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Class Number: 333 Class Title: WAVE TRANSMISSION LINES AND NETWORKS Subclass Subclass Number Title 1 PLURAL CHANNEL SYSTEMS 1.1 .Nonreciprocal gyromagnetic type (e.g., circulators) 2 .With automatic control 3 ..Line substitution 4 .With balanced circuits 5 ..Plural balanced circuits 100 .Having branched circuits 101 ..Including switching means 102 ...Having gyromagnetic operating means 103 ...Having semiconductor operating means 104 ....Using TEM lines 105 ...Having mechanical switching means 106 ....Using rotary switching means 107 .....For TEM lines 108 ....For waveguide 109 ..Using directional coupler 110 ...For providing frequency separation 111 ...For providing adjustable coupling 112 ...Having lumped parameters or impedances 113 ...Having parallel-guide waveguide 114 ...Having crossed-guide waveguide 115 ...Having TEM lines 116 ....Using stripline 117 ..Including hybrid-type network 118 ...Having lumped parameters or impedances 119 ....Using transformer coil 120 ...Having hybrid ring junction 121 ...Having hybrid-T (e.g., magic-T) 122 ....Using waveguide 123 ...Having coaxial element 124 ..With impedance matching 125 ...Including long line element 126 ....For providing frequency separation 127 ....Using TEM lines 128 .....Stripline 129 ...For providing frequency separation 130 ...Using resistors only 131 ...Using coupled windings 132 ..For providing frequency separation 133 ...Utilizing electromechanical transducer 134 ...Utilizing long line element 135 ....Including waveguide element 136 ..Including long line element 137 ...Using waveguide 12 TRANSMISSION LINE INDUCTIVE OR RADIATION INTERFERENCE REDUCTION SYSTEMS 13 RESONATOR-TYPE BREAKDOWN DISCHARGE SYSTEMS (E.G., T-R OR R-T SYSTEMS) 14 AMPLITUDE COMPRESSION AND EXPANSION SYSTEMS (I.E., COMPANDERS) 15 PILOT LINE-CONTROLLED SYSTEMS 16 PILOT CURRENT-CONTROLLED SYSTEMS 17.1 AUTOMATICALLY CONTROLLED SYSTEMSS 17.2 .Limiting of amplitude 17.3 .Impedance matching 18 .With control of equalizer and/or delay network 19 DIFFERENTIATING OR INTEGRATING SYSTEMS 20 WAVE-SHAPING 21 R WAVE MODE CONVERTERS 21 A .Polarization converters 22 R DISSIPATING TERMINATIONS FOR LONG LINES 22 F .Fluid-cooling 23 ARTIFICIAL LINES 24 R COUPLING NETWORKS 24.1 .Nonreciprocal gyromagnetic type (e.g., directional phase shifters) 24.2 ..Nonreciprocal attenuators or isolators 24.3 ..Nonreciprocal polarization rotators 25 .Balanced to unbalanced circuits 26 ..Having long line elements 27 .Interlinking long line 28 R .Equalizers 28 T ..Audio tone control 138 .Delay lines including a lumped parameter 139 ..Variable parameter 140 ..Physical structure 141 .Delay lines including elastic bulk wave propagation means 142 ..Multipath propagation 143 ...Spurious signal reduction 144 ..Variable delay 145 ..Nonuniform propagation path 146 ..Helical propagation path 147 ..Propagation path has significant chemical or physical properties 148 ..Including magnetostrictive transducers 149 ..Significant transducer structure 150 .Delay lines including elastic surface wave propagation means 151 ..Spurious signal or mode cancellation means 152 ..Variable delay 153 ..Including discontinuities within propagation means 154 ..Significant transmitting or receiving transducer structure 155 ..Temperature stabilization or compensation 156 .Delay lines including long line elements 157 ..Waveguide 158 ...Including ferrite means 159 ...Having mechanically movable delay control means 160 ..Coaxial line 161 ..Planar line structure (e.g., stripline) 162 ..Helical line structures and lines developed from a helical structure 163 ...Having plural concentric helices 164 ..Control of delay with semiconductive means 32 .With impedance matching 33 ..Having long line elements 34 ...Tapered 35 ...Quarter-wave transformer type 165 .Frequency or time domain filters and delay lines utilizing charge transfer devices 166 .Time domain filters 167 .Frequency domain filters utilizing only lumped parameters 168 ..Including recurrent sectionss 169 ..Wheatstone or lattice type 170 ..Bridge type 171 ...With variable response 172 ..RC or RL type 173 ..Synchronous filters 174 ..With variable response 175 ..Resonant, discrete frequency selective type 176 ...Including specific frequency rejection means 177 ..Transformer coupled 178 ...Including bandwidth adjusting, shaping, or stabilization means 179 ...With permeability tuning means 180 ...With variable coupling means 181 ..Smoothing type (e.g., direct current power supply filters or decoupling filters) 182 ...Feedthrough type 183 ....Resiliently mounted components 184 ...Monolithic structure 185 ..Having significant physical structure 186 .Electromechanical filter 187 ..Using bulk mode piezoelectric vibrator 188 ...With means for varying response 189 ...Plural coupled vibrators 190 ....Lattice structure 191 ....Monolithic structure 192 .....With electrical coupling 193 ..Using surface acoustic waves 194 ...Including spurious signal prevention or reduction means 195 ...With wave-modifying means (e.g., reflectors, resonators, diffractors, multistrip couplers, etc.) 196 ...With response weighting means 197 ..Plural mechanically coupled bar, plate, or rod-type resonating means 198 ...Plural interresonator coupling paths 199 ...Plural mechanically coupled disk resonators 200 ..Reed- or fork-type resonators 201 ..Magnetostrictive wave transmission path 202 .Wave filters including long line elements 203 ..Digital structure 204 ..Stripline or microstrip 205 ...Tunable 206 ..Coaxial 207 ...Tunable 208 ..Waveguide 209 ...Tunable 210 ...Including evanescent guide sections 211 ...Including frequency selective absorbing means 212 ...Including directly coupled resonant sections 24 C .Capacity coupling 213 NEGATIVE RESISTANCE OR REACTANCE NETWORKS OF THE ACTIVE TYPE 214 .Simulating specific type of reactance 215 ..Using gyrator 216 .Having negative impedance 217 ..Providing negative resistance 81 R ATTENUATORS 81 A .Coaxial or microstrip 81 B .Waveguide type 218 FREQUENCY MULTIPLIERSS 219 RESONATORS (DISTRIBUTED PARAMETER TYPE) 219.1 .Dielectric type 219.2 .Magnetic type 220 .Open wire or Lecher line 221 ..With tuning 222 .Coaxial or shielded 223 ..With tuning 224 ...Having movable element 225 ....Using movable shorting means 226 ....Using plunger, rod, or piston 227 .Cavity resonator 228 ..With mode suppressor 229 ..With temperature compensation 230 ..With coupling 231 ..With tuning 232 ...Having movable element 233 ....Using movable wall 234 .Temperature compensated 235 .With tuning 236 LONG LINES 237 .Leaky lines 238 .Strip type 239 .Waveguide type 240 ..Surface wave 241 ..Flexible 242 ..Circular or helical structure 243 .Shielded type 244 ..Including spaced, electrically compensated, internal support means 245 LONG LINE ELEMENTS AND COMPONENTS 246 .Strip type 247 ..Semiconductor mounts 248 .Waveguide elements and components 249 ..Bend 250 ..Active element mounting 251 ..Mode suppressor 252 ..Window 253 ..Including variable impedance 254 ..Connectors and interconnections 255 ...Quick disconnect 256 ...Movable 257 ....In line 258 ..Switch 259 ...Mechanically movable 260 .Connectors and interconnections 261 ..Rotary coupling 262 .Switch 263 .Including variable impedance 99 R MISCELLANEOUS 99 S .Superconductive 99 PL .Plasma 99 MP .Multipactor applications