本文選題：移相器 + 延遲線(xiàn)　； 參考：《南京理工大學(xué)》2015年碩士論文

【摘要】：移相器與延遲線(xiàn)都是微波控制電路,其中移相器通過(guò)控制微波相位,使其在0-360。內(nèi)變化,從而達(dá)到控制微波波束發(fā)射方向的目的,而延遲線(xiàn)則控制微波以整波長(zhǎng)為基本單位變化。目前,移相器與延遲線(xiàn)廣泛應(yīng)用于雷達(dá)系統(tǒng)、微波通訊、電子對(duì)抗與衛(wèi)星技術(shù)等領(lǐng)域。隨著微波領(lǐng)域相關(guān)技術(shù)的進(jìn)步,微波控制電路正向著寬帶化、高功率、小型化與集成化的方向發(fā)展。本論文主要開(kāi)展了寬帶小型化移相延遲電路的研究,主要內(nèi)容如下：1.本文設(shè)計(jì)了一款L波段寬帶高功率四位數(shù)字式移相器。設(shè)計(jì)過(guò)程中,首先討論了如何根據(jù)功率容量選擇合適的PIN二極管；接著在移相單元中利用對(duì)稱(chēng)八分之一波長(zhǎng)開(kāi)路、短路支節(jié),四分之一波長(zhǎng)阻抗變換原理對(duì)開(kāi)關(guān)線(xiàn)型移相結(jié)構(gòu)進(jìn)行了改進(jìn),以實(shí)現(xiàn)寬帶性能。實(shí)物測(cè)試結(jié)果表明,移相器在23.9%帶寬內(nèi)回波損耗基本大于15.5 dB,與仿真結(jié)果較為吻合。2.結(jié)合低溫共燒陶瓷(LTCC)工藝與基片集成波導(dǎo)(SIW)結(jié)構(gòu),設(shè)計(jì)了一款X波段的新型延遲線(xiàn)。由于利用LTCC多層結(jié)構(gòu)來(lái)設(shè)計(jì)小型化延遲線(xiàn),電路中傳輸線(xiàn)多次折疊,給匹配帶來(lái)了很大的困難。利用四分之一波長(zhǎng)阻抗變換原理,本文提出了兩種改善匹配的電路實(shí)現(xiàn)方式,并在設(shè)計(jì)過(guò)程中利用其中一種建立了仿真模型。仿真結(jié)果表明,延遲線(xiàn)在9.5-10.5 GHz頻帶內(nèi)回波損耗大于18 dB,驗(yàn)證了設(shè)計(jì)方法的可行性。
[Abstract]:Both the phase shifter and the delay line are microwave control circuits, in which the phase shifter controls the microwave phase and makes the phase shifter range from 0 to 360. In order to control the transmitting direction of the microwave beam, the delay line controls the microwave to change in integral wavelength as the basic unit. At present, phase shifter and delay line are widely used in radar system, microwave communication, electronic countermeasure and satellite technology. With the development of microwave technology, microwave control circuit is developing towards wideband, high power, miniaturization and integration. In this paper, the research of broadband miniaturized phase shift delay circuit is carried out, the main contents are as follows: 1. In this paper, a L-band high-power four-bit digital phase shifter is designed. In the design process, we first discuss how to select the appropriate PIN diode according to the power capacity, and then use the symmetrical 1/8 wavelength open circuit in the phase-shifting unit. The principle of 1/4 wavelength impedance transform is used to improve the phase shifting structure of the switch line to realize the wideband performance. The physical test results show that the echo loss of the phase shifter is more than 15.5 dB in 23.9% bandwidth, which is in good agreement with the simulation results. A new type of X-band delay line was designed by combining the low temperature co-fired ceramic (LTCC) process with the substrate integrated waveguide (SIW) structure. Because of the use of LTCC multi-layer structure to design miniaturized delay lines and multiple folding of transmission lines in the circuit, it is very difficult to match. Based on the principle of 1/4 wavelength impedance transform, this paper presents two kinds of circuit realization ways to improve the matching, and establishes the simulation model by using one of them in the design process. The simulation results show that the echo loss of the delay line in the 9.5-10.5 GHz band is greater than 18 dB, which verifies the feasibility of the design method.
【學(xué)位授予單位】：南京理工大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類(lèi)號(hào)】：TN623

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本文編號(hào)：1918021