Efficient broadband solid-state source based on waveguide transmission line of 0.5 THz-0. 75THz and working method thereof

Abstract

The invention provides a broadband efficient solid-state source based on a waveguide transmission line of 0.5 THz-0. 75 THz and a working method of the broadband efficient solid-state source. According to the scheme, the platformization design of a microwave signal source doubling frequency source module is adopted, a *2 *3 *3 *3 54-time frequency multiplication technical route is provided, a third harmonic frequency multiplication scheme is adopted in the last stage, and high frequency multiplication efficiency is achieved. According to the scheme, the frequency doubler amplifier in the driving link adopts a multi-balance design, so that the harmonic suppression of the frequency doubler is improved; wherein the frequency tripler A and the frequency tripler B are arranged in the link; a technical route of combining an orthogonal coupling structure and a space frequency multiplication synthesis structure is adopted, the output power of spurious signals is also reduced, the generation ofthe whole 0.5 THz-0. 75THz broadband, high power and high signal quality is effectively ensured, and meanwhile, the problem of lack of a high-frequency-band power amplifier is solved.

Description

technical field [0001] The disclosure relates to the technical field of microwave solid-state source design, in particular to a 0.5THz-0.75THz broadband high-efficiency solid-state source based on a waveguide transmission line and a working method thereof. Background technique [0002] The statements in this section merely provide background information related to the present disclosure and do not necessarily constitute prior art. [0003] The 0.5THz-0.75THz frequency band signal is an important application frequency band for terahertz communication, radar, meteorological remote sensing, and deep space exploration. How to realize the generation of high-power signals in the 0.5THz-0.75THz frequency band with such a wide bandwidth, and at the same time have high signal quality, is a technical problem that needs to be solved urgently. At present, the generation of solid-state signals in the 0.5THz-0.75THz frequency band can be divided into high-order harmonic frequency multipl...

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Problems solved by technology

[0004] The inventor found that the high-order frequency multiplication scheme can reduce the frequency of the driving signal, and the entire frequency multiplication link is easier to realize. For example, if the 5th harmonic frequency multiplication scheme is adopted, in order to generate a signal of 0.5THz to 0.75THz, the frequency of the driving signal is From 0.1THz to 0.15THz, the increase in the number of harmonics can further reduce the frequency of the driving signal, and the difficulty of realizing the entire link is greatly reduced, but a problem brought about by this technical route is that the efficiency of the signal generation of the entire link Low, and limited by the compression point of the frequency multiplier, the output power is small

The technical route of low-order frequency multiplication mainly refers to the technical route that the final frequency multiplier adopts 2 or 3 times of frequency multiplication. At present, the typical solution is to use 2 times of frequency multiplication, and the frequency of the driving signal is 0.25THz~0.375THz , it is extremely difficult to generate high-power signals in the 0.25THz-0.375THz frequency band without a broadband power amplifier, and innovative breakthroughs are needed; compared with the high-order harmonic multiplication scheme, the low-order second harmonic The high-frequency scheme has high efficiency, but the requirements for driving signals are high, which is not only reflected in the increase of frequency, but also due to the increase in the number of links, the problem of signal quality deterioration

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