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Anti-seismic constant temperature low phase noise phase-locked reference source

A low-phase noise, reference source technology, applied in the field of phase-locked reference sources, can solve the problems of wide operating temperature, inability to meet seismic resistance, and low phase noise at the same time, and achieve improved phase noise indicators, compact structure, and less debugging workload. Effect

Active Publication Date: 2018-05-15
NO 54 INST OF CHINA ELECTRONICS SCI & TECH GRP
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The currently used 100MHz phase-locked constant temperature crystal oscillator cannot meet the requirements of shock resistance, wide operating temperature and low phase noise at the same time

Method used

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  • Anti-seismic constant temperature low phase noise phase-locked reference source
  • Anti-seismic constant temperature low phase noise phase-locked reference source
  • Anti-seismic constant temperature low phase noise phase-locked reference source

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Embodiment Construction

[0015] refer to Figure 1 to Figure 3 , the present invention consists of a filter 1, a first-stage amplifier 2, a frequency multiplier 3, a splitter 4, a switch 7, a coupler 9, a second-stage amplifier 10, a digital phase-locked loop circuit 5, and a pulse phase-locked loop circuit 6 and constant temperature SAW oscillator 8, figure 1 It is the electric principle block diagram of the embodiment of the present invention, and the embodiment is according to figure 1 Connect the lines. Among them, the filter 1 filters and outputs the 10MHz reference source signal provided by the terminal. The filter 1 of the embodiment is made of a commercially available LC filter; the first-stage amplifier 2 saturates and amplifies the filtered 10MHz reference signal to improve the 10MHz reference signal. For the dynamic range of the signal, the first-stage amplifier 2 of the embodiment adopts commercially available dedicated amplifier MSA-0686 to make; the function of the frequency multiplier...

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Abstract

The invention discloses an anti-seismic constant-temperature low-phase-noise phase-locked reference source, which relates to the phase-locked technology of the reference source of the radio frequency link in the communication field. It is composed of filters, amplifiers, frequency multipliers, splitters, digital phase-locked loop circuits, pulse phase-locked loop circuits, switches, constant temperature SAW oscillators, couplers and other components. It performs switching control between digital phase-locked loop circuit and pulse phase-locked loop circuit through single-chip microcomputer, and gives an alarm for loss of lock. The anti-seismic and low-phase-noise phase-locking purpose is realized by a digital phase-locked loop circuit, a pulse phase-locked loop circuit, a switch and an SAW oscillator. The invention has the advantages of shock resistance, wide working temperature, low phase noise, low spurious, low harmonic, high degree of integration, simple structure, stable and reliable performance, etc., can work normally in harsh environments, and is especially suitable as an airborne Phase-locked reference source for communication RF links.

Description

technical field [0001] The invention relates to a phase-locking technology of a reference source of a radio frequency link in the communication field, and is particularly suitable as a phase-locking reference source of an airborne communication radio frequency link. Background technique [0002] Airborne communication radio frequency links use Ku and Ka frequency bands. If BUC and BDC directly use the 10MHz reference source signal provided by the terminal for phase locking, the phase noise index cannot meet the system index requirements. In order to meet the airborne requirements, the phase-locked reference source of the RF link needs to have the characteristics of shock resistance, wide operating temperature, low phase noise, low spurious, low harmonics, high degree of integration, simple structure, stable and reliable performance, etc. The currently used 100MHz phase-locked constant temperature crystal oscillator cannot meet the requirements of shock resistance, wide opera...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H03L7/08H03L7/085H03L7/093
CPCH03L7/0805H03L7/085H03L7/093H03L2207/10
Inventor 李新陈焕东
Owner NO 54 INST OF CHINA ELECTRONICS SCI & TECH GRP
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