High performance frequency synthesizer

A frequency synthesizer, high-performance technology, applied in the direction of electrical components, etc., can solve the problems of many output signal spurs and low output frequency, and achieve the effects of wide application prospects, low spurs, and wide operating temperature range

Active Publication Date: 2017-05-10
CHENGDU SEEKCON MICROWAVE COMM
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AI Technical Summary

Problems solved by technology

Direct digital frequency synthesizer adopts digital structure, so that DDS has the advantages of low phase noise, fast frequency switching speed, high resolution, small size, and low power consumption; but due to the circuit structure, the output signal has a lot of spurious, The output frequency is not high

Method used

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  • High performance frequency synthesizer

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Embodiment Construction

[0018] The present invention provides a high-performance frequency synthesizer, such as figure 1 As shown, it includes a power divider for dividing one input signal into two signal outputs; a direct frequency synthesis module that receives the output signal of the power divider and generates multiple independent low-phase noise frequency points as local oscillator signals according to the output signal And a direct digital frequency synthesis module that simultaneously receives the output signal of the power divider and outputs the intermediate frequency signal accordingly; it is used to receive the local oscillator signal and the intermediate frequency signal and mix the two signals to output low phase noise and fast frequency hopping signal Frequency mixing module; a switch filter module used to receive low phase noise and fast frequency hopping signals and filter the signal; used to receive and filter the output signal of the switch filter module for spectrum shifting and fi...

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Abstract

The invention discloses a high performance frequency synthesizer comprising a power divider; a direct frequency synthesis module which receives the output signal of the power divider and outputs a local oscillation signal and a direct digital frequency synthesis module which receives the output signal of the power divider and accordingly outputs an intermediate frequency signal; a frequency mixing module which is used for receiving the local oscillation signal and the intermediate frequency signal and performs frequency mixing of the two signals to output a low phase noise and fast frequency hopping signal; a switch filtering module which is used for receiving the output signal of the frequency mixing module and filtering the signal; a frequency multiplication module which is used for receiving and shifting the frequency spectrum of the signal outputted by filtration of the switch filtering module and finally expanding to the C-band to output frequency multiplication signal power; and an amplification module which is used for receiving and amplifying and adjusting the frequency multiplication signal power so as to adjust the power flatness in the whole band. Effective integration is performed by the mode of combining the two frequencies, and the output signal of the integrated frequency synthesizer is enabled to be low in phase noise, low in stray and fast in frequency hopping speed.

Description

technical field [0001] The invention relates to the field of wireless communication, in particular to a high-performance frequency synthesizer. Background technique [0002] The fast frequency source is an important part of the electronic transceiver, and the performance of the frequency source determines the optimal performance that the system can achieve. According to different synthesis methods, frequency synthesizers can be mainly divided into three types: direct frequency synthesis (DS), phase-locked frequency synthesis (PLL), and direct digital frequency synthesis (DDS). Great addition. The output frequency switching speed of direct frequency synthesis is fast and the noise is low; however, the circuit structure is complicated, the volume is large, the cost is high, and debugging is difficult, etc., and the direct frequency synthesis technology uses a large number of frequency conversion devices, which introduces a lot of nonlinear spurs, so , it is difficult to achi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03B28/00
CPCH03B28/00Y02D30/70
Inventor 孙科万鸣张意廖志雄徐伟陶莲娟蒋万兵刁鹏
Owner CHENGDU SEEKCON MICROWAVE COMM
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