Automated Electronic Filter Design (eBook)

Amal Banerjee is an Engineering manager at Analog Electronics in Kolkata, India.

Contents 6
Chapter 1: Introduction and Problem Statement 9
References 11
Chapter 2: Automated Electronic Filter Design Scheme 12
2.1 The Framework 12
2.2 Normalized Butterworth Filter 14
2.3 Practical Normalized Low Pass Butterworth Filter 16
2.4 Normalized Chebyschev Low Pass Filter 17
2.5 Normalized Inverse Chebyschev Filter 20
2.6 Normalized Bessel Filter 21
2.7 Denormalizing Prototype Filters to Real World Filters 22
Frequency Scaling 22
Impedance Scaling 23
2.8 Filter Transformations 24
Low Pass to High Pass Filter 24
Low Pass Filter to Band Pass Filter 25
2.9 Automated Filter Design Scheme 26
2.10 Low Pass to Band Pass Filter Conversion Example 27
References 30
Chapter 3: Automated Electronic Filter Design Scheme Implementation and Design Examples 32
3.1 Introduction 32
3.2 Automated Electronic Filter Design Scheme 32
3.3 Designing Filters with New Scheme 41
3.4 Seventh Order Low Pass Butterworth Filter: Simplified Scheme Implementation 42
3.5 Eighth Order High Pass Bessel Filter: Simplified Scheme Implementation 44
3.6 Eighth Order Band Pass Chebyschev Filter: Simplified Scheme Implementation 46
3.7 Designing Filters with New Scheme: Full Blown Implementation 50
3.8 Chebyschev High Pass Filter: Calculated Order 3 Cut Off Frequency 21 MHz Pass Band Ripple 0.45 dB 52
3.9 Chebyschev Band Pass Filter: Series Connection of High Pass and Low Pass Filters 53
3.10 Effect of Non-ideal Reactive Elements on Filter Behavior and Performance and Design Space Exploration 58
3.11 SPICE: Electronic Circuit Performance Evaluation Gold Standard 62
References 63
Chapter 4: Distributed Electronic Filter Design Foundations 64
4.1 Basic Transmission Line 64
4.2 TEM, TE and TM Propagation Modes 65
4.3 Equivalent Current-Voltage, Network Concepts, Admittance [Y], Impedance [Z], Scattering [S] and ABCD Matrices 65
4.4 Microstrip Transmission Line and Intrinsic Properties 70
Simple Microstrip Model 70
Advanced Microstrip Model - Hammarstadt and Jansen, Kirschning and Jensen 73
4.5 Special Microstrip Structures: Half/Quarter Wave Plates and Microstrip Discontinuities 74
Shorted Lambda by Two Microstrip Lines 74
Shorted Lambda by Four Microstrip Lines 75
Open Circuited Lambda by Two Microstrip Lines 75
Microstrip Discontinuity - Abrupt End 76
Microstrip Discontinuity - Gap 77
Microstrip Discontinuity - Step Impedance 78
4.6 Special Microstrip Structures Coupled Parallel Microstrips 79
Simple Parallel Microstrip Model 79
Detailed Parallel Microstrip Model - Hammarstadt and Jensen, Kirschning and Jensen 81
4.7 Microstrip Periodic Structures 84
4.8 Image Networks and Impedances 86
4.9 Insertion Loss Scheme for Electronic Filter Design 87
4.10 Coupled Parallel Microstrip Pairs, Even/Odd Mode Impedance and Filter Properties 87
4.11 Microstrip Band Pass Filter Using Capacitively Coupled Microstrip Resonators 94
Cohn Inverters and Coupled Resonators 94
Capacitively Coupled Microstrip Band Pass Filters 96
4.12 Capacitively Coupled Shunt Resonator Band Pass Filter 98
4.13 Stepped Impedance Low Pass Filter 100
References 101
Chapter 5: Automated Distributed Electronic Filter Design and SPICE Performance Analysis 103
5.1 Why Automate - Kirschning and Jensen Model 103
5.2 Fourth Order Butterworth Coupled Parallel Microstrip Band Pass Filter Design and SPICE Performance Analysis 106
5.3 Cohn Direct Coupled Third Order 750 MHz Center Frequency 100 MHz Bandwidth Band Pass Filter 112
5.4 Fifth Order 0.5 dB Pass Band Ripple Chebyschev Band Pass Filter Using End Capacitively Coupled Resonators (Microstrips) 115
5.5 Capacitively Coupled Shunt Resonator Seventh Order Chebyschev Band Pass Filter Design 120
5.6 5.75 GHz Cut Off 0.5 dB Pass Band Ripple Stepped Impedance Chebyschev Seventh Order Low Pass Filter and SPICE Performance ... 121
References 125
Chapter 6: Conclusion 126
Appendix A: Using the Automated Filter Design Tool 128
Appendix B: Richard´s Transformation and Kuroda´s Identities 130
Index 132