Millimeter wave ultra-wideband frequency hopping frequency synthesizer module
By combining a comb spectrum frequency multiplication circuit, an ultra-low phase noise dot matrix synthesis circuit, and an ultra-wideband frequency shift phase-locked loop circuit, the problem of frequency source products balancing ultra-wideband coverage, high-speed frequency hopping, and low phase noise and low spurious emissions is solved, achieving high-performance frequency synthesis.
Patent Information
- Application Number
- CN202520271341.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-20
- Publication Date
- 2026-02-27
- Estimated Expiration
- 2035-02-20
AI Technical Summary
Existing frequency source products struggle to achieve the performance targets of ultra-wideband coverage, high-speed frequency hopping, and low phase noise and low spurious emissions, which limits the performance of transceiver systems in electronic countermeasures and reconnaissance systems.
By employing a comb-spectrum frequency doubling circuit, an ultra-low phase noise dot matrix synthesis circuit, an ultra-wideband frequency shift phase-locked loop circuit, and a wideband millimeter-wave frequency doubling synthesis circuit, frequency synthesis is achieved through comb-spectrum frequency doubling technology, dot matrix frequency selection technology, and frequency shift phase-locked loop technology, thereby realizing extremely low phase noise, ultra-wide frequency coverage, and high-speed frequency hopping.
It achieves frequency synthesis effects with extremely low phase noise, ultra-wide frequency coverage, high-speed frequency hopping, and ultra-low spurious emissions, meeting the needs of electronic countermeasures and reconnaissance systems.
Smart Images
Figure CN223957547U_ABST
Abstract
Description
Technical Field
[0001] This application belongs to the field of transceiver circuit technology, specifically a millimeter-wave ultra-wideband frequency hopping synthesizer module. Background Technology
[0002] As a key component of a transceiver system, the performance of the frequency synthesizer directly affects the overall system performance. For example, certain parameters of the frequency source directly impact transceiver performance; phase noise and spurious signals are key parameters determining the system's ability to resolve small signals. Another crucial parameter affecting overall system performance is frequency switching speed, as data processing cannot occur during frequency switching. Shorter switching times provide more processing time for the system. Furthermore, high-speed frequency hopping offers excellent anti-jamming characteristics, preventing the adversary from effectively jamming due to their inability to keep up with the hopping rhythm. Currently, electronic countermeasures and reconnaissance systems typically require ultra-wideband transceiver and detection capabilities, as well as rapid response capabilities. Therefore, the local oscillator in a transceiver system must also possess ultra-wideband frequency coverage.
[0003] However, common frequency source products often have conflicting performance indicators such as ultra-wideband output frequency coverage, high-speed frequency hopping, ultra-low phase noise, and low spurious emissions, and cannot achieve all of them simultaneously. Utility Model Content
[0004] The purpose of this application is to provide a millimeter-wave ultra-wideband frequency hopping synthesizer module in order to solve the problems mentioned above.
[0005] The technical solution adopted in this application is as follows: a millimeter-wave ultra-wideband frequency hopping synthesizer module, comprising a comb-spectrum frequency doubling circuit, an ultra-low phase noise dot matrix synthesis circuit, an ultra-wideband frequency shift phase-locked loop circuit, and a wideband millimeter-wave frequency doubling synthesis circuit:
[0006] The comb spectrum frequency multiplier circuit first multiplies the input reference signal to generate a series of harmonics, and then selects four fundamental frequency points through a pre-selection and switching filter network: 2600MHz, 2900MHz, 3200MHz, and 3400MHz. These four fundamental frequency signals are multiplied by a quadrupler and then filtered again to finally obtain four low phase noise point frequency signals: 10400MHz, 11600MHz, 12800MHz, and 13600MHz.
[0007] The ultra-low phase noise dot matrix synthesis circuit achieves high-speed switching at the nanosecond level through switch selection;
[0008] The ultra-wideband frequency shift phase-locked circuit uses a mixing and shifting method to reduce the operating frequency of the ultra-wideband frequency shift phase-locked circuit.
[0009] The wideband millimeter wave frequency multiplication synthesis circuit expands the output frequency range to 8GHz-32GHz through 2 times frequency multiplication and segmented switch filtering; finally, a wideband amplitude equalizer is used to perform amplitude equalization and gain compensation on the entire frequency band.
[0010] In a preferred embodiment, the ultra-low phase noise dot array synthesis circuit uses the four dot frequency signals as auxiliary signals, and performs segmented frequency mixing with the wideband signals of 8GHz-16GHz to move the ultra-wideband frequency signals to the intermediate frequency range of 1000-2400MHz for phase locking.
[0011] In a preferred embodiment, the wideband millimeter wave frequency multiplication synthesis circuit synthesizes the ultra-wideband frequency signals of 8GHz-16GHz, then performs 2 times frequency multiplication and four times segmented switch filtering, i.e., 8-16GHz, 16-21GHz, 21-28GHz and 28-36GHz; the final circuit uses wideband frequency multiplication and switch filtering to greatly expand the frequency bandwidth of the synthesized signals, and finally obtains the full-band signals of 8GHz-32GHz; since the output frequency band is very wide, a wideband amplitude equalizer is used to perform amplitude equalization and gain compensation on the entire frequency band to ensure that the amplitude fluctuation of the full-band output is small.
[0012] In a preferred embodiment, the ultra-wideband frequency shift phase locking circuit module performs segmented frequency mixing of the four dot frequency signals with the wideband signals of 8GHz-16GHz, and always obtains the intermediate frequency signals with a frequency range of 1000-2400MHz.
[0013] In summary, due to the adoption of the above technical solutions, the application has the following advantages:
[0014] 1. In the application, the frequency synthesis is performed by using the comb spectrum frequency multiplication technology, dot array frequency selection technology and frequency shift phase locking technology, so that the product has excellent characteristics such as extremely low phase noise, ultra-wide frequency coverage, high frequency hopping speed and ultra-low spurious.
[0015] 2. In the application, the comb spectrum frequency multiplication and ultra-low phase noise dot array synthesis technology are used without introducing other phase noise deterioration, so that the dot frequency array participating in the auxiliary phase locking has extremely low phase noise. Therefore, the dot frequency array can realize the frequency shift and frequency reduction of the ultra-wideband frequency signals without introducing additional phase noise deterioration.
[0016] 3. In the application, the dots of the dot frequency array are staggered and separated by a large frequency range, and multiple dots are continuously connected to form a large frequency coverage. Each dot frequency is selected by a switch and is shifted by frequency mixing to realize phase locking frequency synthesis in a very wide bandwidth. The auxiliary frequency shift phase locking by the dot frequency array can realize the frequency conversion of the ultra-wideband frequency signals to a lower intermediate frequency for phase locking, greatly reduces the frequency multiplication coefficient, and has less phase noise deterioration, so that the frequency synthesis can obtain very excellent phase noise.
[0017] 4. In the application, the generated point frequency array has very high switching speed, and the switching frequency time is tens of nanoseconds. The frequency switching time can be almost ignored relative to the microsecond-level phase-locked time. Therefore, when the point frequency array is used to realize a large range of frequency hopping, it will not cause an increase in additional phase-locked time. The ultra-wideband frequency-shift phase-locked loop can be approximated as a single narrowband phase-locked loop, a higher frequency discrimination frequency can be taken, and thus a faster frequency hopping speed can be obtained.
[0018] 5. In the application, after the ultra-wideband phase-locked frequency synthesis, the output signal adopts a wideband millimeter wave frequency multiplication synthesis and equalization technology, which further expands the output frequency range to the millimeter wave frequency band. At the same time, through segmented switching filtering and amplitude equalization, the amplitude fluctuation of the full-band output signal is small, and the spurious is low. Thus, a high-quality millimeter wave frequency signal with ultra-low phase noise, ultra-wideband coverage, high-speed frequency hopping, and low spurious is finally obtained. BRIEF DESCRIPTION OF DRAWINGS
[0019] Figure 1 It is a miniature millimeter wave ultra-wideband high-speed frequency hopping frequency synthesis principle diagram of the application;
[0020] Figure 2 It is a comb spectrum frequency multiplication and ultra-low phase noise point array synthesis circuit schematic diagram in the application;
[0021] Figure 3 It is an ultra-wideband frequency-shift phase-locked synthesis circuit schematic diagram in the application;
[0022] Figure 4 It is a point frequency, feedback frequency, and synthesis frequency corresponding relationship schematic diagram in the application;
[0023] Figure 5 It is a wideband millimeter wave frequency multiplication synthesis circuit schematic diagram in the application. DETAILED DESCRIPTION
[0024] To make the purpose, technical scheme and advantages of the embodiments of the application clearer, the technical scheme in the embodiments of the application will be described below in a clear and complete manner in combination with the embodiments of the application. Obviously, the described embodiments are some of the embodiments of the application, rather than all the embodiments of the application. Based on the embodiments in the application, all other embodiments obtained by those of ordinary skill in the art without creative labor fall within the scope of protection of the application.
[0025] Embodiment:
[0026] Reference Figures 1-5 A millimeter wave ultra-wideband frequency hopping frequency synthesis module includes a comb spectrum frequency multiplication and ultra-low phase noise point array synthesis circuit, an ultra-wideband frequency-shift phase-locked circuit, and a wideband millimeter wave frequency multiplication synthesis circuit.
[0027] Advanced comb spectrum frequency multiplication and ultra-low phase noise array synthesis technology, ultra-wideband frequency shift phase-locked loop technology, and wideband millimeter wave frequency multiplication synthesis technology are adopted. The specific implementation principle is as follows: first, the input reference signal is multiplied by a comb spectrum to generate a series of harmonic waves of reference frequencies. Then, the signal is pre-selected and the unwanted harmonics are removed. Next, through a high-speed switch filter network, fine filtering is performed to filter out the four required base frequency points, with frequencies of 2600MHz, 2900MHz, 3200MHz, and 3400MHz.
[0028] The four base frequency signals are multiplied by a frequency multiplier and filtered by a switch to finally obtain the four required point frequency signals with frequencies of 10400MHz, 11600MHz, 12800MHz, and 13600MHz. The comb spectrum frequency multiplication technology is used to directly generate the output signal by frequency multiplication. The phase noise is only deteriorated by the frequency multiplication coefficient, without introducing other phase noise deterioration factors, so the four point frequencies have extremely low phase noise.
[0029] The four point frequency signals have very high switching speed through switch gating, reaching the ns level. Therefore, in the full-band frequency hopping process, the point array switching time can be basically ignored, and the locking time of the entire phase-locked loop is very small. At the same time, the four point frequency signals generated enter the frequency shift phase-locked loop, and the ultra-wideband frequency signal is moved to a lower fixed frequency range through a mixer for phase locking. Therefore, the assistance of the point frequency array enables the entire phase-locked loop to achieve ultra-wideband frequency coverage while having a very high frequency hopping speed.
[0030] The mixer moving method greatly reduces the operating frequency of the phase-locked loop, reduces the phase-locked frequency multiplication coefficient, and thus achieves the purpose of reducing the phase noise. The four point frequencies have extremely low phase noise, and their participation in the mixer phase-locked loop does not cause the phase noise in the loop to deteriorate. The phase noise of the phase-locked loop is mainly determined by the lower intermediate frequency signal after mixing. The four point frequency signals are mixed with the 8GHz-16GHz wideband signal in segments, and always obtain an intermediate frequency signal with a frequency range of 1000-2400MHz. In fact, it is to convert the 8GHz-16GHz wideband high frequency signal to a lower intermediate frequency of 1000-2400MHz for frequency and phase discrimination. The phase-locked loop uses a 50MHz high discriminator frequency for frequency synthesis, further reducing the frequency division ratio and the phase noise deterioration. As shown in Figure 4 , therefore, after ultra-wideband frequency shift phase-locked frequency synthesis, very excellent phase noise can be finally achieved.
[0031] The synthesized ultra-wideband frequency 8GHz-16GHz signal is doubled, and then filtered by four switches, which are 8-16GHz, 16-21GHz, 21-28GHz and 28-36GHz respectively. The last stage circuit adopts wideband frequency doubling and switch filtering circuit synthesis, which greatly expands the synthesized frequency bandwidth, and finally obtains an 8GHz-32GHz full-band signal. Because the output frequency range is very wide, in order to ensure that the output amplitude fluctuation of the full-band is small, a wideband amplitude equalizer is used to perform amplitude equalization and gain compensation on the entire frequency band.
[0032] The millimeter wave ultra-wideband frequency hopping synthesizer module of the present application can achieve the following indicators.
[0033] ①Output frequency range: 8-32GHz;
[0034] ②Outline size: ≤50×50×10mm3;
[0035] ③Phase noise: ≤-110dBc / Hz@10KHz (18GHz);
[0036] ④Step: ≤100MHz;
[0037] ⑤Frequency hopping time: ≤30us;
[0038] ⑥Spurious suppression: ≤-70dBc.
[0039] From the above, it can be seen that:
[0040] In the present application, by adopting comb spectrum frequency doubling technology, dot array frequency selection technology and frequency shift phase-locked loop technology for frequency synthesis, the product has excellent characteristics such as extremely low phase noise, ultra-wide frequency coverage, high frequency hopping speed and ultra-low spurious.
[0041] In the present application, comb spectrum frequency doubling and ultra-low phase noise dot array synthesis technology are adopted, without introducing other phase noise deterioration, so that the dot frequency array participating in auxiliary phase-locked loop has extremely low phase noise. Therefore, the dot frequency array realizes frequency shift and frequency reduction of the ultra-wideband frequency signal without introducing additional phase noise deterioration.
[0042] In the present application, the dot frequency array is staggered with each other, separated by a large frequency range, and multiple points are continuously connected to form a large frequency coverage. Each dot frequency is selected by a switch and is frequency-shifted by mixing to realize phase-locked frequency synthesis in a very wide bandwidth range. By auxiliary frequency shift phase-locked loop of the dot frequency array, the ultra-wideband frequency signal is frequency converted to a lower intermediate frequency for phase-locked loop, greatly reducing the frequency doubling coefficient and the phase noise deterioration, so that the frequency synthesis can obtain very excellent phase noise.
[0043] In the application, the generated point frequency array has very high switching speed, and the switching frequency time is tens of nanoseconds, which can be almost ignored compared with the microsecond level phase-locked time. Therefore, when the point frequency array realizes large range frequency hopping, it will not cause the increase of additional phase-locked time, and the ultra-wideband frequency shift phase-locked loop can be almost approximated to a single narrowband phase-locked loop, a higher phase detection frequency can be taken, and thus a faster frequency hopping speed can be obtained.
[0044] In the application, after the ultra-wideband phase-locked frequency synthesis, the output signal adopts wideband millimeter wave frequency doubling synthesis and equalization technology, further expands the output frequency range, and reaches the millimeter wave frequency band. At the same time, through the segmented switch filtering and amplitude equalization, the amplitude fluctuation of the full-band output signal is small, and the spurious is low. Thus, finally, the high-quality millimeter wave frequency signal with ultra-low phase noise, ultra-wideband coverage, high-speed frequency hopping and low spurious is obtained.
[0045] The above embodiments are only used to illustrate the technical solutions of the application, rather than limit them; although the application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that the technical solutions recorded in the foregoing embodiments can be modified, or some technical features can be replaced by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the application.
Claims
1. A millimeter wave ultra-wideband frequency hopping frequency synthesizer module, characterized by: The circuit comprises a comb spectrum frequency multiplication circuit, an ultra-low phase noise point array synthesizing circuit, an ultra-wideband frequency shift phase-locked loop circuit, and a wideband millimeter wave frequency multiplication synthesizing circuit. The comb spectrum frequency multiplication circuit first multiplies the input reference signal to generate a series of harmonics, and selects four basic frequency points, 2600 MHz, 2900 MHz, 3200 MHz and 3400 MHz, through a preselected frequency and a switch filter network; the four basic frequency signals are multiplied by a frequency quadrupler, and then pass through a switch filter to obtain four low phase noise point frequency signals, 10400 MHz, 11600 MHz, 12800 MHz and 13600 MHz. The ultra-low phase noise point array synthesizing circuit is selected by a switch. The ultra-wideband frequency shift phase-locked loop circuit reduces the working frequency of the ultra-wideband frequency shift phase-locked loop circuit by using a frequency shift mixing method. The wideband millimeter wave frequency multiplication synthesizing circuit expands the output frequency range to 8-32 GHz by 2 frequency multiplication and segmented switch filtering, and finally uses a wideband amplitude equalizer to perform amplitude equalization and gain compensation on the entire frequency band.
2. A millimeter-wave ultra-wideband frequency-hopping transceiver module as in claim 1, wherein: The ultra-low phase noise point array synthesizing circuit uses the four point frequency signals as auxiliary signals, and mixes the signals with the wideband signals in the frequency range of 8-16 GHz to move the ultra-wideband frequency signals to the intermediate frequency range of 1000-2400 MHz for phase locking.
3. A millimeter-wave ultra-wideband frequency-hopping transceiver module as in claim 1, wherein: The wideband millimeter wave frequency multiplication synthesizing circuit synthesizes the ultra-wideband frequency signals in the frequency range of 8-16 GHz, and then performs 2 frequency multiplication and four segmented switch filtering, i.e., 8-16 GHz, 16-21 GHz, 21-28 GHz and 28-36 GHz; the last stage circuit uses a wideband frequency multiplication and switch filtering circuit to greatly expand the frequency bandwidth of the synthesized signals, and finally obtains the full-band signals in the frequency range of 8-32 GHz.
4. A millimeter-wave ultra-wideband frequency-hopping transceiver module as in claim 1, wherein: The ultra-wideband frequency shift phase-locked loop circuit mixes the four point frequency signals with the wideband signals in the frequency range of 8-16 GHz in segments to always obtain intermediate frequency signals in the frequency range of 1000-2400 MHz.