RF and Microwave Coupled-Line Circuits Second Edition -- Foreword to the First Edition -- Preface to the Second Edition -- Preface to the First Edition -- Chapter 1 Introduction -- 1.1 Coupled Structures -- 1.1.1 Types of Coupled Structures -- 1.1.2 Coupling Mechanism -- 1.2 Components Based on Coupled Structures -- 1.2.1 Directional Couplers -- 1.2.2 Filters -- 1.3 Applications -- 1.4 Scope of the Book -- References -- Chapter 2 Microwave Network Theory -- 2.1 Actual and Equivalent Voltages and Currents -- 2.1.1 Normalized Voltages and Currents -- 2.1.2 Unnormalized Voltages and Currents -- 2.1.3 Reflection Coefficient, VSWR, and Input Impedance -- 2.1.4 Quantities Required to Describe the State of a Transmission Line -- 2.2 Impedance and Admittance Matrix Representation of a Network -- 2.2.1 Impedance Matrix -- 2.2.2 Admittance Matrix -- 2.2.3 Properties of Impedance and Admittance Parameters of a Passive Network -- 2.3 Scattering Matrix -- 2.3.1 Unitary Property -- 2.3.2 Transformation with Change in Position of Terminal Planes -- 2.3.3 Reciprocal Networks -- 2.3.4 Relationship Between Normalized and Unnormalized Matrices -- 2.4 Special Properties of Two-, Three-, and Four-Port Passive, Lossless Networks -- 2.4.1 Two-Port Networks -- 2.4.2 Three-Port Reciprocal Networks -- 2.4.3 Three-Port Nonreciprocal Networks -- 2.4.4 Four-Port Reciprocal Networks -- 2.5 Special Representation of Two-Port Networks -- 2.5.1 ABCD Parameters -- 2.5.2 Reflection and Transmission Coefficients in Terms of ABCD Parameters -- 2.5.3 Equivalent T and P Networks of Two-Port Circuits -- 2.6 Conversion Relations -- 2.7 Scattering Matrix of Interconnected Networks -- 2.7.1 Scattering Parameters of Reduced Networks -- 2.7.2 Reduction of a Three-Port Network into a Two-Port Network -- 2.7.3 Reduction of a Two-Port Network into a One-Port Network.

2.7.4 Reduction of a Four-Port Network into a Two-Port Network -- References -- Chapter 3 Characteristics of Planar Transmission Lines -- 3.1 General Characteristics of TEM and Quasi-TEM Modes -- 3.1.1 TEM Modes -- 3.1.2 Quasi-TEM Modes -- 3.1.3 Skin Depth and Surface Impedance of Imperfect Conductors -- 3.1.4 Conductor Loss of TEM and Quasi-TEM Modes -- 3.2 Representation of Capacitances of Coupled Lines -- 3.2.1 Even- and Odd-Mode Capacitances of Symmetrical Coupled Lines -- 3.2.2 Parallel-Plate and Fringing Capacitances of Single and Coupled Planar Transmission Lines -- 3.3 Characteristics of Single and Coupled Striplines -- 3.3.1 Single Stripline -- 3.3.2 Edge-Coupled Striplines -- 3.4 Characteristics of Single and Coupled Microstrip Lines -- 3.4.1 Single Microstrip -- 3.4.2 Coupled Microstrip Lines -- 3.5 Single and Coupled Coplanar Waveguides -- 3.5.1 Coplanar Waveguide -- 3.5.2 Coplanar Waveguide with Upper Shielding -- 3.5.3 Conductor-Backed Coplanar Waveguide with Upper Shielding -- 3.5.4 Coupled Coplanar Waveguides -- 3.6 Suspended and Inverted Microstrip Lines -- 3.7 Broadside-Coupled Lines -- 3.7.1 Broadside-Coupled Striplines -- 3.7.2 Broadside-Coupled Suspended Microstrip Lines -- 3.7.3 Broadside-Coupled Offset Striplines -- 3.8 Slot-Coupled Microstrip Lines -- References -- Chapter 4 Analysis of Uniformly Coupled Lines -- 4.1 Even- and Odd-Mode Analysis of Symmetrical Networks -- 4.1.1 Even-Mode Excitation -- 4.1.2 Odd-Mode Excitation -- 4.2 Directional Couplers Using Uniform Coupled Lines -- 4.2.1 Forward-Wave (or Codirectional) Directional Couplers -- 4.2.2 Backward-Wave Directional Couplers -- 4.3 Uniformly Coupled Asymmetrical Lines -- 4.3.2 Distributed Equivalent Circuit of Coupled Lines -- 4.3.3 Relation Between Normal Mode (c and p ) and Distributed Line Parameters.

4.3.4 Approximate Distributed Line or Normal-Mode Parameters of Asymmetrical Coupled Lines -- 4.4 Directional Couplers Using Asymmetrical Coupled Lines -- 4.4.1 Forward-Wave Directional Couplers -- 4.4.2 Backward-Wave Directional Couplers -- 4.5 Design of Multilayer Couplers -- 4.5.1 Determination of Capacitance and Inductance Parameters Using Sonnet Lite -- 4.5.2 Coupler Design -- References -- Chapter 5 Broadband Forward-Wave Directional Couplers -- 5.1 Forward-Wave Directional Couplers -- 5.1.1 3-dB Coupler Using Symmetrical Microstrip Lines -- 5.1.2 Design and Performance of 3-dB Asymmetrical Couplers -- 5.1.3 Ultra-Broadband Forward-Wave Directional Couplers -- 5.2 Coupled-Mode Theory -- 5.2.1 Nature of Coupling Coefficients K12 and K21 -- 5.2.2 Waves on Lines 1 and 2 in the Presence of Coupling -- 5.2.3 Coupled-Mode Theory and Even- and Odd-Mode Analysis -- 5.2.4 Coupling Between Asymmetrical Lines -- 5.3 Coupled-Mode Theory for Weakly Coupled Resonators -- References -- Chapter 6 Parallel-Coupled TEM DirectionalCouplers -- 6.1 Coupler Parameters -- 6.2 Single-Section Directional Coupler -- 6.2.1 Frequency Response -- 6.2.3 Compact Couplers -- 6.2.4 Equivalent Circuit of a Quarter-Wave Coupler -- 6.3 Multisection Directional Couplers -- 6.3.1 Theory and Synthesis -- 6.3.2 Limitations of Multisection Couplers -- 6.4 Techniques to Improve Directivity of Microstrip Couplers -- 6.4.1 Lumped Compensation -- 6.4.2 Use of Dielectric Overlays -- 6.4.3 Use of Wiggly Lines -- 6.4.4 Other Techniques -- References -- Chapter 7 Nonuniform Broadband TEM Directional Couplers -- 7.1 Symmetrical Couplers -- 7.1.1 Coupling in Terms of Even-Mode Characteristic Impedance -- 7.1.2 Synthesis -- 7.1.3 Technique for Determining Weighting Functions -- 7.1.4 Electrical and Physical Length of a Coupler -- 7.1.5 Design Procedure -- 7.2 Asymmetrical Couplers -- References.

Chapter 8 Tight Couplers -- 8.1 Introduction -- 8.2 Branch-Line Couplers -- 8.2.1 Modified Branch-Line Coupler -- 8.2.2 Reduced-Size Branch-Line Coupler -- 8.2.3 Lumped-Element Branch-Line Coupler -- 8.2.4 Broadband Branch-Line Coupler -- 8.3 Rat-Race Coupler -- 8.3.1 Modified Rat-Race Coupler -- 8.3.2 Reduced-Size Rat-Race Coupler -- 8.3.3 Lumped-Element Rat-Race Coupler -- 8.4 Multiconductor Directional Couplers -- 8.4.1 Theory of Interdigital Couplers -- 8.4.2 Design of Interdigital Couplers -- 8.5 Tandem Couplers -- 8.6 Multilayer Tight Couplers -- 8.6.1 Broadside Couplers -- 8.6.2 Re-Entrant Mode Couplers -- 8.7 Compact Couplers -- 8.7.1 Lumped-Element Couplers -- 8.7.2 Spiral Directional Couplers -- 8.7.3 Meander Line Directional Coupler -- 8.8 Other Tight Couplers -- References -- Chapter 9 Coupled-Line Filter Fundamentals -- 9.1 Introduction -- 9.1.1 Types of Filters -- 9.1.2 Applications -- 9.2 Theory and Design of Filters -- 9.2.1 Maximally Flat or Butterworth Prototype -- 9.2.2 Chebyshev Response -- 9.2.3 Other Response-Type Filters -- 9.2.4 LC Filter Transformation -- 9.2.5 Filter Analysis and CAD Methods -- 9.2.6 Some Practical Considerations -- 9.3 Parallel-Coupled Line Filters -- 9.3.1 Design Example -- 9.4 Interdigital Filters -- 9.4.1 Design Examples -- 9.5 Combline Filters -- 9.5.1 Design Example -- 9.6 The Hairpin-Line Filter -- 9.6.1 Design Example -- 9.7 Parallel-Coupled Bandstop Filter -- 9.7.1 Design Example -- References -- Chapter 10 Advanced Coupled-Line Filters -- 10.1 Introduction -- 10.2 Coupled-Line Filters with Enhanced Stopband Performance -- 10.2.1 Design Using Unevenly-Coupled Stages -- 10.2.2 Design Using Periodically Nonuniform Coupled Lines -- 10.2.3 Design Using Meandered Parallel-Coupled Lines -- 10.2.4 Design Using Defected Ground Structures.

10.3 Coupled-Line Filters Exhibiting Advanced Filtering Characteristics -- 10.3.1 Filters with Cross-Coupled Resonators -- 10.3.2 Filters with Source-Load Coupling -- 10.3.3 Filters with Asymmetric Port Excitations -- 10.4 Interdigital Filters Using Stepped Impedance Resonators -- 10.4.1 Narrowband Design -- 10.4.2 Wideband Design -- 10.5 Dual-Band Filters -- References -- Chapter 11 Filters Using Advanced Materials and Technologies -- 11.1 Introduction -- 11.2 Superconductor Coupled-Line Filters -- 11.2.1 Cascaded Quadruplet and Triplet Filters -- 11.2.2 High-Order Selective Filters with Group-Delay Equalization -- 11.3 Micromachined Filters -- 11.3.1 Miniature Interdigital Filters on Silicon -- 11.3.2 Overlay Coupled CPW Filters -- 11.4 Filters Using Advanced Dielectric Materials -- 11.4.1 Low-Temperature Cofired Ceramic Filters -- 11.4.2 Liquid Crystal Polymer Filters -- 11.5 Filters for Ultra-Wideband (UWB) Technology -- 11.5.1 Optimum Stub Line Filters -- 11.5.2 Multimode Coupled-Line Filters -- 11.5.3 Microstrip-Coplanar Waveguide Coupled-Line Filters -- 11.5.4 UWB Filters with Notch Band -- 11.6 Metamaterial Filters -- References -- Chapter 12 Coupled-Line Circuit Components -- 12.1 DC Blocks -- 12.1.1 Analysis -- 12.1.2 Broadband DC Block -- 12.1.3 Biasing Circuits -- 12.1.4 Millimeter-Wave DC Block -- 12.1.5 High-Voltage DC Block -- 12.2 Coupled-Line Transformers -- 12.2.1 Open-Circuit Coupled-Line Transformers -- 12.2.2 Transmission Line Transformers -- 12.3 Interdigital Capacitor -- 12.3.1 Approximate Analysis -- 12.3.2 Full-Wave Analysis -- 12.4 Spiral Inductors -- 12.5 Spiral Transformers -- 12.6 Other Coupled-Line Components -- References -- Chapter 13 Baluns -- 13.1 Introduction -- 13.2 Microstrip-to-Balanced Stripline Balun -- 13.3 Analysis of a Coupled-Line Balun -- 13.4 Planar Transmission Line Baluns -- 13.4.1 Analysis.

13.4.2 Examples.