ISBN: 3-540-67535-3
TITLE: Microwave Resonators and Filters for Wireless Communication
AUTHOR: Makimoto, Mitsuo; Yamashita, Sadahiko
TOC:

Contents
1. Introduction 1
1.1 The History of Filters in Telecommunication 1
1.2 Filters for Wireless Communication 3
1.3 Classification of Resonators and Filters for Wireless Communication 5
1.4 Transmission-Line Resonators and Stepped Impedance Resonator (SIR) 7
2. Basic Structure and Characteristics of SIR 11
2.1 Basic Structure of SIR 11
2.2 Resonance Conditions and Resonator Electrical Length 12
2.3 Spurious Resonance Frequencies 16
2.4 Derivation of an Equivalent Circuit of SIR 16
3. Quarter-Wavelength-Type SIR 19
3.1 Analysis of lambda_g/4-Type Coaxial SIR 20
3.1.1 Impedance Ratio R_Z 20
3.1.2 Effects of Discontinuity 21
3.1.3 Unloaded-Q of Coaxial SIR 24
3.2 Bandpass Filters Using Coaxial SIR 30
3.2.1 Synthesis Method of SIR-BPF Using Capacitive Coupling 30
3.2.2 Design Examples and Performances 32
3.3 Double Coaxial SIR (DC-SIR) 39
3.3.1 Advantages of DC-SIR 39
3.3.2 Resonance Condition and Unloaded-Q 39
3.3.3 400 MHz-Band High-Power Antenna Duplexer 41
3.4 Dielectric Coaxial SIR 45
3.4.1 Dielectric Materials and Features of Dielectric Resonators 45
3.4.2 Basic Structure and Characteristics of Dielectric Coaxial Resonator 47 3.4.3 Design Example of Antenna Duplexer for Portable Radio Telephone 50
3.4.4 Dielectric DC-SIR 53
3.4.5 Dielectric Monoblock SIR-BPF 58
X Contents
3.5 Stripline SIR 60
3.5.1 Basic Structures and Features 60
3.5.2 Coupling Between Resonators 61
3.5.3 Stripline SIR-BPF 62
4. Half-Wavelength-Type SIR 65
4.1 Stripline lambda_g/2 Type S IR 66
4.1.1 Basic Characteristics 66
4.1.2 Equivalent Expressions for Parallel Coupled-Lines Using Inverter 67
4.1.3 Synthesis of Stripline Parallel-Coupled SIR-BPF 71
4.1.4 Filter Design Examples 74
4.2 Internally Coupled SIR 84
4.2.1 Basic Structures and Resonance Condition 84
4.2.2 Equivalent Circuits at Resonance 89
4.2.3 Filter Design Examples 91
4.2.4 Application to Oscillator and Mixer Circuits 101
5. One-Wavelength-Type SIR 107
5.1 Orthogonal Resonance Modes in the Ring Resonator 107
5.2 Application of lambda_g-Type SIR as Four-Port Devices 109
5.3 Application of lambda_g-Type SIR as Two-Port Devices 112
5.3.1 Coupling Means for Orthogonal Resonant Modes 112
5.3.2 Analysis of Coupling Between Orthogonal Resonant Modes 115
5.3.3 Application to Filters 119
6. Expanded Concept and Technological Trends in SIR 127
6.1 SIR Composed of Composite Materials 127
6.1.1 Combination of Magnetic and Dielectric Materials 127
6.1.2 Coaxial SIR Partially Loaded with Dielectric Material 128
6.2 Multistep SIR and Tapered-Line Resonators 131
6.3 Folded-Line SIR 139
6.4 Technological Trends of SIR in the Future 145
Appendix. Analysis of Resonator Properties Using General-Purpose Microwave Simulator 149
A.1 Design Parameters of Direct-Coupled Resonator BPF 149
A.2 Filter Design by Experimental Method 150
A.3 Determination of Q and k Using General Purpose Microwave Simulator 151
A.3.1 Determination of Q 151
A.3.2 Determination of Coupling Coefficient 154
References 157
Index 161
END
