Terahertz frequency synthesizer realized by adopting CMOS process

Abstract

The invention discloses a terahertz frequency synthesizer realized by adopting a CMOS process, which comprises a voltage controlled oscillator generating terahertz LO signals, a first-stage injection-locked frequency divider and a second-stage injection-locked frequency divider for frequency division, and a phase-locked loop for locking a reached set frequency, wherein the voltage controlled oscillator, the first-stage injection-locked frequency divider, the second-stage injection-locked frequency divider and the phase-locked loop are in serial connection sequentially; and the feedback output end of the phase-locked loop is connected with the feedback input end of the voltage controlled oscillator. According to the terahertz frequency synthesizer realized by adopting the CMOS process disclosed by the invention, the standard CMOS process is adopted for realization, the integration is high, the cost is low, mass production is facilitated, the limitation of poor working performance near a cutoff frequency of the CMOS process is overcome, and the design of the terahertz frequency synthesizer is realized.

Description

technical field [0001] The invention relates to a terahertz frequency synthesizer. In particular, it relates to a terahertz frequency synthesizer realized by CMOS technology. Background technique [0002] In recent years, high-speed wireless communication systems are constantly developing towards higher frequency, bandwidth, higher integration and lower cost. The terahertz frequency band (300GHz-3THz) is between microwaves and infrared rays. It is the only last spectrum interval in the electromagnetic spectrum that has not been fully studied and well utilized. Today, when communication frequency bands are increasingly scarce, the use of terahertz wave communication Technical research is of great significance. Terahertz wave communication technology is widely used in all aspects of life. Due to its unique properties and position in the spectrum, terahertz waves are widely used in communications, electronic countermeasures, radar, electromagnetic weapons, astronomy, medical ...

AI Technical Summary

Problems solved by technology

[0004] The reason why the traditional digital CMOS process technology has not been fully considered in the application of ultra-high frequency circuits (frequency exceeding 100GHz) is that the CMOS oscillator circuit is limited by the cutoff frequency of the device (f T ) and maximum oscillation frequency (f max )limits

However, with the development of process technology, the size of the device is continuously reduced, and the operating frequency of the device is continuously increased, so that the cut-off frequency of the field effect transistor can be close to or even reach the frequency range of terahertz under the CMOS process, so that the CMOS process can be used to realize the frequency range of the terahertz wave. It is possible to operate the circuit under

[0005] The terahertz wave circuit realized by CMOS process has been studied, but because the CMOS process device

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