CN218570220U - Satellite-borne low-phase-noise frequency source - Google Patents
Satellite-borne low-phase-noise frequency source Download PDFInfo
- Publication number
- CN218570220U CN218570220U CN202223038245.2U CN202223038245U CN218570220U CN 218570220 U CN218570220 U CN 218570220U CN 202223038245 U CN202223038245 U CN 202223038245U CN 218570220 U CN218570220 U CN 218570220U
- Authority
- CN
- China
- Prior art keywords
- circuit
- output end
- sampling
- phase
- sampling phase
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000005070 sampling Methods 0.000 claims abstract description 55
- 230000010355 oscillation Effects 0.000 claims abstract description 24
- 230000008878 coupling Effects 0.000 claims abstract description 18
- 238000010168 coupling process Methods 0.000 claims abstract description 18
- 238000005859 coupling reaction Methods 0.000 claims abstract description 18
- 239000003990 capacitor Substances 0.000 claims description 15
- 238000009792 diffusion process Methods 0.000 claims description 3
- 238000001228 spectrum Methods 0.000 abstract description 4
- 238000013461 design Methods 0.000 abstract description 3
- 238000000034 method Methods 0.000 abstract description 3
- 238000005516 engineering process Methods 0.000 description 6
- 238000004891 communication Methods 0.000 description 4
- 238000011161 development Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000003321 amplification Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 230000007480 spreading Effects 0.000 description 1
- 230000002194 synthesizing effect Effects 0.000 description 1
Images
Landscapes
- Stabilization Of Oscillater, Synchronisation, Frequency Synthesizers (AREA)
Abstract
The utility model relates to a satellite-borne low-phase noise frequency source, which comprises a reference source, a sampling phase discriminator, an expansion capturing circuit, a filter circuit, a medium oscillation circuit and a coupling circuit; the output end of the reference source is connected with the input end of the sampling phase discriminator, the output end of the sampling phase discriminator is connected with the input ends of the spread-capture circuit and the filter circuit, the output ends of the spread-capture circuit and the filter circuit are connected with the input end of the dielectric oscillation circuit, the output end of the dielectric oscillation circuit is connected with the input end of the coupling circuit, and the output end of the coupling circuit is connected with the sampling phase discriminator and outputs signals. The utility model discloses an introduce new sample phase demodulation circuit, utilize sample phase locking technique with whole circuit optimal design to satisfy the requirement of the synthetic low phase noise of present frequency source, high-purity frequency spectrum, high stability.
Description
Technical Field
The utility model relates to the field of communication technology, especially, relate to a satellite-borne low phase noise frequency source.
Background
With the continuous development of the industries such as radar, satellite measurement and control communication technology, space detection, measuring instruments and the like, the system puts higher requirements on performance indexes such as phase noise, frequency spectrum purity, frequency stability and the like of the local vibration source.
The popular frequency division type phase-locked oscillation source has obtained excellent performance, but the effect of the factors such as limited process level of self design on phase noise is not satisfactory. Under the situation, the sampling phase-locked oscillation source draws wide attention of engineers due to the advantages of the sampling phase-locked oscillation source in the aspect of phase noise, the technology utilizes the advantages that a sampling phase-locked frequency multiplier of a Dielectric Resonator Voltage Controlled Oscillator (DRVCO) has high output frequency, small additional phase noise, small volume power consumption and the like, and the sampling phase-locked frequency multiplier can be widely applied to the fields of spaceflight, military affairs, satellite communication and the like. In the past, the scheme of combining sampling phase locking with a DRVCO (digital controlled oscillator) to realize high-frequency oscillation sources is that the phase noise superiority of the sampling phase locking cannot be reflected on indexes by a scheme of low-frequency phase locking and frequency doubling, and the upper limit working frequency of a sampling phase discriminator is limited mainly because the narrow pulse forming technology is not mature at the time; however, with the development of the narrow pulse forming technology, the upper limit working frequency of the sampler is higher and higher, and the sampling phase-locked frequency source designed by the present sampling phase discriminator can already meet the environmental use requirement of the low-phase-noise satellite communication platform, so how to design the low-phase-noise frequency source meeting the use requirement is currently considered.
It is noted that the information disclosed in the above background section is only for enhancement of understanding of the background of the present disclosure and therefore may include information that does not constitute prior art that is already known to a person of ordinary skill in the art.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to overcome prior art's shortcoming, provide a satellite-borne low phase frequency source of making an uproar, solved the problem that current low phase frequency source of making an uproar exists.
The purpose of the utility model is realized through the following technical scheme: a satellite-borne low-phase-noise frequency source comprises a reference source, a sampling phase discriminator, a spread-capture circuit, a filter circuit, a dielectric oscillation circuit and a coupling circuit; the output end of the reference source is connected with the input end of the sampling phase discriminator, the output end of the sampling phase discriminator is connected with the input ends of the spread-capture circuit and the filter circuit, the output ends of the spread-capture circuit and the filter circuit are connected with the input end of the dielectric oscillation circuit, the output end of the dielectric oscillation circuit is connected with the input end of the coupling circuit, and the output end of the coupling circuit is connected with the sampling phase discriminator and outputs signals.
The sampling phase discriminator comprises a pulse forming circuit, a sampling circuit and a holding circuit; the output end of the pulse forming circuit is connected with the input end of the sampling circuit, and the output end of the sampling circuit is connected with the output end of the holding circuit.
The output end of the reference source is connected with the input end of the pulse forming circuit, the output end of the holding circuit is connected with the input ends of the diffusion circuit and the filter circuit, and the output end of the coupling circuit is connected with the input end of the sampling circuit.
The amplifying and capturing circuit comprises an operational amplifier U4, capacitors C3 and C6 and a resistor R3 are connected between a No. 3 pin and a No. 6 pin of the operational amplifier U4, the capacitor C3 is connected with the resistor R3 in series, the capacitor C3 is connected with the capacitor C6 in parallel, and the capacitors C3, C6 and the resistor R3 form a filter circuit.
The utility model has the advantages of it is following: a new sampling phase discrimination circuit is introduced, and the whole circuit is optimally designed by utilizing a sampling phase locking technology so as to meet the requirements of synthesizing low phase noise, high-purity frequency spectrum and high stability of the current frequency source.
Drawings
FIG. 1 is a schematic circuit diagram of the present invention;
FIG. 2 is a circuit schematic of a sampling phase detector;
fig. 3 is a schematic diagram of a capture spreading circuit and a filter circuit.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all the embodiments. The components of the embodiments of the present application, generally described and illustrated in the figures herein, can be arranged and designed in a wide variety of different configurations. Thus, the detailed description of the embodiments of the present application provided below in connection with the appended drawings is not intended to limit the scope of the claimed application, but is merely representative of selected embodiments of the application. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present application without making any creative effort, shall fall within the protection scope of the present application. The present invention will be further described with reference to the accompanying drawings.
As shown in fig. 1, the utility model relates to a satellite-borne low-phase noise frequency source, which comprises a reference source, a sampling phase discriminator, a capturing circuit, a filter circuit, a medium oscillation circuit and a coupling circuit; the output end of the reference source is connected with the input end of the sampling phase discriminator, the output end of the sampling phase discriminator is connected with the input ends of the spread-capture circuit and the filter circuit, the output ends of the spread-capture circuit and the filter circuit are connected with the input end of the dielectric oscillation circuit, the output end of the dielectric oscillation circuit is connected with the input end of the coupling circuit, and the output end of the coupling circuit is connected with the sampling phase discriminator and outputs signals.
Furthermore, the sampling phase discriminator mainly comprises a pulse forming circuit, a sampling circuit and a holding circuit; the output end of the pulse forming circuit is connected with the input end of the sampling circuit, and the output end of the sampling circuit is connected with the output end of the holding circuit. The output end of the reference source is connected with the input end of the pulse forming circuit, the output end of the holding circuit is connected with the input ends of the capturing circuit and the filter circuit, and the output end of the coupling circuit is connected with the input end of the sampling circuit.
Wherein, as shown in fig. 2, because the integration of device, the type is JVJQ2018 type sampling phase discriminator for use to the sampling phase discriminator, the reference signal passes through the inside step pipe formation comb spectrum signal of device, through coupling capacitance, compare with RF input signal in schottky pipe department, when RF input signal frequency is the integer multiple of reference signal frequency, get rid of high frequency signal through the LC wave filter, a stable direct current voltage signal of LF output, when RF signal frequency ≠ reference signal's integer multiple, get rid of high frequency signal through the LC wave filter circuit, continuous IF signal (beat voltage) is exported to the LF output, thereby realize the sampling phase discrimination function.
Furthermore, the dielectric oscillation circuit adopts an integrated circuit device CRO2013S-1 type voltage-controlled dielectric oscillator, and the coupling circuit adopts a traditional directional microstrip coupler.
As shown in fig. 3, the spread-capture circuit includes an operational amplifier U4, capacitors C3 and C6 and a resistor R3 are connected between a 3 rd pin and a 6 th pin of the operational amplifier U4, the capacitor C3 is connected in series with the resistor R3, the capacitor C3 is connected in parallel with the capacitor C6, and the capacitors C3 and C6 and the resistor R3 constitute a filter circuit; the signals after sampling and phase discrimination are sent to the circuit for filtering and amplification, and the whole circuit adopts a mature active filter circuit.
The working process of the utility model is as follows: after a reference signal is input by a reference source, a step diode of a pulse forming circuit in a driving sampling phase discriminator is converted into a sampling pulse of millisecond level, the repetition period of the pulse is completely consistent with the frequency period of the reference source signal, the sampling pulse is periodically sent into a sampling circuit of the sampling phase discriminator together with a radio frequency signal of a dielectric oscillation circuit obtained through a coupling circuit, then a holding circuit holds the sampled voltage to the next period, when the dielectric oscillation circuit is integral multiple of the reference frequency and keeps strict phase synchronization, the sampling phase discriminator outputs an error voltage, a stable direct current voltage is formed after the dielectric oscillation circuit passes through a filter circuit and a capturing circuit, the dielectric oscillation circuit continuously oscillates and outputs the radio frequency signal, otherwise, the error voltage is a continuous step-shaped beat voltage output through the holding circuit, and the dielectric oscillation circuit is pulled until the circuit is locked. In the circuit, when the frequency of the radio frequency signal output by the dielectric oscillation circuit is near a certain harmonic of the sampling pulse frequency, the dielectric oscillation circuit can be locked on the certain harmonic of the sampling pulse frequency through the control action of the filter circuit and the diffusion circuit.
The foregoing is illustrative of the preferred embodiments of the present invention, and it is to be understood that the invention is not limited to the precise forms disclosed herein, and that various other combinations, modifications, and environments may be resorted to, falling within the scope of the invention as defined by the appended claims. But that modifications and variations may be effected by those skilled in the art without departing from the spirit and scope of the invention, which is to be limited only by the claims appended hereto.
Claims (4)
1. A satellite-borne low-phase-noise frequency source, characterized by: the device comprises a reference source, a sampling phase discriminator, an expansion and capture circuit, a filter circuit, a dielectric oscillation circuit and a coupling circuit; the output end of the reference source is connected with the input end of the sampling phase discriminator, the output end of the sampling phase discriminator is connected with the input ends of the spread-capture circuit and the filter circuit, the output ends of the spread-capture circuit and the filter circuit are connected with the input end of the dielectric oscillation circuit, the output end of the dielectric oscillation circuit is connected with the input end of the coupling circuit, and the output end of the coupling circuit is connected with the sampling phase discriminator and outputs signals.
2. A satellite-borne low-phase-noise frequency source according to claim 1, characterized in that: the sampling phase discriminator comprises a pulse forming circuit, a sampling circuit and a holding circuit; the output end of the pulse forming circuit is connected with the input end of the sampling circuit, and the output end of the sampling circuit is connected with the output end of the holding circuit.
3. A satellite-borne low-phase-noise frequency source according to claim 2, characterized in that: the output end of the reference source is connected with the input end of the pulse forming circuit, the output end of the holding circuit is connected with the input ends of the diffusion circuit and the filter circuit, and the output end of the coupling circuit is connected with the input end of the sampling circuit.
4. A satellite-borne low-phase-noise frequency source according to claim 1, characterized in that: the amplifying and capturing circuit comprises an operational amplifier U4, capacitors C3 and C6 and a resistor R3 are connected between a No. 3 pin and a No. 6 pin of the operational amplifier U4, the capacitor C3 is connected with the resistor R3 in series, the capacitor C3 is connected with the capacitor C6 in parallel, and the capacitors C3, C6 and the resistor R3 form a filter circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223038245.2U CN218570220U (en) | 2022-11-14 | 2022-11-14 | Satellite-borne low-phase-noise frequency source |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223038245.2U CN218570220U (en) | 2022-11-14 | 2022-11-14 | Satellite-borne low-phase-noise frequency source |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218570220U true CN218570220U (en) | 2023-03-03 |
Family
ID=85323718
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202223038245.2U Active CN218570220U (en) | 2022-11-14 | 2022-11-14 | Satellite-borne low-phase-noise frequency source |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218570220U (en) |
-
2022
- 2022-11-14 CN CN202223038245.2U patent/CN218570220U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Moncunill-Geniz et al. | An 11-Mb/s 2.1-mW synchronous superregenerative receiver at 2.4 GHz | |
| CN103134983B (en) | Based on Terahertz related detection system and the method for single frequency mixer | |
| CN206431285U (en) | A kind of Ku wave bands continuous wave radar radio circuit | |
| CN107395200B (en) | Ultra-low noise frequency synthesis and frequency transfer circuit for rubidium frequency standard | |
| CN102394647B (en) | Intermittent rubidum atomic clock microwave frequency synthesizer | |
| US9049080B2 (en) | Injection-locked RF receiver having trifilar transformer splitter | |
| CN101409556B (en) | Control method and control circuit for passive hydrogen clock | |
| CN218570220U (en) | Satellite-borne low-phase-noise frequency source | |
| CN205792524U (en) | Radar clock multiplier based on step-recovery diode | |
| CN201878129U (en) | Microwave frequency band low-phase noise locking phase medium oscillator | |
| CN102163970A (en) | Phase-locked dielectric resonator oscillator with low phase noise at microwave frequency band | |
| CN217879614U (en) | Civil aviation DME receiver circuit | |
| CN207677709U (en) | A kind of broadband frequency synthesizer based on cascade connection type PLL structures | |
| CN213402977U (en) | Low-phase-noise phase-locked dielectric oscillator | |
| CN102545826B (en) | The local frequency source of secondary of frequency conversion receiver for satellite | |
| CN218772056U (en) | Miniaturized low-power consumption mixing phase-locked circuit | |
| CN105429632B (en) | The microwave local signal generator of small integrated | |
| CN114284839A (en) | Active mode-locking photoelectric oscillator based on injection locking technology | |
| CN206023744U (en) | X frequency range Low phase noise phase lock dielectric oscillators | |
| CN217278889U (en) | Frequency source for weak signal detection radar system | |
| CN207339815U (en) | Ultralow phase noise frequency synthesizer | |
| CN210109311U (en) | X-waveband frequency-sweeping synthesizer for navigation radar | |
| CN220798258U (en) | Reference frequency locking device and satellite terminal equipment | |
| CN213906656U (en) | Low-phase noise frequency synthesizer | |
| CN218648801U (en) | Dielectric resonator oscillator point frequency doubling source device based on different frequency points |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: A spaceborne low phase noise frequency source Effective date of registration: 20231201 Granted publication date: 20230303 Pledgee: Chengdu financial holding Financing Guarantee Co.,Ltd. Pledgor: Chengdu Gongjue Microelectronics Co.,Ltd. Registration number: Y2023510000263 |