本文選題：環(huán)行器 + 微帶線　； 參考：《杭州電子科技大學(xué)》2015年碩士論文

【摘要】：本文采用釔鐵石榴石(YIG)薄膜材料設(shè)計(jì)了一種工作在Ku波段的微帶線環(huán)行器,并對(duì)其進(jìn)行了仿真優(yōu)化。傳統(tǒng)的環(huán)行器一般采用帶狀線結(jié)構(gòu),但是隨著現(xiàn)代微波集成電路廣泛采用,要求環(huán)行器要向小型化、集成化方向發(fā)展,同時(shí)在性能上要求損耗小、頻帶寬,并且要滿足低成本、批量生產(chǎn)的商業(yè)要求。因此,開展微帶線環(huán)行器的研究具有重要意義。本文主要做了以下幾點(diǎn)工作。(1)對(duì)電磁場(chǎng)理論、微帶線理論以及環(huán)行器的相關(guān)理論進(jìn)行了分析和整理,得出了微帶線結(jié)構(gòu)中電磁波處于準(zhǔn)TEM波形式、S參數(shù)的推導(dǎo)方法、負(fù)載匹配的原理及方法;(2)根據(jù)理論以及工藝情況設(shè)計(jì)了工作在Ku波段的環(huán)行器的初步結(jié)構(gòu);(3)從設(shè)計(jì)參數(shù)和阻抗匹配兩方面對(duì)環(huán)行器進(jìn)行仿真研究,得出環(huán)行器的中心頻率隨著中心結(jié)半徑、薄膜厚度、外加磁場(chǎng)強(qiáng)度、磁化半徑的增大而減小,并在波端口高度和寬度分別在4h和2~8w、耦合角為0.3、凹槽深度為基片厚度的80%~90%時(shí)有較好環(huán)行效果,采用指數(shù)漸變線匹配可以取得較大的工作帶寬;(4)根據(jù)設(shè)計(jì)尺寸結(jié)合真空鍍膜以及光刻工藝制作出器件實(shí)物,并進(jìn)行了初步測(cè)試。本文最終設(shè)計(jì)出了工作在Ku波段的微帶線環(huán)行器,其最小插入損耗為0.5dB、最大隔離度為40dB、最小電壓駐波比為1.05、相對(duì)帶寬達(dá)10%,體積小于10mm×10mm×3mm,滿足小型化的要求。根據(jù)本文設(shè)計(jì)的微帶線環(huán)行器,相關(guān)的組裝與測(cè)試工作已經(jīng)展開,文中關(guān)于薄膜環(huán)行器的一些結(jié)論及設(shè)計(jì)結(jié)果,可以為今后小型化環(huán)行器的設(shè)計(jì)提供依據(jù)。
[Abstract]:In this paper, a microstrip circulator working in Ku-band is designed and optimized by using yttrium iron garnet (YIG) thin film material. The traditional circulators generally use banded line structure, but with the wide adoption of modern microwave integrated circuits, the circulators should be miniaturized and integrated, and the performance of the circulators should be reduced, bandwidth and low cost should be satisfied. Commercial requirements for mass production. Therefore, the research of microstrip circulator is of great significance. In this paper, the theory of electromagnetic field, the theory of microstrip line and the theory of circulator are analyzed and arranged, and the derivation method of the electromagnetic wave in the form of quasi TEM wave in the structure of microstrip line is obtained. The principle and method of load matching are as follows: according to the theory and technology, the preliminary structure of the Ku-band circulator is designed. The design parameters and impedance matching of the circulator are simulated and studied. It is concluded that the central frequency of the circulator decreases with the increase of the central junction radius, the thickness of the film, the intensity of the external magnetic field and the magnetization radius. When the height and width of the wave port are 4 h and 2 ~ 8 ws respectively, the coupling angle is 0.3, and the depth of the groove is 80 ~ 90, the circular effect is better when the depth of the groove is the thickness of the substrate. A large working bandwidth can be obtained by using exponential gradient line matching. According to the design size and vacuum coating and photolithography, the device object is fabricated, and the preliminary test is carried out. In this paper, a Ku-band microstrip circulator is designed. The minimum insertion loss is 0.5 dB, the maximum isolation is 40 dB, the minimum voltage standing wave ratio is 1.05, the relative bandwidth is 10, and the volume is smaller than 10mm 脳 10mm 脳 3mm, which meets the requirement of miniaturization. According to the microstrip line circulator designed in this paper, the related assembly and testing work has been carried out. Some conclusions and design results of the thin film circulator can provide the basis for the design of miniaturized circulators in the future.
【學(xué)位授予單位】：杭州電子科技大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：TM277;TN621

【參考文獻(xiàn)】

相關(guān)期刊論文 前1條

1 孫延龍;張萬里;吳瞳;彭斌;;Ka波段小型化自偏置微帶環(huán)行器的設(shè)計(jì)與仿真[J];磁性材料及器件;2012年03期

相關(guān)碩士學(xué)位論文 前1條

1 陳寧;X波段寬帶微帶隔離器環(huán)行器組件仿真設(shè)計(jì)和實(shí)現(xiàn)[D];電子科技大學(xué);2011年

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本文編號(hào)：1877611