https://scholars.lib.ntu.edu.tw/handle/123456789/121493
Title: | 毫米波基板合成波導四乘四巴特勒矩陣之設計與量測 Design and Measurement of 4 x 4 Millimeter Wave SIW Butler Matrix |
Authors: | 陳志榮 Chen, Chih-Jung |
Keywords: | 毫米波;基板合成波導;微波量測;巴特勒矩陣;mm-wave;SIW;S-parameter;Butler matrix | Issue Date: | 2007 | Abstract: | 本論文使用Rogers RO4003® 8 mil厚板材製作3 dB和0 dB短槽耦合器以及四乘四巴特勒矩陣,電路結構均採用基板合成波導(SIW)。雖然它們是多埠元件,其多埠散射矩陣則係利用雙埠向量網路分析儀量測及TRL(thru-reflect-line)校準,並經適當計算予以重建。對每一待測物而言,重建之散射矩陣一方面可驗證其效能;另一方面則可提供其設計參數,方便設計其後續應用。 應用美商恩碩公司(Ansoft)HFSS®軟體觀察傳輸結構內電磁場分布,第二章重新檢視短槽耦合器之設計原理,並整理出明確設計公式,以預估元件尺寸作為HFSS®模擬最初的設定值。依據模擬結果,使用Rogers RO4003® 8 mil厚板材,分別製作3 dB和0 dB SIW短槽耦合器以及四成四SIW巴特勒矩陣。 為了量測短槽耦合器,於第三章討論使用雙埠向量網路分析儀量測完全對稱的四埠元件,並據此重建3 dB和0 dB SIW短槽耦合器之四埠散射矩陣。 於第四章則引進虛擬輔助負載概念,並配合使用雙埠向量網路分析儀量測和虛擬輔助負載,分別重建Mini-Circuits® D17I 17 dB三埠方向耦合器、DiTom® D3C2040三埠循環器和Narda® COF-2040四埠循環器之散射矩陣。 最後,於第五章配合虛擬輔助負載,發展出一套量測方法,重建四乘四SIW巴特勒矩陣之散射矩陣。 In this dissertation, a 3 dB short-slot coupler, a 0 dB short-slot coupler and a 4 x 4 Butler matrix are fabricated on Rogers RO4003® substrate with 8 mil thickness. These circuits are operated at 30 GHz using substrate integrated waveguide (SIW). Though they are multiport devices, their multiport scattering matrices can be reconstructed using two-port measurement of vector network analyzer and thru-reflect-line calibration. For each device under test (DUT), the reconstructed scattering matrix on the one hand verifies its characteristics, and on the other hand is advantageous for the design of the follow-on applications. With the aid of the HFSS® of Ansoft Corporation to visualize the field distributions, theory of the short-slot coupler is reviewed in Chapter 2. Explicit design formulas of 3 dB and 0 dB short-slot couplers are arranged to estimate the structure dimensions for the HFSS® simulations to begin with. According to the simulation results, SIW short-slot couplers of 0 dB and 3 dB and a 30 GHz 4 x 4 SIW Butler matrix are designed on Rogers RO4003® substrate with 8 mil thickness. For the measurement of short-slot couplers, the measurement of fully symmetric four-port network using two-port vector network analyzer is discussed in Chapter 3 to reconstruct the four-port S-matrices of the 3 dB and 0 dB SIW short-slot couplers. The concept of virtual auxiliary termination is introduced in Chapter 4 for the measurement of multiport DUT. The S-matrices of a Mini-Circuits® D17I 17 dB directional coupler, a DiTom® three-port circulator D3C2040 and a Narda® four-port circulator COF-2040 are then acquired accordingly from measurements using a two-port vector network analyzer and virtual auxiliary terminations. Finally, a measurement procedure is developed in Chapter 5 to acquire the eight-port S-matrix of a 4 x 4 SIW Butler matrix by exploiting the concept of virtual auxiliary termination. |
URI: | http://ntur.lib.ntu.edu.tw//handle/246246/58593 | Other Identifiers: | en-US |
Appears in Collections: | 電信工程學研究所 |
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ntu-96-D93942002-1.pdf | 23.31 kB | Adobe PDF | View/Open |
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