Small low-phase noise frequency source module
By designing a small, low-phase-noise frequency source module and using signal processing and frequency dividers to output multiple signals, the phase noise, size, and spurious emission problems of existing frequency source modules have been solved. This results in a low-phase-noise, compact frequency source module with good isolation and low phase noise performance.
Patent Information
- Application Number
- CN202422639854.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-31
- Publication Date
- 2025-10-31
- Estimated Expiration
- 2034-10-31
AI Technical Summary
Existing frequency source modules suffer from poor phase noise, large size, and significant spurious emissions.
A small, low-phase-noise frequency source module was designed, comprising a housing and circuit sub-modules, including a signal input unit, a broadband reference output unit, a local oscillator signal conversion unit, an intermediate frequency signal conversion unit, a mixer, etc. It outputs multiple signals through signal processing and frequency dividers and has BITE detection function.
A low-phase-noise, compact frequency source module has been developed, with output signals exhibiting good isolation and low phase noise. This solves the noise, size, and spurious issues in existing technologies, and its simple structure facilitates installation and debugging.
Smart Images
Figure CN223502848U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of wireless communication technology, and in particular to a small low phase noise frequency source module. Background Technology
[0002] Frequency source modules are an essential component of modern electronic systems, widely used in numerous fields such as communications, radar, electronic countermeasures, remote control and telemetry, and instrumentation, especially in satellite navigation and communications. In wireless electronic communication systems, the frequency source module is the core component of the radio frequency transceiver system, playing a crucial role in the performance of the application system.
[0003] However, the frequency source modules used in the existing technology have problems such as poor phase noise, large size, and large spurious emissions. Utility Model Content
[0004] The purpose of this invention is to provide a small, low-phase-noise frequency source module, which aims to solve the technical problems of poor phase noise, large size, and large spurious emissions in the frequency source modules used in the prior art.
[0005] To achieve the above objectives, this utility model employs a small low phase noise frequency source module, comprising a housing and a circuit sub-module. The circuit sub-module is disposed on the housing and includes a signal input unit, a broadband reference output unit, a local oscillator signal conversion unit, an intermediate frequency signal conversion unit, a mixer, a first amplifier, a first filter, a first attenuator ATT-3dB, a frequency divider, a second filter, a second amplifier, a first coupler, a second attenuator ATT-3dB, a first power divider, two third attenuators ATT-3dB, two third amplifiers, two third filters, and two second couplers.
[0006] The broadband reference output unit, the local oscillator signal conversion unit, and the intermediate frequency signal conversion unit are all connected to the signal input unit;
[0007] The mixers are all connected to the local oscillator signal conversion unit and the intermediate frequency signal conversion unit. The first amplifier is disposed between the mixer and the first filter. The first attenuator ATT-3db is connected to the first filter. The frequency divider is connected to the first attenuator ATT-3db. The second filter is disposed between the frequency divider and the second amplifier. The second attenuator ATT-3db is connected to the second amplifier through the first coupler. The first power divider is connected to the second attenuator ATT-3db. Both third attenuators ATT-3db are connected to the first power divider. The two third amplifiers are respectively connected to their corresponding third attenuators ATT-3db. The two second couplers are respectively connected to their corresponding third amplifiers through their corresponding third filters.
[0008] The signal input unit includes a fourth amplifier, a first comb spectrum generator, and a second power divider. The fourth amplifier is connected to the input signal. The first comb spectrum generator is located between the fourth amplifier and the second power divider. The second power divider is connected to the broadband reference output unit, the local oscillator signal conversion unit, and the intermediate frequency signal conversion unit.
[0009] The broadband reference output unit includes a fourth filter, a fifth amplifier, a sixth amplifier, a fourth attenuator (ATT-3dB), a sixth filter, a third power divider, two fifth attenuators (ATT-3dB), two seventh amplifiers, two seventh filters, and two third couplers. The fourth filter is connected to the second power divider. The fifth amplifier is located between the fourth filter and the fifth filter. Each amplifier is connected to both the fifth filter and the fourth attenuator (ATT-3dB). The sixth filter is connected to the fourth attenuator (ATT-3dB). The third power divider is connected to the sixth filter. Both fifth attenuators (ATT-3dB) are connected to the third power divider. The two seventh amplifiers are each connected to their corresponding fifth attenuators (ATT-3dB). The two third couplers are each connected to their corresponding seventh amplifiers via their respective seventh filters.
[0010] The local oscillator signal conversion unit includes an eighth filter, an eighth amplifier, a ninth filter, a ninth amplifier, a sixth attenuator (ATT-3dB), a tenth amplifier, a tenth filter, a second comb spectrum generator, an eleventh filter, an eleventh amplifier, a seventh attenuator (ATT-3dB), a twelfth filter, and a twelfth amplifier. The eighth amplifier is connected to the second power divider. The eighth amplifier is positioned between the eighth filter and the ninth filter. The ninth amplifier is connected to the ninth filter. The sixth attenuator (ATT-3dB) is connected to the ninth amplifier. The tenth amplifier is connected to the sixth attenuator (ATT-3dB). The tenth filter is connected to the tenth amplifier. The second comb spectrum generator is connected to the tenth filter. The eleventh filter is connected to the second comb spectrum generator. The eleventh amplifier is connected to the eleventh filter. The seventh attenuator (ATT-3dB) is positioned between the eleventh amplifier and the twelfth filter. All twelfth amplifiers are connected to the twelfth filter and the mixer.
[0011] The intermediate frequency signal conversion unit includes a thirteenth filter, a thirteenth amplifier, a fourteenth filter, a fourteenth amplifier, a fifteenth filter, and an eighth attenuator ATT-3db. The thirteenth amplifier is connected to the second power divider through the thirteenth filter. The fourteenth filter is located between the thirteenth amplifier and the fourteenth amplifier. The fifteenth filter is connected to the fourteenth amplifier. The eighth attenuator ATT-3db is connected to both the fifteenth filter and the mixer.
[0012] The box body is provided with mounting holes and rounded corners.
[0013] This utility model discloses a small, low-phase-noise frequency source module. In practical use, the frequency source uses an external clock reference input. After passing through the second comb spectrum generator, it is divided into three paths: one path outputs a broadband reference signal through a broadband reference output unit; the second path outputs a local oscillator signal after processing by the local oscillator signal conversion unit; and the third path outputs an intermediate frequency signal after passing through the intermediate frequency signal conversion unit. Simultaneously, the second and third paths output radio frequency signals after passing through the mixer. After passing through the frequency divider and amplifying and filtering, the signals are divided into two paths to output broadband local oscillator signals. All output signals have BITE detection functionality. This approach solves the technical problems of poor phase noise, large size, and large spurious emissions in existing frequency source modules. Attached Figure Description
[0014] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0015] Figure 1 This is a schematic diagram of the structure of the small low phase noise frequency source module of this utility model.
[0016] Figure 2 This is a side view of the small low phase noise frequency source module of this utility model.
[0017] Figure 3 This is the circuit schematic diagram of the small low phase noise frequency source module of this utility model.
[0018] 101 - Box body, 102 - Mounting hole, 103 - Rounded corner structure. Detailed Implementation
[0019] The embodiments of the present invention are described in detail below. Examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, but should not be construed as limiting the present invention.
[0020] Please see Figures 1-3 ,in Figure 1 This is a structural schematic diagram of the small low phase noise frequency source module of this utility model. Figure 2 This is a side view of the small, low-phase-noise frequency source module of this utility model. Figure 3 This is the circuit schematic diagram of the small low phase noise frequency source module of this utility model.
[0021] This utility model provides a small low phase noise frequency source module, including a housing 101 and a circuit sub-module. The circuit sub-module is disposed on the housing 101 and includes a signal input unit, a broadband reference output unit, a local oscillator signal conversion unit, an intermediate frequency signal conversion unit, a mixer, a first amplifier, a first filter, a first attenuator ATT-3dB, a frequency divider, a second filter, a second amplifier, a first coupler, a second attenuator ATT-3dB, a first power divider, two third attenuators ATT-3dB, two third amplifiers, two third filters, and two second couplers.
[0022] The broadband reference output unit, the local oscillator signal conversion unit, and the intermediate frequency signal conversion unit are all connected to the signal input unit;
[0023] The mixers are all connected to the local oscillator signal conversion unit and the intermediate frequency signal conversion unit. The first amplifier is disposed between the mixer and the first filter. The first attenuator ATT-3db is connected to the first filter. The frequency divider is connected to the first attenuator ATT-3db. The second filter is disposed between the frequency divider and the second amplifier. The second attenuator ATT-3db is connected to the second amplifier through the first coupler. The first power divider is connected to the second attenuator ATT-3db. Both third attenuators ATT-3db are connected to the first power divider. The two third amplifiers are respectively connected to their corresponding third attenuators ATT-3db. The two second couplers are respectively connected to their corresponding third amplifiers through their corresponding third filters.
[0024] The signal input unit includes a fourth amplifier, a first comb spectrum generator, and a second power divider. The fourth amplifier is connected to the input signal. The first comb spectrum generator is disposed between the fourth amplifier and the second power divider. The second power divider is connected to the broadband reference output unit, the local oscillator signal conversion unit, and the intermediate frequency signal conversion unit.
[0025] The broadband reference output unit includes a fourth filter, a fifth amplifier, a sixth amplifier, a fourth attenuator ATT-3db, a sixth filter, a third power divider, two fifth attenuators ATT-3db, two seventh amplifiers, two seventh filters, and two third couplers. The fourth filter is connected to the second power divider. The fifth amplifier is located between the fourth filter and the fifth filter. Each amplifier is connected to both the fifth filter and the fourth attenuator ATT-3db. The sixth filter is connected to the fourth attenuator ATT-3db. The third power divider is connected to the sixth filter. Both fifth attenuators ATT-3db are connected to the third power divider. The two seventh amplifiers are each connected to their corresponding fifth attenuators ATT-3db. The two third couplers are each connected to their corresponding seventh amplifiers via their respective seventh filters.
[0026] The local oscillator signal conversion unit includes an eighth filter, an eighth amplifier, a ninth filter, a ninth amplifier, a sixth attenuator ATT-3db, a tenth amplifier, a tenth filter, a second comb spectrum generator, an eleventh filter, an eleventh amplifier, a seventh attenuator ATT-3db, a twelfth filter, and a twelfth amplifier. The eighth amplifier is connected to the second power divider. The eighth amplifier is positioned between the eighth filter and the ninth filter. The ninth amplifier is connected to the ninth filter. The sixth attenuator ATT-3db is connected to the ninth amplifier. The tenth amplifier is connected to the sixth attenuator ATT-3db. The tenth filter is connected to the tenth amplifier. The second comb spectrum generator is connected to the tenth filter. The eleventh filter is connected to the second comb spectrum generator. The eleventh amplifier is connected to the eleventh filter. The seventh attenuator ATT-3db is positioned between the eleventh amplifier and the twelfth filter. All twelfth amplifiers are connected to the twelfth filter and the mixer.
[0027] The intermediate frequency signal conversion unit includes a thirteenth filter, a thirteenth amplifier, a fourteenth filter, a fourteenth amplifier, a fifteenth filter, and an eighth attenuator ATT-3db. The thirteenth amplifier is connected to the second power divider through the thirteenth filter. The fourteenth filter is located between the thirteenth amplifier and the fourteenth amplifier. The fifteenth filter is connected to the fourteenth amplifier. The eighth attenuator ATT-3db is connected to both the fifteenth filter and the mixer.
[0028] In this specific implementation, the frequency source uses an external clock reference input. After passing through the second comb spectrum generator, it is divided into three paths: one path outputs a broadband reference signal through a broadband reference output unit; the second path outputs a local oscillator signal after processing by the local oscillator signal conversion unit; and the third path outputs an intermediate frequency signal after passing through the intermediate frequency signal conversion unit. Simultaneously, the second and third paths output radio frequency signals after passing through the mixer. After passing through the frequency divider and amplifying and filtering, the signals are divided into two paths to output broadband local oscillator signals. All output signals have BITE detection functionality. This approach solves the technical problems of poor phase noise, large size, and large spurious emissions in the frequency source modules used in the prior art.
[0029] The external reference clock is 120MHz input, and after passing through the second comb spectrum, it outputs a 1080MHz intermediate frequency signal, a 1320MHz signal, and a 960MHz broadband local oscillator signal, respectively. The local oscillator signal is a 1320MHz signal that is first amplified and then passed through the first comb spectrum to output a 13.2GHz local oscillator signal.
[0030] The 13.2GHz local oscillator signal and the 1080MHz intermediate frequency signal are mixed and then output as a 14.28GHz radio frequency signal.
[0031] The broadband local oscillator signal is a 14.28 GHz radio frequency signal that is output as a 3.72 GHz broadband local oscillator signal after passing through the frequency divider.
[0032] The module has high isolation between its two outputs, with a phase noise of ≤-125dBc / Hz for the broadband reference signal output and ≤-115dBc / Hz for the broadband local oscillator signal output.
[0033] The broadband reference signal has an output power of 3 ± 1 dB at all temperatures, a phase noise of ≤ -125 dBc / Hz (at 1 kHz), an output port spurious noise of ≤ -70 dBc, and an isolation of greater than 35 dB.
[0034] The broadband reference signal has an output power of 12 ± 1 dB at all temperatures, a phase noise of ≤ -115 dBc / Hz (at 1 kHz), an output port spurious noise of ≤ -70 dBc, and an isolation of greater than 35 dB.
[0035] The box body 101 is provided with mounting holes 102 and rounded corner structure 103.
[0036] In this specific embodiment, the installation is made more convenient by providing the mounting hole 102.
[0037] The present invention discloses a small, low-phase-noise frequency source module. In practical use, the frequency source uses an external clock reference input. After passing through the second comb spectrum generator, the signal is divided into three paths: one path outputs a broadband reference signal through a broadband reference output unit; the second path outputs a local oscillator signal after processing by the local oscillator signal conversion unit; and the third path outputs an intermediate frequency signal after passing through the intermediate frequency signal conversion unit. Simultaneously, the second and third paths output radio frequency signals after passing through the mixer. After passing through the frequency divider and amplification and filtering, the signal is divided into two paths to output broadband local oscillator signals. All output signals have BITE detection functionality. This approach solves the technical problems of poor phase noise, large size, and large spurious emissions in existing frequency source modules. The present invention provides stable output power with a power variation of ±1dB across the entire temperature range. The output is virtually free of spurious emissions, has low harmonics, and a phase noise of -120dBc / Hz@1kHz at 3570MHz. The simple structure allows for convenient and quick replacement, and the low debugging difficulty is beneficial for design and production.
[0038] The above-disclosed embodiments are merely preferred embodiments of the present utility model and should not be construed as limiting the scope of the present utility model. Those skilled in the art can understand that implementing all or part of the above-described embodiments and making equivalent changes in accordance with the claims of the present utility model are still within the scope of the utility model.
Claims
1. A small, low-phase-noise frequency source module, characterized in that, The device includes a housing and circuit sub-modules. The circuit sub-modules are mounted on the housing and include a signal input unit, a broadband reference output unit, a local oscillator signal conversion unit, an intermediate frequency signal conversion unit, a mixer, a first amplifier, a first filter, a first attenuator ATT-3dB, a frequency divider, a second filter, a second amplifier, a first coupler, a second attenuator ATT-3dB, a first power divider, two third attenuators ATT-3dB, two third amplifiers, two third filters, and two second couplers. The broadband reference output unit, the local oscillator signal conversion unit, and the intermediate frequency signal conversion unit are all connected to the signal input unit; The mixers are all connected to the local oscillator signal conversion unit and the intermediate frequency signal conversion unit. The first amplifier is disposed between the mixer and the first filter. The first attenuator ATT-3db is connected to the first filter. The frequency divider is connected to the first attenuator ATT-3db. The second filter is disposed between the frequency divider and the second amplifier. The second attenuator ATT-3db is connected to the second amplifier through the first coupler. The first power divider is connected to the second attenuator ATT-3db. Both third attenuators ATT-3db are connected to the first power divider. The two third amplifiers are respectively connected to their corresponding third attenuators ATT-3db. The two second couplers are respectively connected to their corresponding third amplifiers through their corresponding third filters.
2. The small low phase noise frequency source module as described in claim 1, characterized in that, The signal input unit includes a fourth amplifier, a first comb spectrum generator, and a second power divider. The fourth amplifier is connected to the input signal. The first comb spectrum generator is disposed between the fourth amplifier and the second power divider. The second power divider is connected to the broadband reference output unit, the local oscillator signal conversion unit, and the intermediate frequency signal conversion unit.
3. The small low phase noise frequency source module as described in claim 2, characterized in that, The broadband reference output unit includes a fourth filter, a fifth amplifier, a sixth amplifier, a fourth attenuator ATT-3db, a sixth filter, a third power divider, two fifth attenuators ATT-3db, two seventh amplifiers, two seventh filters, and two third couplers. The fourth filter is connected to the second power divider. The fifth amplifier is located between the fourth filter and the fifth filter. Each amplifier is connected to both the fifth filter and the fourth attenuator ATT-3db. The sixth filter is connected to the fourth attenuator ATT-3db. The third power divider is connected to the sixth filter. Both fifth attenuators ATT-3db are connected to the third power divider. The two seventh amplifiers are each connected to their corresponding fifth attenuators ATT-3db. The two third couplers are each connected to their corresponding seventh amplifiers via their respective seventh filters.
4. The small low phase noise frequency source module as described in claim 3, characterized in that, The local oscillator signal conversion unit includes an eighth filter, an eighth amplifier, a ninth filter, a ninth amplifier, a sixth attenuator ATT-3db, a tenth amplifier, a tenth filter, a second comb spectrum generator, an eleventh filter, an eleventh amplifier, a seventh attenuator ATT-3db, a twelfth filter, and a twelfth amplifier. The eighth amplifier is connected to the second power divider. The eighth amplifier is positioned between the eighth filter and the ninth filter. The ninth amplifier is connected to the ninth filter. The sixth attenuator ATT-3db is connected to the ninth amplifier. The tenth amplifier is connected to the sixth attenuator ATT-3db. The tenth filter is connected to the tenth amplifier. The second comb spectrum generator is connected to the tenth filter. The eleventh filter is connected to the second comb spectrum generator. The eleventh amplifier is connected to the eleventh filter. The seventh attenuator ATT-3db is positioned between the eleventh amplifier and the twelfth filter. All twelfth amplifiers are connected to the twelfth filter and the mixer.
5. The small low phase noise frequency source module as described in claim 4, characterized in that, The intermediate frequency signal conversion unit includes a thirteenth filter, a thirteenth amplifier, a fourteenth filter, a fourteenth amplifier, a fifteenth filter, and an eighth attenuator ATT-3db. The thirteenth amplifier is connected to the second power divider through the thirteenth filter. The fourteenth filter is located between the thirteenth amplifier and the fourteenth amplifier. The fifteenth filter is connected to the fourteenth amplifier. The eighth attenuator ATT-3db is connected to both the fifteenth filter and the mixer.
6. The small low phase noise frequency source module as described in claim 5, characterized in that, The box body is provided with mounting holes and rounded corners.