A X-band ultra-high-speed frequency hopping source

Abstract

The invention belongs to microwave technology and relates to an X-band ultra-high-speed frequency hopping source. The X-band ultra-high-speed frequency hopping source of the present invention includes a DDS module, a local oscillator phase-locked loop and a frequency-mixing frequency multiplication chain. Wherein, the DDS module is composed of a DDS and a frequency reference phase-locked loop, and the frequency mixing and multiplication chain includes a first band-pass filter, a first frequency multiplier, a second band-pass filter, a mixer, The third bandpass filter, the second frequency multiplier and the fourth bandpass filter, the frequency reference phase-locked loop is connected with the DDS to form a DDS module, and the DDS module is connected to the first bandpass of the frequency mixing and multiplication link After passing through the first frequency multiplier and the second band-pass filter in sequence, the filter is connected with the mixer. The local oscillator phase-locked loop is also connected to a mixer connected to a third bandpass filter, a second frequency multiplier and a fourth bandpass filter connected in sequence. The invention can realize nanosecond-level frequency hopping, good harmonic spuriousness, low phase noise, and adjustable X-band output frequency range.

Description

A X-band ultra-high-speed frequency hopping source technical field The invention belongs to microwave technology and relates to an X-band ultra-high-speed frequency hopping source. Background technique The frequency hopping speed mainly depends on the microwave frequency source. There have been some reports on domestic research on X-band frequency sources. The X-band frequency source developed by Xi’an 206 adopts the method of direct synthesis and mixing phase-locking, directly phase-locks the VCO in the X-band, and the frequency hopping time is 10us; The 10th Institute uses harmonic mixing phase-locking technology to realize the X-band frequency source, and the frequency hopping time is 20us; the X-band frequency synthesizer developed by China Power Group 38 adopts the DDS+harmonic mixing+frequency multiplication scheme, and the frequency hopping time is 1.5us; Zheng Xiuyun from the University of Electronic Science and Technology of China explored the scheme of multiple ...

AI Technical Summary

Problems solved by technology

The disadvantage of the above scheme is that the frequency hopping time is long, on the order of microseconds, and the method of frequency mixing is adopted at the same time, which is bulky, rich in harmonic spectrum, and difficult to filter out.

This type of frequency hopping technology is only suitable for large ground or airborne radars due to its bulky size

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