Microwave Transmission Line Couplers

By: J.A.G. Malherbe

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Hardcover | 1 December 1988

At a Glance

Hardcover
232 Pages

Dimensions(cm)
24.13 x 17.78 x 1.91

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A reference for the engineer interested in the design procedure. Covers practical considerations with complete design examples. The appendices contain two simple computer programs for the analysis of symmetrical three and four-port networks, and coupled-line configuration applications for replicatio

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Non-Fiction Engineering & Technology Electronics & Communications Engineering Electronics Engineering Microwave Technology Science Physics Electricity

Preface	p. xi
Basic Principles and Definitions	p. 1
Introduction	p. 1
Network Parameters	p. 2
Scattering Parameters	p. 2
Odd and Even Networks	p. 3
Transmission Line Properties	p. 5
Transmission Line Network Model	p. 6
ABCD Parameters	p. 8
Interrelationship	p. 10
Definition of Coupler Parameters	p. 10
Physical Structures	p. 13
Analysis	p. 15
References	p. 15
Branch-Line Directional Couplers and Power Dividers	p. 17
Introduction	p. 17
Scattering Parameter Synthesis	p. 17
Synthesis of a 180[degree] Hybrid Coupler	p. 19
90[degree] Branch-line Coupler	p. 22
Power Divider	p. 23
Branch-line Hybrid, Odd- and Even-Mode Analysis	p. 24
Even- and Odd-Mode Admittances	p. 25
Performance at Band Center	p. 25
Variation of Parameters with Frequency	p. 28
Limits on Physical Realization	p. 28
Rat-race Hybrids	p. 31
Odd- and Even-Mode Analysis	p. 32
Conditions at Band Center	p. 33
Stepped Hybrid-Ring Directional Coupler	p. 37
Other Realizations	p. 39
Power Dividers	p. 42
Equal-Split Compensated Power Dividers	p. 44
Power Dividers with Unequal Power Split	p. 47
References	p. 52
Wideband Connected-Line Couplers	p. 53
Introduction	p. 53
Wideband Branch-line Couplers	p. 54
Matrix Properties of Symmetrical Couplers	p. 54
The Synthesis Problem	p. 57
Butterworth Response	p. 58
Chebyschev Response	p. 58
Synthesis Procedure	p. 60
Prototypes	p. 61
Design Example	p. 64
Wideband Power Dividers	p. 65
Uncoupled Lines	p. 67
Design Formulas for N = 2	p. 68
General Design Formulas for N [greater than or equal] 3	p. 71
Power Dividers with Coupled Lines	p. 74
Coupled-Line Equations	p. 78
Design Example	p. 79
References	p. 82
Single-Section Coupled-Line Directional Couplers	p. 83
Introduction	p. 83
Coupler Action	p. 83
Responses	p. 83
Isolation	p. 86
Match	p. 86
Coupler Condition	p. 86
Coupling	p. 87
Couplers with Unequal Characteristic Impedances	p. 89
Multiple Coupled Lines	p. 91
Lange Coupler	p. 92
Design Examples	p. 94
Stripline Couplers, Low Coupling	p. 94
Offset Parallel-coupled Stripline	p. 95
Parallel-Coupled Bars	p. 96
Coupled Microstrip Line	p. 97
Lange Coupler	p. 98
Tandem Connection of Directional Couplers	p. 99
References	p. 100
Wideband Stepped Coupled-Line Couplers	p. 101
Introduction	p. 101
Cascade Connection Equivalence	p. 101
Equivalent Flow Graph of Two Sections	p. 101
Unit Element Equivalent Circuit	p. 105
Stepped Asymmetric Couplers	p. 107
Prototype Synthesis Procedure	p. 107
Cascade Network Properties	p. 114
Synthesis Example	p. 115
Tables for Asymmetric Couplers	p. 119
Stepped Symmetrical Couplers	p. 126
Special Equiripple Polynomials	p. 126
Prototype Synthesis Procedure	p. 127
Network Synthesis	p. 129
Tables for Symmetrical Couplers	p. 130
References	p. 134
Ultrawideband Couplers With Continuously Varying Cross Section	p. 135
Introduction	p. 135
Tapered-Line Magic-T	p. 136
Equivalent Circuit	p. 137
Tapered-Line Transformer	p. 139
Design Example	p. 142
Symmetrical 90[degree] Directional Couplers	p. 142
Couplers with Periodic Zeros in p([mu])	p. 145
Design Example	p. 149
Asymmetric Chebyschev High-Pass Couplers	p. 152
Synthesis Procedure	p. 152
Polynomial Representation	p. 154
Design Example	p. 154
References	p. 157
Network Analysis Programs	p. 159
Introduction	p. 159
Program Symfour	p. 159
Method of Calculation	p. 159
Preparation	p. 160
Running	p. 161
Analysis Examples	p. 163
Branch-line Hybrid	p. 163
Optimized Hybrid Ring	p. 165
Wideband Branch-line Coupler	p. 170
Coupled-Line Section	p. 171
Program Symthree	p. 172
Method of Calculation	p. 172
Preparation and Running	p. 173
Two-Section Power Divider	p. 174
Program Listings	p. 176
Symfour	p. 176
Symthree	p. 182
Coupled-Line Parameters	p. 189
Introduction	p. 189
Materials	p. 189
Conductor Thickness	p. 190
Substrates	p. 190
Parallel Coupled Lines	p. 191
Equations	p. 191
Design Data	p. 193
Limits on Coupling	p. 195
Offset Parallel-Coupled Striplines	p. 195
Equations	p. 195
Tight Coupling	p. 196
Loose Coupling	p. 197
Design Data	p. 199
Limits on Coupling	p. 200
Parallel Coupled Bars	p. 201
Equations	p. 201
Design Data	p. 203
Limits on Coupling	p. 204
Coupled Microstrip Lines	p. 205
Equations	p. 205
Design Data	p. 207
Limits on Coupling	p. 208
Single Lines	p. 208
Program Listing: Ldims	p. 209
References	p. 215
Index	p. 217
Table of Contents provided by Syndetics. All Rights Reserved.

Microwave Transmission Line Couplers

At a Glance

Hardcover

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