本文選題：平面肖特基二極管　切入點(diǎn)：太赫茲　出處：《電子科技大學(xué)》2017年碩士論文

【摘要】：太赫茲頻域是一個(gè)有待全面開發(fā)的電磁波區(qū)域。二十一世紀(jì)初,越來越多的專家學(xué)者將其研究重心轉(zhuǎn)向太赫茲領(lǐng)域,促進(jìn)太赫茲技術(shù)走出實(shí)驗(yàn)室,轉(zhuǎn)化為現(xiàn)實(shí)生產(chǎn)力。目前太赫茲技術(shù)已在醫(yī)療、軍事、探測等領(lǐng)域顯現(xiàn)出巨大的應(yīng)用價(jià)值。在太赫茲系統(tǒng)中,混頻器作為收發(fā)前端的重要部件,主要功能為實(shí)現(xiàn)太赫茲頻譜的上下搬移,其性能與收發(fā)系統(tǒng)的實(shí)現(xiàn)密切相關(guān)。然而當(dāng)頻率升高至太赫茲,穩(wěn)定可靠的本振源較難獲得,因此諧波混頻器成為了一種切實(shí)可行的思路。本文將圍繞太赫茲混頻器開展研究,并進(jìn)行次諧波混頻器設(shè)計(jì)。本文采用兩種太赫茲電路設(shè)計(jì)方法,進(jìn)行了實(shí)踐、對(duì)比和改進(jìn)。440GHz次諧波混頻器采用基于單元電路的仿真方法,將電路結(jié)構(gòu)拆分成若干個(gè)特定功能的部件電路,分別對(duì)其優(yōu)化設(shè)計(jì),最終整合并進(jìn)行匹配設(shè)計(jì)。仿真設(shè)計(jì)工作由HFSS與ADS軟件聯(lián)合完成,采用Teratech的AP4/G2/0P64二極管芯片。仿真實(shí)現(xiàn):在射頻420~460GHz頻帶內(nèi)變頻損耗優(yōu)于10dB。隨后對(duì)其進(jìn)行了加工,并在不同本振條件下對(duì)其進(jìn)行了上變頻測試。測試結(jié)果表明:當(dāng)輸入本振222GHz,驅(qū)動(dòng)功率4.2mW時(shí)測試得雙邊帶變頻損耗在中頻20GHz帶寬內(nèi)均優(yōu)于15dB,可用帶寬較寬。中頻18GHz帶寬內(nèi)均優(yōu)于13.7dB,最佳值11.5dB,且?guī)?nèi)平坦無諧振,與仿真結(jié)果趨勢一致。在此基礎(chǔ)上330GHz次諧波混頻器采用更先進(jìn)的基于全局電路的仿真方法,以傳輸線結(jié)構(gòu)為基礎(chǔ)建立完整的電路等效模型,使所有電路結(jié)構(gòu)都作為設(shè)計(jì)變量,直接進(jìn)行混頻器匹配設(shè)計(jì),并使用混頻器的整體指標(biāo)約束其行為。與前者采用相同的二極管芯片,仿真實(shí)現(xiàn):在射頻300~350GHz頻帶內(nèi)變頻損耗優(yōu)于7.7dB。對(duì)比發(fā)現(xiàn)基于全局電路的仿真方法設(shè)計(jì)優(yōu)勢明顯。太赫茲混頻器是太赫茲系統(tǒng)的重要組件,本文的研究工作將為太赫茲器件的設(shè)計(jì)提供經(jīng)驗(yàn)和啟發(fā)。
[Abstract]:Terahertz is an electromagnetic wave to the regional comprehensive development. At the beginning of twenty-first Century, more and more experts and scholars will be the focus of study of THz technology, promote the terahertz technology out of the laboratory into practical productive forces. The terahertz technology has been in the medical, military and other fields, the detection shows great application value in the terahertz system. The mixer, as an important component of front-end, main functions for the realization of terahertz spectrum shifting, the performance and Realization of transceiver system are closely related. However, when the frequency is increased to a stable and reliable source of terahertz, this is difficult to obtain, so a feasible method of harmonic mixer. This paper will carry out on terahertz mixer research and harmonic mixer design. In this paper, two design methods of terahertz circuits, the practice, comparison and improvement of.440 GHz harmonic mixer using simulation method based on unit circuit, the circuit structure is split into a plurality of circuit components specific function, respectively, to the optimal design, the final integration and matching design. The simulation design work done by HFSS and ADS software, using AP4/G2/0P64 diode chip Teratech. Simulation in RF 420~460GHz frequency band. Conversion loss is better than 10dB. then carries on the processing, the frequency test and the vibration in the different conditions. The test results show that: when the input of the vibration 222GHz, driving power of 4.2mW test with bilateral conversion loss were better than those in the intermediate frequency 20GHz bandwidth 15dB, wide bandwidth 18GHz bandwidth if. The best value is better than that of 13.7dB, 11.5dB, and flat band resonance, the trend is consistent with the simulation result. On the basis of 330GHz harmonic mixer using more advanced based on global power The simulation method of the road, the transmission line structure based on equivalent circuit model and the circuit structure are all as design variables, direct matching mixer design, the overall index constraint and use its behavior. To realize the simulation of mixer and the former uses diode chip, the same: in the RF 300~350GHz frequency band conversion loss is better than 7.7dB. contrast that advantage global circuit design based on simulation method is obvious. Terahertz mixer is an important component of terahertz system, the research work of this paper will provide experience and inspiration for the design of terahertz devices.

【學(xué)位授予單位】：電子科技大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：TN773

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本文編號(hào)：1711165