Frequency multiplier module with phase noise deterioration value calibration function
By designing a frequency multiplier module with phase noise degradation calibration, the problem of high cost of high-precision phase noise testing equipment was solved. This enabled the improvement of phase noise measurement accuracy and the guarantee of link performance in scenarios where high-precision measuring instruments are not available, thereby reducing equipment costs.
Patent Information
- Application Number
- CN202423292822.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-31
- Publication Date
- 2025-12-09
- Estimated Expiration
- 2034-12-31
AI Technical Summary
In existing technologies for high-precision clock source applications, the requirement for high-precision phase noise testing results in expensive testing equipment, and it is difficult to achieve phase noise measurement below -150dBc/Hz in scenarios where high-precision measuring instruments are not available.
Design a frequency multiplier module with phase noise degradation calibration. By connecting attenuators and filters at the signal input and output terminals and adding an intermediate drive module, the phase noise degradation value of each calibration channel is measured to obtain calibration parameters, improving the phase noise measurement accuracy to above -120dBc/Hz, and achieving a high level of accuracy after compensation calibration.
In scenarios where high-precision measuring instruments are unavailable, this module improves the accuracy of phase noise measurement, reduces equipment costs, ensures normal link performance, minimizes the impact of nonlinearity, and is suitable for frequency multipliers with multiple input and output frequencies.
Smart Images
Figure CN223652230U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of frequency multiplier technology, specifically a frequency multiplier module with phase noise degradation value calibration. Background Technology
[0002] With the rapid development of technology in various industries in my country, especially in the aerospace and military industries, the application scenarios of high-precision clock sources are increasing, such as high-precision satellite ranging and velocity measurement, and disciplined clocks. The demand for testing high-precision signal phase noise is also increasing. However, when the actual amplitude reaches below -150dBc / Hz, higher requirements are often placed on the testing equipment, such as the need to purchase a high-precision phase noise tester or a spectrum analyzer with high dynamic range and high-precision phase noise measurement parameters. These instruments are often very expensive. Utility Model Content
[0003] The purpose of this invention is to provide a frequency multiplier module with phase noise degradation value calibration, which effectively solves the problems mentioned in the background art.
[0004] To achieve the above objectives, the present invention provides the following technical solution.
[0005] A frequency multiplier module with phase noise degradation value calibration is disclosed. The frequency multiplier module includes a first attenuator, a first filter, a second attenuator, a second filter, and an intermediate drive module. The signal input terminal of the frequency multiplier module is electrically connected to the first attenuator and the first filter, and the output terminal of the first attenuator is electrically connected to the input terminal of the first filter. The output terminal of the frequency multiplier module is electrically connected to the second attenuator and the second filter, and the output terminal of the second attenuator is electrically connected to the input terminal of the second filter. At least two sets of intermediate drive modules are electrically connected between the first filter and the second attenuator.
[0006] Preferably, the intermediate driving modules can be repeatedly stacked and connected, and adjacent intermediate driving modules are electrically connected by a third attenuator, a third filter, and a three-way RF switch A.
[0007] Preferably, the intermediate driving module includes an amplifier, a fourth attenuator, a fourth filter, a three-way RF switch B, and a passive frequency multiplier. The output of the first filter is electrically connected to the input of the amplifier, the output of the amplifier is electrically connected to the input of the fourth attenuator, and the output of the fourth attenuator is electrically connected to the input of the passive frequency multiplier through the three-way RF switch B.
[0008] Preferably, the amplifier is used for signal amplification and driving a passive frequency multiplier.
[0009] Preferably, the passive frequency multiplier is used to realize the radio frequency of the signal.
[0010] Preferably, both the three-way RF switch A and the three-way RF switch B are used to switch the input or output direction of the RF signal.
[0011] Preferably, the amplifier operates in the frequency band of 1MHz to 1000MHz.
[0012] Compared with the prior art, the beneficial effects of this utility model are as follows.
[0013] This invention features a frequency multiplier module with a first attenuator and a first filter electrically connected to its signal input. The output of the first attenuator is electrically connected to the input of the first filter. A second attenuator and a second filter are electrically connected to the output of the frequency multiplier module, with the output of the second attenuator electrically connected to the input of the second filter. At least two intermediate drive modules are electrically connected between the first filter and the second attenuator. By measuring the phase noise degradation values of each calibration channel and the final output, and obtaining calibration parameters, the frequency multiplier module can be applied to scenarios lacking high-precision measuring instruments. The frequency multiplier module can improve the phase noise value that needs to be directly measured to above -120dBc / Hz, reaching a noise floor that can be measured by common spectrum analyzers. Simultaneously, its accuracy after compensation calibration is also at a high level. The entire frequency multiplier module has a low cost and high cost-effectiveness. The multiple calibration channels ensure that each stage of the link operates normally, minimizing the introduction of nonlinear effects, ensuring normal link performance, and allowing for calibration at any time. The application scenarios of this utility model are not limited to phase noise testing and compensation. It is also a high-performance frequency multiplier module that covers multiple input and output frequency points with selectable multiplier. Attached Figure Description
[0014] Figure 1 This is a schematic diagram of the principle of this utility model. Detailed Implementation
[0015] 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.
[0016] In the description of the embodiments of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "connection" and "installation" should be interpreted broadly. For example, "connection" can be a detachable connection or a non-detachable connection; it can be a direct connection or an indirect connection through an intermediate medium. Furthermore, "connection" can be a direct connection or an indirect connection through an intermediate medium. "Fixed" means that the relative positional relationship remains unchanged after the connection. The directional terms mentioned in the embodiments of this utility model, such as "inner," "outer," "top," and "bottom," are only for reference to the directions in the accompanying drawings. Therefore, the directional terms used are for better and clearer explanation and understanding of the embodiments of this utility model, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this utility model.
[0017] In this embodiment of the invention, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined with "first" and "second" may explicitly or implicitly include one or more of that feature.
[0018] The frequency multiplier module includes a first attenuator, a first filter, a second attenuator, a second filter, and an intermediate drive module. The signal input terminal of the frequency multiplier module is electrically connected to the first attenuator and the first filter, and the output terminal of the first attenuator is electrically connected to the input terminal of the first filter. The output terminal of the frequency multiplier module is electrically connected to the second attenuator and the second filter, and the output terminal of the second attenuator is electrically connected to the input terminal of the second filter. At least two sets of intermediate drive modules are electrically connected between the first filter and the second attenuator. This invention obtains calibration parameters by measuring the phase noise degradation values of each calibration channel and the final output. The frequency multiplier module can then be applied to scenarios lacking high-precision measuring instruments. It increases the final directly measurable phase noise value to above -120dBc / Hz, reaching a noise floor level that common spectrum analyzers can measure, while also achieving a high level of accuracy after compensation calibration. The multiple calibration channels ensure that each stage of the link operates normally, minimizing the introduction of nonlinear effects, guaranteeing normal link performance, and allowing for calibration at any time.
[0019] Intermediate drive modules can be repeatedly stacked and connected. In the attached figure of this embodiment, two sets of intermediate drive modules are used as an example. The adjacent intermediate drive modules are electrically connected by a third attenuator, a third filter and a three-way RF switch A.
[0020] The intermediate drive module includes an amplifier, a fourth attenuator, a fourth filter, a three-way RF switch B, and a passive frequency multiplier. The output of the first filter is electrically connected to the input of the amplifier, the output of the amplifier is electrically connected to the input of the fourth attenuator, and the output of the fourth attenuator is electrically connected to the input of the passive frequency multiplier through the three-way RF switch B.
[0021] The amplifier is used to amplify the signal and drive the passive frequency multiplier. The passive frequency multiplier is used to implement the radio frequency of the signal. The first attenuator, first filter, second attenuator, second filter, third attenuator, third filter, fourth attenuator, and fourth filter are all used to adjust the interstage attenuation and filter out unwanted signals, so that the amplifier and frequency multiplier operate in their optimal performance range.
[0022] Both the three-way RF switch A and the three-way RF switch B are used to switch the input or output direction of RF signals. Any two can be connected in any of the three directions at this position to achieve multiple selectable inputs, multiple selectable outputs, and selectable frequency multiplication factors in the link, while making the entire frequency multiplier module's link cover as many input and output frequencies as possible.
[0023] The amplifier in this embodiment operates in the frequency band of 1MHz to 1000MHz, with an output power of P1out = 28dBm. It can adapt to frequencies before and after multiplication of common clock frequencies such as 10MHz, 40MHz, and 100MHz, and exhibits excellent performance. Different input frequencies require different frequency multipliers, and it features low noise across the entire frequency band, effectively meeting all signal amplification needs of this invention.
[0024] After the signal is input, the output of the three-way RF switch B can be tested at each stage to obtain the phase noise degradation value or the theoretical phase noise degradation value after frequency doubling of each stage device. The degradation value of each stage cannot be more than 3dB more than the noise figure of the device at this stage or the theoretical degradation value after frequency doubling. Otherwise, the calibration of the device at this stage will fail and the device at this stage needs to be replaced.
[0025] The calibration method used in this embodiment is as follows: Under quiet, noise-free, vibration-free, and external RF signal interference-free conditions, a signal within the measurement range of the current measurement equipment is used as the input to the frequency multiplier module. The phase noise degradation value of the signal is measured at each calibration node of the subsequent link. Multiple measurements can be taken, and the average value of each measurement point is taken to reduce errors, thereby obtaining the phase noise degradation value of the currently used link link at the current frequency. When the phase noise of the input signal may be better than -170dBc / Hz, both measurement and calibration should ensure that the input and output power of the earlier devices in the link is >0dBm to reduce the impact of power supply and other onboard noise on calibration and measurement.
[0026] The theoretical value of phase noise degradation calculated solely from the perspective of frequency doubling is: theoretical degradation of phase noise after frequency doubling = 20lg(frequency doubling factor).
[0027] The application scenarios of this utility model are not limited to phase noise testing and compensation. It is also a high-performance frequency multiplier module that covers multiple input and output frequency points with selectable multiplier.
[0028] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention.
Claims
1. A frequency multiplier module with phase noise degradation value calibration, characterized in that: The frequency multiplier module includes a first attenuator, a first filter, a second attenuator, a second filter, and an intermediate drive module. The signal input terminal of the frequency multiplier module is electrically connected to the first attenuator and the first filter, and the output terminal of the first attenuator is electrically connected to the input terminal of the first filter. The output terminal of the frequency multiplier module is electrically connected to the second attenuator and the second filter, and the output terminal of the second attenuator is electrically connected to the input terminal of the second filter. At least two sets of intermediate drive modules are electrically connected between the first filter and the second attenuator.
2. A frequency multiplier module with phase noise degradation value calibration according to claim 1, characterized in that: The intermediate drive modules can be repeatedly stacked and connected, and adjacent intermediate drive modules are electrically connected by a third attenuator, a third filter, and a three-way RF switch A.
3. A frequency multiplier module with phase noise degradation value calibration according to claim 2, characterized in that: The intermediate drive module includes an amplifier, a fourth attenuator, a fourth filter, a three-way RF switch B, and a passive frequency multiplier. The output of the first filter is electrically connected to the input of the amplifier. The output of the amplifier is electrically connected to the input of the fourth attenuator. The output of the fourth attenuator is electrically connected to the input of the passive frequency multiplier through the three-way RF switch B.
4. A frequency multiplier module with phase noise degradation value calibration according to claim 3, characterized in that: The amplifier is used for signal amplification and driving a passive frequency multiplier.
5. A frequency multiplier module with phase noise degradation value calibration according to claim 3, characterized in that: The passive frequency multiplier is used to realize the radio frequency of the signal.
6. A frequency multiplier module with phase noise degradation value calibration according to claim 4 or 5, characterized in that: Both the three-way RF switch A and the three-way RF switch B are used to switch the input or output direction of RF signals.
7. A frequency multiplier module with phase noise degradation value calibration according to claim 6, characterized in that: The amplifier operates in the frequency band of 1MHz to 1000MHz.