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1.1 Background and Applications. |
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1.2 Transmission Lines and Waveguides. |
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1.3 Organization of the Book. |
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2 Analysis and Modeling of Ring Resonators. |
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2.3.1 Magnetic-Wall Model. |
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2.3.2 Degenerate Modes of the Resonator. |
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2.3.3 Mode Chart for the Resonator. |
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2.3.4 Improvement of the Magnetic-Wall Model. |
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2.3.5 Simplified Eigenequation. |
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2.3.6 A Rigorous Solution. |
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2.4 Transmission-Line Model. |
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2.4.1 Coupling Gap Equivalent Circuit. |
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2.4.2 Transmission-Line Equivalent Circuit. |
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2.4.3 Ring Equivalent Circuit and Input Impedance. |
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2.4.4 Frequency Solution. |
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2.4.5 Model Verification. |
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2.4.6 Frequency Modes for Ring Resonators. |
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2.4.7 An Error in Literature for One-Port Ring Circuit. |
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2.5 Ring Equivalent Circuit in Terms of G, L, C 35 |
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2.5.1 Equivalent Lumped Elements for Closed- and Open-Loop Microstrip Ring Resonator. |
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2.5.2 Calculated and Experimental Results. |
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2.6 Distributed Transmission-Line Model. |
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2.6.1 Microstrip Dispersion. |
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2.6.2 Effect of Curvature. |
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2.6.3 Distributed-Circuit Model. |
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3 Modes, Perturbations, and Coupling Methods of Ring Resonators. |
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3.2 Regular Resonant Modes. |
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3.3 Forced Resonant Modes. |
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3.4 Split Resonant Modes. |
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3.4.1 Coupled Split Modes. |
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3.4.2 Local Resonant Split Modes. |
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3.4.3 Notch Perturbation Split Modes. |
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3.4.4 Patch Perturbation Split Modes. |
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3.5 Further Study of Notch Perturbations. |
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3.6 Split (Gap) Perturbations. |
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3.7 Coupling Methods for Microstrip Ring Resonators. |
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3.8 Effects of Coupling Gaps. |
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3.10 Uniplanar Ring Resonators and Coupling Methods. |
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3.11 Perturbations in Uniplanar Ring Resonators. |
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4 Electronically Tunable Ring Resonators. |
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4.3 Varactor Equivalent Circuit. |
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4.4 Input Impedance and Frequency Response of the Varactor-Tuned Microstrip Ring Circuit. |
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4.5 Effects of the Package Parasitics on the Resonant Frequency. |
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4.6 Experimental Results for Varactor-Tuned Microstrip Ring Resonators. |
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4.7 Double Varactor-Tuned Microstrip Ring Resonator. |
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4.8 Varactor-Tuned Uniplanar Ring Resonators. |
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4.9 Piezoelectric Transducer Tuned Microstrip Ring Resonator. |
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5 Electronically Switchable Ring Resonators. |
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5.2 PIN Diode Equivalent Circuit. |
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5.3 Analysis for Electronically Switchable Microstrip Ring Resonators. |
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5.4 Experimental and Theoretical Results for Electronically Switchable Microtrip Ring Resonators. |
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5.5 Varactor-Tuned Switchable Microstrip Ring Resonators. |
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6 Measurement Applications Using Ring Resonators. |
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6.2 Dispersion, Dielectric Constant, and Q-Factor Measurements. |
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6.3 Discontinuity Measurements. |
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6.4 Measurements Using Forced Modes or Split Modes. |
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6.4.1 Measurements Using Forced Modes. |
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6.4.2 Measurements Using Split Modes. |
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7.2 Dual-Mode Ring Bandpass Filters. |
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7.3 Ring Bandstop Filters. |
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7.4 Compact, Low Insertion Loss, Sharp Rejection, and Wideband Bandpass Filters. |
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7.5 Ring Slow-Wave Bandpass Filters. |
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7.6 Ring Bandpass Filters with Two Transmission Zeros. |
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7.7 Pizoeletric Transducer-Tuned Bandpass Filters. |
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7.8 Narrow Band Elliptic-Function Bandpass Filters. |
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7.9 Slotline Ring Filters. |
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8.2 180° Rat-Race Hybrid-Ring Couplers. |
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8.2.1 Microstrip Hybrid-Ring Couplers. |
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8.2.2 Coplanar Waveguide-Slotline Hybrid-Ring Couplers. |
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8.2.3 Asymmetrical Coplanar Strip Hybrid-Ring Couplers. |
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8.3 180° Reverse-Phase Back-to-Back Baluns. |
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8.4 180° Reverse-Phase Hybrid-Ring Couplers. |
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8.4.1 CPW-Slotline 180° Reverse-Phase Hybrid-Ring Couplers. |
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8.4.2 Reduced-Size Uniplanar 180° Reverse-Phase Hybrid-Ring Couplers. |
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8.4.3 Asymmetrical Coplanar Strip 180° Reverse-Phase Hybrid-Ring Couplers. |
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8.5 90° Branch-Line Couplers. |
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8.5.1 Microstrip Branch-Line Couplers. |
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8.5.2 CPW-Slotline Branch-Line Couplers. |
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8.5.3 Asymmetrical Coplanar Strip Branch-Line Couplers. |
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9.2 180° Reverse-Phase CPW-Slotline T-Junctions. |
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9.4 180° Double-Sided Slotline Ring Magic-Ts. |
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9.5 180° Uniplanar Slotline Ring Magic-Ts. |
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9.6 Reduced-Size Uniplanar Magic-Ts. |
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10 Waveguide Ring Resonators and Filters. |
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10.2 Waveguide Ring Resonators. |
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10.2.1 Regular Resonant Modes. |
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10.2.2 Split Resonant Modes. |
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10.2.3 Forced Resonant Modes. |
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10.3 Waveguide Ring Filters. |
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10.3.1 Decoupled Resonant Modes. |
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10.3.2 Single-Cavity Dual-Mode Filters. |
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10.3.3 Two-Cavity Dual-Mode Filters. |
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11 Ring Antennas and Frequency-Selective Surfaces. |
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11.2 Ring Antenna Circuit Model. |
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11.2.1 Approximations and Fields. |
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11.2.2 Wall Admittance Calculation. |
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11.2.3 Input Impedance Formulation for the Dominant Mode. |
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11.2.4 Other Reactive Terms. |
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11.2.5 Overall Input Impedance. |
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11.2.6 Computer Simulation. |
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11.3 Circular Polarization and Dual-Frequency Ring Antennas. |
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11.4 Slotline Ring Antennas. |
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11.5 Active Antennas Using Ring Circuits. |
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11.6 Frequency-Selective Surfaces. |
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11.7 Reflectarrays Using Ring Resonators. |
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12 Ring Mixers, Oscillators, and Other Applications. |
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12.2 Rat-Race Balanced Mixers. |
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12.3 Slotline Ring Quasi-Optical Mixers. |
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12.5 Microwave Optoelectronics Applications. |
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12.6 Metamaterials Using Split-Ring Resonators. |
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