CN210986083U - Low-phase noise frequency agility comprehensive circuit - Google Patents
Low-phase noise frequency agility comprehensive circuit Download PDFInfo
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- CN210986083U CN210986083U CN201922458828.2U CN201922458828U CN210986083U CN 210986083 U CN210986083 U CN 210986083U CN 201922458828 U CN201922458828 U CN 201922458828U CN 210986083 U CN210986083 U CN 210986083U
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Abstract
The utility model discloses a low phase noise frequency agility is combined circuit, the output of oscillator has two the tunnel, and one way is passed through frequency multiplier, frequency divider and harmonic filter and is connected with an input electricity of mixer, and another way is passed through harmonic generator and switch filter group and is connected with another input electricity of mixer, and the output and the band-pass filter electricity of mixer are connected. The utility model discloses a low phase noise frequency agility is combined circuit to the synthesis of simulation direct equation is as basic circuit, realizes through the mode combination to the reasonable frequency division of reference signal, doubling of frequency and adopting harmonic generator. The generated signal has good indexes, is mainly reflected in low phase noise and rapid frequency switching, has small volume and much reduced power consumption, and can be well implemented and applied in various fields.
Description
Technical Field
The utility model relates to a frequently combine the circuit field, specific frequency agility of making an uproar soon in specific saying so relates to this field is combined the circuit.
Background
The frequency synthesis technology, the low phase noise technology, the low spurious technology and the DDS technology are rapidly developed in recent decades, a frequency source is used as the heart of the existing microwave and high-frequency electronic system, the performance of the frequency source directly influences the key indexes and the technology of the electronic system, and the position of the frequency source is self-evident.
The analog direct type synthesis frequency source principle is simple and easy to realize, only adds, subtracts, multiplies and divides the frequency to generate new required frequency, and the performance of a filter and an electronic switch is greatly improved along with the rapid development of components, so that the mode is widely adopted. However, if the frequency hopping is realized by selecting an analog direct mode when the frequency hopping time is fast and the phase noise is good, various indexes of an output signal are not outstanding, and a series of adverse factors such as large volume, high power consumption and high cost are also accompanied.
The conventional analog direct synthesis frequency source implementation manner is as shown in fig. 1, an oscillator generates a reference signal by frequency multiplication, the signal is divided into two paths after frequency multiplication, one path enters a frequency multiplication circuit to generate a signal 1, the other path generates a signal 2 after frequency division, and the signal 2 is mixed with the signal 1 and then mixed with a signal after frequency multiplication and frequency division processing of the signal 2, so as to generate a required signal. The whole link is complex, the crosstalk is large, a large number of filters are needed to suppress the spurs, and the implementation mode is very large in size and high in power consumption.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem that a low phase noise frequency agility is combined circuit is provided.
In order to solve the technical problem, the utility model discloses a following technical scheme:
a low phase noise frequency agility frequency integrated circuit, the improvement is: the output end of the oscillator has two paths, one path is electrically connected with one input end of the frequency mixer through the frequency multiplier, the frequency divider and the harmonic filter, the other path is electrically connected with the other input end of the frequency mixer through the harmonic generator and the switch filter bank, and the output end of the frequency mixer is electrically connected with the band-pass filter.
Further, the frequency multiplier outputs a reference signal of 1 GHz.
Further, the frequency divider outputs an intermediate frequency signal of 250 MHz.
Further, the harmonics generator outputs a reference signal of 12 GHz-13 GHz, which is stepped by 100 MHz.
Further, the mixer outputs a signal of 12.25 GHz-13.25 GHz.
The utility model has the advantages that:
the utility model discloses a low phase noise frequency agility is combined circuit to the synthesis of simulation direct equation is as basic circuit, realizes through the mode combination to the reasonable frequency division of reference signal, doubling of frequency and adopting harmonic generator. The generated signal has good indexes, is mainly reflected in low phase noise and rapid frequency switching, has small volume and much reduced power consumption, and can be well implemented and applied in various fields.
Drawings
FIG. 1 is a circuit for implementing a conventional analog direct-type synthesized frequency source;
fig. 2 is a block diagram of the low-phase noise agile frequency synthesizer circuit disclosed in embodiment 1 of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Embodiment 1, as shown in fig. 2, this embodiment discloses a low-phase noise frequency agile integrated circuit, where the output end of an oscillator 1 has two paths, one path is electrically connected to one input end of a mixer 7 through a frequency multiplier 2, a frequency divider 4, and a harmonic filter 6, the other path is electrically connected to the other input end of the mixer 7 through a harmonic generator 3 and a switch filter bank 5, and the output end of the mixer 7 is electrically connected to a band-pass filter 8.
Specifically, the method comprises the following steps: the signal of the oscillator is divided into two paths, one path is input to a frequency multiplier BPQ5M, the frequency multiplier generates a reference signal of 1GHz, the reference signal generates a 250MHz signal through a frequency divider SID004SP3, the 250MHz signal enters a mixer as an intermediate frequency signal, the other path of oscillator signal generates a reference signal of 12 GHz-13 GHz through a harmonic generator, the signal is stepped to 100MHz, the frequency is switched through a switch filter bank, the reference signal is used as a local oscillation signal of the mixer to be mixed with the 250MHz intermediate frequency signal, and a required signal of 12.25 GHz-13.25 GHz is generated.
The specific technical indexes of the circuit are as follows: (1) output frequency: 12.25 GHz-13.25 GHz; (2) frequency stepping: 100 MHz; (3) output power: not less than +10 dBm; (4) frequency stability: less than or equal to plus or minus 0.1 ppm; (5) phase noise: less than or equal to-118 dBc/Hz @1 kHz; (at 13.25 GHz); (6) harmonic suppression: not less than 70 dBc; (7) stray suppression: not less than 75 dBc; (8) frequency hopping time: less than or equal to 1 us.
The circuit solves the difficulty of selecting proper intermediate frequency signals by a mode of firstly carrying out frequency multiplication and then carrying out frequency division on the oscillator, the oscillator generates local oscillation signals through a harmonic generator to replace multiple frequency mixing signals in a direct analog mode, and the volume and the power consumption are improved. The two modes are combined for use, so that the frequency synthesis technology of low phase noise and quick frequency hopping is solved.
The circuit can realize the generation of low-phase noise and quick frequency switching signals, the phase noise of the generated signals mainly depends on the phase noise of signals generated by a harmonic generator, the frequency switching time is usually only the switching time of a switch filter bank and is usually only hundreds of ns, all used devices are domestic devices, and the national production target can be realized.
Claims (5)
1. A low phase noise frequency agility is combined circuit which characterized in that: the output end of the oscillator has two paths, one path is electrically connected with one input end of the frequency mixer through the frequency multiplier, the frequency divider and the harmonic filter, the other path is electrically connected with the other input end of the frequency mixer through the harmonic generator and the switch filter bank, and the output end of the frequency mixer is electrically connected with the band-pass filter.
2. The low phase noise agile frequency synthesizer circuit of claim 1 wherein: the frequency multiplier outputs a reference signal of 1 GHz.
3. The low phase noise agile frequency synthesizer circuit of claim 1 wherein: the frequency divider outputs an intermediate frequency signal of 250 MHz.
4. The low phase noise agile frequency synthesizer circuit of claim 1 wherein: the harmonics generator outputs a 12 GHz-13 GHz reference signal which is stepped by 100 MHz.
5. The low phase noise agile frequency synthesizer circuit of claim 1 wherein: the mixer outputs a signal of 12.25 GHz-13.25 GHz.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201922458828.2U CN210986083U (en) | 2019-12-30 | 2019-12-30 | Low-phase noise frequency agility comprehensive circuit |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201922458828.2U CN210986083U (en) | 2019-12-30 | 2019-12-30 | Low-phase noise frequency agility comprehensive circuit |
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| CN210986083U true CN210986083U (en) | 2020-07-10 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112422124A (en) * | 2021-01-21 | 2021-02-26 | 成都市克莱微波科技有限公司 | Broadband agile frequency source and working method thereof |
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2019
- 2019-12-30 CN CN201922458828.2U patent/CN210986083U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112422124A (en) * | 2021-01-21 | 2021-02-26 | 成都市克莱微波科技有限公司 | Broadband agile frequency source and working method thereof |
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