結合Cherry Hooper放大機制與被動電路的射頻混頻器設計與實作

Abstract

本篇論文主要研究射頻積體電路中寬頻的高頻混頻器與被動電路的分析。 本論文首先介紹60GHz實驗性質的rat-race對稱電路，接著在電路設計方面以TSMC SiGe 0.35μm BiCMOS以及GCT 2μm InGaP/GaAs HBT 製程來研製應用於10GHz 之寬頻混頻器，其中在TSMC SiGe製程包含了使用Cherry Hooper技術混頻器以及電流鏡主動負載單端輸出的微混頻器。另外在GCT 2μm InGaP/GaAs HBT 製程，採用現有的變壓器測試鍵，設計低壓操作的混頻電路，有著優異的轉換增益與頻寬；在高頻的使用Cherry Hooper技術混頻器更高達2GHz以上的電路頻寬。進而在電路的創新性與複雜性，設計了使用集總元件結合LC電流合成器的混頻器以及降低鏡像訊號的I/Q通道混頻器。使用Cherry Hooper技術混頻器改善了無線通訊中寬頻的需求。

In this thesis, we present wideband mixers in high frequency and the analysis of passive circuits in RF IC design. First of all, we introduce the 60GHz rat-race which is symmetric and experimental, and then implement 10GHz wideband mixer by using TSMC SiGe 0.35um BiCMOS process and GCTC 2.0um HBT process in circuit design. In TSMC SiGe 0.35um,we design micro mixer with Cherry Hooper technique and active load with single ended output.Using the transformer testkey of GCTC 2μm InGaP/GaAs HBT, we implement the transformer mixer at low voltage operation with excellent conversion gain and wide bandwidth.In High frequency application,the mixer with Cherry Hooper technique shows widebandwidth over 2GHz.Finally,we design LC combiner up converter with Cherry Hooper technique and lumped rat race and I/Q channel single sideband up converter in order to reduce image injection signal. The mixers with Cherry Hooper technique provides the demand of wide bandwidth in WLAN’s application.