本論文將前人所提出之人工合成傳輸線推展至帶線結構，該人工合成傳輸線是利用近似集總元件與其不連續效應所構成。首先於第二章中，吾人設計特定特徵阻抗與電氣長度之人工合成帶線，並探討其等效電路、傳播特性、頻寬響應、電路縮小能力等參數。在第三章中，吾人利用人工合成耦合帶線，實現一款微型化寬面方向耦合器。該耦合器可利用半電路疊加法與ABCD矩陣，分析其奇偶模態特徵阻抗與傳播常數。
利用微型化寬面耦合器，本論文之第四章進行一款微型化馬群平衡-不平衡轉換器之設計。該設計利用調整人工合成耦合帶線之耦合量，俾使馬群平衡-不平衡轉換器於平衡輸出端獲得相位和大小響應符合理想之結果。
最後利用前二章之研究結果，本論文於第五章設計一款雙平衡混波器。此架構於三端埠皆維持良好之隔離度，並可有效抑制射頻與本地訊號之偶次項諧波，其轉換損失、返回損失皆相當良好。本論文之三項電路設計皆證明此人工合成耦合帶線之電路縮小化能力。

Based the artificial transmission line proposed in the literature, this thesis investigates a new artificial stripline with multilayer printed circuit board fabrication process. The new artificial stripline is realized by utilizing quasi-lumped elements and their discontinuities. In Chapter 2, we first develop an artificial stripline with a specific characteristic, frequency response, and miniaturization capability are discussed.
In Chapter 3, we develop a new miniaturized broadside coupler by utilizing the artificial coupled stripline. The even and odd mode characteristic impedances and propagation constants are derived.
In Chapter 4, we develop a new miniaturized Marchand balun. The amplitude and phase responses at the balanced output ports are optimized by tuning the coupling coefficients of the artificial coupled striplines in the Marchand balun. By utilizing the proposed Marchand balun, in Chapter 5 We propose a new double balanced mixer. The mixer features good isolations between all three ports, excellent rejection of all even order harmonics at the RF and LO ports, as well as good return loss and conversion loss. All the designs demonstrate the miniaturization capability of the proposed artificial coupled stripline.

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