Preface xvii 1 Introduction 1 2 Basic Concepts of Electrical Filter Theory 9 2.1 ABCD Parameters 9 2.2 Open-circuit and Short-circuit Parameters 12 2.3 Scattering Parameters 13 2.4 Relationships Between Two-port Network Parameters 14 2.5 Immittance Transformation by Two-port Network 14 2.6 Bandpass Filter Characteristics 16 2.7 Chebyshev Low-pass Prototype Filter 17 2.
8 Relationship Between Transfer and Reflection Functions 22 3 Bandpass Filters with Parallel-type Resonators and Simple Couplings 25 3.1 G. Matthaei''s Design Method 25 3.2 Coupling Coefficient Between Resonators 28 3.3 External Q-factor of Resonators 32 3.4 Bandpass Filter Design Examples 35 4 Influence of Dissipative Loss on Bandpass Filter Frequency Response 39 4.1 Effect of Loss at Center Frequency of Passband 39 4.2 Influence of Loss on BPF Performance 40 4.
3 Unloaded Quality Factor Qu of Resonator 41 4.4 Physical Factors Determining Unloaded Quality Factor Qu of Microstrip and Stripline Resonators 43 5 Transmission Line Resonators 53 5.1 Uniform Resonators and Their Critical Frequencies 53 5.2 Nonuniform Transmission Line Resonators 56 5.3 Stepped-impedance Resonators 60 5.4 Synthesis Example of Stepped-impedance Resonators at Given Critical Frequencies 65 5.5 Optimization of Nonuniform Transmission Line Resonators 68 5.6 Parametric Synthesis 72 5.
7 Structural-parametric Synthesis 84 5.8 Microstrip BPF with Resonator Obtained by Structural-parametric Synthesis 91 5.9 Transmission Line Resonators with Mutually Opposite Critical Frequencies 92 6 Bandpass Filters with Cross-couplings 97 6.1 Triplet Bandpass Filters 97 6.2 Quadruplet Bandpass Filter 100 6.3 Quadruplet BPF with Two Cross-couplings 103 6.4 Cascaded Quadruplet Filters 105 6.5 General Coupling Matrix 107 6.
6 Coupling Matrix Modification Using Through-type Resonators 110 7 Bandpass Filters with Mixed Couplings 121 7.1 Representation Forms of Mixed Coupling Between Resonators 122 7.2 Direct and Inverse Problems of Mixed Coupled BPFs 125 7.3 Triplet BPF with Mixed Cross-coupling 127 7.4 Quadruplet BPF with Mixed Cross-coupling 145 7.5 Triplet BPF with All Mixed Couplings 155 7.6 Comments on BPFs with Mixed Couplings 164 8 Mixed Coupled High-order Inline and Cascaded Filters 169 8.1 Design Method of BPF with Mixed Couplings Between Adjacent Resonators 169 8.
2 Cascaded Two Triplet BPFs with Mixed Cross-couplings 173 8.3 Cascaded Quadruplet and Triplet BPFs with Mixed Cross-couplings 176 8.4 Cascaded Two Quadruplet Bandpass Filters with Mixed Cross-couplings 177 8.5 Cascaded Two Quadruplets and One Triplet BPFs with Mixed Cross-couplings 181 8.6 Stripline Realization of CT Filter with Mixed Cross-couplings 183 9 Resonators with One or Two Antiresonant Frequencies Close to Operating Resonant Frequency 189 9.1 Features of Resonators with Multiple Critical Frequencies 189 9.2 Transmission Line Resonators with One Antiresonant Frequency Close to Main Resonance Frequency 191 9.3 Lumped-distributed Resonator with One Antiresonant Frequency Close to Main Resonance Frequency 199 9.
4 TL Resonators with Two Antiresonant Frequencies Close to Operating Resonant Frequency 205 9.5 LD Resonators with Two Antiresonant Frequencies Close to Operating Resonant Frequency 220 9.6 Systematization and Basic Properties of Resonators with One or Two Antiresonant Frequencies Close to Operating Resonant Frequency 231 10 Filters with Simple Couplings and Multiple Transmission Zeros Generated by Resonators 237 10.1 BPF with Simple Couplings and Resonators with One Antiresonance Frequency Close to Main Resonance Frequency 237 10.2 BPF with Simple Couplings and Resonators with Two Antiresonance Frequencies Close to Operating Resonant Frequency 243 10.3 Influence of Destabilizing Factors on BPF Frequency Responses 262 10.4 Basic Properties of BPF with Simple Couplings and Multiple TZs Generated by Resonators 265 11 Filters with Mixed Couplings and Multiple Transmission Zeros Generated by Resonators 269 11.1 BPFs with Mixed Couplings and Resonators with One Antiresonance Frequency Close to Main Resonance Frequency 269 11.
2 BPFs with Mixed Couplings and Resonators with Two Antiresonance Frequencies Close to Main Resonant Frequency 271 11.3 Microstrip Second-order Mixed Coupled BPF with Multiple TZs 277 11.4 Properties of BPF with Mixed Couplings and Multiple T Zs Generated by Resonators 287 12 Stripline Bandpass Filters 291 12.1 Coupling Between Uniform Stripline Resonators 292 12.2 Coupling Between Stepped-impedance Stripline Resonators 296 12.3 BPF with SIRs 300 12.4 Coupling Coefficients at Higher Resonant Frequencies 306 12.5 Invariance of Coupling Coefficients Relative to Dielectric Constant 311 12.
6 Millimeter-wave Stripline Bandpass Filters 317 12.7 Influence of Metal Layer Thickness on Coupling Coefficients and Frequency Responses 323 12.8 Stripline BPF with Two Different Dielectric Substrates 328 12.9 Stripline Delay Line Filter with Two Different Dielectric Substrates 331 12.10 Stripline Duplexers 333 12.11 Properties of Stripline BPFs with Two Dielectric Substrates and Metal Layer 337 13 Microstrip Resonators and Bandpass Filters 343 13.1 Coupling Between Stepped-impedance Microstrip Resonators 343 13.2 Compact Mixed Coupled Microstrip Triplet BPFs 350 13.
3 Higher-order Mixed Coupled Compact Microstrip BPFs 360 13.4 Mixed Coupled Stepped-impedance Resonators in Microstrip BPFs on Thick Substrates and Low-mounted Screen 367 14 Bandpass Filters with Wide Stopband 389 14.1 Special Connecting Points on Quarter-wave and Half-wave Resonators 389 14.2 Microstrip BPF with Î/4 Resonators and Special Connecting Points 392 14.3 BPF with Î/4 Resonators and SIRs Coupled by Quarter-wave Segments 394 14.4 Transmission Line BPF with One Passband 398 15 Tunable Resonators 405 15.1 Resonators with Variable Capacitances, Tuning Limitations 405 15.2 Resonators with Variable Capacitances and Inductances, Tuning Limitations 427 15.
3 Hairpin Resonators Tuned by Capacitance 434 15.4 Unloaded Quality Factors of Tunable Resonators 441 16 Tunable Bandpass Filters 457 16.1 Varactor-tuned Microstrip BPF with Hairpin and Combline Resonators 457 16.2 Varactor-tuned Microstrip BPF with Two Operating Regimes 462 16.3 Bandpass Filter with Combined Frequency Tuning 467 16.4 Combline Bandpass Filter with Ferroelectric Capacitors 469 17 Dual-mode Resonators and Bandpass Filters 477 17.1 Dual-mode Resonators with Uniform TL Segments 477 17.2 Dual-mode Resonators with SILS 488 17.
3 Dual-mode Resonators with Two Transmission Zeros 503 17.4 Meander Dual-mode Resonators and Bandpass Filters 512 17.5 Reconfigurable Loop-type Dual-mode Resonators and Filters 526Contents xv References 537 Index 541.