WO2014106899A1 - Source d'oscillation à haute fréquence - Google Patents

Source d'oscillation à haute fréquence Download PDF

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Publication number
WO2014106899A1
WO2014106899A1 PCT/JP2013/050030 JP2013050030W WO2014106899A1 WO 2014106899 A1 WO2014106899 A1 WO 2014106899A1 JP 2013050030 W JP2013050030 W JP 2013050030W WO 2014106899 A1 WO2014106899 A1 WO 2014106899A1
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WO
WIPO (PCT)
Prior art keywords
frequency
injection
oscillator
output
phase noise
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Application number
PCT/JP2013/050030
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English (en)
Japanese (ja)
Inventor
津留　正臣
恒次 堤
谷口　英司
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三菱電機株式会社
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Application filed by 三菱電機株式会社 filed Critical 三菱電機株式会社
Priority to JP2014555411A priority Critical patent/JPWO2014106899A1/ja
Priority to PCT/JP2013/050030 priority patent/WO2014106899A1/fr
Publication of WO2014106899A1 publication Critical patent/WO2014106899A1/fr

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    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03L—AUTOMATIC CONTROL, STARTING, SYNCHRONISATION OR STABILISATION OF GENERATORS OF ELECTRONIC OSCILLATIONS OR PULSES
    • H03L7/00—Automatic control of frequency or phase; Synchronisation
    • H03L7/24—Automatic control of frequency or phase; Synchronisation using a reference signal directly applied to the generator
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03L—AUTOMATIC CONTROL, STARTING, SYNCHRONISATION OR STABILISATION OF GENERATORS OF ELECTRONIC OSCILLATIONS OR PULSES
    • H03L7/00—Automatic control of frequency or phase; Synchronisation
    • H03L7/06—Automatic control of frequency or phase; Synchronisation using a reference signal applied to a frequency- or phase-locked loop
    • H03L7/16—Indirect frequency synthesis, i.e. generating a desired one of a number of predetermined frequencies using a frequency- or phase-locked loop
    • H03L7/18—Indirect frequency synthesis, i.e. generating a desired one of a number of predetermined frequencies using a frequency- or phase-locked loop using a frequency divider or counter in the loop
    • H03L7/183—Indirect frequency synthesis, i.e. generating a desired one of a number of predetermined frequencies using a frequency- or phase-locked loop using a frequency divider or counter in the loop a time difference being used for locking the loop, the counter counting between fixed numbers or the frequency divider dividing by a fixed number

Definitions

  • the present invention relates to a high-frequency oscillation source that uses a low-phase noise oscillator, a frequency divider, and an injection-locked oscillator to reduce the phase noise and increase the bandwidth.
  • a voltage-controlled oscillator including an active circuit that amplifies power and a tuning circuit that roughly determines an oscillation frequency.
  • Noise in the circuit of the voltage controlled oscillator is amplified by the active circuit, and the amplified power is input to the tuning circuit.
  • the oscillation frequency is a frequency at which the phase becomes 0 ° by reciprocation between the active circuit and the tuning circuit, but the tuning circuit includes a distributed constant resonator, and the slope of the phase of the active circuit is small.
  • the oscillation frequency is determined by the resonator. Thereafter, the power is returned to the active circuit, and the power is further amplified to perform an oscillation operation.
  • the tuning circuit includes a varactor diode.
  • the resonance frequency of the tuning circuit changes and the oscillation frequency can be controlled.
  • the electrical length of the distributed constant resonator is increased and the phase noise is reduced. From the above, the phase noise is improved by increasing the load Q of the tuning circuit (see, for example, Patent Document 1 below).
  • the phase noise is traded off with the oscillation frequency bandwidth or the tuning sensitivity.
  • the improvement amount of the low phase noise is limited by the frequency bandwidth.
  • the present invention has been made to solve the above problems, and an object of the present invention is to provide a high-frequency oscillation source capable of obtaining low phase noise characteristics regardless of the bandwidth even in a wide frequency bandwidth. To do.
  • a high frequency oscillation source includes a low phase noise oscillator that oscillates at a predetermined frequency, a frequency divider that divides the output frequency of the low phase noise oscillator, and an output wave that is divided by the frequency divider. And an injection locking oscillator that oscillates in synchronization with the injection wave, and a control unit that controls the output frequency of the frequency divider to be an integral fraction of the oscillation frequency of the injection locking oscillator.
  • control means controls the output frequency of the frequency divider to be an integral fraction of the oscillation frequency of the injection-locked oscillator, even if the oscillation frequency bandwidth of the injection-locked oscillator is widened,
  • the phase noise of the injection-locked oscillator is synchronized with the phase noise of the low-phase noise oscillator (the same value when converted to the same frequency), and there is an effect that low phase noise characteristics can be obtained regardless of the bandwidth.
  • Embodiment 1 of this invention It is a block diagram which shows the high frequency oscillation source by Embodiment 1 of this invention. It is a block diagram which shows the other high frequency oscillation source by Embodiment 1 of this invention. It is a block diagram which shows the other high frequency oscillation source by Embodiment 1 of this invention. It is a block diagram which shows the high frequency oscillation source by Embodiment 2 of this invention. It is a block diagram which shows the high frequency oscillation source by Embodiment 3 of this invention. It is a block diagram which shows the other high frequency oscillation source by Embodiment 3 of this invention. It is a block diagram which shows the other high frequency oscillation source by Embodiment 3 of this invention. It is a block diagram which shows the other high frequency oscillation source by Embodiment 3 of this invention. It is a block diagram which shows the other high frequency oscillation source by Embodiment 3 of this invention. It is a block diagram which shows the other high frequency oscillation source by Embodiment 3 of this invention
  • FIG. 1 is a block diagram showing a high-frequency oscillation source according to Embodiment 1 of the present invention.
  • the low phase noise oscillator 1 oscillates at a predetermined frequency.
  • the frequency divider 2 divides the frequency of the output wave of the low phase noise oscillator 1.
  • the injection-locked oscillator 3 uses the output wave divided by the frequency divider 2 as an injection wave, and oscillates in synchronization with the injection wave.
  • the control means 4 controls the frequency division number of the frequency divider 2 so that the output frequency of the frequency divider 2 becomes 1 / integer of the oscillation frequency of the injection locked oscillator 3.
  • the frequency divider 2 When the output wave from the low phase noise oscillator 1 is input to the frequency divider 2, the frequency is divided according to the frequency division number of the frequency divider 2 and injected into the injection locking oscillator 3.
  • the injection-locked oscillator 3 synchronizes with the frequency and phase noise of the injected radio wave as long as the frequency of the injected radio wave can be synchronized.
  • the frequency that can be synchronized varies in detail depending on the Q value, the injected power, and the like, but is mainly the same frequency, a divided frequency such as a 1/2 harmonic, a 1/3 harmonic, or the like.
  • the oscillation frequency of the injection locking oscillator 3 is set so that a desired frequency is output from the injection locking oscillator 3, and the frequency division number of the frequency divider 2 is controlled from the ratio with the output frequency of the low phase noise oscillator 1.
  • the frequency division number of the frequency divider 2 is controlled from the ratio with the output frequency of the low phase noise oscillator 1.
  • the frequency division number N may be a fraction.
  • the frequency division number N can be set to a fraction by applying a control method similar to the fractional control performed in the phase locked loop (PLL) to the frequency divider.
  • PLL phase locked loop
  • the oscillation frequency of the injection locked oscillator 3 needs to be a frequency that can be synchronized with the injection frequency. Therefore, when the injection locking range is narrow, the frequency of the frequency division is controlled and the oscillation frequency of the injection locking oscillator 3 can be synchronized with the injection frequency (the voltage between the terminals of the varactor diode included in the injection locking oscillator 3). Change by control etc.) As shown in FIG. 2, by providing the injection locking oscillator 3 with the coupler 31 and the PLL 32, it is possible to easily set the oscillation frequency of the injection locking oscillator 3 within a range that can be synchronized with the injection frequency. . When the injection locking range is wide, the oscillation frequency of the injection locking oscillator 3 may be changed so as to be more easily synchronized with the injection frequency along with the control of the frequency division number, but can be synchronized without changing. You can leave it as it is.
  • the injection-locked oscillator 3 When there is no injection wave, the injection-locked oscillator 3 tries to obtain an oscillation frequency in a wide band, but the phase noise becomes higher (deteriorates) than the value obtained on the right side of the equation (3). If there is an injection wave using the low phase noise oscillator 1 as a reference source, low phase noise characteristics can be obtained regardless of the bandwidth. Further, since the low phase noise oscillator 1 may have a narrow band, it is easy to obtain low phase noise characteristics.
  • the low phase noise oscillator 1 that oscillates at a predetermined frequency
  • the frequency divider 2 that divides the output frequency of the low phase noise oscillator 1
  • the frequency divider 2 that divides the output frequency of the low phase noise oscillator 1
  • the frequency-divided output wave is used as an injection wave
  • the injection-locked oscillator 3 that oscillates in synchronization with the injection wave, and the output frequency of the frequency divider 2 are divided so as to be an integral fraction of the oscillation frequency of the injection-locked oscillator 3.
  • a control means 4 for controlling the frequency division number of the frequency divider 2.
  • the control means 4 controls the frequency division number of the frequency divider 2 so that the output frequency of the frequency divider 2 becomes an integral fraction of the oscillation frequency of the injection locked oscillator 3.
  • the phase noise of the injection locked oscillator 3 is synchronized with the phase noise of the low phase noise oscillator 1 (the same value when converted to the same frequency), and the characteristics of the low phase noise regardless of the bandwidth. Can be obtained.
  • FIG. 3 is a block diagram showing another high frequency oscillation source according to Embodiment 1 of the present invention.
  • the frequency divider 2 is constituted by a cascade connection of a control frequency divider 21 and a pre-frequency divider 22, and the pre-frequency divider 22 divides the frequency of the output wave of the low phase noise oscillator 1.
  • the control frequency divider 21 divides the frequency of the output wave of the pre-frequency divider 22.
  • Other configurations are the same as those in FIG.
  • the output wave of the low phase noise oscillator 1 is input to the frequency divider 2, but the output wave of the low phase noise oscillator 1 is input to the pre-divider (prescaler) 22 as shown in FIG.
  • the signal may be input to the control frequency divider 21.
  • a filter or the like may be provided so that a radio wave of an unnecessary frequency is not output from the output wave of the frequency divider 2, and the pass band of the filter may be variable.
  • FIG. 4 is a block diagram showing a high-frequency oscillation source according to Embodiment 2 of the present invention.
  • the control means 5 controls the phase of the output wave of the low phase noise oscillator 1 so that the output frequency of the frequency divider 2 becomes 1 / integer of the oscillation frequency of the injection locked oscillator 3.
  • Other configurations are the same as those in FIG.
  • the frequency divider 2 When the output wave from the low phase noise oscillator 1 is input to the frequency divider 2, the frequency is divided according to the frequency division number of the frequency divider 2 and injected into the injection locking oscillator 3.
  • the injection-locked oscillator 3 synchronizes with the frequency and phase noise of the injected radio wave as long as the frequency of the injected radio wave can be synchronized.
  • the frequency that can be synchronized varies in detail depending on the Q value, the injected power, and the like, but is mainly the same frequency, a divided frequency such as a 1/2 harmonic, a 1/3 harmonic, or the like.
  • the oscillation frequency of the injection locking oscillator 3 is set so that a desired frequency is output from the injection locking oscillator 3, and the frequency division number of the frequency divider 2 is determined from the ratio with the output frequency of the low phase noise oscillator 1.
  • the low phase noise oscillator 1 that oscillates at a predetermined frequency
  • the frequency divider 2 that divides the output frequency of the low phase noise oscillator 1
  • the frequency divider 2 that divides the output frequency of the low phase noise oscillator 1
  • the frequency-divided output wave is used as an injection wave
  • the injection-locked oscillator 3 that oscillates in synchronization with the injection wave and the output frequency of the frequency divider 2 are low so that the output frequency is an integral fraction of the oscillation frequency of the injection-locked oscillator 3.
  • control means 5 for controlling the phase of the output wave of the phase noise oscillator 1.
  • the control means 5 controls the phase of the output wave of the low phase noise oscillator 1 so that the output frequency of the frequency divider 2 becomes an integral number of the oscillation frequency of the injection locked oscillator 3. Even if the frequency bandwidth is widened, the phase noise of the injection-locked oscillator 3 is synchronized with the phase noise of the low-phase noise oscillator 1 (the same value when converted to the same frequency), and low phase noise regardless of the bandwidth. Characteristics can be obtained.
  • FIG. 5 is a block diagram showing a high-frequency oscillation source according to Embodiment 3 of the present invention.
  • the low phase noise oscillator 1 oscillates at a predetermined frequency.
  • the injection locking oscillator 3 oscillates in synchronization with the injection wave.
  • the mixer 6 mixes the output wave of the low phase noise oscillator 1 and the output wave of the injection locked oscillator 3.
  • the band pass filter 7 filters the output wave of the mixer 6.
  • the frequency divider 2 divides the frequency of the output wave partially fed back from the output wave of the bandpass filter 7 and outputs it as an injection wave to the injection locking oscillator 3.
  • the control means 4 controls the frequency division number of the frequency divider 2 so that the output frequency of the frequency divider 2 becomes 1 / integer of the oscillation frequency of the injection locked oscillator 3.
  • the output wave from the injection-locked oscillator 3 and the output wave from the low-phase noise oscillator 1 are input to the mixer 6, and the sum of the output frequency of the injection-locked oscillator 3 and the output frequency of the low-phase noise oscillator 1 by mixing (frequency mixing). And the difference frequency are output.
  • the difference frequency is selected and output by the bandpass filter 7, and a part thereof is input to the frequency divider 2.
  • the input radio wave of the bandpass filter 7 is frequency-divided according to the frequency dividing number of the frequency divider 2 and injected into the injection locking oscillator 3.
  • the injection-locked oscillator 3 synchronizes with the frequency and phase noise of the injected radio wave as long as the frequency of the injected radio wave can be synchronized.
  • the phase noise after injection locking is a value corresponding to the phase noise of the low phase noise oscillator 1.
  • the frequency that can be synchronized varies in detail depending on the Q value, the injected power, and the like, but is mainly the same frequency, a divided frequency such as a 1/2 harmonic, a 1/3 harmonic, or the like.
  • the oscillation frequency of the injection locked oscillator 3 is set so that a desired frequency is obtained, and the frequency dividing number of the frequency divider 2 is set by the control means 4 from the ratio to the output frequency of the band pass filter 7.
  • the control means 4 from the ratio to the output frequency of the band pass filter 7.
  • the oscillation frequency of the injection locked oscillator 3 needs to be a frequency that can be synchronized with the injection frequency. Therefore, when the injection locking range is narrow, the frequency of the frequency division is controlled and the oscillation frequency of the injection locking oscillator 3 can be synchronized with the injection frequency (the voltage between the terminals of the varactor diode included in the injection locking oscillator 3). Change by control etc.) When the injection locking range is wide, the oscillation frequency of the injection locking oscillator 3 may be changed so as to be more easily synchronized with the injection frequency along with the control of the frequency division number, but synchronization is possible without changing. You can leave it as it is.
  • phase noise is the same when the oscillation frequency of the injection locked oscillator 3 and the oscillation frequency of the low phase noise oscillator 1 are considered to be the same. In other words, it can be said that they are synchronized.
  • the injection-locked oscillator 3 increases (deteriorates) the phase noise when trying to obtain an oscillation frequency in a wide band.
  • the low-phase noise oscillator 1 is used as a reference source. When there is an injection wave, low phase noise characteristics can be obtained regardless of the bandwidth. Further, since the low phase noise oscillator 1 may have a narrow band, it is easy to obtain low phase noise characteristics.
  • Mixer 6 that mixes the output wave of injection-locked oscillator 3
  • bandpass filter 7 that filters the output wave of mixer 6, and the output frequency of bandpass filter 7 are frequency-divided and injected into injection-locked oscillator 3 as an injection wave
  • a frequency divider 2 for output and a control means 4 for controlling the frequency division number of the frequency divider 2 so that the output frequency of the frequency divider 2 is an integral fraction of the oscillation frequency of the injection locking oscillator 3 are provided. .
  • the control means 4 controls the frequency division number of the frequency divider 2 so that the output frequency of the frequency divider 2 becomes an integral fraction of the oscillation frequency of the injection locked oscillator 3. Even if the width is widened, the phase noise of the injection locked oscillator 3 is synchronized with the phase noise of the low phase noise oscillator 1 (the same value when converted to the same frequency), and the characteristics of the low phase noise regardless of the bandwidth. Can be obtained. In addition, by using a part of the output of the bandpass filter 7 as the output of the high-frequency oscillation source, it is possible to obtain an output with an expanded specific band.
  • FIG. 6 is a block diagram showing another high-frequency oscillation source according to Embodiment 3 of the present invention.
  • the pre-divider 22 divides the frequency of the output wave partially fed back from the output wave of the bandpass filter 7.
  • the control frequency divider 21 divides the frequency of the output wave of the pre-frequency divider 22 and outputs it as an injection wave to the injection locking oscillator 3.
  • Other configurations are the same as those in FIG.
  • FIG. 7 is a block diagram showing another high-frequency oscillation source according to Embodiment 3 of the present invention.
  • the output of the bandpass filter 7 is the difference frequency in FIG. 5
  • the output of the low phase noise oscillator 1 is included even if the output of the bandpass filter 8 is the sum frequency as shown in FIG. Therefore, the same effect can be obtained.
  • the difference frequency a frequency lower than the output frequency of the injection locking oscillator 3 is output, but the ratio band is wide.
  • the ratio band is narrower than the output frequency of the injection locking oscillator 3. A high frequency is output.
  • FIG. 8 is a block diagram showing another high-frequency oscillation source according to Embodiment 3 of the present invention.
  • a coupler 9 is provided between the injection locking oscillator 3 and the mixer 6 and branches and outputs the output wave of the injection locking oscillator 3.
  • Other configurations are the same as those in FIG.
  • a coupler 9 for branching and outputting the output wave of the injection locking oscillator 3 may be provided, or the output wave of the injection locking oscillator 3 may be taken out.
  • the pass band of the band pass filter 7 may be variable.
  • a filter or the like may be provided so that an unnecessary frequency radio wave is not output from the output wave of the frequency divider 2, and the pass band of the filter may be variable.
  • FIG. 9 is a block diagram showing a high-frequency oscillation source according to Embodiment 4 of the present invention.
  • the control means 5 controls the phase of the output wave of the low phase noise oscillator 1 so that the output frequency of the frequency divider 2 becomes 1 / integer of the oscillation frequency of the injection locked oscillator 3.
  • Other configurations are the same as those in FIG.
  • FIG. 4 shows that a high-frequency oscillation source with low phase noise can be obtained by controlling the phase of the output wave of the low phase noise oscillator 1 in the configuration corresponding to the first embodiment.
  • a high frequency oscillation source with low phase noise can be obtained in the configuration corresponding to the third embodiment.
  • Mixer 6 that mixes the output wave of injection-locked oscillator 3
  • bandpass filter 7 that filters the output wave of mixer 6, and the output frequency of bandpass filter 7 are frequency-divided and injected into injection-locked oscillator 3 as an injection wave
  • a frequency divider 2 for outputting and a control means 5 for controlling the phase of the output wave of the low phase noise oscillator 1 so that the output frequency of the frequency divider 2 is an integral fraction of the oscillation frequency of the injection locked oscillator 3.
  • the control means 5 controls the phase of the output wave of the low phase noise oscillator 1 so that the output frequency of the frequency divider 2 becomes an integral number of the oscillation frequency of the injection locked oscillator 3. Even if the frequency bandwidth is widened, the phase noise of the injection-locked oscillator 3 is synchronized with the phase noise of the low-phase noise oscillator 1 (the same value when converted to the same frequency), and low phase noise regardless of the bandwidth. Characteristics can be obtained.
  • the high-frequency oscillation source of the present invention has a frequency divider that divides the output frequency of the low-phase noise oscillator, and an output wave divided by the frequency divider is an injection wave, and is synchronized with the injection wave. Since it is configured to include an injection-locked oscillator that oscillates and a control unit that controls the output frequency of the frequency divider to be an integral fraction of the oscillation frequency of the injection-locked oscillator, Suitable for use in communication and radar systems used.

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  • Stabilization Of Oscillater, Synchronisation, Frequency Synthesizers (AREA)

Abstract

Dans la présente invention, un moyen de commande (4) commande des fréquences démultipliées à partir d'un démultiplicateur de fréquence (2) de sorte que la fréquence de sortie du démultiplicateur de fréquence (2) devient une fraction spécifiée d'un entier de la fréquence d'oscillation d'un oscillateur (3) verrouillé par injection, et donc le bruit de phase dans l'oscillateur (3) verrouillé par injection est synchronisé avec le bruit de phase d'un oscillateur (1) à faible bruit de phase (les valeurs étant égales quand toutes deux sont exprimées comme des fréquences égales) même quand la largeur de bande de fréquence d'oscillation de l'oscillateur (3) verrouillé par injection est élargie, et il est possible d'obtenir une source d'oscillation à haute fréquence caractérisée par un faible bruit de phase indépendamment de la largeur de bande.
PCT/JP2013/050030 2013-01-07 2013-01-07 Source d'oscillation à haute fréquence WO2014106899A1 (fr)

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JP2014555411A JPWO2014106899A1 (ja) 2013-01-07 2013-01-07 高周波発振源
PCT/JP2013/050030 WO2014106899A1 (fr) 2013-01-07 2013-01-07 Source d'oscillation à haute fréquence

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Cited By (2)

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Publication number Priority date Publication date Assignee Title
US20200106387A1 (en) * 2018-09-27 2020-04-02 Infineon Technologies Ag Calibrating an injection locked oscillator
CN111095797A (zh) * 2017-08-29 2020-05-01 德克萨斯仪器股份有限公司 用于低功率低相位噪声振荡器的自注入锁定

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Publication number Priority date Publication date Assignee Title
CN111095797A (zh) * 2017-08-29 2020-05-01 德克萨斯仪器股份有限公司 用于低功率低相位噪声振荡器的自注入锁定
CN111095797B (zh) * 2017-08-29 2023-10-20 德克萨斯仪器股份有限公司 用于低功率低相位噪声振荡器的自注入锁定
US20200106387A1 (en) * 2018-09-27 2020-04-02 Infineon Technologies Ag Calibrating an injection locked oscillator
US10855296B2 (en) * 2018-09-27 2020-12-01 Infineon Technologies Ag Calibrating an injection locked oscillator

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