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A broadband high-speed frequency hopping frequency synthesizer and its working method

A frequency synthesizer and frequency hopping frequency technology, applied in the direction of automatic power control, electrical components, etc., can solve the problems of complex lines and few applications, and achieve simple lines, high integration, and high phase noise and spurious indicators. Effect

Active Publication Date: 2019-03-29
SHAANXI FENGHUO ELECTRONICS
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  • Claims
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AI Technical Summary

Problems solved by technology

The multi-loop mixing chain method also requires fractional frequency division. To achieve a frequency conversion time of 100 μs, in principle, each loop must achieve a frequency conversion time of 100 μs. At the same time, due to the complexity of the circuit, there are few applications

Method used

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  • A broadband high-speed frequency hopping frequency synthesizer and its working method
  • A broadband high-speed frequency hopping frequency synthesizer and its working method
  • A broadband high-speed frequency hopping frequency synthesizer and its working method

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Embodiment Construction

[0040] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0041] An embodiment of the present invention provides a broadband high-speed frequency hopping frequency synthesizer, such as figure 1 As shown, the frequency synthesizer includes: a first oscillator 1, a phase-locked loop circuit 2, an active loop filter 3, a voltage-controlled oscillator 4, a first direct digital frequency synthesizer 5, a first filter 6. A second direct digital frequency synthesizer 7 , a second filter 8 and an IQ modulator 9 .

[0042] W...

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Abstract

The invention belongs to the field of radio communication equipment, and discloses a broadband high-speed frequency hopping frequency synthesizer and a working method, the output end of the first oscillator, the reference frequency input end of the phase-locked loop circuit, and the input of the first DDS and the second DDS The output terminal of the phase-locked loop circuit is connected with the input terminal of the active loop filter, the output terminal of the active loop filter is connected with the input terminal of the voltage-controlled oscillator, and the output terminal of the voltage-controlled oscillator is connected with the IQ The local oscillator frequency input end of the modulator is connected; the output end of the first DDS is connected with the input end of the first filter, and the output end of the first filter is connected with the I road signal input end of the IQ modulator; the output of the second DDS The terminal is connected with the input terminal of the second filter, and the output terminal of the second filter is connected with the Q signal input terminal of the IQ modulator; the output terminal of the IQ modulator is connected with the radio frequency input terminal of the phase-locked loop circuit.

Description

technical field [0001] The invention relates to the technical field of radio communication equipment, in particular to a broadband high-speed frequency hopping frequency synthesizer and a working method thereof. Background technique [0002] The output frequency of the broadband high-speed frequency hopping frequency synthesizer can generally reach hundreds of MHz to several GHz, and the frequency conversion time is within 100μs. [0003] In order to achieve 100μs frequency conversion time, the phase detection frequency should reach several MHz or dozens of MHz, but the output frequency interval is generally 25kHz. The technical methods include single-ring fractional frequency division, DDS (Direct Digital Synthesizer, Direct Digital Synthesizer) driving a single phase-locked loop or DDS interpolation phase-locked loop, and the earlier method of multi-ring mixing chain. [0004] The single-loop fractional frequency division circuit is simple, and there are many phase-locked...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H03L7/197
CPCH03L7/1974
Inventor 李关策周黎阳赵玉振鱼勇王斌蔡朝锋
Owner SHAANXI FENGHUO ELECTRONICS
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