receiver module with full-function output. Background Technology
[0002] A frequency synthesizer receiver, also called a frequency synthesizer or frequency source, primarily functions to generate various forms of frequency signals required by electronic systems. These include single-frequency continuous waves, frequency-hopping signals, stepped-frequency signals, linear frequency-modulated signals, nonlinear frequency-modulated signals, IQ-modulated signals, and many other signal formats needed by electronic systems. A frequency synthesizer typically selects a highly stable oscillator based on the requirements of the entire system. Using this oscillator as a reference, it generates multiple required frequency signals through frequency division, frequency multiplication, mixing, and power amplification. The technologies employed mainly include PLLs, DDSs, comb spectrum generation, switched filtering components, and low-noise amplification. Commercially available frequency synthesizers can only generate single-frequency signals, resulting in relatively simple functionality that cannot meet the requirements of complex phased-array radars. Therefore, this invention proposes a frequency synthesizer receiver module with full-function output to improve upon these problems. Utility Model Content
[0003] Therefore, the technical problem to be solved by this utility model is to overcome the defect of existing frequency synthesizer receivers that can only generate a single frequency signal, thereby providing a frequency synthesizer receiver module with full-function output.
[0004] To address the aforementioned problems, this utility model provides a frequency synthesizer receiver module with full-function output, comprising: a reference signal generation link, a transmit excitation signal generation link, a local oscillator signal generation link, and a high-frequency local oscillator link. The reference signal generation link generates a 10MHz test reference signal and an 80MHz test reference signal. The input terminals of the transmit excitation signal generation link, the local oscillator signal generation link, and the high-frequency local oscillator link are respectively connected to the reference signal generation link. The transmit excitation signal generation link generates a transmit excitation signal with modulation characteristics. The local oscillator signal generation link generates a local oscillator signal. The high-frequency local oscillator link generates the local oscillator signal required for high-frequency mixing.
[0005] A mixing output link, wherein the input terminals of the mixing output link are respectively connected to the input terminals of the transmit excitation signal generation link, the local oscillator signal generation link and the high-frequency local oscillator link, and the output terminal of the mixing output link outputs a fully modulated signal of the target frequency band.
[0006] Preferably, the reference signal generation link includes a crystal oscillator, a first amplifier, a first power divider, a second power divider, an 8-fold divider, a second amplifier, and a first filter connected in sequence.
[0007] Preferably, the reference signal generation link further includes a third amplifier and a second filter connected in sequence, with the input of the third amplifier connected to the output of the second power divider.
[0008] Preferably, the transmit excitation signal generation link includes a PLL1, a fourth amplifier, a DDS, and a third filter connected in sequence, with the input terminal of the PLL1 connected to the output terminal of the first power divider.
[0009] Preferably, the local oscillator signal generation link includes a PLL2, a fifth amplifier, a third power divider, and a sixth amplifier connected in sequence. The sixth amplifier is connected in parallel with a seventh amplifier. The input terminals of the sixth amplifier and the seventh amplifier are respectively connected to the third power divider. The input terminal of the PLL2 is connected to the output terminal of the first power divider.
[0010] Preferably, the high-frequency local oscillator link includes: PLL3, a fourth power divider, and a ninth amplifier. The ninth amplifier is connected in parallel with a tenth amplifier. The input terminals of the ninth amplifier and the tenth amplifier are respectively connected to the output terminals of the fourth power divider. The output terminals of the ninth amplifier and the tenth amplifier are also respectively connected to a fifth filter and a sixth filter.
[0011] Preferably, the mixing output link includes: a first mixer, a second mixer, and a third mixer, wherein the input terminal of the first mixer is connected to the output terminal of the third filter and the sixth amplifier, respectively, and the output terminal of the first mixer is connected to a fourth filter and an eighth amplifier.
[0012] Preferably, the input terminal of the second mixer is connected to the output terminals of the eighth amplifier and the fifth filter, respectively, and the output terminal of the second mixer is connected to the eighth filter.
[0013] Preferably, the input terminal of the third mixer is connected to the output terminals of the third amplifier and the sixth filter, respectively, and the output terminal of the third mixer is connected to the seventh filter.
[0014] The frequency synthesizer receiver module with full-function output provided by this utility model has the following beneficial effects:
[0015] This invention uses an 80MHz isothermal crystal oscillator as the core reference source. Through multi-stage power division, frequency division, and filtering, it stably outputs a 10MHz / 80MHz test reference signal with high frequency stability. It provides a unified phase reference for the entire system, ensuring the synchronization of signals in each module and meeting the requirements of high-precision frequency synthesis and signal processing. It has the advantages of low phase noise, low spurious emissions, strong anti-interference ability, high integration, and strong environmental adaptability. Attached Figure Description
[0016] Figure 1 This is a schematic diagram of the connection block of the frequency synthesizer receiver module of this utility model. Detailed Implementation
[0017] like Figure 1 As shown, this utility model provides a frequency synthesizer receiver module with full-function output, which includes:
[0018] The system includes a reference signal generation link, a transmit excitation signal generation link, a local oscillator signal generation link, and a high-frequency local oscillator link. The reference signal generation link generates a 10MHz test reference signal and an 80MHz test reference signal. The input terminals of the transmit excitation signal generation link, the local oscillator signal generation link, and the high-frequency local oscillator link are respectively connected to the reference signal generation link. The transmit excitation signal generation link generates a transmit excitation signal with modulation characteristics. The local oscillator signal generation link generates a local oscillator signal. The high-frequency local oscillator link generates the local oscillator signal required for high-frequency mixing.
[0019] A mixing output link, wherein the input terminals of the mixing output link are respectively connected to the input terminals of the transmit excitation signal generation link, the local oscillator signal generation link and the high-frequency local oscillator link, and the output terminal of the mixing output link outputs a fully modulated signal of the target frequency band.
[0020] In some embodiments, the reference signal generation link includes a crystal oscillator, a first amplifier, a first power divider, a second power divider, an 8-fold divider, a second amplifier, and a first filter connected in sequence.
[0021] In some implementations, the reference signal generation link further includes a third amplifier and a second filter connected in sequence, with the input of the third amplifier connected to the output of the second power divider.
[0022] In some embodiments, the transmit excitation signal generation link includes a PLL1, a fourth amplifier, a DDS, and a third filter connected in sequence, with the input of the PLL1 connected to the output of the first power divider.
[0023] In some embodiments, the local oscillator signal generation link includes a PLL2, a fifth amplifier, a third power divider, and a sixth amplifier connected in sequence. The sixth amplifier is connected in parallel with a seventh amplifier. The input terminals of the sixth amplifier and the seventh amplifier are respectively connected to the third power divider. The input terminal of the PLL2 is connected to the output terminal of the first power divider.
[0024] In some embodiments, the high-frequency local oscillator link includes: PLL3, a fourth power divider, and a ninth amplifier. The ninth amplifier is connected in parallel with a tenth amplifier. The input terminals of the ninth amplifier and the tenth amplifier are respectively connected to the output terminals of the fourth power divider. The output terminals of the ninth amplifier and the tenth amplifier are also respectively connected to a fifth filter and a sixth filter.
[0025] In some embodiments, the mixing output link includes a first mixer, a second mixer, and a third mixer, wherein the input terminal of the first mixer is connected to the output terminal of the third filter and the sixth amplifier, respectively, and the output terminal of the first mixer is connected to a fourth filter and an eighth amplifier.
[0026] In some embodiments, the input of the second mixer is connected to the output of the eighth amplifier and the fifth filter, respectively, and the output of the second mixer is connected to the eighth filter.
[0027] In some embodiments, the input of the third mixer is connected to the output of the third amplifier and the sixth filter, respectively, and the output of the third mixer is connected to a seventh filter.
[0028] The main uses and functions of this frequency synthesizer receiver with fully modulated signal output are: generating transmit excitation signals, 80MHz clock signals, and 10MHz test reference signals; generating various fully coherent signals and frequency-agile mixing local oscillator signals required by various systems; generating transmit RF signals with corresponding modulated waveforms such as linear frequency modulation pulses of different widths and point-frequency continuous waves; down-converting and amplifying the echo signals; outputting fully coherent signals; having a fault self-checking function; and being able to output at TTL level.
[0029] The frequency synthesizer receiver uses an 80MHz oven-controlled crystal oscillator as the reference signal. After amplification by the first amplifier, it is split into four signals by the first power divider. The first divided signal is further split into two signals by the second power divider. One signal is divided by 8, amplified by the second amplifier, and then output as a 10MHz test reference signal via the first filter. The other signal is amplified by the third amplifier and then output as an 80MHz test reference signal via the second filter. The second 80MHz signal output from the first power divider is output as a 640MHz signal by the phase-locked loop (PLL1) circuit, amplified by the fourth amplifier, and then output as a sweep signal by the DDS circuit. It is then output as signal 1 via the third filter. The third 80MHz signal output from the first power divider is output as an 800MHz signal by the PLL2 circuit, amplified by the fifth amplifier, and then output via the third power divider. Two signals are generated. One signal is amplified by the sixth amplifier and output as signal 2. This signal is then mixed with signal 1 and the first mixer circuit to output an 860MHz signal. After being filtered by the fourth filter, it is then amplified by the eighth amplifier to output signal 3. The other signal is amplified by the seventh amplifier and output as signal 5. The fourth 80MHz signal output from the first power divider is then processed by the phase-locked loop (PLL3) circuit to output a frequency signal f. After being divided into two signals by the fourth power divider, one signal is amplified by the ninth amplifier and output as signal 4. This signal is then mixed with signal 3 by the second mixer circuit to output a 9345-9395MHz signal, which is finally output by the eighth filter. The other signal is amplified by the tenth amplifier and output as signal 6 by the sixth filter. This signal is then mixed with signal 5 by the third mixer circuit to output a 9290-9395MHz signal, which is finally output by the seventh filter.
[0030] In this application, an 80MHz temperature-controlled crystal oscillator is used as the core reference source. After multi-stage power division, frequency division and filtering, a stable 10MHz / 80MHz test reference signal is output. The frequency stability is high, providing a unified phase reference for the entire system, ensuring the synchronization of signals of each module, meeting the requirements of high-precision frequency synthesis and signal processing, and has the advantages of low phase noise, low spurious emissions, strong anti-interference ability, high integration and strong environmental adaptability.
[0031] In this application, the transmission excitation signal generation branch multiplies the 80MHz reference to 640MHz through PLL1, drives DDS to generate high-resolution sweep frequency signals (frequency step accuracy reaches sub-Hz level), supports complex modulation waveforms such as linear frequency modulation pulses and point frequency continuous waves, and meets the modulation requirements of multiple scenarios such as radar and communication.
[0032] This application uses a first mixer, a second mixer, and a third mixer to synthesize a low-to-medium frequency signal (e.g., 860MHz) with a high-frequency local oscillator signal (8490-8530MHz), and uses a bandpass filter to filter out spurious signals, outputting a pure 9290-9395MHz high-frequency modulated signal with spurious suppression better than -60dBc and excellent signal quality.
[0033] In this application, all branch signals originate from the same 80MHz reference crystal oscillator. The phase coherence is maintained by the power divider network and phase-locked loop (PLL1-3). The final output transmit excitation signal, local oscillator signal and mixer output signal have strict phase synchronization characteristics, which is suitable for scenarios that are sensitive to phase consistency, such as phase coherent radar and multi-channel communication.
[0034] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model. The above description is only a preferred embodiment of this utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of this utility model, and these improvements and modifications should also be considered within the protection scope of this utility model.
Claims
1. A frequency synthesizer receiver module with full-function output, characterized in that, include: The system includes a reference signal generation link, a transmit excitation signal generation link, a local oscillator signal generation link, and a high-frequency local oscillator link. The reference signal generation link generates a 10MHz test reference signal and an 80MHz test reference signal. The input terminals of the transmit excitation signal generation link, the local oscillator signal generation link, and the high-frequency local oscillator link are respectively connected to the reference signal generation link. The transmit excitation signal generation link generates a transmit excitation signal with modulation characteristics. The local oscillator signal generation link generates a local oscillator signal. The high-frequency local oscillator link generates the local oscillator signal required for high-frequency mixing. A mixing output link, wherein the input terminals of the mixing output link are respectively connected to the input terminals of the transmit excitation signal generation link, the local oscillator signal generation link and the high-frequency local oscillator link, and the output terminal of the mixing output link outputs a fully modulated signal of the target frequency band.
2. The frequency synthesizer receiver module with full-function output according to claim 1, characterized in that: The reference signal generation link includes a crystal oscillator, a first amplifier, a first power divider, a second power divider, an 8-fold divider, a second amplifier, and a first filter connected in sequence.
3. The frequency synthesizer receiver module with full-function output according to claim 2, characterized in that: The reference signal generation link also includes a third amplifier and a second filter connected in sequence, with the input of the third amplifier connected to the output of the second power divider.
4. The frequency synthesizer receiver module with full-function output according to claim 2, characterized in that: The transmit excitation signal generation link includes a PLL1, a fourth amplifier, a DDS, and a third filter connected in sequence. The input terminal of the PLL1 is connected to the output terminal of the first power divider.
5. The frequency synthesizer receiver module with full-function output according to claim 4, characterized in that: The local oscillator signal generation link includes a PLL2, a fifth amplifier, a third power divider, and a sixth amplifier connected in sequence. The sixth amplifier is connected in parallel with a seventh amplifier. The input terminals of the sixth amplifier and the seventh amplifier are respectively connected to the third power divider. The input terminal of the PLL2 is connected to the output terminal of the first power divider.
6. The frequency synthesizer receiver module with full-function output according to claim 5, characterized in that: The high-frequency local oscillator link includes a PLL3, a fourth power divider, and a ninth amplifier connected in sequence. The ninth amplifier is connected in parallel with a tenth amplifier. The input terminals of the ninth amplifier and the tenth amplifier are respectively connected to the output terminals of the fourth power divider. The output terminals of the ninth amplifier and the tenth amplifier are also respectively connected to a fifth filter and a sixth filter.
7. The frequency synthesizer receiver module with full-function output according to claim 6, characterized in that: The mixing output link includes a first mixer, a second mixer, and a third mixer. The input terminal of the first mixer is connected to the output terminal of the third filter and the sixth amplifier, respectively. The output terminal of the first mixer is connected to a fourth filter and an eighth amplifier.
8. The frequency synthesizer receiver module with full-function output according to claim 7, characterized in that: The input terminal of the second mixer is connected to the output terminals of the eighth amplifier and the fifth filter, respectively, and the output terminal of the second mixer is connected to the eighth filter.
9. The frequency synthesizer receiver module with full-function output according to claim 7, characterized in that: The input terminal of the third mixer is connected to the output terminals of the seventh amplifier and the sixth filter, respectively, and the output terminal of the third mixer is connected to the seventh filter.