Wide-band high-speed frequency hopping frequency synthesizer and working method thereof

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 circuits and few applications, and achieve the effects of simple circuits, high integration, and short frequency conversion time.

Active Publication Date: 2016-03-16
SHAANXI FENGHUO ELECTRONICS
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  • Abstract
  • Description
  • Claims
  • Application Information

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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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  • Wide-band high-speed frequency hopping frequency synthesizer and working method thereof
  • Wide-band high-speed frequency hopping frequency synthesizer and working method thereof
  • Wide-band high-speed frequency hopping frequency synthesizer and working method thereof

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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 wireless communication equipment field and discloses a wide-band high-speed frequency hopping frequency synthesizer and a working method thereof. The output end of a first oscillator is connected with the reference frequency input end of a phase-locked loop circuit, the input end of a first DDS and the input end of a second DDS; the output end of the phase-locked loop circuit is connected with the input end of an active loop filter; the output end of the active loop filter is connected with the input end of a voltage-controlled oscillator; the output end of the voltage-controlled oscillator is connected with the local frequency input end of an IQ modulator; the output end of the first DDS is connected with the input end of a first filter; the output end of the first filter is connected with the I-path signal input end of the IQ modulator; the output end of the second DDS is connected with the input end of a second filter; the output end of the second filter is connected with the Q-path signal input end of the IQ modulator; and the output end of the IQ modulator is connected with the radio frequency input end 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, DirectDigitalSynthesizer) 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 l...

Claims

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Application Information

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Patent Type & Authority Applications(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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