Nonuniform Line Microstrip Directional Couplers and Filters

By: Sener Uysal

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Hardcover | 1 December 1993

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248 Pages

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24.13 x 15.88 x 1.91

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This text sets out to provide a source of design techniques for leading to reduction in expense, size and weight of directional couplers and filters. It also gives step-by-step procedures for enhancing circuit performance. Numerous design examples and verified measured results for ultrawideband, bandpass, periodic and co-directional couplers are provided.

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Non-Fiction Engineering & Technology Electronics & Communications Engineering Electronics Engineering Microwave Technology Circuits & Components

Preface	p. xiii
Introduction	p. 1
Introductory Comments	p. 1
Outline of the Book	p. 2
Uniform Microstrip Lines	p. 3
Uniform Coupled Lines	p. 5
Nonuniform Lines	p. 9
Nonuniform Coupled Lines	p. 12
References	p. 14
Review of Microstrip Directional Couplers and Filters	p. 17
Introduction	p. 17
Practical Limitations in Microstrip Directional Couplers	p. 17
Practical Limitations in Microstrip Filters	p. 19
Types of Microstrip Couplers	p. 19
Types of Microstrip Filters	p. 29
Applications of Directional Couplers and Filters	p. 29
References	p. 33
Synthesis of Nonuniform Line Directional Couplers	p. 37
Introduction	p. 37
Synthesis of Uniform Coupled-Line Parameters	p. 37
Phase Velocity Compensation	p. 39
Computed Design Curves for Some Important Substrates	p. 41
Design Curves for Alumina Substrate with [epsilon][subscript r] = 9.9 and h = 0.635 mm	p. 41
Design Curves for Alumina Substrate with [epsilon][subscript r] = 9.9 and h = 0.25 mm	p. 43
Design Curves for Alumina Substrate with [epsilon][subscript r] = 9.9 and h = 0.1 mm	p. 43
Design Curves for Interdigitated Couplers on Alumina Substrate with [epsilon][subscript r] = 9.9 and h = 0.635 mm	p. 49
Design Curves for GaAs Substrate with [epsilon][subscript r] = 12.9 and h = 0.2 mm	p. 49
Design Curves for Interdigitated Couplers on GaAs Substrate with [epsilon][subscript r] = 12.9 and h = 0.2 mm	p. 54
Design Curves for GaAs Substrate with [epsilon][subscript r] = 12.9 and h = 0.1 mm	p. 54
Design Curves for Lanthalum Gallate with [epsilon][subscript r] = 24.5 and h = 0.25 mm	p. 54
Design Curves for Barium Tetratitanate Substrate with [epsilon][subscript r] = 37 and h = 0.635 mm	p. 61
Design Curves for RT-Duroid Substrate with [epsilon][subscript r] = 10.5 and h = 0.2 mm	p. 61
Synthesis Functions for Nonuniform Coupled Lines	p. 61
References	p. 67
Design and Construction of Ultrawideband Directional Couplers	p. 69
Introduction	p. 69
Design Procedure	p. 69
Nonuniform Coupler Layout	p. 74
Interdigitated Center Section	p. 79
Design Examples	p. 81
2-20 GHz, -20 dB Coupler on Alumina Substrate with [epsilon][subscript r] = 9.9 and h = 0.635 mm	p. 82
2-20 GHz, -14 dB Coupler on Alumina Substrate with [epsilon][subscript r] = 9.9 and h = 0.635 mm	p. 84
2-20 GHz, -3 dB Coupler on Alumina Substrate with [epsilon][subscript r] = 9.9 and h = 0.635 mm	p. 85
1-6 GHz, -3 dB Coupler on Alumina Substrate with [epsilon][subscript r] = 9.9 and h = 0.635 mm	p. 91
3-22.5 GHz, -10 dB Coupler on GaAs Substrate with [epsilon][subscript r] = 12.9 and h = 0.2 mm	p. 96
3-22.5 GHz, -3 dB Coupler on GaAs Substrate with [epsilon][subscript r] = 12.9 and h = 0.2 mm	p. 99
Reference	p. 99
Sensitivity Analysis for Nonuniform Line Directional Couplers	p. 101
The Effect of Nonuniform Slopes of Coupled Lines	p. 101
The Effect of Fabrication Tolerances	p. 104
The Effect of Bond Wires and Transition from Double Coupled Lines to an Interdigitated Center Section	p. 105
The Effect of [Delta]l	p. 110
The Effect of an Interdigitated Section	p. 111
The Effect of Losses	p. 113
References	p. 113
Bandpass Nonuniform Line Directional Couplers	p. 115
Introduction	p. 115
Design Procedure	p. 115
Modifications of p(x)	p. 117
Introducing a Dummy Channel for Realizability	p. 118
Adding a Constant to p(x)	p. 118
Adding a Linear Function to p(x)	p. 119
Multiplying Even-Mode Impedance by a Constant	p. 119
Selective (Regional) Optimization of p(x)	p. 120
Design Examples	p. 121
K[subscript u]-band, -3 dB Bandpass Coupler on Alumina Substrate with [epsilon][subscript r] = 9.9 and h = 0.635 mm	p. 121
X-band, -3 dB Bandpass Coupler on Alumina Substrate with [epsilon][subscript r] = 9.9 and h = 0.635 mm	p. 123
K[subscript a]-band, -8.34 dB Bandpass Coupler on GaAs Substrate with [epsilon][subscript r] = 12.9 and h = 0.2 mm	p. 130
75-95 GHz, -3 dB Bandpass Coupler on GaAs Substrate with [epsilon][subscript r] = 12.9 and h = 0.1 mm	p. 130
Multioctave Bandpass Couplers	p. 133
Multilevel Couplers	p. 134
References	p. 137
Bandpass Nonuniform Line Directional Filters	p. 139
Introduction	p. 139
Design Principles	p. 140
Matched Bandpass Filters	p. 141
Design Examples	p. 142
X-band Bandpass Filter on Alumina Substrate with [epsilon][subscript r] = 9.9 and h = 0.635 mm	p. 142
Wideband, Medium-Loss Bandpass Filters on Alumina Substrate with [epsilon][subscript r] = 9.9 and h = 0.635 mm	p. 144
K[subscript u]-Band Bandpass Filters on Alumina Substrate with [epsilon][subscript r] = 9.9 and h = 0.25 mm	p. 145
Cascaded or Tandem Connected Filters with Nonidentical Designs	p. 147
Bandpass Filters with an Interdigitated Section	p. 148
Reflection-Type Bandpass Filters	p. 151
Design Examples	p. 155
K[subscript a]-Band Bandpass Filter on GaAs Substrate with [epsilon][subscript r] = 12.9 and h = 0.2 mm	p. 155
K[subscript u]-Band Bandpass Filter on Alumina Substrate with [epsilon][subscript r] = 9.9 and h = 0.25 mm	p. 156
X-Band Bandpass Filters on Alumina Substrate with [epsilon][subscript r] = 9.9 and h = 0.635 mm	p. 156
Periodic Nonuniform Line Coupler-Filters and Multiplexers	p. 159
Introduction	p. 159
Design Principles	p. 160
Design Examples for Periodic Coupler-Filters on Alumina Substrate	p. 162
Reflection-Type Periodic Filters	p. 164
Multiplexers	p. 168
Design of Quadruplexers Using Almost 0 dB Matched Bandpass Filters	p. 168
Design of Quadruplexers Using -3 dB Matched Coupler-Filters	p. 169
Design of Quadruplexers Using -3 dB Reflection-Type Coupler-Filters	p. 170
References	p. 172
Codirectional Nonuniform Line Directional Couplers	p. 173
Introduction	p. 173
Analysis of Codirectional Couplers	p. 174
Design Curves for Codirectional Couplers	p. 176
Even- and Odd-Mode Phase Velocities versus Coupling Coefficient for Alumina Substrate with [epsilon][subscript r] = 9.9 and h = 0.635 mm, 0.24 mm, and 0.1 mm	p. 177
Even- and Odd-Mode Phase Velocities versus Coupling Coefficient for GaAs Substrate with [epsilon][subscript r] = 12.9 and h = 0.2 mm and 0.1 mm	p. 178
Even- and Odd-Mode Phase Velocities versus Coupling Coefficient for RT-Duroid Substrate with [epsilon][subscript r] = 10.5 and h = 0.2 mm	p. 181
Even- and Odd-Mode Phase Velocities versus Coupling Coefficient for Barium Tetratitanate Substrate with [epsilon][subscript r] = 37 and h = 0.635 mm	p. 183
Design Examples	p. 185
Wiggly Codirectional Couplers	p. 188
Design Examples	p. 189
Wideband Codirectional Couplers	p. 191
Design Example	p. 195
Tandem Connection of Codirectional Couplers	p. 198
Cascaded Codirectional Couplers	p. 198
References	p. 201
Applications of Nonuniform Line Directional Couplers	p. 203
Introduction	p. 203
Fixed Attenuator, Crossover, and dc-Block	p. 204
Fixed Phase Shifter	p. 205
Continuously Variable Analog Phase Shifter	p. 206
Matching Networks	p. 210
Beam-Forming Networks for Phased Array Antennas	p. 213
[Sigma]-[Delta] Circuits	p. 217
Monopulse Comparators	p. 219
Mixers	p. 221
Other Applications	p. 222
References	p. 224
Index	p. 225
Table of Contents provided by Syndetics. All Rights Reserved.

Nonuniform Line Microstrip Directional Couplers and Filters

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Hardcover

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