CN213402977U - Low-phase-noise phase-locked dielectric oscillator - Google Patents
Low-phase-noise phase-locked dielectric oscillator Download PDFInfo
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- CN213402977U CN213402977U CN202022866453.6U CN202022866453U CN213402977U CN 213402977 U CN213402977 U CN 213402977U CN 202022866453 U CN202022866453 U CN 202022866453U CN 213402977 U CN213402977 U CN 213402977U
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Abstract
The utility model provides a low phase noise phase-locked medium oscillator, which comprises a radio frequency link and a control power circuit, wherein the radio frequency link is connected with the control power circuit; the radio frequency link comprises a pulse forming circuit, a sampling phase discriminator, a loop filter, an expansion and capture circuit, an electrically-tunable dielectric oscillator, a power coupler, an amplifier, a first filter, a second filter and a control power circuit; the pulse forming circuit is connected with the sampling phase discriminator, the sampling phase discriminator is connected with the loop filter and the expansion circuit, the electrically tunable dielectric oscillator is connected with the amplifier and the coupler, the coupler is connected with the first filter, the first filter is connected with the sampling phase discriminator, and the amplifier is connected with the second filter. The utility model discloses a sample phase-locked loop replaces traditional digital phase-locked loop, has eliminated the additional noise that digital phase-locked loop and frequency divider introduced, has realized the dot-frequency signal output of high stability, low phase noise.
Description
Technical Field
The utility model discloses mainly be applied to in frequency synthesis and microwave oscillator, particularly, relate to a low phase noise phase-locked dielectric oscillator.
Background
A microwave oscillator as a local oscillation source in a microwave device is one of key core components in a system. The continuous development of modern radar technology puts higher and higher requirements on the stability of frequency sources of communication equipment. The phase-locked loop frequency synthesis technology has the advantages of high reliability, low cost, good performance and the like, and is widely used in the microwave fields of communication, radar, guidance, navigation and the like. The traditional digital phase-locked loop mainly comprises a frequency divider, an active digital phase discriminator, a loop filter, a voltage-controlled oscillator and the like, and has the problem of poor near-carrier frequency phase noise when being used in a microwave frequency band due to higher noise floor of devices such as the frequency divider, the active digital phase discriminator and the like.
SUMMERY OF THE UTILITY MODEL
The utility model discloses it is higher at the bottom of making an uproar to aim at solving among the prior art digital phase-locked loop because of devices such as frequency divider, active digital phase discriminator cause, exists the poor problem of near carrier frequency phase noise when being used in the microwave frequency channel, provides a low phase noise phase-locked medium oscillator that can realize high stability, low phase noise point frequency signal output.
The embodiment of the utility model discloses a realize through following technical scheme: a low-phase-noise phase-locked medium oscillator comprises a radio frequency link and a control power supply circuit, wherein the radio frequency link is connected with the control power supply circuit;
the radio frequency link comprises a pulse forming circuit, a sampling phase discriminator, a loop filter, an expansion and capture circuit, an electrically-tunable dielectric oscillator, a power coupler, an amplifier, a first filter, a second filter and a control power circuit;
the output end of the pulse forming circuit is connected with the first input end of the sampling phase discriminator, and the output end of the sampling phase discriminator is connected with the input end of the loop filter and simultaneously connected with the input end of the capture expanding circuit; the input end of the electrically tunable dielectric oscillator is connected with the output end of the loop filter and simultaneously connected with the output end of the capture expanding circuit; the output end of the electrically tunable dielectric oscillator is connected with the input end of the amplifier and is also connected with the input end of the coupler; the output end of the coupler is connected with the input end of a first filter, and the output end of the first filter is connected with the second input end of the sampling phase discriminator; the output end of the amplifier is connected with the input end of the second filter.
According to a preferred embodiment, the input of the pulse forming circuit is connected with a reference signal input with the frequency of 60MHz, and the pulse forming circuit generates sampling pulses with the repetition frequency of 60 MHz.
According to a preferred embodiment, the first filter and the second filter are both low-pass filters.
According to a preferred embodiment, the control power supply circuit comprises a DC/DC converter,
the DC/DC converter is connected with a power supply voltage input with the voltage of +12V, and outputs the power supply voltage with the voltage of +5V to the radio frequency link.
The utility model discloses technical scheme has following advantage and beneficial effect at least: the utility model discloses a sample phase-locked loop replaces traditional digital phase-locked loop, has eliminated the additional noise that digital phase-locked loop and frequency divider introduced, has realized the dot-frequency signal output of high stability, low phase noise.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
Fig. 1 is a schematic structural diagram of a low phase noise phase-locked dielectric oscillator according to embodiment 1 of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
In the description of the present invention, it should be further noted that unless otherwise explicitly stated or limited, the terms "disposed," "mounted," "connected," and "connected" should be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Example 1
Referring to fig. 1, the present embodiment provides a low phase noise phase-locked dielectric oscillator, which includes a radio frequency link and a control power circuit, where the radio frequency link is connected to the control power circuit;
the radio frequency link comprises a pulse forming circuit, a sampling phase discriminator, a loop filter, an expansion and capture circuit, an electrically-tunable dielectric oscillator, a power coupler, an amplifier, a first filter, a second filter and a control power circuit;
the output end of the pulse forming circuit is connected with the first input end of the sampling phase discriminator, and the output end of the sampling phase discriminator is connected with the input end of the loop filter and simultaneously connected with the input end of the capture expanding circuit;
the input end of the electrically tunable dielectric oscillator is connected with the output end of the loop filter and simultaneously connected with the output end of the capture expanding circuit;
the output end of the electrically tunable dielectric oscillator is connected with the input end of the amplifier and is also connected with the input end of the coupler;
the output end of the coupler is connected with the input end of a first filter, and the output end of the first filter is connected with the second input end of the sampling phase discriminator;
the output end of the amplifier is connected with the input end of the second filter, and the output end of the second filter outputs radio frequency signals.
Specifically, in this embodiment, the input end of the pulse forming circuit is connected to a reference signal input with a frequency of 60MHz, and the pulse forming circuit generates a sampling pulse with a repetition frequency of 60 MHz.
Specifically, in this embodiment, the first filter and the second filter are both low-pass filters.
Specifically, in this embodiment, the control power supply circuit includes a DC/DC converter, the DC/DC converter is connected to a power supply voltage input with a voltage of +12V, and the DC/DC converter outputs a power supply voltage with a voltage of +5V to the radio frequency link.
The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (4)
1. A low phase noise phase-locked medium oscillator is characterized by comprising a radio frequency link and a control power circuit, wherein the radio frequency link is connected with the control power circuit;
the radio frequency link comprises a pulse forming circuit, a sampling phase discriminator, a loop filter, an expansion and capture circuit, an electrically-tunable dielectric oscillator, a power coupler, an amplifier, a first filter, a second filter and a control power circuit;
the output end of the pulse forming circuit is connected with the first input end of the sampling phase discriminator, and the output end of the sampling phase discriminator is connected with the input end of the loop filter and simultaneously connected with the input end of the capture expanding circuit; the input end of the electrically tunable dielectric oscillator is connected with the output end of the loop filter and simultaneously connected with the output end of the capture expanding circuit; the output end of the electrically tunable dielectric oscillator is connected with the input end of the amplifier and is also connected with the input end of the coupler; the output end of the coupler is connected with the input end of a first filter, and the output end of the first filter is connected with the second input end of the sampling phase discriminator; the output end of the amplifier is connected with the input end of the second filter.
2. The low phase noise phase-locked dielectric oscillator of claim 1, wherein said pulse-forming circuit input is connected to a reference signal input having a frequency of 60MHz, said pulse-forming circuit generating sampling pulses having a repetition frequency of 60 MHz.
3. The low phase noise phase-locked dielectric oscillator of claim 1, wherein said first filter and said second filter are low pass filters.
4. The low phase noise phase-locked dielectric oscillator of claim 1, wherein said control power supply circuit includes a DC/DC converter,
the DC/DC converter is connected with a power supply voltage input with the voltage of +12V, and outputs the power supply voltage with the voltage of +5V to the radio frequency link.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022866453.6U CN213402977U (en) | 2020-12-03 | 2020-12-03 | Low-phase-noise phase-locked dielectric oscillator |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202022866453.6U CN213402977U (en) | 2020-12-03 | 2020-12-03 | Low-phase-noise phase-locked dielectric oscillator |
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| CN213402977U true CN213402977U (en) | 2021-06-08 |
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| CN202022866453.6U Active CN213402977U (en) | 2020-12-03 | 2020-12-03 | Low-phase-noise phase-locked dielectric oscillator |
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