MICROWAVE RING CIRCUITS AND RELATED STRUCTURES
CONTENTS INTRODUCTION BACKGROUND AND APPLICATIONS TRANSMISSION LINES AND WAVEGUIDES ORGANIZATION OF THE BOOK ANALYSIS AND MODELING OF RING RESONATORS SIMPLE MODEL FIELD ANALYSES MAGNETIC-WALL MODEL DEGENERATE MODES OF THE RESONATOR MODE CHART FOR THE RESONATOR IMPROVEMENT OF THE MAGNETIC-WALL MODEL SIMPLI?ED EIGENEQUATION A RIGOROUS SOLUTION TRANSMISSION-LINE MODEL COUPLING GAP EQUIVALENT CIRCUIT TRANSMISSION-LINE EQUIVALENT CIRCUIT RING EQUIVALENT CIRCUIT AND INPUT IMPEDANCE FREQUENCY SOLUTION MODEL VERI?CATION FREQUENCY MODES FOR RING RESONATORS AN ERROR IN LITERATURE FOR ONE-PORT RING CIRCUIT DUAL MODE RING EQUIVALENT CIRCUIT IN TERMS OF G, L, C EQUIVALENT LUMPED ELEMENTS FOR CLOSED- AND OPEN-LOOP MICROSTRIP RING RESONATOR CALCULATED AND EXPERIMENTAL RESULTS DISTRIBUTED TRANSMISSION-LINE MODEL MICROSTRIP DISPERSION EFFECT OF CURVATURE DISTRIBUTED-CIRCUIT MODEL REFERENCES MODES, PERTURBATIONS, AND COUPLING METHODS OF RING RESONATORS REGULAR RESONANT MODES FORCED RESONANT MODES SPLIT RESONANT MODES COUPLED SPLIT MODES LOCAL RESONANT SPLIT MODES NOTCH PERTURBATION SPLIT MODES PATCH PERTURBATION SPLIT MODES FURTHER STUDY OF NOTCH PERTURBATIONS SPLIT (GAP) PERTURBATIONS COUPLING METHODS FOR MICROSTRIP RING RESONATORS EFFECTS OF COUPLING GAPS ENHANCED COUPLING 3 10 UNIPLANAR RING RESONATORS AND COUPLING METHODS 3 11 PERTURBATIONS IN UNIPLANAR RING RESONATORS 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 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 MEASUREMENT APPLICATIONS USING RING RESONATORS DISPERSION, DIELECTRIC CONSTANT, AND Q-FACTOR MEASUREMENTS DISCONTINUITY MEASUREMENTS MEASUREMENTS USING FORCED MODES OR SPLIT MODES MEASUREMENTS USING FORCED MODES MEASUREMENTS USING SPLIT MODES 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 7 10 MODE SUPPRESSION RING COUPLERS 180° RAT-RACE HYBRID-RING COUPLERS MICROSTRIP HYBRID-RING COUPLERS COPLANAR WAVEGUIDE-SLOTLINE HYBRID-RING COUPLERS ASYMMETRICAL COPLANAR STRIP HYBRID-RING COUPLERS 180° REVERSE-PHASE BACK-TO-BACK BALUNS 180° REVERSE-PHASE HYBRID-RING COUPLERS CPW-SLOTLINE 180° REVERSE-PHASE HYBRID-RING COUPLERS REDUCED-SIZE UNIPLANAR 180° REVERSE-PHASE HYBRID-RING COUPLERS ASYMMETRICAL COPLANAR STRIP 180° REVERSE-PHASE HYBRID-RING COUPLERS 90° BRANCH-LINE COUPLERS MICROSTRIP BRANCH-LINE COUPLERS CPW-SLOTLINE BRANCH-LINE COUPLERS ASYMMETRICAL COPLANAR STRIP BRANCH-LINE COUPLERS 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 WAVEGUIDE RING RESONATORS AND FILTERS 10 1 INTRODUCTION 10 2 WAVEGUIDE RING RESONATORS 10 2 1 REGULAR RESONANT MODES 10 2 2 SPLIT RESONANT MODES 10 2 3 FORCED RESONANT MODES 10 3 WAVEGUIDE RING FILTERS 10 3 1 DECOUPLED RESONANT MODES 10 3 2 SINGLE-CAVITY DUAL-MODE FILTERS 10 3 3 TWO-CAVITY DUAL-MODE FILTERS RING ANTENNAS AND FREQUENCY-SELECTIVE SURFACES 11 1 INTRODUCTION 11 2 RING ANTENNA CIRCUIT MODEL 11 2 1 APPROXIMATIONS AND FIELDS 11 2 2 WALL ADMITTANCE CALCULATION 11 2 3 INPUT IMPEDANCE FORMULATION FOR THE DOMINANT MODE 11 2 4 OTHER REACTIVE TERMS 11 2 5 OVERALL INPUT IMPEDANCE 11 2 6 COMPUTER SIMULATION 11 3 CIRCULAR POLARIZATION AND DUAL-FREQUENCY RING ANTENNAS 11 4 SLOTLINE RING ANTENNAS 11 5 ACTIVE ANTENNAS USING RING CIRCUITS 11 6 FREQUENCY-SELECTIVE SURFACES 11 7 RE?ECTARRAYS USING RING RESONATORS RING MIXERS, OSCILLATORS, AND OTHER APPLICATIONS 12 1 INTRODUCTION 12 2 RAT-RACE BALANCED MIXERS 12 3 SLOTLINE RING QUASI-OPTICAL MIXERS 12 4 RING OSCILLATORS 12 5 MICROWAVE OPTOELECTRONICS APPLICATIONS 12 6 METAMATERIALS USING SPLIT-RING RESONATORS