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Asymmetric Passive Components in Microwave Integrated Circuits

Asymmetric Passive Components in Microwave Integrated Circuits

Hee-Ran Ahn

ISBN: 978-0-470-03696-9

Nov 2005

376 pages


This book examines the new and important technology of asymmetric passive components for miniaturized microwave passive circuits. The asymmetric design methods and ideas set forth by the author are groundbreaking and have not been treated in previous works. Readers discover how these design methods reduce the circuit size of microwave integrated circuits and are also critical to reducing the cost of equipment such as cellular phones, radars, antennas, automobiles, and robots.

An introductory chapter on the history of asymmetric passive components, which began with asymmetric ring hybrids first described by the author, sets the background for the book. It lays a solid foundation with a chapter examining microwave circuit parameters such as scattering, ABCD, impedance, admittance, and image. A valuable feature of this chapter is a conversion table between the various circuit matrices characterizing two-port networks terminated in arbitrary impedances. The correct conversion has also never been treated in previous works.

Next, the author sets forth a thorough treatment of asymmetric passive component design, which covers the basic and indispensable elements for integration with other active or passive devices, including:
* Asymmetric ring hybrids
* Asymmetric branch-line hybrids
* Asymmetric three-port power dividers and N-way power dividers
* Asymmetric ring hybrid phase shifters and attenuators
* Asymmetric ring filters and asymmetric impedance transformers

With its focus on the principles of circuit element design, this is a must-have graduate-level textbook for students in microwave engineering, as well as a reference for design engineers who want to learn the new and powerful design method for asymmetric passive components.

1. Introduction.

1.1 Asymmetric Passive Components.

1.2 Circuit Parameters.

1.3 Asymmetric Four-Port Hybrids.

1.4 Asymmetric Three-Port Power Dividers.

1.5 Asymmetric Two-Port Components.


2. Circuit Parameters.

2.1 Scattering Matrix.

2.2 Scattering Parameters of Reduced Multiports.

2.3 Two-Port Network Analysis Using Scattering Parameters.

2.4 Other Circuit Parameters.

2.5 Analyses of Symmetric Networks.

2.6 Analyses with Image Parameters.



3. Conventional Ring Hybrids.

3.1 Introduction.

3.2 Original Concept of the 3-dB Ring Hybrid.

3.3 Conventional Ring Hybrids.

3.4 Conventional 3-dB Uniplanar Ring Hybrids.



4. Asymmetric Ring Hybrids.

4.1 Introduction.

4.2 Derivation of Design Equations of Asymmetric Ring Hybrids.

4.3 Small Asymmetric Ring Hybrids.

4.4 Wideband or Small Asymmetric Ring Hybrids.

4.5 Miniaturized Ring Hybrids Terminated in Arbitrary Impedances.



5. Asymmetric Branch-Line Hybrids.

5.1 Introduction.

5.2 Origin of Branch-Line Hybrids.

5.3 Multisection Branch-Line Couplers.

5.4 Branch-Line Hybrids for Impedance Transforming.

5.5 Asymmetric Four-Port Hybrids.



6. Conventional Three-Port Power Dividers.

6.1 Introduction.

6.2 Three-Port 3-dB Power Dividers.

6.3 Three-Port Power Dividers with Arbitrary Power Divisions.

6.4 Symmetric Analyses of Asymmetric Three-Port Power Dividers.

6.5 Three-Port 3-dB Power Dividers Terminated in Complex Frequency-Dependent Impedances.

6.6 Three-Port 45◦ Power Divider/Combiner.



7. Three-Port 3-dB Power Dividers Terminated in Different Impedances.

7.1 Introduction.

7.2 Perfect Isolation Condition.

7.3 Analyses.

7.4 Scattering Parameters of Three-Port Power Dividers.

7.5 Lumped-Element Three-Port 3-dB Power Dividers.

7.6 Coplanar Three-Port 3-dB Power Dividers.



8. General Design Equations for N-Way Arbitrary Power Dividers.

8.1 Introduction.

8.2 General Design Equations for Three-Port Power Dividers.

8.3 General Design Equations for N-Way Power Dividers.



9. Asymmetric Ring-Hybrid Phase Shifters and Attenuators.

9.1 Introduction.

9.2 Scattering Parameters of Asymmetric Ring Hybrids.

9.3 Asymmetric Ring-Hybrid Phase Shifters.

9.4 Asymmetric Ring-Hybrid Attenuator with Phase Shifts.



10. Ring Filters and Their Use in a New Measurement Technique for Inherent Ring-Resonance Frequency.

10.1 Introduction.

10.2 Ring Filters.

10.3 New Measurement Technique for Inherent Ring-Resonance Frequency.

10.4 Conclusions.



11. Small Impedance Transformers, CVTs and CCTs, and Their Applications to Small Power Dividers and Ring Filters.

11.1 Small Transmission-Line Impedance Transformers.

11.2 Mathematical Approach for CVTs and CCTs.

11.3 CVT3PDs and CCT3PDs.

11.4 Asymmetric Three-Port 45◦ Power Divider Terminated in Arbitrary Impedances.

11.5 CVT and CCT Ring Filters.

11.5.1 Analyses of Ring Filters.



Appendix A: Symbols and Abbreviations.

Appendix B: Conversion Matrices.

Appendix C: Derivation of the Elements of a Small Asymmetric Ring Hybrid.

Appendix D: Trigonometric Relations.

Appendix E: Hyperbolic Relations.