Spectrum spreading device based on dual-port mixer

A spectrum expansion and mixer technology is applied in the field of frequency expansion of terahertz band spectrum analyzers, which can solve the problems of high frequency conversion loss, unfavorable small signal measurement, and reduce the sensitivity of the test system, and achieve the effect of reducing frequency conversion loss.

Pending Publication Date: 2021-03-26
SOUTHEAST UNIV
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AI Technical Summary

Problems solved by technology

For example, the harmonic mixer in the WR3.4 band (220-325GHz), its frequency conversion loss may be as high as 40dB or more, which will greatly reduce the sensitivity of the test system, which is not conducive to the measurement of small signals

Method used

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  • Spectrum spreading device based on dual-port mixer

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Embodiment Construction

[0015] The present invention will be further explained below in conjunction with the accompanying drawings.

[0016] Such as figure 1 As shown, a spectrum expansion device based on a two-port mixer includes an input duplexer 1, a local oscillator frequency multiplier 2, a local oscillator filter 3, a local oscillator amplifier 4, an output duplexer 5 and a terahertz doubler Port mixer 6. The input duplexer 1 is used to receive the local oscillator signal output by the spectrum analyzer, and pass the local oscillator signal through the local oscillator frequency multiplier 2 in the local oscillator channel 7, the local oscillator filter 3, the local oscillator amplifier 4 and the output dual The terahertz dual-port mixer 6 provides a high-frequency local oscillator signal after the mixer 5 . The terahertz dual-port mixer 6 is used to receive the terahertz signal from the device under test, and down-convert the terahertz signal to an intermediate frequency signal through the f...

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Abstract

The invention discloses a spectrum spreading device based on a dual-port mixer. The spectrum spreading device comprises an input duplexer, a local oscillation frequency multiplier, a local oscillationfilter, a local oscillation amplifier, an output duplexer and a terahertz dual-port mixer. The input duplexer is used for receiving a local oscillation signal output by the frequency spectrograph, and providing a high-frequency local oscillation signal for the terahertz dual-port frequency mixer after the local oscillation signal sequentially passes through the local oscillation frequency multiplier, the local oscillation filter, the local oscillation amplifier and the output duplexer in the local oscillation channel. The terahertz dual-port mixer is used for receiving a terahertz signal fromequipment to be tested, and down-converting the terahertz signal into an intermediate frequency signal through a frequency local oscillator signal; and the output duplexer transmits the intermediatefrequency signal to the frequency spectrograph for analysis and display through the intermediate frequency path and the input duplexer. The terahertz waveband frequency spectrograph frequency expansion device provided by the invention has extremely low frequency conversion loss, and can significantly increase the dynamic range of signal measurement of the frequency spectrograph.

Description

technical field [0001] The invention belongs to the field of frequency extension of a terahertz band spectrum analyzer, in particular to a terahertz band down-conversion receiver. Background technique [0002] With the requirements of modern system applications and the development of device technology, more and more applications are expanding to the high-end millimeter wave and terahertz frequency bands. The terahertz band (frequency>0.1THz) is extremely rich in spectrum resources due to its high frequency. For example, only the G band (140-220GHz) has a bandwidth of 80GHz, and the spectrum resources far exceed that of the microwave frequency band. Testing equipment is the basis for carrying out related scientific and product research. However, testing equipment and instruments in the terahertz band are extremely expensive, and it is of great significance to carry out technical research in related fields. [0003] Electrical signal measurement equipment usually includes ...

Claims

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Application Information

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IPC IPC(8): H03D7/16
CPCH03D7/16
Inventor 郭健
Owner SOUTHEAST UNIV
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