فیلترها با رزوناتورهای حلزونی و حلزونی تا شده

PREFACE 1 INTRODUCTION 2 FIELD CONFIGURATION AND COUPLING MECHANISM 2.1 SHEATH HELIX 2.1.1 Without External Shield, in Free Space 2.1.2 With External, Cylindrical, Perfectly ConductingShield in Free Space 2.1.3 Special Cases 2.2 ASSUMED CURRENT DISTRIBUTION OF ANINFINITELY THIN HELIX 2.3 EXACT FORMULATION OF BOUNDARYCONDITIONS USING HELICAL COORDINATES 2.3.1 Tape Helix 2.4 SUMMARY 3 METHODS OF EXTENDING THE BANDWIDTH 4 VARIATION OF FILTER BANDWIDTH WITH CENTER FREQUENCY 5 TRADE-OFFS INVOLVING UNLOADED Q-FACTOR 6 TEMPERATURE AND MECHANICAL STABILITY 7 HARMONIC RERESONANCES AND FOLDED RESONATORS APPENDIX I OPTIMUM CONVENTIONAL RESONATOR I.1 PROPORTIONS OF AN OPTIMAL CONVENTIONALHELICAL RESONATOR APPENDIX II FIELD DERIVATION II.1 THE ELECTROMAGNETIC FIELD OF A SHEATHHELIX IN FREE SPACE SURROUNDED BY ACONCENTRIC CONDUCTIVE CYLINDERDERIVED FROM FIRST PRINCIPLES II.1.1 Maxwell’s Equations in Cylindrical Coordinates II.1.2 Field Components Inside Helix II.1.3 Field Components Outside Helix II.2 BOUNDARY CONDITIONS II.2.1 Inside Helix II.2.2 Outside Helix APPENDIX III COMPUTER PROGRAMS III.1 BUTTERWORTH PROGRAM III.2 HELICAL-C PROGRAM III.3 HELICAL-S PROGRAM BIBLIOGRAPHY INDEX