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Microwave Ring Circuits and Related Structures
Second Edition
by Kai Chang and Lung-Hwa Hsieh

Microwave Ring Circuits and Related Structures is now better than ever.

Microwave Ring Circuits and Related Structures has long been the only text fully dedicated to the treatment of ring resonators.

The second edition has been thoroughly revised to reflect the most current developments in the field.

In addition to updating all the original material, the authors have added extensive new coverage on:

  • A universal model for both rectangular and circular ring configurations
  • Applications of ring structures for all types of planar circuits
  • A new transmission line analysis
  • An abundance of new applications in bandpass and bandstop filters, couplers, oscillators, and antennas
Microwave Ring Circuits and Related Structures, Second Edition seeks to introduce the analysis and models of ring resonators and to apply them to both the old and the new applications, including microstrip, slotline, coplanar waveguide, and waveguide transmission lines.

Based on dissertations and papers published by graduate students, scholars, and research associates at A&M University, Microwave Ring Circuits and Related Structures, Second Edition is sure to be a valuable addition to both engineering classrooms and research libraries in the field.


  1. Introduction
    • Background and Applications
    • Transmission Lines and Waveguides
    • Organization of the Book

  2. Analysis and Modeling of Ring Resonators
    • Simple Model
    • Field Analyses
    • Transmission-Line Model
    • Ring Equivalent Circuit in Terms of G, L, C 35
    • Distributed Transmission-Line Model

  3. Modes, Perturbations, and Coupling Methods of Ring Resonators
    • Regular Resonant Modes
    • Forced Resonant Modes
    • Split Resonant Modes
    • Further Study of Notch Perturbations
    • Split (Gap) Perturbations
    • Coupling Methods for Microstrip Ring Resonators
    • Effects of Coupling Gaps
    • Enhanced Coupling
    • Uniplanar Ring Resonators and Coupling Methods
    • Perturbations in Uniplanar Ring Resonators

  4. Electronically Tunable Ring Resonators
    • Simple Analysis
    • Varactor Equivalent Circuit
    • Input Impedance and Frequency Response of the Varactor-Tuned Microstrip Ring Circuit
    • Effects of the Package Parasitics on the Resonant Frequency
    • Experimental Results for Varactor-Tuned Microstrip Ring Resonators
    • Double Varactor-Tuned Microstrip Ring Resonator
    • Varactor-Tuned Uniplanar Ring Resonators
    • Piezoelectric Transducer Tuned Microstrip Ring Resonator

  5. Electronically Switchable Ring Resonators
    • PIN Diode Equivalent Circuit
    • Analysis for Electronically Switchable Microstrip Ring Resonators
    • Experimental and Theoretical Results for Electronically Switchable Microtrip Ring Resonators
    • Varactor-Tuned Switchable Microstrip Ring Resonators

  6. Measurement Applications Using Ring Resonators
    • Dispersion, Dielectric Constant, and Q-Factor Measurements
    • Discontinuity Measurements
    • Measurements Using Forced Modes or Split Modes

  7. Filter Applications
    • Dual-Mode Ring Bandpass Filters
    • Ring Bandstop Filters
    • Compact, Low Insertion Loss, Sharp Rejection, and Wideband Bandpass Filters
    • Ring Slow-Wave Bandpass Filters
    • Ring Bandpass Filters with Two Transmission Zeros
    • Pizoeletric Transducer-Tuned Bandpass Filters
    • Narrow Band Elliptic-Function Bandpass Filters
    • Slotline Ring Filters
    • Mode Suppression

  8. Ring Couplers
    • 180 Rat-Race Hybrid-Ring Couplers
    • 180 Reverse-Phase Back-to-Back Baluns
    • 180 Reverse-Phase Hybrid-Ring Couplers
    • 90 Branch-Line Couplers

  9. Ring Magic-T Circuits
    • 180 Reverse-Phase CPW-Slotline T-Junctions
    • CPW Magic-Ts
    • 180 Double-Sided Slotline Ring Magic-Ts
    • 180 Uniplanar Slotline Ring Magic-Ts
    • Reduced-Size Uniplanar Magic-Ts

  10. Waveguide Ring Resonators and Filters
    • Waveguide Ring Resonators
    • Waveguide Ring Filters

  11. Ring Antennas and Frequency-Selective Surfaces
    • Ring Antenna Circuit Model
    • Circular Polarization and Dual-Frequency Ring Antennas
    • Slotline Ring Antennas
    • Active Antennas Using Ring Circuits
    • Frequency-Selective Surfaces
    • Reflectarrays Using Ring Resonators

  12. Ring Mixers, Oscillators, and Other Applications
    • Rat-Race Balanced Mixers
    • Slotline Ring Quasi-Optical Mixers
    • Ring Oscillators
    • Microwave Optoelectronics Applications
    • Metamaterials Using Split-Ring Resonators

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Microwave Ring Circuits and Related Structures
Second Edition
by Kai Chang and Lung-Hwa Hsieh

365 pages $152.95 + shipping
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