https://scholars.lib.ntu.edu.tw/handle/123456789/122586
標題: | 小型化集總元件傳輸線 Miniaturized lumped-element transmission line |
作者: | 呂俊億 Lu, Chun-Yi |
關鍵字: | 傳輸線;慢波因子;螺旋電感;修正等效T模型;威爾金森功率分配器;transmission line;slow wave factor;cmos;spiral inductance;modified-T model;Wilkinson power divider;LTCC | 公開日期: | 2006 | 摘要: | 為配合發展單晶片無線通訊收發系統,本研究將於矽基CMOS製程上,研發新式小型化集總元件傳輸線,可達成比傳統傳輸線模型(T模型或π模型)更大的頻寬,並以之為基礎,開發新式矽基小型化射頻及微波被動元件,以建立矽基無線收發單晶片之關鍵元組件技術。本論文提出將傳輸線修正T型等效電路以IC製程來實現的方法,在CMOS 0.18製程中,根據所需要的傳輸線參數,利用對稱型平面電感及平行板電容來實現修正T型等效電路中所需要的電路元件,並且以CMOS 018製程實際製作了一條特性組抗50Ω,電氣長度在5.25GHz為90度的集總元件等效傳輸線,其操作頻寬可達11GHz,而電路面積僅為傳統設計的15.57 %。而為了達到更進一步縮小電路面積的目的,亦以一條高阻抗集總元件等效傳輸線,利用於輸出埠輸入埠上並聯電容的方式,等效為一條特性組抗為50Ω的四分之一波長等效傳輸線共振器,其電路面積僅為傳統設計的14.14 %。又為了更進一步提升集總元件等效傳輸線的頻寬,將原本的特性組抗50Ω電氣長度為90度的集總元件等效傳輸線,改用特性組抗50Ω,電氣長度為2度的集總元件等效傳輸線單元電路串接而成。此設計的優點是可以將對稱型平面電感的共振頻率移至高頻,藉此增加所設計傳輸線的頻寬,並以CMOS 018製程實際製作,其操作頻寬可達20GHz,而電路面積僅為傳統設計的28.45 %。最後,並將所研製之集總元件等效傳輸線,應用於小型化矽基威爾金森功率分配器的設計。 In order to cooperate with the development of system on chip for wireless transceiver systems, the miniature Si-based lumped-element equivalent transmission line is proposed, which may achieve much wider bandwidth than the conventional T- or models of transmission lines. Based on the proposed lumped-element equivalent transmission lines, novel miniature Si-based RF/microwave passive components are also developed, so as to establish the key component technology for Si-based single chip wireless transceivers. In this thesis, we propose the implementation method of modified-T equivalent circuit of transmission line with IC process. In CMOS 0.18 process, based on the required parameters of transmission line, the symmetrical planar spiral (SPS) structure and parallel-plate capacitor are utilized to realize the circuit parameters needed in T-modified equivalent circuit. A Si-based equivalent transmission line with characterization impedance 50 Ω and electrical length of 90o at 5.25GHz is implemented using CMOS 0.18 process, and the operation bandwidth is up to 11 GHz with only 15.57 % the size of conventional designs. The size of proposed equivalent transmission line can be further reduced by adding additional shunt capacitors at the input and output ports of a high impedance equivalent transmission-line. A Si-based quarter-wavelength equivalent transmission line resonator of 50Ω is implemented, and its size is only 14.14 % that of the conventional designs. In order to further improve the bandwidth of proposed equivalent transmission line, the transmission line with characterization impedance of 50 Ω and electrical length of 90o at 11 GHz is implemented alternatively by a cascade of equivalent transmission line unit-cells with 2o electrical length. In this way, the self resonance frequency of the spiral inductor can be shifted to higher frequencies such that the bandwidth of equivalent transmission line becomes larger. Specifically, a lumped-element equivalent transmission line of 50Ω and 90o electrical length at 5.25GHz is implemented in CMOS 0.18 process, and a bandwidth of 20GHz is achieved. Finally, the design of miniature Si-based Wilkinson power dividers based on the proposed lumped-element equivalent transmission line are demonstrated. |
URI: | http://ntur.lib.ntu.edu.tw//handle/246246/58926 | 其他識別: | zh-TW |
顯示於: | 電信工程學研究所 |
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