Study of Frequency Multiplier (1/3) (2/3) (3/3)

本計畫旨在建立頻率倍頻器相關之理論分析、 模擬、製作與實驗量測。本報告係敘述三年之研究 成果，主要包含兩項，一為使用CIC之PML GaAs PHEMT MMIC製程，研製3 至18 GHz六倍倍頻器模 組之設計、模擬及量測結果。該倍頻器模組包含一3 至6GHz二倍倍頻器、6至18GHz三倍倍頻器以及一 17至22GHz緩衝放大器。二為提出一新的自振倍頻 器設計之方法，並將應用於主動天線陣列。該自振 電路可達到較高之倍頻輸出功率。其電路係以 harmonic-balance方法分析，由量測結果顯示和模擬 結果相當吻合。所研製之主動式倍頻天線陣列，顯 示經由改變個別振盪器之自由振盪頻率，可達成天 線場型掃瞄的效果。The purpose of this three-year research project is to develop the basic theory, numerical simulation, implementation and experimental measurement of frequency multiplier circuits. In this report, two major items are covered. One is the design, simulation and measurement results of a k-band PHEMT MMIC frequency multiplier using CIC PML GaAs foundry. The second result is to develop a new analysis method for a coupled active multiplier antenna array. This method combines harmonic-balance method and weakly couple oscillator dynamic theory to give a well prediction of the second harmonic output power, locking bandwidth, matching condition and phase distribution between array elements. An X-band active multiplier antenna array is fabricated and its measurement results shown in good agreement with simulation results

Injection-Locked Active Antenna Array (3/3)

本計畫旨在建立注入鎖定主動天線陣列 之理論分析、模擬與實驗量測，以及N-埠 網路S-參數之量測原理、校準、裝置與應 用。 本報告係敘述第三年之研究成果，包 括：1、建立天線耦合效應之陣列分析方 法，2、使用諧波平衡法，建立分析注入鎖 定自我振盪倍頻器，及主動天線陣列之理 論、模擬與實驗量測，3、建立N-埠網路S- 參數之降埠量測方法，於天線特性量測之 應用。The purpose of this three-year research project is to develop the basic theory, numerical simulation and experimental measurement of an injection locked active antenna array and the basic principle, calibration, arrangement and measurement of the S-parameter of an N-port network. In this third-year report, the study results include: (1) analysis of finite antenna array including mutual coupling effects, (2) using harmonic-balance method to study the injection-locked self-oscillating doubler and active antenna array, (3) developing the port reduction method for S-parameter measurement of an N-port network and its applications on antenna measurement

Development and application of multiport microwave network measurement techniques (2/3)

本計畫為一三年計畫(92年至95年)，進行「多埠 微波網路量測技術之建立及應用」研發工作。本報 告係敘述第二年之研究成果，主要係建立「多埠激 發法」於微波影像之應用，共建立三項使用多源照 射之新型掃描微波影像技術，包含準單向式、雙向 式及多向式配置。分別敘述其原理、量測系統、校 準公式及量測結果。由實驗結果顯示，所研製之三 項微波成像系統，相對於傳統單源照射之微波成像 量測系統，可改善其影像解析度、散射物體之視角 及擷取傅氏空間資料之效率。This is a three-year project (from 92/8 to 95/7) to conduct researches on multiport microwave network measurement techniques. In this second-year report, the study results are mainly focused on the development of microwave diversity imaging of conducting objects using multi-source illumination. Three frequency-swept microwave imaging arrangements, namely quasimonostatic, bistatic and multistatic arrangements, using multi-source illumination technique are developed. These three arrangements are shown experimentally that the multi-source illumination is an effective approach to yield good image resolution and viewing angle of conducting object by effectively extending the recorded scattering information in the Fourier domain

Research on local oscillators (2/3)

本計畫為一三年計畫(90年至93年)，配合整合型 計畫「38-GHz無線收發系統關鍵元組件技術」，進 行其關鍵元組件-本地振盪器之研發。本計畫之重點 有三：一為研製一適用於38-GHz無線收發系統之本 地振盪器。二為建立振盪器陣列之理論推導、分析 公式、電路研製及實驗量測。三為進行振盪器陣列 之應用研究。 本報告係敘述第二年之研究成果，主要敘述本地 振盪器之研製，以及N-推式耦合振盪器陣列之研 製，及其理論分析與實驗量測結果。This is a three-year project (from 90/8 to 93/7) to conduct researches on the local oscillators under the main project “Key component technology of a 38 GHz wireless transmitting/ receiving system”. The major tasks of this project are the following three items. The first item is to implement the local oscillator circuit for 38GHz transmitting and receiving sytem. The second item is to develop the basic theory, formulation, circuits and measurement of the local oscillator array. The third item is to develop the active antenna array using oscillator array. In this second-year report, the study results are mainly focused on the development of a 36GHz local oscillator, and a novel approach of Nth-harmonic oscillator using an N-push coupled oscillator array