本論文針對(duì)射頻和微波應(yīng)用提出了頻率范圍為1.5-2.7 GHz的可調(diào)帶通濾波器。提出的濾波器用于實(shí)現(xiàn)高選擇性、尺寸微型化/小型化、寬帶和恒定絕對(duì)帶寬（CABW）的同時(shí)保持低插入損耗。尺寸微型化/小型化通過使用新型微帶階梯諧振器實(shí)現(xiàn)。高選擇性通過在通帶兩側(cè)引入兩個(gè)可控的傳輸零點(diǎn)獲得。寬帶和恒定絕對(duì)帶寬由一種新型微型化梳狀諧振器實(shí)現(xiàn)。在低損耗高選擇性的設(shè)計(jì)中,首先提出的是一種緊湊的具有獨(dú)立配置的第二通帶和高帶外抑制的單/雙頻帶濾波器。之后用相同的緊湊型接地階梯諧振器實(shí)現(xiàn)了一款頻率調(diào)諧范圍在1.58–1.88 GHz的低損耗可調(diào)濾波器,并加入了傳輸零點(diǎn)調(diào)諧特性來獲得更好的抑制水平。在寬帶和恒定絕對(duì)帶寬設(shè)計(jì)中,運(yùn)用了一種新型的階梯梳狀諧振器來實(shí)現(xiàn)高度小型化的固定和可調(diào)帶通濾波器。首先使用這一結(jié)構(gòu)設(shè)計(jì)了一款相對(duì)帶寬62.5%的寬帶濾波器,面積僅有6.5×8.5 mm²。另一款可調(diào)帶通濾波器具有寬調(diào)諧范圍1.6-2.7 GHz和恒定絕對(duì)帶寬（360±10）MHz,尺寸僅有6.7×8.7 mm²。此外,還引入了品質(zhì)因數(shù)控制來進(jìn)一步提高濾波器特性,同時(shí)提供了... 

【文章來源】：電子科技大學(xué)四川省 211工程院校 985工程院校 教育部直屬院校

【文章頁數(shù)】：89 頁

【學(xué)位級(jí)別】：碩士

【文章目錄】：
摘要
ABSTRACT
Chapter 1 Introduction
    1.1 Motivation
    1.2 Thesis Goals
    1.3 Thesis Outlines
Chapter 2 Background
    2.1 Basic Filter Theory
        2.1.1 Lowpass Prototype Filters
            2.1.1.1 Chebyshev Lowpass Prototype Response and Transfer Function
            2.1.1.2 Butterworth （Maximally-Flat） Lowpass Prototype Response and Transfer Function
            2.1.1.3 Quasi-Elliptic Lowpass Prototype Response and Transfer Function
        2.1.2 Immittance Inverters
        2.1.3 Lowpass to Bandpass Frequency Transformation
    2.2 Tuning Mechanisms
        2.2.1 Capacitance Tuning
        2.2.2 Inductance Tuning
        2.2.3 Capacitance-Inductance Tuning
    2.3 Tunable Filter Technology
        2.3.1 Mechanically Tunable Filters
        2.3.2 Ferroelectric BST Tunable filters
        2.3.3 Ferromagnetic YIG tunable filters
        2.3.4 RF-MEMS tunable filters
        2.3.5 Varactor based tunable filters
            2.3.5.1 Fundamental concepts of varactor diode
            2.3.5.2 Literature Overview of varactor-tuned microwave filters
Chapter 3 Compact Single/Dual-band Bandpass Filter
    3.1 Introduction
    3.2 Basic Design Theory
    3.3 Filter Design and Implementation
    3.4 Dual-bandpass Filter Design and Implementation
    3.5 Fabrication and measurements
    3.6 Summary
Chapter 4 High Selectivity Low-loss Tunable BPF with Transmission Zeros Control
    4.1 Introduction
    4.2 Filter Design & Implementation
        4.2.1 Design Procedure
        4.2.2 Implementation
    4.3 Fabrication and measurements
    4.4 Summary
Chapter 5 Compact Constant Bandwidth Tunable BPF with Wide Tuning Range and Bandwidth Control
    5.1 Introduction
    5.2 Compact Wideband Filter
        5.2.1 Design & Implementation
        5.2.2 Fabrication and measurements
    5.3 Compact constant bandwidth tunable filter with wide tuning range and bandwidth control
        5.3.1 Design & Implementation
        5.3.2 Bandwidth Control
        5.3.3 Fabrication and measurements
    5.4 Summary
Chapter 6 Conclusion and Future Work
    6.1 Conclusion and Contributions
    6.2 Future Work
Acknowledgements
References
Research Results Obtained During the Study for Master Degree



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