本文選題：非對稱共面波導(dǎo) + 二維頻域有限差分��； 參考：《大連海事大學(xué)》2014年博士論文

【摘要】：共面波導(dǎo)作為一種重要的平面?zhèn)鬏斁�,已應(yīng)用于微波、毫米波、亞毫米波、光學(xué)和高溫超導(dǎo)集成電路等領(lǐng)域,并已在一些電路中取代微帶線,在微波集成電路中占據(jù)著越來越重要的地位。非對稱共面波導(dǎo)是在共面波導(dǎo)的基礎(chǔ)上發(fā)展而成的一種新型傳輸線。相比共面波導(dǎo),非對稱共面波導(dǎo)中心導(dǎo)帶與兩側(cè)接地板之間的縫隙寬度是不同的,可以認(rèn)為是共面波導(dǎo)的一種推廣,更具有一般性和應(yīng)用靈活性。 雖然對非對稱共面波導(dǎo)的研究進(jìn)行了很多年了,但由于測試條件和實(shí)際應(yīng)用經(jīng)驗(yàn)限制,對于非對稱共面波導(dǎo)的理論分析和實(shí)際應(yīng)用研究仍處于發(fā)展階段。 為了對非對稱共面波導(dǎo)進(jìn)行理論分析,許多學(xué)者采用準(zhǔn)靜態(tài)的保角變換方法來進(jìn)行研究,但保角變換方法難以分析非對稱共面波導(dǎo)的頻域特性。雖然時(shí)域的方法(如時(shí)域有限差分或時(shí)域多分辨率分析)能分析非對稱共面波導(dǎo)的色散特性,但是由于受到精度所限,不能展現(xiàn)出非對稱共面波導(dǎo)的優(yōu)點(diǎn)。本文在前期研究的基礎(chǔ)上,將近似完全匹配層邊界應(yīng)用于二維頻域有限差分方法,使算法更加容易編程實(shí)現(xiàn),更加適合分析開放結(jié)構(gòu)的非對稱共面波導(dǎo)傳輸線。應(yīng)用改進(jìn)后的二維頻域有限差分方法對具有過孔的非對稱共面波導(dǎo)相位常數(shù)進(jìn)行了分析。由于直接應(yīng)用二維頻域有限差分方法計(jì)算傳輸線特性阻抗精度較差,提出了以一維波方程為插值函數(shù)的阻抗計(jì)算方法,提高了特性阻抗的計(jì)算精度。分析結(jié)果表明,非對稱共面波導(dǎo)具有比共面波導(dǎo)更優(yōu)的阻抗頻域特性。 不連續(xù)結(jié)構(gòu)(如彎曲結(jié)構(gòu),十字節(jié)等)是非對稱共面波導(dǎo)在實(shí)際應(yīng)用時(shí)不可避免的電路形式,因此詳細(xì)研究了非對稱共面波導(dǎo)彎曲結(jié)構(gòu)。本文將頻域有限差分方法和時(shí)域有限差分方法相結(jié)合,對非對稱共面波導(dǎo)彎曲結(jié)構(gòu)的模式轉(zhuǎn)換特性進(jìn)行了分析。通過分析比較直角、45。斜角和圓角三種不同的共面波導(dǎo)和非對稱共面波導(dǎo)彎曲結(jié)構(gòu),確定了非對稱共面波導(dǎo)彎曲結(jié)構(gòu)的模式間能量轉(zhuǎn)換更小,這就意味著非對稱共面波導(dǎo)比共面波導(dǎo)具有更低的傳輸損耗。為了驗(yàn)證這一結(jié)論,本文利用非對稱共面波導(dǎo)上c模和π模具有不同的場分布特性,設(shè)計(jì)了一種測試裝置并實(shí)際測試了各種彎曲結(jié)構(gòu)的傳輸特性�；谝陨涎芯�,本文最后提出了一種新型的共面波導(dǎo)彎曲結(jié)構(gòu),實(shí)驗(yàn)結(jié)果表明了這種新型的共面波導(dǎo)彎曲結(jié)構(gòu)抑制了模式間能量轉(zhuǎn)換,具有更小的傳輸損耗。
[Abstract]:As an important planar transmission line, coplanar waveguide has been used in microwave, millimeter wave, sub-millimeter wave, optical and high-temperature superconducting integrated circuit, and has been used to replace microstrip line in some circuits. Microwave integrated circuits play a more and more important role. Asymmetric coplanar waveguide is a new transmission line based on coplanar waveguide. Compared with the coplanar waveguide, the gap width between the central conduction band of the asymmetric coplanar waveguide and the two sides of the floor is different, which can be considered as a generalization of the coplanar waveguide and more general and flexible in application. Although the research on asymmetric coplanar waveguide has been carried out for many years, the theoretical analysis and practical application of asymmetric coplanar waveguide are still in the developing stage due to the limitation of testing conditions and practical application experience. For the theoretical analysis of asymmetric coplanar waveguides, many scholars use quasi-static conformal transformation method to study, but the conformal transformation method is difficult to analyze the frequency domain characteristics of asymmetric coplanar waveguides. Although time-domain methods (such as finite-difference time-domain or multi-resolution time-domain analysis) can analyze the dispersion characteristics of asymmetric coplanar waveguides, they cannot show the advantages of asymmetric coplanar waveguides due to their limited accuracy. On the basis of previous studies, this paper applies the approximate perfectly matched layer boundary to the 2-D finite-difference method in frequency domain, which makes the algorithm easier to program and more suitable for the analysis of asymmetric coplanar waveguide transmission lines with open structure. The phase constants of asymmetric coplanar waveguides with holes are analyzed by using the improved two-dimensional finite-difference method in frequency domain. Due to the poor precision of calculating the characteristic impedance of transmission line by using the 2-D finite difference method in frequency domain directly, an impedance calculation method with one-dimensional wave equation as the interpolation function is proposed, which improves the calculation accuracy of the characteristic impedance. The results show that asymmetric coplanar waveguides have better impedance frequency domain characteristics than coplanar waveguides. Discontinuous structure (such as bending structure, cross section, etc.) is the inevitable circuit form of asymmetric coplanar waveguide in practical application, so the bending structure of asymmetric coplanar waveguide is studied in detail. In this paper, the frequency domain finite difference method and the time domain finite difference method are combined to analyze the mode conversion characteristics of asymmetric coplanar waveguide bending structure. Through the analysis and comparison of the right angle 45. Three different bending structures of coplanar waveguide and asymmetric coplanar waveguide with oblique angle and circular angle are obtained. It is determined that the energy conversion between modes of the bending structure of asymmetric coplanar waveguide is smaller than that of unsymmetrical coplanar waveguide. This means that asymmetric coplanar waveguides have lower transmission losses than coplanar waveguides. In order to verify this conclusion, a testing device is designed and the transmission characteristics of various bending structures are tested by using the different field distribution characteristics of c mode and 蟺 mode on asymmetric coplanar waveguide. Based on the above research, a new kind of coplanar waveguide bending structure is proposed in this paper. The experimental results show that the new coplanar waveguide bending structure can suppress the energy conversion between modes and have a lower transmission loss.
【學(xué)位授予單位】：大連海事大學(xué)
【學(xué)位級別】：博士
【學(xué)位授予年份】：2014
【分類號】：TN814

【參考文獻(xiàn)】

相關(guān)期刊論文 前9條

1 張卉;王均宏;;奇模抑制孔縫陣列速度補(bǔ)償型彎曲共面波導(dǎo)[J];電波科學(xué)學(xué)報(bào);2009年02期

2 陳鵬;李曉明;房少軍;王鐘葆;;一種超寬帶非對稱共面波導(dǎo)-槽線轉(zhuǎn)接器的研究[J];電波科學(xué)學(xué)報(bào);2010年03期

3 李曉明;房少軍;付世強(qiáng);;一種非對稱共面波導(dǎo)相位補(bǔ)償彎曲結(jié)構(gòu)[J];電波科學(xué)學(xué)報(bào);2011年01期

4 陳鵬,房少軍;基于時(shí)域有限差分法計(jì)算共面波導(dǎo)的特性阻抗[J];大連海事大學(xué)學(xué)報(bào);2005年03期

5 陳鵬;房少軍;范木杰;付世強(qiáng);李曉明;;非對稱共面波導(dǎo)-槽線轉(zhuǎn)接器S參數(shù)的分析與計(jì)算[J];大連海事大學(xué)學(xué)報(bào);2009年01期

6 房少軍,王百鎖;面向CAD的非對稱共面波導(dǎo)模型及分析[J];電子學(xué)報(bào);2002年06期

7 陳鵬;房少軍;;利用時(shí)域有限差分法計(jì)算并分析非對稱共面波導(dǎo)色散特性[J];電子學(xué)報(bào);2006年09期

8 范木杰;房少軍;蘇曉宏;;一種新型非對稱共面波導(dǎo)濾波器的設(shè)計(jì)與仿真[J];太原理工大學(xué)學(xué)報(bào);2011年02期

9 張祺,周希朗,沈文輝;圓形金屬波導(dǎo)傳輸特性的2-D頻域有限差分法分析[J];微波學(xué)報(bào);2005年02期

相關(guān)博士學(xué)位論文 前1條

1 李曉明;非對稱共面波導(dǎo)等阻抗特性及其應(yīng)用的研究[D];大連海事大學(xué);2011年

，

本文編號：2078734