本文關(guān)鍵詞：W波段調(diào)頻連續(xù)波雷達(dá)收發(fā)前端　出處：《電子科技大學(xué)》2014年碩士論文　論文類型：學(xué)位論文

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【摘要】：W波段屬于毫米波波段中的大氣窗口頻段,該波段的收發(fā)前端電路研究一直是毫米波應(yīng)用領(lǐng)域的熱點課題。收發(fā)前端是微波毫米波雷達(dá)電路與系統(tǒng)中的關(guān)鍵組件,對系統(tǒng)性能有著舉足輕重的影響。本文的主要工作就是對一種W波段雷達(dá)收發(fā)前端電路進(jìn)行了設(shè)計和實現(xiàn)。本文分析了毫米波雷達(dá)收發(fā)前端的相關(guān)核心理論,研究了調(diào)頻連續(xù)波體制雷達(dá)的基本結(jié)構(gòu)和工作原理,根據(jù)理論和本文的需求,提出了多個腔體結(jié)構(gòu)的一發(fā)兩收W波段調(diào)頻連續(xù)波雷達(dá)收發(fā)前端的設(shè)計方案。論文的工作主要體現(xiàn)在以下幾個方面:首先,分別對W波段和Ka波段的兩種形式的微帶線-波導(dǎo)探針過渡進(jìn)行了分析和設(shè)計,并且應(yīng)用到了收發(fā)前端電路中;然后,分析了微帶線和波導(dǎo)結(jié)構(gòu)的毫米波帶通濾波器的設(shè)計方法,設(shè)計了一款平行耦合微帶線濾波器,并提出了一種新穎的將波導(dǎo)E面金屬膜片濾波器和Tee型功分器相結(jié)合的結(jié)構(gòu),在不影響濾波性能的基礎(chǔ)上節(jié)省了空間。該結(jié)構(gòu)應(yīng)用于三倍頻器模塊和二倍頻器模塊之間,以實現(xiàn)對三倍頻器的基波和其他諧波的抑制;其次,對于系統(tǒng)電路的各個有源部件,選用了符合系統(tǒng)需求的MMIC芯片,提高了系統(tǒng)電路的性能;再次,對收發(fā)前端系統(tǒng)電路各個腔體的具體結(jié)構(gòu)和電路板進(jìn)行了設(shè)計和繪制,滿足了技術(shù)指標(biāo)對于整體尺寸和接口位置的要求;最后,完成了對收發(fā)前端電路各個模塊的組裝、調(diào)試和測試。經(jīng)過調(diào)試和測試,達(dá)到了以下主要技術(shù)指標(biāo):發(fā)射機:發(fā)射功率20.17d Bm-20.25dBm,帶內(nèi)波紋≤3%;接收機:IQ信號幅度不一致性≤1dB,相位不一致性≤8°。
[Abstract]:The W band belongs to the atmosphere window frequency band in the millimeter wave band. The research of transceiver front-end circuit in this band has been a hot topic in millimeter-wave application field. The transceiver front-end is the key component of microwave millimeter-wave radar circuit and system. The main work of this paper is to design and implement a W-band radar transceiver front-end circuit. This paper analyzes the core theory of millimeter-wave radar transceiver front-end. The basic structure and working principle of FM CW radar are studied, according to the theory and the demand of this paper. In this paper, a design scheme of the transceiver front of multi-cavity structure is presented. The main work of this paper is as follows: first. Two kinds of microstrip wire-waveguide probe transition in W band and Ka band are analyzed and designed, and applied to the transceiver front-end circuit. Then, the design method of millimeter wave bandpass filter with microstrip line and waveguide structure is analyzed, and a parallel coupled microstrip line filter is designed. A novel structure combining waveguide E-plane metal diaphragm filter with Tee type power divider is proposed. The structure is applied between the tripler module and the doubler module to suppress the fundamental wave and other harmonics of the tripler. Secondly, for each active component of the system circuit, the MMIC chip is selected to meet the system requirements, which improves the performance of the system circuit. Thirdly, the specific structure and circuit board of each cavity of the transceiver front-end circuit are designed and drawn, which meet the requirements of the technical specifications for the overall size and interface position; Finally, the module of transceiver front-end circuit is assembled, debugged and tested. The main technical specifications are achieved as follows: transmitter: transmitting power 20.17d Bm-20.25dBm, band ripple 鈮，

本文編號：1388613